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Analysis
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max time kernel
117s -
max time network
118s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
08/01/2025, 19:50
Static task
static1
Behavioral task
behavioral1
Sample
bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
Resource
win10v2004-20241007-en
General
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Target
bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
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Size
766KB
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MD5
2cb8c190f4cc23501bc6965d9d762977
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SHA1
3b6f667d28eec165a2ccfaed4fb3cf87084b06ed
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SHA256
bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2
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SHA512
295dee006e2d991ffc6b8016a02a2e171973552527bfa3c040f91aabb46c2233c62dbf41dec0d97db61ac1f145c875f79a3bfa28c09b74c1ed23016abd729697
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SSDEEP
12288:nKDiXNmHNpcGWH69SIW5JBvOwcMBl4tT5jVXctOpctHni7LEwvn:nMiXNKNpM6jW5JDcIit+OpAHUEw/
Malware Config
Extracted
djvu
http://cajgtus.com/test1/get.php
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extension
.held
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offline_id
vyhLHcV0DMKjS0CgDoJGF0yJ299laBK7lZQM9Tt1
- payload_url
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ransomnote
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Signatures
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Detected Djvu ransomware 15 IoCs
resource yara_rule behavioral1/memory/2520-2-0x00000000021A0000-0x00000000022BB000-memory.dmp family_djvu behavioral1/memory/2172-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2172-8-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2172-9-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2172-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2912-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2912-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2912-47-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2912-49-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2912-48-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2912-51-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2912-57-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2912-59-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2912-60-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2912-61-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Djvu family
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Modifies file permissions 1 TTPs 1 IoCs
pid Process 2904 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\6e64a241-e4bd-483b-9ea9-7edb05275002\\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe\" --AutoStart" bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.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 5 api.2ip.ua 9 api.2ip.ua 4 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 2520 set thread context of 2172 2520 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 30 PID 2744 set thread context of 2912 2744 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 34 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 5 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language icacls.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 2172 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 2172 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 2912 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 2912 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 2520 wrote to memory of 2172 2520 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 30 PID 2520 wrote to memory of 2172 2520 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 30 PID 2520 wrote to memory of 2172 2520 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 30 PID 2520 wrote to memory of 2172 2520 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 30 PID 2520 wrote to memory of 2172 2520 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 30 PID 2520 wrote to memory of 2172 2520 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 30 PID 2520 wrote to memory of 2172 2520 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 30 PID 2520 wrote to memory of 2172 2520 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 30 PID 2520 wrote to memory of 2172 2520 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 30 PID 2520 wrote to memory of 2172 2520 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 30 PID 2520 wrote to memory of 2172 2520 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 30 PID 2172 wrote to memory of 2904 2172 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 32 PID 2172 wrote to memory of 2904 2172 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 32 PID 2172 wrote to memory of 2904 2172 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 32 PID 2172 wrote to memory of 2904 2172 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 32 PID 2172 wrote to memory of 2744 2172 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 33 PID 2172 wrote to memory of 2744 2172 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 33 PID 2172 wrote to memory of 2744 2172 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 33 PID 2172 wrote to memory of 2744 2172 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 33 PID 2744 wrote to memory of 2912 2744 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 34 PID 2744 wrote to memory of 2912 2744 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 34 PID 2744 wrote to memory of 2912 2744 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 34 PID 2744 wrote to memory of 2912 2744 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 34 PID 2744 wrote to memory of 2912 2744 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 34 PID 2744 wrote to memory of 2912 2744 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 34 PID 2744 wrote to memory of 2912 2744 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 34 PID 2744 wrote to memory of 2912 2744 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 34 PID 2744 wrote to memory of 2912 2744 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 34 PID 2744 wrote to memory of 2912 2744 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 34 PID 2744 wrote to memory of 2912 2744 bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe 34
Processes
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C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe"C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe"1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2520 -
C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe"C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe"2⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2172 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\6e64a241-e4bd-483b-9ea9-7edb05275002" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
- System Location Discovery: System Language Discovery
PID:2904
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C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe"C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2744 -
C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe"C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe" --Admin IsNotAutoStart IsNotTask4⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:2912
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1KB
MD5c9be626e9715952e9b70f92f912b9787
SHA1aa2e946d9ad9027172d0d321917942b7562d6abe
SHA256c13e8d22800c200915f87f71c31185053e4e60ca25de2e41e160e09cd2d815d4
SHA5127581b7c593785380e9db3ae760af85c1a889f607a3cd2aa5a2695a0e5a0fe8ee751578e88f7d8c997faeda804e2fc2655d859bee2832eace526ed4379edaa3f5
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Filesize
436B
MD5971c514f84bba0785f80aa1c23edfd79
SHA1732acea710a87530c6b08ecdf32a110d254a54c8
SHA256f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895
SHA51243dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Filesize174B
MD5300620d85bae4aaabf127aa12b5192a0
SHA1da9e7a9d911e970a36e4b7975d00d1754c218e4d
SHA256d87ae2f31047aa611ab3fcf63522bbc47a77dde03c261ade05aaaf3a38d75fc7
SHA512e03845af1127deb2bdc32312adc2d59179eb088d334966ef6ab35817103a7d20f7ecff422e54edec937d65b68b3da479e265880d40ff305b9487c342c2ea1aa2
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
Filesize170B
MD54c3562d55ba5d7e8a99ad19f9f560f58
SHA1e940f1ce0b6d147c9d36148fb323647444723ea0
SHA25647412308c10a82fe3db33c04d5886ffdb0b42b367fa4114b951bfc5d937ac6a4
SHA512df112e89ebbe20dce6050f742722537d390d262f7b314b3c2c25a23abb7f95f7a775486eba64f21558766c56304c3e5d753a41f323db27936f477f58c2682c33
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C:\Users\Admin\AppData\Local\6e64a241-e4bd-483b-9ea9-7edb05275002\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
Filesize766KB
MD52cb8c190f4cc23501bc6965d9d762977
SHA13b6f667d28eec165a2ccfaed4fb3cf87084b06ed
SHA256bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2
SHA512295dee006e2d991ffc6b8016a02a2e171973552527bfa3c040f91aabb46c2233c62dbf41dec0d97db61ac1f145c875f79a3bfa28c09b74c1ed23016abd729697
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Filesize
70KB
MD549aebf8cbd62d92ac215b2923fb1b9f5
SHA11723be06719828dda65ad804298d0431f6aff976
SHA256b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
SHA512bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b