Analysis
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max time kernel
145s -
max time network
143s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
09/04/2024, 08:02
Static task
static1
Behavioral task
behavioral1
Sample
c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral2
Sample
c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe
Resource
win11-20240221-en
General
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Target
c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe
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Size
771KB
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MD5
f797618d3ffd9c1240db9d52a9a977ac
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SHA1
51683323368d28657a2916a2c7bd0e5d3b2f2f7c
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SHA256
c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3
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SHA512
be0c7e88ca37fdc212033c70e527e99d939c62c0846a39e79c3f87d81fb1b9a38f5da835a41f6a3e73f3f1ea2fb0f1eb420a010edd78edfaf44c06595e921482
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SSDEEP
24576:e7cwUFF1eUyif8Wg5Mbc0MEK/Qt0N5AM:e7cYSg5M0p7NOM
Malware Config
Extracted
djvu
http://sajdfue.com/test1/get.php
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extension
.uajs
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offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://sajdfue.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 17 IoCs
resource yara_rule behavioral1/memory/2660-2-0x0000000004A90000-0x0000000004BAB000-memory.dmp family_djvu behavioral1/memory/3284-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3284-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3284-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3284-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3284-16-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4320-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4320-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4320-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4320-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4320-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4320-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4320-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4320-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4320-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4320-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4320-38-0x0000000000400000-0x0000000000537000-memory.dmp 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.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 3796 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\09c57500-5d82-435e-a9b5-1e24c1fce9bd\\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe\" --AutoStart" c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.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 7 api.2ip.ua 8 api.2ip.ua 17 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 2660 set thread context of 3284 2660 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 94 PID 2604 set thread context of 4320 2604 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 99 -
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 3284 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 3284 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 4320 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 4320 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 2660 wrote to memory of 3284 2660 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 94 PID 2660 wrote to memory of 3284 2660 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 94 PID 2660 wrote to memory of 3284 2660 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 94 PID 2660 wrote to memory of 3284 2660 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 94 PID 2660 wrote to memory of 3284 2660 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 94 PID 2660 wrote to memory of 3284 2660 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 94 PID 2660 wrote to memory of 3284 2660 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 94 PID 2660 wrote to memory of 3284 2660 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 94 PID 2660 wrote to memory of 3284 2660 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 94 PID 2660 wrote to memory of 3284 2660 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 94 PID 3284 wrote to memory of 3796 3284 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 96 PID 3284 wrote to memory of 3796 3284 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 96 PID 3284 wrote to memory of 3796 3284 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 96 PID 3284 wrote to memory of 2604 3284 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 97 PID 3284 wrote to memory of 2604 3284 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 97 PID 3284 wrote to memory of 2604 3284 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 97 PID 2604 wrote to memory of 4320 2604 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 99 PID 2604 wrote to memory of 4320 2604 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 99 PID 2604 wrote to memory of 4320 2604 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 99 PID 2604 wrote to memory of 4320 2604 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 99 PID 2604 wrote to memory of 4320 2604 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 99 PID 2604 wrote to memory of 4320 2604 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 99 PID 2604 wrote to memory of 4320 2604 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 99 PID 2604 wrote to memory of 4320 2604 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 99 PID 2604 wrote to memory of 4320 2604 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 99 PID 2604 wrote to memory of 4320 2604 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 99
Processes
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C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe"C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2660 -
C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe"C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3284 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\09c57500-5d82-435e-a9b5-1e24c1fce9bd" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3796
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C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe"C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2604 -
C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe"C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4320
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1292 --field-trial-handle=2588,i,4353937220825226770,7138584070663735671,262144 --variations-seed-version /prefetch:81⤵PID:4348
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
MD5fc5408c48a55314c72e200b74330cac4
SHA17e8889ec3189a40e6078088927bf3612753fa628
SHA2567ea2a016d97635b1367455af2250cbf9e9c34d293829d11fc21ce905347590c4
SHA512481753ef755c188012919ea728ea0395f22b6ce83f2f9a11675be6072f154db141b2382dc62ad7c3c95e36596529176a66f40e3d118cf0e33ea8e6f716ae1d77
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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
MD51d5428cf3b208036f12c8d69a1b2fa6d
SHA1f37048b017910ca90e1851c21689b05b78996ec0
SHA256c16039fb90770622fef3fa76bce5cee2a96e799de30e931f1a075e85a63d5444
SHA512ee59ffe4ab18274d96d1035688a9574f13f3858397befa01082a729f922e6b509ad0a8d95da0b69abdea57e68c11a604184c95da5e6982966219fef8f4c23098
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD52d54fd29a0861e351e69e53652ec21e2
SHA161f42be74de7b7e819cc73f27ebd5286eb8330c8
SHA2563062860eb8018fd2195354474806594c4ed30ab6970d3f078fe597cdbc56387f
SHA5123f25bcfb5966f099acc7e3193ead5336603e4c160af84d27d78d207d96cca43b7b3bbdc2ab1e88245e32dfa626942493fbe0142c445d10a3d3e6ba0eba1e3542
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C:\Users\Admin\AppData\Local\09c57500-5d82-435e-a9b5-1e24c1fce9bd\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe
Filesize771KB
MD5f797618d3ffd9c1240db9d52a9a977ac
SHA151683323368d28657a2916a2c7bd0e5d3b2f2f7c
SHA256c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3
SHA512be0c7e88ca37fdc212033c70e527e99d939c62c0846a39e79c3f87d81fb1b9a38f5da835a41f6a3e73f3f1ea2fb0f1eb420a010edd78edfaf44c06595e921482