Analysis
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max time kernel
132s -
max time network
124s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
02-06-2024 12:50
Behavioral task
behavioral1
Sample
2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe
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Size
1.1MB
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MD5
4025241aa35f544c34e1f79cff7f5a3d
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SHA1
d064744c4d522406908aaee40d87d9fda54b6339
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SHA256
9660a3b6f287bacbe76f7d4208fbd48e7be4b303e7d4c398b9826912668a5cd6
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SHA512
7a74c18e2377bf628b85e2b530ed62825a52193f33e458ebe90116cb210631fa4f1ba4f1809b5bb4c0573bdb66970137182ca8a095cff6712c65cb169363e329
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SSDEEP
24576:ZBUIKn/vwOXGUXAjCymYZiVtElVIBT2roqnTSSxWeT/dRPOO83WQHUq7:F0dwAYZt6C31WeTVRPOh37Uq7
Malware Config
Extracted
djvu
http://cajgtus.com/test2/get.php
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extension
.qehu
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offline_id
jgILOjDrBgyzY4JmT3B2jDSyBmDPBruKk8bKs6t1
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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\930eb11a-3444-4fb5-a80d-800d6f15163d\2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe -
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_4025241aa35f544c34e1f79cff7f5a3d_stop.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\930eb11a-3444-4fb5-a80d-800d6f15163d\\2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe\" --AutoStart" 2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_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 12 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 4 IoCs
Processes:
2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exepid process 4180 2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe 4180 2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe 4196 2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe 4196 2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exedescription pid process target process PID 4180 wrote to memory of 1912 4180 2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe icacls.exe PID 4180 wrote to memory of 1912 4180 2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe icacls.exe PID 4180 wrote to memory of 1912 4180 2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe icacls.exe PID 4180 wrote to memory of 4196 4180 2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe 2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe PID 4180 wrote to memory of 4196 4180 2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe 2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe PID 4180 wrote to memory of 4196 4180 2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe 2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exe"1⤵
- Checks computer location settings
- 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\930eb11a-3444-4fb5-a80d-800d6f15163d" /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_4025241aa35f544c34e1f79cff7f5a3d_stop.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_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
MD58999aa854e3cae2cc82a314dc12420a3
SHA1e9d06ba69f37453368b35b0f601e3c391fc36e86
SHA256d9ce037a484b0cd8841a9f2ff72f44e4c1106b4edd257f76eaf4203e345cf196
SHA512b840dfcdc27db311280d0731f9b4fc36e0a1a7e16090d6e4936bb1d011994b9a585b2393af9aea80ace8468430309cd26acc5220d39a4173574c4d5198f644be
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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
MD5e3e887eb6523d74d23949791ee489680
SHA1097c1f9c3936a3647d853cf04db39acf5611d232
SHA256e50c98aee5a1f3f791cdad6232c2bcf05a4a937187d8ba6ba39ab2d9972fe9f7
SHA512a569ea3d58c2fe2dea4c7a4fdcd71c64a56b86f0b2076ca1b17667f04c922601a2d97fcad0b55db3135e2c473948d8628eea26d3cc02b3ca133a48655ed26d2f
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
392B
MD5ba8832ac355c0e4ebd18b7dae617b0e7
SHA1b881177ff798bd5144315e1eb3ba2cdad553026d
SHA2561233e5a9f59dce8bbbd3f1c7ec26397608d1fff32b820b807d37dceeec3637a4
SHA51264c8527cf3749bea5beaa319655527008b18ffd593a8e9d00e27ef766654d496c414c596b7d31756d40178883df110db8ca732c620eef96e7567c2288c5ec048
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C:\Users\Admin\AppData\Local\930eb11a-3444-4fb5-a80d-800d6f15163d\2024-06-02_4025241aa35f544c34e1f79cff7f5a3d_stop.exeFilesize
1.1MB
MD54025241aa35f544c34e1f79cff7f5a3d
SHA1d064744c4d522406908aaee40d87d9fda54b6339
SHA2569660a3b6f287bacbe76f7d4208fbd48e7be4b303e7d4c398b9826912668a5cd6
SHA5127a74c18e2377bf628b85e2b530ed62825a52193f33e458ebe90116cb210631fa4f1ba4f1809b5bb4c0573bdb66970137182ca8a095cff6712c65cb169363e329