Analysis
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max time kernel
143s -
max time network
123s -
platform
windows11-21h2_x64 -
resource
win11-20240426-en -
resource tags
arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system -
submitted
23-05-2024 04:51
Static task
static1
Behavioral task
behavioral1
Sample
37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
Resource
win11-20240426-en
General
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Target
37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
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Size
807KB
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MD5
facb53cd1795e8855b6c35710034d98a
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SHA1
016c1626958a4a5bd9af4461672f403d54f37a4b
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SHA256
37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6
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SHA512
711960191216ffc25c74bac12af22a851e7d8d3841342edf1b23b390dc52f90ff27f6888e10fc25042ce69c5c7f949c9cef0adbabaf3a1f50e4624a637a974c3
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SSDEEP
12288:P4Rq05M/+a307OAHnYedSV3C0CkTsa8HImvAfppCDsPpJBpy0wsF:wFI3uOMSVy0CCsa8iTCDsPvfwsF
Malware Config
Extracted
djvu
http://cajgtus.com/test2/get.php
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extension
.vehu
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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 15 IoCs
Processes:
resource yara_rule behavioral2/memory/2572-2-0x0000000003DD0000-0x0000000003EEB000-memory.dmp family_djvu behavioral2/memory/3936-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3936-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3936-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3936-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3936-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/396-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/396-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/396-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/396-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/396-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/396-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/396-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/396-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/396-37-0x0000000000400000-0x0000000000537000-memory.dmp 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:
37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1230210488-3096403634-4129516247-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\aa61ef3d-a509-4af3-b6bb-ff1c4018748c\\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe\" --AutoStart" 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.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 1 api.2ip.ua 2 api.2ip.ua 6 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exedescription pid process target process PID 2572 set thread context of 3936 2572 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2336 set thread context of 396 2336 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.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:
37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exepid process 3936 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 3936 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 396 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 396 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exedescription pid process target process PID 2572 wrote to memory of 3936 2572 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2572 wrote to memory of 3936 2572 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2572 wrote to memory of 3936 2572 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2572 wrote to memory of 3936 2572 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2572 wrote to memory of 3936 2572 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2572 wrote to memory of 3936 2572 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2572 wrote to memory of 3936 2572 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2572 wrote to memory of 3936 2572 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2572 wrote to memory of 3936 2572 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2572 wrote to memory of 3936 2572 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 3936 wrote to memory of 1748 3936 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe icacls.exe PID 3936 wrote to memory of 1748 3936 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe icacls.exe PID 3936 wrote to memory of 1748 3936 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe icacls.exe PID 3936 wrote to memory of 2336 3936 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 3936 wrote to memory of 2336 3936 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 3936 wrote to memory of 2336 3936 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2336 wrote to memory of 396 2336 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2336 wrote to memory of 396 2336 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2336 wrote to memory of 396 2336 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2336 wrote to memory of 396 2336 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2336 wrote to memory of 396 2336 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2336 wrote to memory of 396 2336 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2336 wrote to memory of 396 2336 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2336 wrote to memory of 396 2336 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2336 wrote to memory of 396 2336 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe PID 2336 wrote to memory of 396 2336 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe 37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe"C:\Users\Admin\AppData\Local\Temp\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2572 -
C:\Users\Admin\AppData\Local\Temp\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe"C:\Users\Admin\AppData\Local\Temp\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3936 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\aa61ef3d-a509-4af3-b6bb-ff1c4018748c" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1748 -
C:\Users\Admin\AppData\Local\Temp\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe"C:\Users\Admin\AppData\Local\Temp\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2336 -
C:\Users\Admin\AppData\Local\Temp\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe"C:\Users\Admin\AppData\Local\Temp\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:396
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_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize1KB
MD57575c39a544943a68ce6e709c586005a
SHA14874b30bd1d455b28a95c4e21c5aecd1ea043d7a
SHA2564737de49245ace1ca1fdeaacd5feee9bbda88bc6f42c84a1ea7d316383792cf8
SHA512abf3d85393725113e720cbe8980b369236511e3984e8cbfa795f19bb5d6e39822e80a835caeb498581797a74b349765ba1a27f26586a17a66ae1c88bd066a3d1
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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
MD5fe4210b2a3486151393da7f7d06b50c1
SHA11d772b22b36d8a6e2b738d2aa707df635a9a5e0a
SHA256787e0bbc48d732eed7a02124e1c0407c4748f154bf515dc79e148809e9616a7e
SHA5124e73b35eefd00c270b0fac73b1882f1a151e67d4ae9f6447d4ed868f06da772c74213d80aa36e307ab834af50113252ecd37aa05d964a8cd5a2c30bc54cc62a0
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD505ae93ecf61b8f55b4d7acc8bf0cc32b
SHA1af99063ad093da054e0d4001b7278ca83421fedc
SHA256be5cb561b756cd7b220775ddaabfe6751ccad59998de3f674b7a1a1b47b857e3
SHA512afed1b39f242cba15334eb60a4c8cf7986aad24aff88d180a2bd9dd5f15a6f7d48699e0bdb5c491ebf0ce80cf621557b5e3597a1d0fa8f1a1db3cf8239c3fa23
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C:\Users\Admin\AppData\Local\aa61ef3d-a509-4af3-b6bb-ff1c4018748c\37653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6.exe
Filesize807KB
MD5facb53cd1795e8855b6c35710034d98a
SHA1016c1626958a4a5bd9af4461672f403d54f37a4b
SHA25637653651fd80037f8d8b4020444fd664673256489cb69c50e3e69f992958cee6
SHA512711960191216ffc25c74bac12af22a851e7d8d3841342edf1b23b390dc52f90ff27f6888e10fc25042ce69c5c7f949c9cef0adbabaf3a1f50e4624a637a974c3