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Analysis
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max time kernel
142s -
max time network
123s -
platform
windows11-21h2_x64 -
resource
win11-20240412-en -
resource tags
arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system -
submitted
26/04/2024, 05:00
Static task
static1
Behavioral task
behavioral1
Sample
589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral2
Sample
589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe
Resource
win11-20240412-en
General
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Target
589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe
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Size
760KB
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MD5
b15ef523248fef029925a13e734f0d6a
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SHA1
d10b5c36d35a5b1f381a75c9f70e4e54e13a9adb
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SHA256
589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd
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SHA512
7444089d471faabc7252497eca92116ffa16a7bf863f44f24efda386f43fdab91361ddcb0f8dacf28cd697d70c08e68ebe062b68f066991f0c07e20c43c8da7a
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SSDEEP
12288:VXTQb18sh8zXGklrAtTuMdp0ttYKHypYHy9EbRc0YQkQCA+taC+Y6JbOp5soSyB4:Vy8sh8zXVlrQTukIY930go+ECLp5soSH
Malware Config
Extracted
djvu
http://cajgtus.com/test1/get.php
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extension
.bgjs
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offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://cajgtus.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 17 IoCs
resource yara_rule behavioral2/memory/4884-2-0x0000000005F90000-0x00000000060AB000-memory.dmp family_djvu behavioral2/memory/4760-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4760-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4760-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4760-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4760-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2480-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2480-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2480-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2480-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2480-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2480-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2480-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2480-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2480-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2480-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2480-39-0x0000000000400000-0x0000000000537000-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 3524 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-801765966-3955847401-2235691403-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4c089b8a-2ed0-4708-bf54-8a1b8deea7f9\\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe\" --AutoStart" 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.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 1 api.2ip.ua 2 api.2ip.ua 7 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 4884 set thread context of 4760 4884 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 78 PID 3904 set thread context of 2480 3904 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 85 -
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 4760 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 4760 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 2480 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 2480 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 4884 wrote to memory of 4760 4884 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 78 PID 4884 wrote to memory of 4760 4884 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 78 PID 4884 wrote to memory of 4760 4884 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 78 PID 4884 wrote to memory of 4760 4884 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 78 PID 4884 wrote to memory of 4760 4884 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 78 PID 4884 wrote to memory of 4760 4884 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 78 PID 4884 wrote to memory of 4760 4884 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 78 PID 4884 wrote to memory of 4760 4884 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 78 PID 4884 wrote to memory of 4760 4884 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 78 PID 4884 wrote to memory of 4760 4884 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 78 PID 4760 wrote to memory of 3524 4760 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 80 PID 4760 wrote to memory of 3524 4760 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 80 PID 4760 wrote to memory of 3524 4760 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 80 PID 4760 wrote to memory of 3904 4760 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 82 PID 4760 wrote to memory of 3904 4760 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 82 PID 4760 wrote to memory of 3904 4760 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 82 PID 3904 wrote to memory of 2480 3904 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 85 PID 3904 wrote to memory of 2480 3904 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 85 PID 3904 wrote to memory of 2480 3904 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 85 PID 3904 wrote to memory of 2480 3904 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 85 PID 3904 wrote to memory of 2480 3904 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 85 PID 3904 wrote to memory of 2480 3904 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 85 PID 3904 wrote to memory of 2480 3904 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 85 PID 3904 wrote to memory of 2480 3904 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 85 PID 3904 wrote to memory of 2480 3904 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 85 PID 3904 wrote to memory of 2480 3904 589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe"C:\Users\Admin\AppData\Local\Temp\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4884 -
C:\Users\Admin\AppData\Local\Temp\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe"C:\Users\Admin\AppData\Local\Temp\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4760 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\4c089b8a-2ed0-4708-bf54-8a1b8deea7f9" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3524
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C:\Users\Admin\AppData\Local\Temp\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe"C:\Users\Admin\AppData\Local\Temp\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3904 -
C:\Users\Admin\AppData\Local\Temp\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe"C:\Users\Admin\AppData\Local\Temp\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2480
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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
MD526f403621df973e369b7b13c6aba9ccb
SHA1ca3e85e908d9532f384c0560797f4e379bd4a0a0
SHA2560e9d6e111822d17e4c57df845d4fdacc5477adec069db8eecd3be0d11fc84533
SHA512d5bfab31e8c913cd97b83d92c56e58a3c225975537006b42124cb1cf4e813c635c30d6aa5010ecec54c1e8fa9eeb44c93f2b955216e7509dd79f1e074e340225
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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
MD550c055f07195b37b5e0cde7742a3e79f
SHA1cda7cd037851075bc004f3ad6ad6008f7419a08c
SHA2562ebfdccc1ba9d3f2fbf2055f6ab245e776b2c99d72ee4d672175ba1e64d30e5e
SHA51263ababe2cfdc4612e115c97f47df1ea600e050baffd2c21e31cd19f206d38e3fb5c2c56edcf5cd74346756747e3783f8f53da500d25a4ad3ef7fd349a78622b3
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5de639dc9313a6992c5f7daaba479998c
SHA1adeff986ee38ffd311845ff2f09a46216f9b3496
SHA256142c52c4da8179a686db1aa72bbff96554ba50c876b6c73e72533fd0ecd13cb4
SHA51299498a42ebfef850cc8670dc7d8150361871ac6b23d506349c5b3771ddb7147f0580b9004dbb9e1c857e2c82058add494ad34ced17a68ecc631fc33e31f18cbc
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C:\Users\Admin\AppData\Local\4c089b8a-2ed0-4708-bf54-8a1b8deea7f9\589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd.exe
Filesize760KB
MD5b15ef523248fef029925a13e734f0d6a
SHA1d10b5c36d35a5b1f381a75c9f70e4e54e13a9adb
SHA256589085df62271df850294b9d599ab97bf57a7ecce2cd8c91e9dbc627a472e8fd
SHA5127444089d471faabc7252497eca92116ffa16a7bf863f44f24efda386f43fdab91361ddcb0f8dacf28cd697d70c08e68ebe062b68f066991f0c07e20c43c8da7a