Analysis
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max time kernel
122s -
max time network
123s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
02-06-2024 23:48
Behavioral task
behavioral1
Sample
2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe
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Size
1.1MB
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MD5
10ae98958bf7c0ab1ea79c665b3c9178
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SHA1
ecbbf43f2e6f66ca27f4a1279c9b482e2d0c261c
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SHA256
6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d
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SHA512
c3e0c8541a23a42fd3f63a609e5e253a0d72b5f1f775e838bfa3d3c941abfdc7ae1a22f90a7f63ec67e86fd12f80da9c08ae8b810abee0809c31dd24b6a7079b
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SSDEEP
24576:ZBUIKn/vwOXGUXAjCymYZiVtElVIBT2roqnTSSxWeT/dRPOO8SWQHUq7:F0dwAYZt6C31WeTVRPOhS7Uq7
Malware Config
Extracted
djvu
http://cajgtus.com/test1/get.php
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extension
.vepi
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offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://cajgtus.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\bd87cebf-8be1-4f97-a3f0-7ed2a30c3c2c\2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\bd87cebf-8be1-4f97-a3f0-7ed2a30c3c2c\\2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe\" --AutoStart" 2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe -
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 3 api.2ip.ua 4 api.2ip.ua 9 api.2ip.ua -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exepid process 2244 2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe 2600 2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exedescription pid process target process PID 2244 wrote to memory of 2700 2244 2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe icacls.exe PID 2244 wrote to memory of 2700 2244 2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe icacls.exe PID 2244 wrote to memory of 2700 2244 2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe icacls.exe PID 2244 wrote to memory of 2700 2244 2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe icacls.exe PID 2244 wrote to memory of 2600 2244 2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe 2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe PID 2244 wrote to memory of 2600 2244 2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe 2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe PID 2244 wrote to memory of 2600 2244 2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe 2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe PID 2244 wrote to memory of 2600 2244 2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe 2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe"1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\bd87cebf-8be1-4f97-a3f0-7ed2a30c3c2c" /deny *S-1-1-0:(OI)(CI)(DE,DC)2⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exe" --Admin IsNotAutoStart IsNotTask2⤵
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EAFilesize
1KB
MD5a2302c3b16124e8211ed629a5e35728b
SHA1bccf44bfea669fc7ad1d97a7cb32ac8152917f61
SHA256f108902accacd3de7d1e3ab0e9dff6997ab3c2e6aa0b3c63faf4ecb5fcf36b37
SHA5121b551561dcb85b9b7e40cd0ea7537c602efc6bd3cd4eb3b86bee44177869c0bb11565aac5ee33cdb5dae90bf6fa32cee8b2edcfec878a76fe7734ef9930df9fc
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
724B
MD58202a1cd02e7d69597995cabbe881a12
SHA18858d9d934b7aa9330ee73de6c476acf19929ff6
SHA25658f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA51297ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EAFilesize
410B
MD5029e16743ab709c885f90adbe2bd4d5d
SHA12cabe360c3f959a0cc97778a8385df9db6752f86
SHA256c3116f17cac05715f923edf09ab9a57a6cb380c6595674d8164e6a62d3fcf70a
SHA5127f7ffb59660b80901ec2ffc9a09b93986b365982c57a50ab50e76de63b99f6e3f4f6b09503403b277c9f309a4910862253a3f3f11e97f5b92508007bdac9eade
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015Filesize
344B
MD50070e69e73547c17018fd88d73432f61
SHA13133aaa8e05929e042bff7ebf35684a56cb82ae9
SHA25637c22a892f0ecd1136f628de1747e3e488bb40b47918fa50ea6b6a565ffcade0
SHA512454bbea30e743a250e27b4e1d45c6eea507322aba3ccb712c8eb0042aa01c7dba7f465584110f400e5524084766753cf129684b6a53be124d707fe251f7d4a6d
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
392B
MD555907faa57e2e19436a926bc7cc0161c
SHA1a1171105acc36d234b93c4ad039a29d27cb90a9f
SHA2564ab08b2f625a939248573f643f054503a62e0fe7d767b578fd9157ea488ab594
SHA51217c1c7b49fff2eeee641d6102cd6e3540fa729944cd4f8e5afaed5bf089fdb9429c64cd827278900573d57e6a9197f8e6f1a4ff8a61ab57dfb460b522c0a23ee
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C:\Users\Admin\AppData\Local\Temp\Cab23E5.tmpFilesize
65KB
MD5ac05d27423a85adc1622c714f2cb6184
SHA1b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA5126d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d
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C:\Users\Admin\AppData\Local\bd87cebf-8be1-4f97-a3f0-7ed2a30c3c2c\2024-06-02_10ae98958bf7c0ab1ea79c665b3c9178_stop.exeFilesize
1.1MB
MD510ae98958bf7c0ab1ea79c665b3c9178
SHA1ecbbf43f2e6f66ca27f4a1279c9b482e2d0c261c
SHA2566d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d
SHA512c3e0c8541a23a42fd3f63a609e5e253a0d72b5f1f775e838bfa3d3c941abfdc7ae1a22f90a7f63ec67e86fd12f80da9c08ae8b810abee0809c31dd24b6a7079b