Analysis
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max time kernel
143s -
max time network
120s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
26/01/2024, 08:56
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/1916-0-0x00000000044C0000-0x00000000045DB000-memory.dmp family_djvu behavioral1/memory/2604-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2604-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2604-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2604-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2092-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2092-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2092-44-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2092-46-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2092-50-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2092-52-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2092-53-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2092-54-0x0000000000400000-0x0000000000537000-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 2768 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\\04a1f8af-6bfe-4024-8849-9513c06db228\\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 1916 set thread context of 2604 1916 file.exe 28 PID 2560 set thread context of 2092 2560 file.exe 30 -
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 2604 file.exe 2092 file.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 1916 wrote to memory of 2604 1916 file.exe 28 PID 1916 wrote to memory of 2604 1916 file.exe 28 PID 1916 wrote to memory of 2604 1916 file.exe 28 PID 1916 wrote to memory of 2604 1916 file.exe 28 PID 1916 wrote to memory of 2604 1916 file.exe 28 PID 1916 wrote to memory of 2604 1916 file.exe 28 PID 1916 wrote to memory of 2604 1916 file.exe 28 PID 1916 wrote to memory of 2604 1916 file.exe 28 PID 1916 wrote to memory of 2604 1916 file.exe 28 PID 1916 wrote to memory of 2604 1916 file.exe 28 PID 1916 wrote to memory of 2604 1916 file.exe 28 PID 2604 wrote to memory of 2768 2604 file.exe 29 PID 2604 wrote to memory of 2768 2604 file.exe 29 PID 2604 wrote to memory of 2768 2604 file.exe 29 PID 2604 wrote to memory of 2768 2604 file.exe 29 PID 2604 wrote to memory of 2560 2604 file.exe 31 PID 2604 wrote to memory of 2560 2604 file.exe 31 PID 2604 wrote to memory of 2560 2604 file.exe 31 PID 2604 wrote to memory of 2560 2604 file.exe 31 PID 2560 wrote to memory of 2092 2560 file.exe 30 PID 2560 wrote to memory of 2092 2560 file.exe 30 PID 2560 wrote to memory of 2092 2560 file.exe 30 PID 2560 wrote to memory of 2092 2560 file.exe 30 PID 2560 wrote to memory of 2092 2560 file.exe 30 PID 2560 wrote to memory of 2092 2560 file.exe 30 PID 2560 wrote to memory of 2092 2560 file.exe 30 PID 2560 wrote to memory of 2092 2560 file.exe 30 PID 2560 wrote to memory of 2092 2560 file.exe 30 PID 2560 wrote to memory of 2092 2560 file.exe 30 PID 2560 wrote to memory of 2092 2560 file.exe 30
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:1916 -
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:2604 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\04a1f8af-6bfe-4024-8849-9513c06db228" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2768
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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:2560
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask1⤵
- Suspicious behavior: EnumeratesProcesses
PID:2092
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
MD570fa45f789c355370861cbef0a702d58
SHA1177ac2e0478f0419a112ea64d2a5a2001e3f6c5c
SHA25634cf5586d219169c6f5553b362cf6d063ff1ff452d12a3f7c7e84b75aa55c276
SHA5121f359c4ace3ea99addb08ddf26d094f60eb96c1f6eaac6693bde7347bfdb26350b4dcb99a0f185c66bdb2584324247376a2673bd58543d112b1d65a4570efa02
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize344B
MD5f74f1ba1bfac65f3c4177caf89347a45
SHA12060d19c53b6d368ab50f165cde8bafd8106436a
SHA2562eb9269862a924269d912b8d49661c5b5bd2a0d8e697e0bf2633d1a120b8f392
SHA51255a428a988ba1773f4d0b05c64930d0eee56c21bc46f3961ef7109f9b7caf4178240f13c3fb452423a7f84f895d0fa388a18201da12bfea560eebd703dee56f1
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD566e6b0406be6d492671de350d23b0fe0
SHA11eddc26e0effac4acdb29728f97dd2d881904a5f
SHA256c5adaf9acfc6fbc90f4d4325369aa5311d39b68b57b953e3997e89f910689601
SHA512717123c51d0b4ee3f0f8260613be01a00cba303feb4c8863cf83ef4a657e5c44941a4883dddbae8083d771031cca30b1e02d98a26b2246d0abb82383feb1d6f5
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Filesize
749KB
MD587ba288f14fbf826d4cf061d9f8e72ed
SHA1ec1f877e40b5e8917953e54eb51834a15335aa6e
SHA25656529b359e4c4695a3e290752d61c59ad3327a16574da95ca69a214552241a63
SHA512200457f3c9f1120c6c97df354d7e9898e0a3dfecb6fb771985f9e28adaab29841e03e37e1100b759ae7baf89072859082aa3ddc340a8501396426441f8391f95
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Filesize
65KB
MD5ac05d27423a85adc1622c714f2cb6184
SHA1b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA5126d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d