Analysis
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max time kernel
142s -
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
22-05-2024 10:01
Static task
static1
Behavioral task
behavioral1
Sample
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe
Resource
win10v2004-20240508-en
Behavioral task
behavioral2
Sample
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe
Resource
win11-20240508-en
General
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Target
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe
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Size
702KB
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MD5
dd1cb88ac4542fea3c32b4ff7c60483e
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SHA1
b4b716636014911d002c72ca8e35fb90c7074b76
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SHA256
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012
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SHA512
df9929a028576507fbf9307a723877eee25463868499c10d3b2c45defd665331f2425e96a6ad2035f7baa6a0c2fe3a75830d56a9bfc8ae44f1e846043d9f12f1
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SSDEEP
12288:WRuDXAgdLFderRBGPHzyoqJnG7suDKkrq3Daa1qG7GXiLSG4Bfp5C:WREdLXRPGBJG7Rekrq32awCSiLSPV
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
-
ransomnote
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Signatures
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Detected Djvu ransomware 15 IoCs
Processes:
resource yara_rule behavioral1/memory/3928-2-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/212-3-0x0000000004AE0000-0x0000000004BFB000-memory.dmp family_djvu behavioral1/memory/3928-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3928-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3928-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3928-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2016-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2016-26-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2016-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2016-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2016-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2016-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2016-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2016-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2016-36-0x0000000000400000-0x0000000000537000-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:
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.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\\ae0c12a6-3ca4-42a2-a5c4-101b1ba17d41\\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe\" --AutoStart" 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.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 4 api.2ip.ua 5 api.2ip.ua 18 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exedescription pid process target process PID 212 set thread context of 3928 212 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 1996 set thread context of 2016 1996 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.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:
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exepid process 3928 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 3928 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 2016 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 2016 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exedescription pid process target process PID 212 wrote to memory of 3928 212 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 212 wrote to memory of 3928 212 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 212 wrote to memory of 3928 212 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 212 wrote to memory of 3928 212 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 212 wrote to memory of 3928 212 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 212 wrote to memory of 3928 212 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 212 wrote to memory of 3928 212 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 212 wrote to memory of 3928 212 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 212 wrote to memory of 3928 212 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 212 wrote to memory of 3928 212 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 3928 wrote to memory of 1040 3928 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe icacls.exe PID 3928 wrote to memory of 1040 3928 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe icacls.exe PID 3928 wrote to memory of 1040 3928 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe icacls.exe PID 3928 wrote to memory of 1996 3928 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 3928 wrote to memory of 1996 3928 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 3928 wrote to memory of 1996 3928 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 1996 wrote to memory of 2016 1996 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 1996 wrote to memory of 2016 1996 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 1996 wrote to memory of 2016 1996 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 1996 wrote to memory of 2016 1996 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 1996 wrote to memory of 2016 1996 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 1996 wrote to memory of 2016 1996 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 1996 wrote to memory of 2016 1996 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 1996 wrote to memory of 2016 1996 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 1996 wrote to memory of 2016 1996 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 1996 wrote to memory of 2016 1996 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe"C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:212 -
C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe"C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3928 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\ae0c12a6-3ca4-42a2-a5c4-101b1ba17d41" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1040 -
C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe"C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1996 -
C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe"C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2016
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
MD5195fc28150bef9b30510eed36fb325af
SHA11ea8a314d8af1d431b77d5280d1782e9a8e867c6
SHA2565c2e51ccf5767f80257a0a0bb66dee40957e5379431e15a118e7f1343ad1f6e0
SHA512537da7e46d8b5afc796c1908042088c583c5380fb729f3665845fe36286b3efeaec9fa26475e9c2263f55b1eca04bd7ae26088a9a85950b2b7f750fd24eadcfc
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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
MD58dcf43fad1ff51ab8fdc006e013bed2f
SHA16fdd29dbee1c9a047ff20d34d1c5c52ada376a76
SHA2569b399c7b602b0768603a9bcc80377f4b8d4d4c867ba4e6fe493f35fffc98c33f
SHA5122a0309801b84a99bab2559128075efb7a1ca4fcc3677ddcc668fcb07186b8d7ad1494af7558360721cf3461bd958e4bec28b73db21a70e6906263df2718b99a5
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5052587e878d47611f302a8e29f262974
SHA19fafd0f76d01de3c8646e431e91513b4b5b634ad
SHA2561d23baae5e1a032a292874c4f467bb1b26b1fc81e593164dce1052591d78622e
SHA512e943b7fc84796e9b2e04bf4c474fc8299e2b794900743a1116ab85cc8059188ac8ffd0c938171b3cd09fbd907927aee741031e60b4d0391430d7cfe68c7ee93d
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C:\Users\Admin\AppData\Local\ae0c12a6-3ca4-42a2-a5c4-101b1ba17d41\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe
Filesize702KB
MD5dd1cb88ac4542fea3c32b4ff7c60483e
SHA1b4b716636014911d002c72ca8e35fb90c7074b76
SHA256645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012
SHA512df9929a028576507fbf9307a723877eee25463868499c10d3b2c45defd665331f2425e96a6ad2035f7baa6a0c2fe3a75830d56a9bfc8ae44f1e846043d9f12f1