Analysis
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max time kernel
142s -
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
win10v2004-20231222-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/2520-2-0x0000000004440000-0x000000000455B000-memory.dmp family_djvu behavioral1/memory/2536-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2536-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2536-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2536-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2644-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2644-46-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2644-44-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2644-50-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2644-52-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2644-53-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2644-54-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2644-55-0x0000000000400000-0x0000000000537000-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 2140 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\283110e2-13da-4313-ae37-f8d05383b2d4\\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 2520 set thread context of 2536 2520 file.exe 28 PID 2772 set thread context of 2644 2772 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 2536 file.exe 2644 file.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 2520 wrote to memory of 2536 2520 file.exe 28 PID 2520 wrote to memory of 2536 2520 file.exe 28 PID 2520 wrote to memory of 2536 2520 file.exe 28 PID 2520 wrote to memory of 2536 2520 file.exe 28 PID 2520 wrote to memory of 2536 2520 file.exe 28 PID 2520 wrote to memory of 2536 2520 file.exe 28 PID 2520 wrote to memory of 2536 2520 file.exe 28 PID 2520 wrote to memory of 2536 2520 file.exe 28 PID 2520 wrote to memory of 2536 2520 file.exe 28 PID 2520 wrote to memory of 2536 2520 file.exe 28 PID 2520 wrote to memory of 2536 2520 file.exe 28 PID 2536 wrote to memory of 2140 2536 file.exe 29 PID 2536 wrote to memory of 2140 2536 file.exe 29 PID 2536 wrote to memory of 2140 2536 file.exe 29 PID 2536 wrote to memory of 2140 2536 file.exe 29 PID 2536 wrote to memory of 2772 2536 file.exe 30 PID 2536 wrote to memory of 2772 2536 file.exe 30 PID 2536 wrote to memory of 2772 2536 file.exe 30 PID 2536 wrote to memory of 2772 2536 file.exe 30 PID 2772 wrote to memory of 2644 2772 file.exe 31 PID 2772 wrote to memory of 2644 2772 file.exe 31 PID 2772 wrote to memory of 2644 2772 file.exe 31 PID 2772 wrote to memory of 2644 2772 file.exe 31 PID 2772 wrote to memory of 2644 2772 file.exe 31 PID 2772 wrote to memory of 2644 2772 file.exe 31 PID 2772 wrote to memory of 2644 2772 file.exe 31 PID 2772 wrote to memory of 2644 2772 file.exe 31 PID 2772 wrote to memory of 2644 2772 file.exe 31 PID 2772 wrote to memory of 2644 2772 file.exe 31 PID 2772 wrote to memory of 2644 2772 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:2520 -
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:2536 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\283110e2-13da-4313-ae37-f8d05383b2d4" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2140
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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:2772 -
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2644
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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
MD55fa2cc50f14fd05cbc929e5c13cd1d3d
SHA17463d88b4f7619a69642b12e67a4c4d8f955d9aa
SHA2560e73d74530ea4f8451a58c30acd656a059a04ea61f767ac07341ad42b404eedb
SHA512bd8683286bf93cc4220a8f43625160066fd0519c1aed99e0038473d25c1f9be78626c969b9afc703bc892518cddfe3807286db9a1da2d8b78bbfe5d3e2ae059c
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize344B
MD5482f560eb3c8dbdd95d52cc24447f2ac
SHA1d68c28ab63c78015306d1477a246fcb0a8e2757a
SHA256b4a4a2443139eb06325062290c5cbeb9360980490f9548ed5bf778744260e866
SHA5128bfb69cf6d474ab7cbe981320de82102fa2338cc7ba3312d24e0d0c8f0a9f699089c664300205069a7e8e4be0ce3fccd70776e6d69ebea3bfe46344799782926
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD580f04b256567b600b5a2e4f02c7de127
SHA11757e505e2e4f001bebc3bbd6cf6b45a2044e8c9
SHA25611cc124258d60de27e59dfdba41d7f2de9b412f6e94bd56687642accf80e0b99
SHA512f20ac7123c6be06be44bc2b8e1f30df52a63e235215f3e0c006ad4641eb81b22d8a33f1c8fdeb57db090ba04b20b788e5448e3d237392341c2a4386899a0fb63
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Filesize
749KB
MD587ba288f14fbf826d4cf061d9f8e72ed
SHA1ec1f877e40b5e8917953e54eb51834a15335aa6e
SHA25656529b359e4c4695a3e290752d61c59ad3327a16574da95ca69a214552241a63
SHA512200457f3c9f1120c6c97df354d7e9898e0a3dfecb6fb771985f9e28adaab29841e03e37e1100b759ae7baf89072859082aa3ddc340a8501396426441f8391f95
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Filesize
65KB
MD5ac05d27423a85adc1622c714f2cb6184
SHA1b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA5126d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d