Analysis
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max time kernel
144s -
max time network
151s -
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, 10:51
Static task
static1
Behavioral task
behavioral1
Sample
395590.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
395590.exe
Resource
win10v2004-20231215-en
General
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Target
395590.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 16 IoCs
resource yara_rule behavioral2/memory/1184-0-0x0000000004930000-0x0000000004A4B000-memory.dmp family_djvu behavioral2/memory/3016-1-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3016-2-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3016-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3016-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3016-15-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4900-18-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4900-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4900-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4900-25-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4900-26-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4900-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4900-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4900-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4900-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4900-36-0x0000000000400000-0x0000000000537000-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-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation 395590.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 2724 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-983843758-932321429-1636175382-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e2f0fa20-9d24-4108-b21f-e6500974ea3c\\395590.exe\" --AutoStart" 395590.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 4 api.2ip.ua 5 api.2ip.ua 18 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 1184 set thread context of 3016 1184 395590.exe 85 PID 2904 set thread context of 4900 2904 395590.exe 93 -
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 3016 395590.exe 3016 395590.exe 4900 395590.exe 4900 395590.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 1184 wrote to memory of 3016 1184 395590.exe 85 PID 1184 wrote to memory of 3016 1184 395590.exe 85 PID 1184 wrote to memory of 3016 1184 395590.exe 85 PID 1184 wrote to memory of 3016 1184 395590.exe 85 PID 1184 wrote to memory of 3016 1184 395590.exe 85 PID 1184 wrote to memory of 3016 1184 395590.exe 85 PID 1184 wrote to memory of 3016 1184 395590.exe 85 PID 1184 wrote to memory of 3016 1184 395590.exe 85 PID 1184 wrote to memory of 3016 1184 395590.exe 85 PID 1184 wrote to memory of 3016 1184 395590.exe 85 PID 3016 wrote to memory of 2724 3016 395590.exe 89 PID 3016 wrote to memory of 2724 3016 395590.exe 89 PID 3016 wrote to memory of 2724 3016 395590.exe 89 PID 3016 wrote to memory of 2904 3016 395590.exe 91 PID 3016 wrote to memory of 2904 3016 395590.exe 91 PID 3016 wrote to memory of 2904 3016 395590.exe 91 PID 2904 wrote to memory of 4900 2904 395590.exe 93 PID 2904 wrote to memory of 4900 2904 395590.exe 93 PID 2904 wrote to memory of 4900 2904 395590.exe 93 PID 2904 wrote to memory of 4900 2904 395590.exe 93 PID 2904 wrote to memory of 4900 2904 395590.exe 93 PID 2904 wrote to memory of 4900 2904 395590.exe 93 PID 2904 wrote to memory of 4900 2904 395590.exe 93 PID 2904 wrote to memory of 4900 2904 395590.exe 93 PID 2904 wrote to memory of 4900 2904 395590.exe 93 PID 2904 wrote to memory of 4900 2904 395590.exe 93
Processes
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C:\Users\Admin\AppData\Local\Temp\395590.exe"C:\Users\Admin\AppData\Local\Temp\395590.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1184 -
C:\Users\Admin\AppData\Local\Temp\395590.exe"C:\Users\Admin\AppData\Local\Temp\395590.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3016 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\e2f0fa20-9d24-4108-b21f-e6500974ea3c" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2724
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C:\Users\Admin\AppData\Local\Temp\395590.exe"C:\Users\Admin\AppData\Local\Temp\395590.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2904 -
C:\Users\Admin\AppData\Local\Temp\395590.exe"C:\Users\Admin\AppData\Local\Temp\395590.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4900
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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
MD5ebef9ccf096d3614ff1270f8029f5359
SHA12b35a06f2a57f9d27e4cfbbb9fe9fdb1fb8eb8a3
SHA2562c4d862f0abc595d9968f1a4913add1c99c19ac21c148c56f8735442b2ed66c4
SHA512c120c56e4ea4b161c36339872e78798e8fd71e42bd71f114b95f81ad7d24efdc35bfbaf753df935dd307fa879c09e743c1fdd8b534f1b8e41c988226325b1b57
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5d94e2062fcbe13fa11261760dbbcd2f9
SHA1d264472565eef91e858fc08cece6f36e540e3c83
SHA25609cb5151b21ba656d11e8434aa28472ee1a50384d414a32db4702943383a9c41
SHA51231793548d4f3c9c2a6c4d3f0a36a69977a157244a08947d7171e8ba231b1c04d3d3c85fe7d5e54286ee2ccc29a5850852d0738a0711a860eae3bb1a69576b000
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Filesize
749KB
MD587ba288f14fbf826d4cf061d9f8e72ed
SHA1ec1f877e40b5e8917953e54eb51834a15335aa6e
SHA25656529b359e4c4695a3e290752d61c59ad3327a16574da95ca69a214552241a63
SHA512200457f3c9f1120c6c97df354d7e9898e0a3dfecb6fb771985f9e28adaab29841e03e37e1100b759ae7baf89072859082aa3ddc340a8501396426441f8391f95