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
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 behavioral2/memory/3388-2-0x00000000041E0000-0x00000000042FB000-memory.dmp family_djvu behavioral2/memory/3376-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3376-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3376-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3376-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3376-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2884-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2884-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2884-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2884-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2884-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2884-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2884-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2884-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2884-37-0x0000000000400000-0x0000000000537000-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:
c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2551177587-3778486488-1329702901-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\1c9b8368-48de-4dac-85c9-b0665178a4c7\\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 1 api.2ip.ua 2 api.2ip.ua 5 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exec7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exedescription pid process target process PID 3388 set thread context of 3376 3388 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1748 set thread context of 2884 1748 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 3376 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe 3376 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe 2884 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe 2884 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exec7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exec7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exedescription pid process target process PID 3388 wrote to memory of 3376 3388 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3388 wrote to memory of 3376 3388 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3388 wrote to memory of 3376 3388 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3388 wrote to memory of 3376 3388 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3388 wrote to memory of 3376 3388 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3388 wrote to memory of 3376 3388 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3388 wrote to memory of 3376 3388 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3388 wrote to memory of 3376 3388 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3388 wrote to memory of 3376 3388 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3388 wrote to memory of 3376 3388 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3376 wrote to memory of 872 3376 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe icacls.exe PID 3376 wrote to memory of 872 3376 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe icacls.exe PID 3376 wrote to memory of 872 3376 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe icacls.exe PID 3376 wrote to memory of 1748 3376 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3376 wrote to memory of 1748 3376 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 3376 wrote to memory of 1748 3376 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1748 wrote to memory of 2884 1748 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1748 wrote to memory of 2884 1748 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1748 wrote to memory of 2884 1748 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1748 wrote to memory of 2884 1748 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1748 wrote to memory of 2884 1748 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1748 wrote to memory of 2884 1748 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1748 wrote to memory of 2884 1748 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1748 wrote to memory of 2884 1748 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1748 wrote to memory of 2884 1748 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe PID 1748 wrote to memory of 2884 1748 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:3388 -
C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe"C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3376 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\1c9b8368-48de-4dac-85c9-b0665178a4c7" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:872 -
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:1748 -
C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe"C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2884
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
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
MD5a9a8c36c44644f018a47c8bdae5a7cd3
SHA11e74376993a8a56021777d3055d00e6aa388ceac
SHA256febc399223fad9e1b6ed690ebe475a0be6ce6a81ec33cc20309423172dd699f3
SHA512c0e2840105b97c63876eac1a89bd87de27ae5bf72858bd6036af11389b6b3e82c7834de57f3f6fab562a213c620e97c8158dce0018ee1b8a0edf6243ebe34da4
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD558af5cfaa624d78612e5fbddf1e1d664
SHA1785024b87055ca6338b4280ba27bf2a1caa1ac07
SHA25614be27f4bf40b10eba86e835e4faf74d57a578a68dd82822697dd8c2a72f7d1b
SHA5128f024b4e799e5a9b896aba982a5bd07b159e72529e7c640836c7d8fe4a6d8561bc0148941c6596f3a15c4b8c496083133f32ada39fead80080934d5cf64634b9
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C:\Users\Admin\AppData\Local\1c9b8368-48de-4dac-85c9-b0665178a4c7\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
Filesize783KB
MD55fbc11643953158e26571772a8edc74a
SHA194fedc97feb2d2df2745c6fcd5501a1a114a0d75
SHA256c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166
SHA5126b7f54e3a520aea87838d0b1185504b20d265ff53e7e4a7c8177f4da660fd308aab220489b0a833b41cb76d3b637834ed3a987265aee56251dfc3f6d3fb4a988