Analysis
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max time kernel
141s -
max time network
123s -
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 04:41
Static task
static1
Behavioral task
behavioral1
Sample
c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
Resource
win10v2004-20240508-en
Behavioral task
behavioral2
Sample
c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
Resource
win11-20240426-en
General
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Target
c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
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Size
783KB
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MD5
5fbc11643953158e26571772a8edc74a
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SHA1
94fedc97feb2d2df2745c6fcd5501a1a114a0d75
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SHA256
c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166
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SHA512
6b7f54e3a520aea87838d0b1185504b20d265ff53e7e4a7c8177f4da660fd308aab220489b0a833b41cb76d3b637834ed3a987265aee56251dfc3f6d3fb4a988
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SSDEEP
12288:8oIZKVz6wlKt08bkEeQvl0huevWm5A/oKwUaRKI4Aq66k17rp/Bl00iG6+G:F2Khc0CyT55A/oKva8I4G6kDZi
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 15 IoCs
Processes:
resource yara_rule behavioral1/memory/3896-2-0x00000000040B0000-0x00000000041CB000-memory.dmp family_djvu behavioral1/memory/4020-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4020-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4020-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4020-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4020-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4136-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4136-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4136-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4136-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4136-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4136-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4136-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4136-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4136-37-0x0000000000400000-0x0000000000537000-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:
c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\fe7f5bbf-5988-447d-a7ea-6487b7b4efb1\\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe\" --AutoStart" c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.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 11 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exec7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exedescription pid process target process PID 3896 set thread context of 4020 3896 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1232 set thread context of 4136 1232 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.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:
c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exec7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exepid process 4020 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe 4020 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe 4136 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe 4136 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exec7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exec7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exedescription pid process target process PID 3896 wrote to memory of 4020 3896 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3896 wrote to memory of 4020 3896 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3896 wrote to memory of 4020 3896 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3896 wrote to memory of 4020 3896 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3896 wrote to memory of 4020 3896 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3896 wrote to memory of 4020 3896 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3896 wrote to memory of 4020 3896 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3896 wrote to memory of 4020 3896 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3896 wrote to memory of 4020 3896 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3896 wrote to memory of 4020 3896 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 4020 wrote to memory of 3984 4020 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe icacls.exe PID 4020 wrote to memory of 3984 4020 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe icacls.exe PID 4020 wrote to memory of 3984 4020 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe icacls.exe PID 4020 wrote to memory of 1232 4020 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 4020 wrote to memory of 1232 4020 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 4020 wrote to memory of 1232 4020 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1232 wrote to memory of 4136 1232 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1232 wrote to memory of 4136 1232 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1232 wrote to memory of 4136 1232 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1232 wrote to memory of 4136 1232 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1232 wrote to memory of 4136 1232 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1232 wrote to memory of 4136 1232 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1232 wrote to memory of 4136 1232 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1232 wrote to memory of 4136 1232 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1232 wrote to memory of 4136 1232 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1232 wrote to memory of 4136 1232 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe"C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3896 -
C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe"C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4020 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\fe7f5bbf-5988-447d-a7ea-6487b7b4efb1" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3984 -
C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe"C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1232 -
C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe"C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4136
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
MD5cb35bd9d6c5a4fd50a9263018bbd9784
SHA1efec24f93d2af7bd01969c36870ebc928fa6c790
SHA256be648ee93df285417e494e28c01e3ab8f3d043845f4d3b397dfd137d187ed612
SHA512ac26182fb167458da4b465b118720470859e8028db8d3d71ddbe0c5be0e46b9178c5f7ccb8b1252c38754e27da1af546f8d2f6e32e1bfcbeac0d510aa831bf11
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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
MD5531039475b8e1ce89504b3b255528146
SHA185ce619f07fea4a403d3eda9637ec2a44f035d87
SHA256c046a73a2d1459f0f44c7a7abc78b375d497c56d2ac567fc7c08bf5240851d8b
SHA5129dd0df91f6508468e530431ed9851e506ec1aeb157a87fac56376c74ce4fba13c8f9b2c986b4fb6042dbab74f34a83ef570fb30e072d0ed64541a60ae7e22cb0
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5e737f752779b7dd3ef534920a0625919
SHA1665fad5cc4fefbfa4b4b273b986bb45b272d1f04
SHA2569b82a61fd764a96063beebe2bc4317d97939ee3b62dd9d97dbc1b7b4d159cabf
SHA512d676e4011e32ab1e34acf670eacd5546ddf7efb5e80fd2b894ad305559715eb7764e681c4ca3981ed61df917300a6fca2c62e70b860b3629d25cc47f12a2fed0
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C:\Users\Admin\AppData\Local\fe7f5bbf-5988-447d-a7ea-6487b7b4efb1\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
Filesize783KB
MD55fbc11643953158e26571772a8edc74a
SHA194fedc97feb2d2df2745c6fcd5501a1a114a0d75
SHA256c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166
SHA5126b7f54e3a520aea87838d0b1185504b20d265ff53e7e4a7c8177f4da660fd308aab220489b0a833b41cb76d3b637834ed3a987265aee56251dfc3f6d3fb4a988