Analysis
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max time kernel
144s -
max time network
126s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
23-05-2024 00:40
Static task
static1
Behavioral task
behavioral1
Sample
944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe
Resource
win10v2004-20240508-en
Behavioral task
behavioral2
Sample
944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe
Resource
win11-20240419-en
General
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Target
944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe
-
Size
710KB
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MD5
cca9237edd4e63088fea283e633dbd83
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SHA1
5bcfc7b04f39607d284e830d4996eee55b27153f
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SHA256
944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286
-
SHA512
0e7b51516dfe659815ea9ea16346e02b0399776e126b96b0d4843ff2c2cf18044c5c294b62e9ccfd8908987aa7ec7f50f07e0bd49cd31ede4b223d63352b239f
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SSDEEP
12288:uy0//K9mlrtGLDpyLbhqwF6RgINv59/y9PGCBuEghjdiBJet0TmqM4EpIOp86:uy0nKElrtGLDpyLbi/y9PGCsEgh5iu6y
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 16 IoCs
Processes:
resource yara_rule behavioral1/memory/4008-2-0x00000000049B0000-0x0000000004ACB000-memory.dmp family_djvu behavioral1/memory/3760-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3760-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3760-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3760-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3760-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2772-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2772-26-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2772-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2772-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2772-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2772-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2772-40-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2772-41-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2772-42-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2772-43-0x0000000000400000-0x0000000000537000-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.
Processes:
944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\1bd3e992-ab38-444b-af8b-fcea3a1de723\\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe\" --AutoStart" 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.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 15 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exedescription pid process target process PID 4008 set thread context of 3760 4008 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 984 set thread context of 2772 984 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe -
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:
944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exepid process 3760 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 3760 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 2772 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 2772 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exedescription pid process target process PID 4008 wrote to memory of 3760 4008 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 4008 wrote to memory of 3760 4008 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 4008 wrote to memory of 3760 4008 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 4008 wrote to memory of 3760 4008 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 4008 wrote to memory of 3760 4008 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 4008 wrote to memory of 3760 4008 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 4008 wrote to memory of 3760 4008 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 4008 wrote to memory of 3760 4008 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 4008 wrote to memory of 3760 4008 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 4008 wrote to memory of 3760 4008 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 3760 wrote to memory of 4200 3760 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe icacls.exe PID 3760 wrote to memory of 4200 3760 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe icacls.exe PID 3760 wrote to memory of 4200 3760 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe icacls.exe PID 3760 wrote to memory of 984 3760 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 3760 wrote to memory of 984 3760 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 3760 wrote to memory of 984 3760 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 984 wrote to memory of 2772 984 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 984 wrote to memory of 2772 984 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 984 wrote to memory of 2772 984 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 984 wrote to memory of 2772 984 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 984 wrote to memory of 2772 984 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 984 wrote to memory of 2772 984 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 984 wrote to memory of 2772 984 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 984 wrote to memory of 2772 984 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 984 wrote to memory of 2772 984 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe PID 984 wrote to memory of 2772 984 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe"C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4008 -
C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe"C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3760 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\1bd3e992-ab38-444b-af8b-fcea3a1de723" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4200 -
C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe"C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:984 -
C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe"C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2772
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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 --field-trial-handle=1288,i,11746347647270949551,7786733067759450703,262144 --variations-seed-version --mojo-platform-channel-handle=3940 /prefetch:81⤵PID:4604
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EAFilesize
1KB
MD57575c39a544943a68ce6e709c586005a
SHA14874b30bd1d455b28a95c4e21c5aecd1ea043d7a
SHA2564737de49245ace1ca1fdeaacd5feee9bbda88bc6f42c84a1ea7d316383792cf8
SHA512abf3d85393725113e720cbe8980b369236511e3984e8cbfa795f19bb5d6e39822e80a835caeb498581797a74b349765ba1a27f26586a17a66ae1c88bd066a3d1
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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
MD5269d47583e7e0d58e82d34c18810621d
SHA120d53f39858e34008cd5580f9effe411d7de3368
SHA256832cf38edc7999edb0b0f38c940fbde3dea69cf8c37b0bd035e41bccfb402610
SHA512e800b6906c5d60b9f7bd9b731e2a94cf80c07e24ea7d7954030237783fb797b3755117db24e3b889f4560d5447ac0accb2c58b87237be6a8f0fec9b71b42f22d
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
392B
MD5b123af24d20e4450408bd6bf5acd1a1b
SHA168c62539c667ee2d8cc1b9f257aaae3e2887d27b
SHA2566a16e8b8371b9573692b150e98639223ec8c5302a466141c5a6b2c45a5e0c8d1
SHA512ed734a0ad525b98b51675875959b2938f70cf0def46e8a3b393c646dbe74c7b5e25d9511a22942d871886cd132af98b9b5bc8f84521ad484b1ea583664fca3d6
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C:\Users\Admin\AppData\Local\1bd3e992-ab38-444b-af8b-fcea3a1de723\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exeFilesize
710KB
MD5cca9237edd4e63088fea283e633dbd83
SHA15bcfc7b04f39607d284e830d4996eee55b27153f
SHA256944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286
SHA5120e7b51516dfe659815ea9ea16346e02b0399776e126b96b0d4843ff2c2cf18044c5c294b62e9ccfd8908987aa7ec7f50f07e0bd49cd31ede4b223d63352b239f
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memory/2772-34-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/2772-40-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2772-43-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2772-24-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2772-26-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/2772-42-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/2772-41-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/2772-38-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2772-35-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/2772-33-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3760-3-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3760-6-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3760-4-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3760-5-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3760-21-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4008-1-0x0000000004910000-0x00000000049AE000-memory.dmpFilesize
632KB
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memory/4008-2-0x00000000049B0000-0x0000000004ACB000-memory.dmpFilesize
1.1MB