Analysis
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max time kernel
141s -
max time network
123s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-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 13 IoCs
resource yara_rule behavioral1/memory/1948-0-0x0000000004360000-0x000000000447B000-memory.dmp family_djvu behavioral1/memory/2340-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2340-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2340-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2556-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2556-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2340-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2556-46-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2556-44-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2556-52-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2556-53-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2556-50-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2556-54-0x0000000000400000-0x0000000000537000-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 3036 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\\fa5744ef-f1e6-4b85-a51b-a5124ea13e9b\\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 3 api.2ip.ua 4 api.2ip.ua 9 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 1948 set thread context of 2340 1948 395590.exe 14 PID 2692 set thread context of 2556 2692 395590.exe 29 -
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 2340 395590.exe 2340 395590.exe 2556 395590.exe 2556 395590.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 1948 wrote to memory of 2340 1948 395590.exe 14 PID 1948 wrote to memory of 2340 1948 395590.exe 14 PID 1948 wrote to memory of 2340 1948 395590.exe 14 PID 1948 wrote to memory of 2340 1948 395590.exe 14 PID 1948 wrote to memory of 2340 1948 395590.exe 14 PID 1948 wrote to memory of 2340 1948 395590.exe 14 PID 1948 wrote to memory of 2340 1948 395590.exe 14 PID 1948 wrote to memory of 2340 1948 395590.exe 14 PID 1948 wrote to memory of 2340 1948 395590.exe 14 PID 1948 wrote to memory of 2340 1948 395590.exe 14 PID 1948 wrote to memory of 2340 1948 395590.exe 14 PID 2340 wrote to memory of 3036 2340 395590.exe 26 PID 2340 wrote to memory of 3036 2340 395590.exe 26 PID 2340 wrote to memory of 3036 2340 395590.exe 26 PID 2340 wrote to memory of 3036 2340 395590.exe 26 PID 2340 wrote to memory of 2692 2340 395590.exe 28 PID 2340 wrote to memory of 2692 2340 395590.exe 28 PID 2340 wrote to memory of 2692 2340 395590.exe 28 PID 2340 wrote to memory of 2692 2340 395590.exe 28 PID 2692 wrote to memory of 2556 2692 395590.exe 29 PID 2692 wrote to memory of 2556 2692 395590.exe 29 PID 2692 wrote to memory of 2556 2692 395590.exe 29 PID 2692 wrote to memory of 2556 2692 395590.exe 29 PID 2692 wrote to memory of 2556 2692 395590.exe 29 PID 2692 wrote to memory of 2556 2692 395590.exe 29 PID 2692 wrote to memory of 2556 2692 395590.exe 29 PID 2692 wrote to memory of 2556 2692 395590.exe 29 PID 2692 wrote to memory of 2556 2692 395590.exe 29 PID 2692 wrote to memory of 2556 2692 395590.exe 29 PID 2692 wrote to memory of 2556 2692 395590.exe 29
Processes
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C:\Users\Admin\AppData\Local\Temp\395590.exe"C:\Users\Admin\AppData\Local\Temp\395590.exe"1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2340 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\fa5744ef-f1e6-4b85-a51b-a5124ea13e9b" /deny *S-1-1-0:(OI)(CI)(DE,DC)2⤵
- Modifies file permissions
PID:3036
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C:\Users\Admin\AppData\Local\Temp\395590.exe"C:\Users\Admin\AppData\Local\Temp\395590.exe" --Admin IsNotAutoStart IsNotTask2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2692 -
C:\Users\Admin\AppData\Local\Temp\395590.exe"C:\Users\Admin\AppData\Local\Temp\395590.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious behavior: EnumeratesProcesses
PID:2556
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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:1948
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
MD58afa83e248131a40ab5488f063a5fba0
SHA19f5289cde6ceb742ef8ff9d885ee5e78e482e85b
SHA2565a9bb8132017e7fefd93921830da9e89f2947386c5534356f4036b5e8ca4aa61
SHA512b43c20428aec4803d83537978d3b3f86ca225f09a3e84f16c0d1be0d341ad57c8fe221e6017eedb4d866bc7816a6b4618a952815578a43e6c73f1b76d5f87f77
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize344B
MD55cd9580919262d54c0b9527dfaacc8a8
SHA1d22afc7fc2409beef416def6b4272064a34ae03f
SHA25680cfebff580c055854c7f6bf75050e4ab6d130012e0dc9278bb0d532420066e3
SHA5121d393e8dcffc219d00caf6e3a6ac349fd93fb2e210dd087bf6d5ec532826753510d123a84f15cc7aba622c03b6b86383e738b35dc9e041963282ae98cb075cdb
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD59d70d03b49202728c6006bb3f8e708f4
SHA1cbce816abb92923e90a1f09dab764974bf978832
SHA25624141c4938503ed6d8fc131d39be87fc95e4a6e1a24518a712e556f15356a6b6
SHA5129c22fd47ae27a7fc3673a7f2eae0eabbe3fb30df10cca4967552715763128a0fc9365a377e68f2e855ed5670dfb66392e6ad8ca4cfcf7ab1128eec035904df90
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Filesize
65KB
MD5ac05d27423a85adc1622c714f2cb6184
SHA1b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA5126d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d
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Filesize
106KB
MD57f26953f4b3b212dfc64af7cd428e45e
SHA14db48a550b19341dfeeec94d45620033146cd6e7
SHA256e7669c6094ee134e27ab00decdda06061024f3ab6a01c1c8d9dcd6b6a1cc1d0e
SHA512e8e98fa59d66de64e876b42a099c8b41b9f145902e009bcc982789135dbca3f45271e303c9281639d255854f4edf3b4452949addcea0e4ce15982fc2f72a5ef1