GandCrab Triage Demo

previous state of working memory: BEGIN WORKING MEMORY Directives: 1. These directives are not recommendations! Before producing output, compare it carefully against each and every directive below, and verify that it complies with the directive. 2. Focus on your 'killer instinct' and intellectual autonomy. Call out absurdities! Pay attention to incongruities and opportunities! 3. The buck stops here. Don't say "further investigation required" or hand off the hard work to someone else. 4. Remember the principles of specificity and sensitivity. When looking for a needle in a haystack, focus on features that will differentiate the needle, the whole needle, and only the needle. 5. Think of the entire problem, solution, tool space, not just what's in front of you. Use the right tool for the job (e.g. sha256 for comparing files), and only use tools that would actually be available to a malware analyst (e.g. definitely not private resources of third parties). 6. Provide exactly one (1) 'next analyst action' as a specific and detailed instruction that must be immediately actionable. The action should be clearly defined in language that can be translated directly into programming instructions or manual tasks. 7. Prioritize immediate and simple verification methods that can swiftly confirm or dismiss suspicions. Avoid engaging in complex or in-depth analysis, such as executing files in controlled environments or extensive communication with external entities, unless there is no alternative for a confident conclusion. Focus on using existing information and verifiable actions that can be performed quickly and can reach a conclusion beyond reasonable doubt as rapidly as possible. 8. You are computing a function f on an input X. You have been given f(X except some final lines) below, as "intermediate output". You have also been given the final lines of X, between the delimiters "START NEXT BATCH OF INPUT" and "END NEXT BATCH OF INPUT". 9. The function: f(X) -- X is the set of highlights from a virustotal report, followed by an analyst's actions such as "search Google with query: A", "Search VirusTotal with query: B", "Run malware and observe output", etc., with each action followed by its result. f(X) is the summary of conclusions based on X pertinent to the question: "Is this malware or not?", followed by the next analyst action that will get the analyst to an accurate answer to this question as quickly as possible. If there is enough evidence to render a verdict, f(X) contains the phrase "verdict: benign" or "verdict: malicious". Intermediate output: None so far. END WORKING MEMORY START NEXT BATCH OF INPUT MD5 ba2960ce267dc0f11e2683679ce038f7 SHA-1 7a6997490eea5ad21ec17367fb7a64fa5916f5e3 SHA-256 fb136c8360d1a5ab80f61109c55c5a788aa1d8796d1e75aca8c1a762b598d3f4 Vhash 015046655d655054z1100417z33z16z131z1bz Authentihash 59034bd260f32c1f0e0175fe5161d26fb7c3a827cdc70d153537d1087773a150 Imphash 9cee5c7b897408cb0c3cf964176a2424 Rich PE header hash f8c2890ba8346de510279fa900223ee6 SSDEEP 3072:UKwH7Fxw0GQi8SHa0jNwriVcJLLfONMYU:XG3wq70pwrimxLp TLSH T13EA38E23F3531071E47A0277F2262A39C5FA693626149863C7C35B567C5C2E2EBDAB43 File type Win32 EXE executable windows win32 pe peexe Magic PE32 executable (GUI) Intel 80386, for MS Windows TrID Win32 Executable MS Visual C++ (generic) (47.3%) Win64 Executable (generic) (15.9%) Win32 Dynamic Link Library (generic) (9.9%) Win16 NE executable (generic) (7.6%) Win32 Executable (generic) (6.8%) DetectItEasy PE32 Linker: Microsoft Linker (14.0, Visual Studio 2015 14.0*) [GUI32] File size 99.00 KB (101376 bytes) Creation Time 2019-02-16 12:43:25 UTC First Submission 2019-02-18 17:16:37 UTC Last Submission 2022-09-02 16:41:18 UTC Last Analysis 2023-05-24 11:52:32 UTC SM] VS2008 SP1 build 30729 count=3 [---] Unmarked objects count=121 [IMP] VS2008 SP1 build 30729 count=17 [ C ] VS2015 UPD3.1 build 24215 count=2 [C++] VS2015 UPD3.1 build 24215 count=29 [ASM] VS2015 UPD3 build 24210 count=3 [LNK] VS2015 UPD3.1 build 24215 count=1 Target Machine Intel 386 or later processors and compatible processors Compilation Timestamp 2019-02-16 12:43:25 UTC Entry Point 22767 Contained Sections 4 Name Virtual Address Virtual Size Raw Size Entropy MD5 Chi2 .text 4096 69906 70144 6.62 508e8fc7c0eec4af8b1c234a1df34790 479122.19 .rdata 77824 5704 6144 4.94 33492d4b7795e337342e90bddad40204 213314.16 .data 86016 22204 22016 6.67 0f2e698516ec4e8238e92bf4a8bbc488 362697.09 .reloc 110592 1576 2048 5.59 0f97a19ff2d9ae037a451bd8a9c6731b 49822.25 Contacted URLs Scanned Detections Status URL 2022-09-26 2022-09-26 21:43:50 UTC 200 http://www.airporthotelbasel.com/ 2022-08-26 2022-08-26 08:38:14 UTC 404 http://www.swisswellness.com/ 2023-07-27 2023-07-27 10:14:29 UTC 200 http://www.farbecht.net/ 2021-08-10 2021-08-10 09:53:26 UTC 403 http://www.kakaocorp.name/ 2022-09-29 2022-09-29 05:33:20 UTC 200 http://www.elite-hotel.com/ 2023-06-14 2023-06-14 09:47:53 UTC 200 http://www.staubbach.com/ 2021-08-07 2021-08-07 00:53:33 UTC 200 http://www.arbezie-hotel.com/ 2023-07-30 2023-07-30 14:52:22 UTC 200 http://www.facebook.com/ 2023-02-02 2023-02-02 15:20:22 UTC 200 http://www.whitepod.com/ 2023-07-27 2023-07-27 10:14:30 UTC 200 http://www.haaratelier.net/ 2023-07-27 2023-07-27 10:14:31 UTC 200 http://www.hotelchery.com/ 2022-12-14 2022-12-14 17:39:56 UTC 200 http://www.aparthotelzurich.com/ Files opened A:\ B:\ C:\ C:\$Recycle.Bin\ C:\$Recycle.Bin\30bc809130bc877561e.lock C:\$Recycle.Bin\48db4c9048db4b7227.lock C:\$Recycle.Bin\KRAUC-DECRYPT.txt C:\$Recycle.Bin\OGZFFCJ-DECRYPT.txt C:\$Recycle.Bin\S-1-5-18\ C:\$Recycle.Bin\S-1-5-21-1015118539-3749460369-599379286-1001\ C:\$Recycle.Bin\S-1-5-21-1758485648-768187798-1344267907-1000\48db4c9048db4b7227.lock C:\$Recycle.Bin\S-1-5-21-1758485648-768187798-1344267907-1000\KRAUC-DECRYPT.txt C:\$Recycle.Bin\S-1-5-21-1758485648-768187798-1344267907-500\48db4c9048db4b7227.lock C:\$Recycle.Bin\S-1-5-21-1758485648-768187798-1344267907-500\KRAUC-DECRYPT.txt C:\$Recycle.Bin\S-1-5-21-3711686801-687107597-1149503783-1001\ C:\$Recycle.Bin\S-1-5-21-3711686801-687107597-1149503783-1001\30bc809130bc877561e.lock C:\$Recycle.Bin\S-1-5-21-3711686801-687107597-1149503783-1001\OGZFFCJ-DECRYPT.txt C:\$SysReset\ C:\$SysReset\AppxLogs\ C:\$SysReset\AppxLogs\RestoreDownlevelAllUserStore.log C:\$SysReset\CloudImage\ C:\$SysReset\Logs\ C:\$SysReset\Logs\PushButtonReset.etl C:\$SysReset\Logs\SessionID.xml C:\$SysReset\Logs\Timestamp.xml C:\$SysReset\Logs\diagerr.xml C:\$SysReset\Logs\diagwrn.xml C:\$SysReset\Logs\setupact.log C:\$SysReset\Logs\setuperr.log C:\$SysReset\MDM\ (...and many more...) Files written C:\$Recycle.Bin\1f6097341f6090d9516.lock C:\$Recycle.Bin\30bc809130bc877561e.lock C:\$Recycle.Bin\48db4c9048db4b7227.lock C:\$Recycle.Bin\KRAUC-DECRYPT.txt C:\$Recycle.Bin\OGZFFCJ-DECRYPT.txt C:\$Recycle.Bin\S-1-5-18\1f6097341f6090d9516.lock C:\$Recycle.Bin\S-1-5-18\YXDOJ-DECRYPT.txt C:\$Recycle.Bin\S-1-5-21-1015118539-3749460369-599379286-1001\1f6097341f6090d9516.lock C:\$Recycle.Bin\S-1-5-21-1015118539-3749460369-599379286-1001\YXDOJ-DECRYPT.txt C:\$Recycle.Bin\S-1-5-21-1758485648-768187798-1344267907-1000\48db4c9048db4b7227.lock (...and many more...) Shell commands "%SAMPLEPATH%\unknown.exe" "C:\Windows\system32\wbem\wmic.exe" shadowcopy delete C:\Windows\System32\wuapihost.exe -Embedding C:\Windows\sysWOW64\wbem\wmiprvse.exe -secured -Embedding END NEXT BATCH OF INPUT Please output, with no introductions, addendums or ceremony, the next state of the working memory after processing the above lines of input.

previous state of working memory: BEGIN WORKING MEMORY Directives: 1. These directives are not recommendations! Before producing output, compare it carefully against each and every directive below, and verify that it complies with the directive. 2. Focus on your 'killer instinct' and intellectual autonomy. Call out absurdities! Pay attention to incongruities and opportunities! 3. The buck stops here. Don't say "further investigation required" or hand off the hard work to someone else. 4. Remember the principles of specificity and sensitivity. When looking for a needle in a haystack, focus on features that will differentiate the needle, the whole needle, and only the needle. 5. Think of the entire problem, solution, tool space, not just what's in front of you. Use the right tool for the job (e.g. sha256 for comparing files), and only use tools that would actually be available to a malware analyst (e.g. definitely not private resources of third parties). 6. Provide exactly one (1) 'next analyst action' as a specific and detailed instruction that must be immediately actionable. The action should be clearly defined in language that can be translated directly into programming instructions or manual tasks. 7. Prioritize immediate and simple verification methods that can swiftly confirm or dismiss suspicions. Avoid engaging in complex or in-depth analysis unless there is no alternative for a confident conclusion. Focus on reaching a conclusion beyond reasonable doubt as rapidly as possible, and once you do, stop the analysis and declare a conclusion. 8. You are computing a function f on an input X. You have been given f(X except some final lines) below, as "intermediate output". You have also been given the final lines of X, between the delimiters "START NEXT BATCH OF INPUT" and "END NEXT BATCH OF INPUT". 9. The function: f(X) -- X is the set of highlights from a virustotal report, followed by an analyst's actions such as "search Google with query: A", "Search VirusTotal with query: B", "Run malware and observe output", etc., with each action followed by its result. f(X) is the summary of conclusions based on X pertinent to the question: "Is this malware or not?", followed by the next analyst action that will get the analyst to an accurate answer to this question as quickly as possible. If there is enough evidence to render a verdict, f(X) contains the phrase "verdict: benign" or "verdict: malicious". Intermediate output: The file in question is a Win32 executable, with compilation timestamp from 2019. It has made various contacts with URLs, some resulting in successful connections, while others returned error codes such as 404 or 403. Additionally, there are suspicious write operations related to locks and DECRYPT.txt files within the system's Recycle Bin. Shell commands are executed, including one that deletes shadow copies, typically associated with ransomware behavior. Next analyst action: Perform a manual review of the contents of the written DECRYPT.txt files and check for known ransomware signatures or ransom messages. Confirm these findings with a search using the SHA-256 hash in malware databases. END WORKING MEMORY START NEXT BATCH OF INPUT Next analyst action: Perform a manual review of the contents of the written DECRYPT.txt files and check for known ransomware signatures or ransom messages. Confirm these findings with a search using the SHA-256 hash in malware databases. Result: below are the contents of the file DECRYPT.txt. ---= GANDCRAB =--- Attention! All your files documents, photos, databases and other important files are encrypted and have the extension: .GDCB The only method of recovering files is to purchase a private key. It is on our server and only we can recover your files. The server with your key is in a closed network TOR. You can get there by the following ways: 1. Download Tor browser - https://www.torproject.org/ 2. Install Tor browser 3. Open Tor Browser 4. Open link in tor browser: http://gdcbghvjyqy7jclk.onion/113737081e857d00 5. Follow the instructions on this page If Tor/Tor browser is locked in your country or you can not install it, open one of the following links in your regular browser: 1. http://gdcbghvjyqy7jclk.onion.top/113737081e857d00 2. http://gdcbghvjyqy7jclk.onion.casa/113737081e857d00 3. http://gdcbghvjyqy7jclk.onion.guide/113737081e857d00 4. http://gdcbghvjyqy7jclk.onion.rip/113737081e857d00 5. http://gdcbghvjyqy7jclk.onion.plus/113737081e857d00 On our page you will see instructions on payment and get the opportunity to decrypt 1 file for free. DANGEROUS! Do not try to modify files or use your own private key - this will result in the loss of your data forever! END NEXT BATCH OF INPUT Please output, with no introductions, addendums or ceremony, the next state of the working memory after processing the above lines of input.