Analysis
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max time kernel
143s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
26/01/2024, 08:54
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
file.exe
Resource
win10v2004-20231215-en
General
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Target
file.exe
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Size
749KB
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MD5
87ba288f14fbf826d4cf061d9f8e72ed
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SHA1
ec1f877e40b5e8917953e54eb51834a15335aa6e
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SHA256
56529b359e4c4695a3e290752d61c59ad3327a16574da95ca69a214552241a63
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SHA512
200457f3c9f1120c6c97df354d7e9898e0a3dfecb6fb771985f9e28adaab29841e03e37e1100b759ae7baf89072859082aa3ddc340a8501396426441f8391f95
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SSDEEP
12288:lL++FQkxaH3tr2VBEMuw6mQVSql6SoP0bSJg5J8m5ubKrD4Akb5i2yj5+:U+FQkxI2E5oPI0Kp5ubKX4S+
Malware Config
Extracted
djvu
http://habrafa.com/test2/get.php
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extension
.cdxx
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offline_id
LBxKKiegnAy53rpqH3Pj2j46vwldiEt9kqHSuMt1
- payload_url
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ransomnote
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Signatures
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Detected Djvu ransomware 13 IoCs
resource yara_rule behavioral1/memory/1700-1-0x0000000004450000-0x000000000456B000-memory.dmp family_djvu behavioral1/memory/2356-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2356-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2356-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2356-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2584-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2584-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2584-44-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2584-46-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2584-50-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2584-53-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2584-52-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2584-54-0x0000000000400000-0x0000000000537000-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
pid Process 2672 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1268429524-3929314613-1992311491-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\de94aea9-7fce-48c6-9e75-ef55422fb8c9\\file.exe\" --AutoStart" file.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 3 api.2ip.ua 4 api.2ip.ua 9 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 1700 set thread context of 2356 1700 file.exe 28 PID 2592 set thread context of 2584 2592 file.exe 31 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 2356 file.exe 2584 file.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 1700 wrote to memory of 2356 1700 file.exe 28 PID 1700 wrote to memory of 2356 1700 file.exe 28 PID 1700 wrote to memory of 2356 1700 file.exe 28 PID 1700 wrote to memory of 2356 1700 file.exe 28 PID 1700 wrote to memory of 2356 1700 file.exe 28 PID 1700 wrote to memory of 2356 1700 file.exe 28 PID 1700 wrote to memory of 2356 1700 file.exe 28 PID 1700 wrote to memory of 2356 1700 file.exe 28 PID 1700 wrote to memory of 2356 1700 file.exe 28 PID 1700 wrote to memory of 2356 1700 file.exe 28 PID 1700 wrote to memory of 2356 1700 file.exe 28 PID 2356 wrote to memory of 2672 2356 file.exe 29 PID 2356 wrote to memory of 2672 2356 file.exe 29 PID 2356 wrote to memory of 2672 2356 file.exe 29 PID 2356 wrote to memory of 2672 2356 file.exe 29 PID 2356 wrote to memory of 2592 2356 file.exe 30 PID 2356 wrote to memory of 2592 2356 file.exe 30 PID 2356 wrote to memory of 2592 2356 file.exe 30 PID 2356 wrote to memory of 2592 2356 file.exe 30 PID 2592 wrote to memory of 2584 2592 file.exe 31 PID 2592 wrote to memory of 2584 2592 file.exe 31 PID 2592 wrote to memory of 2584 2592 file.exe 31 PID 2592 wrote to memory of 2584 2592 file.exe 31 PID 2592 wrote to memory of 2584 2592 file.exe 31 PID 2592 wrote to memory of 2584 2592 file.exe 31 PID 2592 wrote to memory of 2584 2592 file.exe 31 PID 2592 wrote to memory of 2584 2592 file.exe 31 PID 2592 wrote to memory of 2584 2592 file.exe 31 PID 2592 wrote to memory of 2584 2592 file.exe 31 PID 2592 wrote to memory of 2584 2592 file.exe 31
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1700 -
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2356 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\de94aea9-7fce-48c6-9e75-ef55422fb8c9" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2672
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2592 -
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2584
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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
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
MD55236d71f903b274c96f7942c93d85bb9
SHA1c54fe3cd67055a4ea66ae981b17e5b0c354c6ff9
SHA2566902c0adc96f876845598073a6e09cf333b6a16f6f1eb83dd449d3b311eb09ac
SHA512a1bbf0eaf4ac36bd6854e64a02ec895bb1319d986ea00ec2ef658ecabbc660344fd620c8ce3aff946d85b0cd685f6847bbc37d54248a7d06c50c77aa171fe51b
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize344B
MD5968c6c6c57c749ecb7ad1b36e59a8a74
SHA1e293417d4a27a42c8ccf22aa30cab9afc2d12989
SHA2569bb700979324cb395a381d2b0790269e51833450511f163c2ac5d0e126ccbf80
SHA51239844f5f429ddaaaa4d2b78b0a066714165a0b29e8c5a7235516d77ed3931ae473d947ff168bee98e84f2e90a1e1676971ee4049bae942bd79d213d1d83d2be5
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD54eff330e67edfacd75cde8172f830ad4
SHA1eb63a2ff81856f8fc166e83b0039ac0a56e71a3b
SHA2562f2c67460cb660530fd871eb228a1a0a3b90b2648788e48c553716565da0ab6d
SHA512a8263ea8e59969aa0a0fa621fa68a83df3b2695c87ebccfa196c04302f2638828a1d35e7143555a68316b0b4f4b0c55a325906983536602675482fbe360b9641
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Filesize
65KB
MD5ac05d27423a85adc1622c714f2cb6184
SHA1b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA5126d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d
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Filesize
749KB
MD587ba288f14fbf826d4cf061d9f8e72ed
SHA1ec1f877e40b5e8917953e54eb51834a15335aa6e
SHA25656529b359e4c4695a3e290752d61c59ad3327a16574da95ca69a214552241a63
SHA512200457f3c9f1120c6c97df354d7e9898e0a3dfecb6fb771985f9e28adaab29841e03e37e1100b759ae7baf89072859082aa3ddc340a8501396426441f8391f95