Analysis
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max time kernel
86s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
26/01/2024, 06:21
Behavioral task
behavioral1
Sample
2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe
Resource
win10v2004-20231222-en
General
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Target
2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe
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Size
1.1MB
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MD5
5cacd6f1b5cec25f3f0b0b3c4d5807d3
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SHA1
41b8851bc57462502b0113ee1f2579dff5d94f4f
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SHA256
c73cb93ad9ad6d003b505ce2b960d75467ad612786e0559c74dca18426fb9400
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SHA512
7d46037825e5f34f02105c45ee05e03e4c2d7e73889a43c4e47704e27e563cae63f5d0dffb01a2d628ad0b3962e31cebf44dbed5892b6e1a995c45ee2c0714b4
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SSDEEP
24576:ZBUIKn/vwOXGUXAjCymYZiVtElVIBT2roqnTSSxWeT/dRPOO82WQHUq7:F0dwAYZt6C31WeTVRPOh27Uq7
Malware Config
Extracted
djvu
http://zexeq.com/raud/get.php
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extension
.vapo
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offline_id
BUcuB8PRg0LNi380axIJs5BS8nCUdeo9U88L2Lt1
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payload_url
http://colisumy.com/dl/build2.exe
http://zexeq.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 1 IoCs
resource yara_rule behavioral2/files/0x0007000000023233-9.dat family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation 2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe Key value queried \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation 2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 4608 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\88287fd5-0f51-4ef2-83b0-6d4eed0ca0e4\\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe\" --AutoStart" 2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_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.
flow ioc 1 api.2ip.ua 3 api.2ip.ua 11 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
pid Process 624 2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe 624 2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe 4032 2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe 4032 2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 624 wrote to memory of 4608 624 2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe 88 PID 624 wrote to memory of 4608 624 2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe 88 PID 624 wrote to memory of 4608 624 2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe 88 PID 624 wrote to memory of 4032 624 2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe 89 PID 624 wrote to memory of 4032 624 2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe 89 PID 624 wrote to memory of 4032 624 2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:624 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\88287fd5-0f51-4ef2-83b0-6d4eed0ca0e4" /deny *S-1-1-0:(OI)(CI)(DE,DC)2⤵
- Modifies file permissions
PID:4608
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C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe" --Admin IsNotAutoStart IsNotTask2⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
PID:4032
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize1KB
MD58daed5fecd6b7116eb16ea66eda552e0
SHA1bb2149a2541f11dc4da8df7f4579dd65c341ce8b
SHA256076f87f4acbece273de34b83b72bb1a4cf38135f1cf27c49722ce8dfe5c60d71
SHA512eeb7e9bea6db27a316e09dd4cdaae0ccbb3d895e56dad92f54e59a6bb13e450fb6bfb09972f7a23aadba82960af004a7b72852d477b14b80d9d5a68dd6859fc7
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize724B
MD58202a1cd02e7d69597995cabbe881a12
SHA18858d9d934b7aa9330ee73de6c476acf19929ff6
SHA25658f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA51297ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize410B
MD5c9571b842d2b33d1d800a8e5b2cbcd44
SHA18fd8d53d1489ba4a8ee03b73324fafde93e617b7
SHA256040ee48c9f7e87642537425106d7e84d18983a3637b70a20c7afa4f95a2be71f
SHA512191d326e9dd821e1e8dadad9f8833b9ab6d195eb54430e5777327109f9c234160425be5a2dd6eec3ce9faa7cefce4322729238632f88ee32bcb62ad43f7ddcb8
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5cb767efea648e7ee7d43d1b8a745f8da
SHA14acbb3acaeb44cbc73fdc2cdf906569e755bb401
SHA256ef3f5e08dd5568da42bf9dbf29638529abb776d8290345c2c25be375a0a62b01
SHA512815ac3e11f0bfa170d6a19e811691801859712e9a17671f5beee41a1a7ccc9e58be7404b852b6f39d759289d6a5c9b8c012fea5a15d27d23ca596298ff575c78
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C:\Users\Admin\AppData\Local\88287fd5-0f51-4ef2-83b0-6d4eed0ca0e4\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe
Filesize1.1MB
MD55cacd6f1b5cec25f3f0b0b3c4d5807d3
SHA141b8851bc57462502b0113ee1f2579dff5d94f4f
SHA256c73cb93ad9ad6d003b505ce2b960d75467ad612786e0559c74dca18426fb9400
SHA5127d46037825e5f34f02105c45ee05e03e4c2d7e73889a43c4e47704e27e563cae63f5d0dffb01a2d628ad0b3962e31cebf44dbed5892b6e1a995c45ee2c0714b4
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Filesize
859B
MD561bb6956d202cdd7d061a546d2f00162
SHA1de5f774f3b949d3b226cf097d221652fc4cd9bcc
SHA2563f8372424f809ca0ac4e87a6e9ca057d401b5c9797d339c2c553e00f32b9be29
SHA51290214586fd1ca92c0d15d9140c6897c1c442a31152128d9b3716245ea33b772680d0b6251f85334c9a0c687765350d04008aba9e3aee02f2b083e7a98d64c8e6