Analysis
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max time kernel
145s -
max time network
145s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
26/01/2024, 09:49
Static task
static1
Behavioral task
behavioral1
Sample
770875a906b4931c20fc1abf90bd3728.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
770875a906b4931c20fc1abf90bd3728.exe
Resource
win10v2004-20231215-en
General
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Target
770875a906b4931c20fc1abf90bd3728.exe
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Size
758KB
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MD5
770875a906b4931c20fc1abf90bd3728
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SHA1
ee3a2a7399459c55de025b9a20a1aef3e770cb83
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SHA256
187329e42948ef198658234eed2b95a769decf507415a6e4acc1a1eb4429e1db
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SHA512
4aad8881caa4d33bc018291d22d9cf7993f5eeade1e6fc7f19995e2dbfa4af4fe9e585a5a18d382fc07798a53c0aa3a8ca8e87b7443bf01548adee92266fd974
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SSDEEP
12288:ONr496jPTGSg8D+R6u0UbwvrI7TsDFHM0noXUzVFuAWE5yWzuyJpypD9ARwoOc:OFu6jPTGSLPvM7YRsliFuPiKD925
Malware Config
Extracted
djvu
http://astdg.top/fhsgtsspen6/get.php
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extension
.nooa
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offline_id
PLtnD1U6oAmgxgJ2nJik1mY9SwUQg07CiN0zSet1
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payload_url
http://securebiz.org/dl/build2.exe
http://astdg.top/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 17 IoCs
resource yara_rule behavioral2/memory/3040-2-0x0000000004B30000-0x0000000004C4B000-memory.dmp family_djvu behavioral2/memory/1212-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1212-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1212-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1212-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1212-16-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4588-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4588-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4588-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4588-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4588-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4588-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4588-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4588-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4588-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4588-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4588-37-0x0000000000400000-0x0000000000537000-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.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation 770875a906b4931c20fc1abf90bd3728.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 4612 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-768304381-2824894965-3840216961-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c236505a-fe42-45d2-b7b6-a6d0d3e3a648\\770875a906b4931c20fc1abf90bd3728.exe\" --AutoStart" 770875a906b4931c20fc1abf90bd3728.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.
flow ioc 16 api.2ip.ua 17 api.2ip.ua 25 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 3040 set thread context of 1212 3040 770875a906b4931c20fc1abf90bd3728.exe 89 PID 4068 set thread context of 4588 4068 770875a906b4931c20fc1abf90bd3728.exe 96 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1212 770875a906b4931c20fc1abf90bd3728.exe 1212 770875a906b4931c20fc1abf90bd3728.exe 4588 770875a906b4931c20fc1abf90bd3728.exe 4588 770875a906b4931c20fc1abf90bd3728.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 3040 wrote to memory of 1212 3040 770875a906b4931c20fc1abf90bd3728.exe 89 PID 3040 wrote to memory of 1212 3040 770875a906b4931c20fc1abf90bd3728.exe 89 PID 3040 wrote to memory of 1212 3040 770875a906b4931c20fc1abf90bd3728.exe 89 PID 3040 wrote to memory of 1212 3040 770875a906b4931c20fc1abf90bd3728.exe 89 PID 3040 wrote to memory of 1212 3040 770875a906b4931c20fc1abf90bd3728.exe 89 PID 3040 wrote to memory of 1212 3040 770875a906b4931c20fc1abf90bd3728.exe 89 PID 3040 wrote to memory of 1212 3040 770875a906b4931c20fc1abf90bd3728.exe 89 PID 3040 wrote to memory of 1212 3040 770875a906b4931c20fc1abf90bd3728.exe 89 PID 3040 wrote to memory of 1212 3040 770875a906b4931c20fc1abf90bd3728.exe 89 PID 3040 wrote to memory of 1212 3040 770875a906b4931c20fc1abf90bd3728.exe 89 PID 1212 wrote to memory of 4612 1212 770875a906b4931c20fc1abf90bd3728.exe 90 PID 1212 wrote to memory of 4612 1212 770875a906b4931c20fc1abf90bd3728.exe 90 PID 1212 wrote to memory of 4612 1212 770875a906b4931c20fc1abf90bd3728.exe 90 PID 1212 wrote to memory of 4068 1212 770875a906b4931c20fc1abf90bd3728.exe 91 PID 1212 wrote to memory of 4068 1212 770875a906b4931c20fc1abf90bd3728.exe 91 PID 1212 wrote to memory of 4068 1212 770875a906b4931c20fc1abf90bd3728.exe 91 PID 4068 wrote to memory of 4588 4068 770875a906b4931c20fc1abf90bd3728.exe 96 PID 4068 wrote to memory of 4588 4068 770875a906b4931c20fc1abf90bd3728.exe 96 PID 4068 wrote to memory of 4588 4068 770875a906b4931c20fc1abf90bd3728.exe 96 PID 4068 wrote to memory of 4588 4068 770875a906b4931c20fc1abf90bd3728.exe 96 PID 4068 wrote to memory of 4588 4068 770875a906b4931c20fc1abf90bd3728.exe 96 PID 4068 wrote to memory of 4588 4068 770875a906b4931c20fc1abf90bd3728.exe 96 PID 4068 wrote to memory of 4588 4068 770875a906b4931c20fc1abf90bd3728.exe 96 PID 4068 wrote to memory of 4588 4068 770875a906b4931c20fc1abf90bd3728.exe 96 PID 4068 wrote to memory of 4588 4068 770875a906b4931c20fc1abf90bd3728.exe 96 PID 4068 wrote to memory of 4588 4068 770875a906b4931c20fc1abf90bd3728.exe 96
Processes
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C:\Users\Admin\AppData\Local\Temp\770875a906b4931c20fc1abf90bd3728.exe"C:\Users\Admin\AppData\Local\Temp\770875a906b4931c20fc1abf90bd3728.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3040 -
C:\Users\Admin\AppData\Local\Temp\770875a906b4931c20fc1abf90bd3728.exe"C:\Users\Admin\AppData\Local\Temp\770875a906b4931c20fc1abf90bd3728.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1212 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\c236505a-fe42-45d2-b7b6-a6d0d3e3a648" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4612
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C:\Users\Admin\AppData\Local\Temp\770875a906b4931c20fc1abf90bd3728.exe"C:\Users\Admin\AppData\Local\Temp\770875a906b4931c20fc1abf90bd3728.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4068 -
C:\Users\Admin\AppData\Local\Temp\770875a906b4931c20fc1abf90bd3728.exe"C:\Users\Admin\AppData\Local\Temp\770875a906b4931c20fc1abf90bd3728.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4588
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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
MD573ce21ff1fb2989f6350ace9274ae9b5
SHA17db6c387eb8351f3e8e361d10224711c3477821e
SHA256d7005273bab949c42fcc73eac7820c4c5f08df1e9095020cdb0e17fc9e282d50
SHA512a43767a55a559a8bf51d5dcb9bc378167f63e15f571b6be35903048570d036fed2a3f6a37c91f469ee9808d245cdd875b9dad38556e6bf97258a82c7071aeab3
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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
MD574adee8a8bf071e721106cd4008f1623
SHA10a92a27b1fcf107c46c71564d617c946f426862c
SHA256f0fdcc083da31b13b39252e150b00f5206ec7ab389056c378ce9981845027d39
SHA512937cc6650def3a5162d88976a20ddd1ca713398da2f11ff5e568b333899c56a93555b030c45e5df4a29940fa2f6fca6d19cb3395ac68e5ccb2d986c7e750b5df
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5b3a2356cbd5ce42914c79bc4a111a750
SHA16c9ac4a2daea1b306f776924ef9b52963e1ade36
SHA256ae2731e9ee452f4c5345d8ac23c91782f215d55bbb4881da3fa15e4fd5ca7e3b
SHA512eb6b4f9ff2810408b44266879e7fd0dba287699f7e43c531bb12097fff33955c93efa483b11e7254e43e949942dff697cbd951b128b568a4d5cc60a359578b84
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C:\Users\Admin\AppData\Local\c236505a-fe42-45d2-b7b6-a6d0d3e3a648\770875a906b4931c20fc1abf90bd3728.exe
Filesize758KB
MD5770875a906b4931c20fc1abf90bd3728
SHA1ee3a2a7399459c55de025b9a20a1aef3e770cb83
SHA256187329e42948ef198658234eed2b95a769decf507415a6e4acc1a1eb4429e1db
SHA5124aad8881caa4d33bc018291d22d9cf7993f5eeade1e6fc7f19995e2dbfa4af4fe9e585a5a18d382fc07798a53c0aa3a8ca8e87b7443bf01548adee92266fd974