Analysis
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max time kernel
141s -
max time network
129s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
21-05-2024 19:14
Static task
static1
Behavioral task
behavioral1
Sample
a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
Resource
win11-20240426-en
General
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Target
a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
-
Size
710KB
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MD5
8858045135c3537e4cc0ea6c49532cc4
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SHA1
03ea0b26b5766dfcf0cb376a408251755bb608f5
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SHA256
a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5
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SHA512
24edb6df506ed00d808f69e6494cdbaafa98c3387e698f2a0312b4feecf1a4008959c18e55f4b2ac62e488728cc0988d5b6b447c62b4e8b48b8faf4f1ea7a879
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SSDEEP
12288:YIJja8HJIClsdRWU9A9NfLfMs46sa97pOeMcgobLEk8MAz:/a8HVukU96dw4lOeMmb45
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 behavioral1/memory/404-2-0x0000000004150000-0x000000000426B000-memory.dmp family_djvu behavioral1/memory/856-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/856-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/856-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/856-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/856-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4768-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4768-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4768-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4768-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4768-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4768-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4768-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4768-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4768-37-0x0000000000400000-0x0000000000537000-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:
a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\335fcf07-9df7-4d3d-b6ef-17f5c081e04e\\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe\" --AutoStart" a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.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 3 api.2ip.ua 15 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exea5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exedescription pid process target process PID 404 set thread context of 856 404 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 3300 set thread context of 4768 3300 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.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:
a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exea5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exepid process 856 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe 856 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe 4768 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe 4768 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exea5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exea5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exedescription pid process target process PID 404 wrote to memory of 856 404 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 404 wrote to memory of 856 404 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 404 wrote to memory of 856 404 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 404 wrote to memory of 856 404 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 404 wrote to memory of 856 404 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 404 wrote to memory of 856 404 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 404 wrote to memory of 856 404 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 404 wrote to memory of 856 404 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 404 wrote to memory of 856 404 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 404 wrote to memory of 856 404 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 856 wrote to memory of 4356 856 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe icacls.exe PID 856 wrote to memory of 4356 856 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe icacls.exe PID 856 wrote to memory of 4356 856 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe icacls.exe PID 856 wrote to memory of 3300 856 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 856 wrote to memory of 3300 856 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 856 wrote to memory of 3300 856 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 3300 wrote to memory of 4768 3300 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 3300 wrote to memory of 4768 3300 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 3300 wrote to memory of 4768 3300 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 3300 wrote to memory of 4768 3300 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 3300 wrote to memory of 4768 3300 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 3300 wrote to memory of 4768 3300 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 3300 wrote to memory of 4768 3300 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 3300 wrote to memory of 4768 3300 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 3300 wrote to memory of 4768 3300 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 3300 wrote to memory of 4768 3300 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe"C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:404 -
C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe"C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:856 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\335fcf07-9df7-4d3d-b6ef-17f5c081e04e" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4356 -
C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe"C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3300 -
C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe"C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4768
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
MD5991e196c1a868bec1d72cff5e169b98a
SHA1d3c9d775393ba7aa6e8369dcce8348ae75efff90
SHA2566dd434bcb6027f43d2b87519e7657fd4b62b356aaeb7c9db7ef25a0b3657bbc8
SHA512c903f9393fffb9566f5f2038902ad7aab8046a6ad8cca38e46b609ce5eb9ed2975c746fa3456626770badd2624390bc337c532140bf29393028d95463f42fb69
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5bb94a67d131c34761ddfe7f90d464b05
SHA15535ea164296be3e24a24395a53939ee381c27af
SHA256fddfc5e2266dbb086164d4805589b85adacede43f1ae9f447bb55ba369979781
SHA5120fa6ab12ad6d94f946319ac01e115e2ca29c3a5da29841c583ba532733729d050dae25c5bac2edf64ed3e3cef023650912d73c9bd959030ae2c2547b17c4b7b4
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C:\Users\Admin\AppData\Local\335fcf07-9df7-4d3d-b6ef-17f5c081e04e\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
Filesize710KB
MD58858045135c3537e4cc0ea6c49532cc4
SHA103ea0b26b5766dfcf0cb376a408251755bb608f5
SHA256a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5
SHA51224edb6df506ed00d808f69e6494cdbaafa98c3387e698f2a0312b4feecf1a4008959c18e55f4b2ac62e488728cc0988d5b6b447c62b4e8b48b8faf4f1ea7a879