Analysis
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max time kernel
141s -
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
21-05-2024 23:35
Static task
static1
Behavioral task
behavioral1
Sample
c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral2
Sample
c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
Resource
win11-20240426-en
General
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Target
c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
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Size
805KB
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MD5
503be6986d24118cfbe56e9cb9748193
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SHA1
025ae1229044bb5bf5559f9cb447d026391eb5df
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SHA256
c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf
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SHA512
a16e29bbdb70a9cdac67996e4e76e08b69830bb5ee4d432ba01adb5cae204105c81bd15a95c52d1a2199b76b87aa9a9c295fcafb4ec50565967645814368a175
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SSDEEP
12288:unHenMyYcoFXKrKtWe198EIXj24h1ogqMYVvrcVfY:k+nBEKuoe19IXjnvkVjcVg
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/2036-2-0x00000000041D0000-0x00000000042EB000-memory.dmp family_djvu behavioral2/memory/3272-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3272-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3272-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3272-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3272-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3924-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3924-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3924-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3924-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3924-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3924-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3924-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3924-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3924-37-0x0000000000400000-0x0000000000537000-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:
c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3938118698-2964058152-2337880935-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\36ae9291-ed8c-4672-adfb-31276c7a2d2a\\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe\" --AutoStart" c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.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:
c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exec3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exedescription pid process target process PID 2036 set thread context of 3272 2036 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 984 set thread context of 3924 984 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.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:
c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exec3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exepid process 3272 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe 3272 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe 3924 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe 3924 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exec3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exec3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exedescription pid process target process PID 2036 wrote to memory of 3272 2036 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2036 wrote to memory of 3272 2036 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2036 wrote to memory of 3272 2036 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2036 wrote to memory of 3272 2036 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2036 wrote to memory of 3272 2036 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2036 wrote to memory of 3272 2036 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2036 wrote to memory of 3272 2036 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2036 wrote to memory of 3272 2036 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2036 wrote to memory of 3272 2036 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2036 wrote to memory of 3272 2036 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 3272 wrote to memory of 1440 3272 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe icacls.exe PID 3272 wrote to memory of 1440 3272 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe icacls.exe PID 3272 wrote to memory of 1440 3272 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe icacls.exe PID 3272 wrote to memory of 984 3272 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 3272 wrote to memory of 984 3272 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 3272 wrote to memory of 984 3272 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 984 wrote to memory of 3924 984 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 984 wrote to memory of 3924 984 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 984 wrote to memory of 3924 984 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 984 wrote to memory of 3924 984 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 984 wrote to memory of 3924 984 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 984 wrote to memory of 3924 984 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 984 wrote to memory of 3924 984 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 984 wrote to memory of 3924 984 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 984 wrote to memory of 3924 984 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 984 wrote to memory of 3924 984 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe"C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2036 -
C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe"C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3272 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\36ae9291-ed8c-4672-adfb-31276c7a2d2a" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1440 -
C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe"C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:984 -
C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe"C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3924
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
MD5a1d955617a4d146e70544d0d9a0390ca
SHA15ffdc4453b23e24a7cb0e634b26864c169f5257b
SHA2568dbff2c0018158256912d87dd495a68c351303a319f50f204a930317e867aeb3
SHA5120bffbc27638b12cc04f335de8c4f3c74df01ae55b56f389f8d046d797b4c62d31bbff057ea75ce32f67cdd3b878fd0aad3eb62e983f814296e1b94de3c6ba810
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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
MD59475db8ab3cfafaaddf4fc8190d94214
SHA1b2ec13a5fcdf6870d7f45dbb43bdba4509c17244
SHA256aa9c3c74a334fab790c997494c03925fde4ddd281efa0002f9fc7f35f4ed3fb5
SHA512fd48188e473d99eedb704b00cda9360d39615bc80baf024952d6ceeb7298ce52878ebe7bbb3d3f5b2813a0414455fd274220b75b77ec06d435b65e5a96b78e84
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5bac2cbcff6e3e52c8ca7a43c0ba16df3
SHA1e7e2ce0957ab3b6a2a32b6d95bd15a2a2c5300bb
SHA2564a077fa987237e6a8a97c21c3a6cd4cb83b29e2ccd8e13ebb3176994527d80d7
SHA512431b5cfbb5b65d0fdcc5d2a8faaf69f83578208f747ddcd8c22ec16e0764080be61fc3597a2620c091d46a9dcc8cf01767dcf996ab14253b65ac62a415f1518e
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C:\Users\Admin\AppData\Local\36ae9291-ed8c-4672-adfb-31276c7a2d2a\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
Filesize805KB
MD5503be6986d24118cfbe56e9cb9748193
SHA1025ae1229044bb5bf5559f9cb447d026391eb5df
SHA256c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf
SHA512a16e29bbdb70a9cdac67996e4e76e08b69830bb5ee4d432ba01adb5cae204105c81bd15a95c52d1a2199b76b87aa9a9c295fcafb4ec50565967645814368a175