Analysis
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max time kernel
143s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20240419-en -
resource tags
arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system -
submitted
22-05-2024 10:04
Static task
static1
Behavioral task
behavioral1
Sample
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe
Resource
win10v2004-20240508-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
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ransomnote
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Signatures
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Detected Djvu ransomware 13 IoCs
Processes:
resource yara_rule behavioral1/memory/3020-2-0x0000000004550000-0x000000000466B000-memory.dmp family_djvu behavioral1/memory/1828-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1828-8-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1828-9-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1828-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-45-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-46-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-47-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-50-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-52-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-53-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-54-0x0000000000400000-0x0000000000537000-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:
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b0bf3935-e296-4e6d-bde3-38b2f0677dc8\\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 9 api.2ip.ua 3 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exedescription pid process target process PID 3020 set thread context of 1828 3020 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 2652 set thread context of 2600 2652 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 3 IoCs
Processes:
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exepid process 1828 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 2600 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 2600 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe -
Suspicious use of WriteProcessMemory 30 IoCs
Processes:
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exedescription pid process target process PID 3020 wrote to memory of 1828 3020 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 3020 wrote to memory of 1828 3020 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 3020 wrote to memory of 1828 3020 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 3020 wrote to memory of 1828 3020 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 3020 wrote to memory of 1828 3020 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 3020 wrote to memory of 1828 3020 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 3020 wrote to memory of 1828 3020 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 3020 wrote to memory of 1828 3020 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 3020 wrote to memory of 1828 3020 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 3020 wrote to memory of 1828 3020 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 3020 wrote to memory of 1828 3020 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 1828 wrote to memory of 2824 1828 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe icacls.exe PID 1828 wrote to memory of 2824 1828 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe icacls.exe PID 1828 wrote to memory of 2824 1828 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe icacls.exe PID 1828 wrote to memory of 2824 1828 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe icacls.exe PID 1828 wrote to memory of 2652 1828 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 1828 wrote to memory of 2652 1828 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 1828 wrote to memory of 2652 1828 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 1828 wrote to memory of 2652 1828 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 2652 wrote to memory of 2600 2652 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 2652 wrote to memory of 2600 2652 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 2652 wrote to memory of 2600 2652 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 2652 wrote to memory of 2600 2652 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 2652 wrote to memory of 2600 2652 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 2652 wrote to memory of 2600 2652 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 2652 wrote to memory of 2600 2652 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 2652 wrote to memory of 2600 2652 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 2652 wrote to memory of 2600 2652 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 2652 wrote to memory of 2600 2652 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 2652 wrote to memory of 2600 2652 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:3020 -
C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe"C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1828 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\b0bf3935-e296-4e6d-bde3-38b2f0677dc8" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2824 -
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:2652 -
C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe"C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2600
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
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
MD54f56afe84d680d02a1d3a64b4e76166e
SHA184fe896c20a1981ec57653cf2ca0223486ed0605
SHA256576cd89e100349a03d8411491ebe0f051b4d84e4861a36ccbad9321ba060e4d8
SHA5126121b2ca4d8123294e6a8aedb4618c2fb0da97814d996c739ea8c72575d676e380e20dcc4284147ec72033c313392d17c1614d4c4961ef9fbd718a73da053c64
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize344B
MD5dfa18b6efdf5498433ff6ff55df6b792
SHA16d39db48624dc90ae3331466859f3a68bbfe1a6c
SHA256e38fe3a2dbb4aeb7427bc418e886c04cdd863833ebba082317eda4b7983b18cd
SHA5125ee7e62a48c7244f5ce1f9772b9ca6dc03329b83acf9451c980029304dd0113746fa473dcff7ce02e0b9b7460cfb30f56933fd17de7018ca99aa0d1184d4fb41
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5e4099c6219bbe2ebd9e072f4101c4227
SHA1221021504f78b3b2b9e5a4e8f52d3774a07ac9ae
SHA2560ca04ecec4c422af17297a36fe66323804394a5b5e006962ef068a4ab24ab133
SHA512bd2011281844d42f1cedc9904a34b19ee2a0acd8f40d1edc706738aac4f8b0cbff7a6c1b2c452c2f7385774797fd95cce9142970fb138e9122e6969421f93502
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Filesize
68KB
MD529f65ba8e88c063813cc50a4ea544e93
SHA105a7040d5c127e68c25d81cc51271ffb8bef3568
SHA2561ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
SHA512e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa
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C:\Users\Admin\AppData\Local\b0bf3935-e296-4e6d-bde3-38b2f0677dc8\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe
Filesize702KB
MD5dd1cb88ac4542fea3c32b4ff7c60483e
SHA1b4b716636014911d002c72ca8e35fb90c7074b76
SHA256645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012
SHA512df9929a028576507fbf9307a723877eee25463868499c10d3b2c45defd665331f2425e96a6ad2035f7baa6a0c2fe3a75830d56a9bfc8ae44f1e846043d9f12f1