Analysis
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max time kernel
145s -
max time network
144s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
09/04/2024, 05:47
Static task
static1
Behavioral task
behavioral1
Sample
f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral2
Sample
f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe
Resource
win11-20240221-en
General
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Target
f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe
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Size
771KB
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MD5
1be477c579869b30cd8f9ec09e2611b3
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SHA1
897d59324c868c1d194dd0107212d119b15aa76a
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SHA256
f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56
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SHA512
23236d3b8f3452155496e9097aad21c9b9f9c06a1379a1cb819445d265b21a1cb2f859f5672c6e3e57e7ac7fef6b0ab25271e47202582b2f3c43a39d27e6c4df
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SSDEEP
12288:r+c8FbuiWKbuolBBIxEon4AdBCYg1CONb/2k04NrQwLJw9JM1y4V7vlci7i:sWKbLBoEon4AuCOti7SJOCy4dvlde
Malware Config
Extracted
djvu
http://sajdfue.com/test1/get.php
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extension
.uajs
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offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://sajdfue.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 18 IoCs
resource yara_rule behavioral1/memory/3844-2-0x0000000004B90000-0x0000000004CAB000-memory.dmp family_djvu behavioral1/memory/2992-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2992-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2992-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2992-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2992-16-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3848-19-0x00000000048E0000-0x0000000004977000-memory.dmp family_djvu behavioral1/memory/3524-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3524-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3524-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3524-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3524-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3524-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3524-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3524-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3524-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3524-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3524-37-0x0000000000400000-0x0000000000537000-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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 1580 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\6c6f50c6-94dc-43f9-82d4-078781cb920c\\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe\" --AutoStart" f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.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 18 api.2ip.ua 5 api.2ip.ua 6 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 3844 set thread context of 2992 3844 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 93 PID 3848 set thread context of 3524 3848 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 99 -
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 2992 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 2992 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 3524 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 3524 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 3844 wrote to memory of 2992 3844 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 93 PID 3844 wrote to memory of 2992 3844 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 93 PID 3844 wrote to memory of 2992 3844 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 93 PID 3844 wrote to memory of 2992 3844 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 93 PID 3844 wrote to memory of 2992 3844 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 93 PID 3844 wrote to memory of 2992 3844 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 93 PID 3844 wrote to memory of 2992 3844 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 93 PID 3844 wrote to memory of 2992 3844 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 93 PID 3844 wrote to memory of 2992 3844 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 93 PID 3844 wrote to memory of 2992 3844 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 93 PID 2992 wrote to memory of 1580 2992 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 96 PID 2992 wrote to memory of 1580 2992 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 96 PID 2992 wrote to memory of 1580 2992 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 96 PID 2992 wrote to memory of 3848 2992 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 97 PID 2992 wrote to memory of 3848 2992 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 97 PID 2992 wrote to memory of 3848 2992 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 97 PID 3848 wrote to memory of 3524 3848 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 99 PID 3848 wrote to memory of 3524 3848 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 99 PID 3848 wrote to memory of 3524 3848 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 99 PID 3848 wrote to memory of 3524 3848 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 99 PID 3848 wrote to memory of 3524 3848 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 99 PID 3848 wrote to memory of 3524 3848 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 99 PID 3848 wrote to memory of 3524 3848 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 99 PID 3848 wrote to memory of 3524 3848 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 99 PID 3848 wrote to memory of 3524 3848 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 99 PID 3848 wrote to memory of 3524 3848 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 99
Processes
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C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe"C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3844 -
C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe"C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2992 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\6c6f50c6-94dc-43f9-82d4-078781cb920c" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1580
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C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe"C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3848 -
C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe"C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3524
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4100 --field-trial-handle=2272,i,1589057049575649654,2929151440327217574,262144 --variations-seed-version /prefetch:81⤵PID:5052
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
MD5580071ebd24cccfd9268e1474bb8134e
SHA1443665efe7009fe1d4c5bc4786dc9cc540e59ef6
SHA25653e3fd53196b53d23b724612cf2704518edf3e979dca02f5674ac419b5f7b461
SHA51213d52455d8a30a0af06c420cd01f13f55efc4c55b59883c5208bf4929352e7b783557bff6a157c4fc71a8e7cbfadf00d55eef8ebef4b984624d8feb116a960a4
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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
MD5bf6f6f176423b09787a1873bf23c274c
SHA1dbccaba0f8aaf8fbcdce68be95a448c37e2c0862
SHA2568511fa724d5a671de9d9363db135c9c98acaa7f43a68559d838f33f1d53050f5
SHA51211e04ad8ba3298e5b8f640abe4b7aa2286f6a6975e90cfee9513ec62bc325636ed92ec61a36a33bd071b9481bd0e45b2c995046c1e911088b6a331bedd132465
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD532d86da12646fec4aceda05749f4808c
SHA174e7ed910d4c9653b3f8b1b9ce3aedbeee9e0057
SHA256830b2742a3eb075ce0db0606bed617989cc0669311acaac0c2380ae208f01d23
SHA5123267901e354f724071fad18e79ef3d6231f6b31f7da4350c1205a7bcf6db82aa60a339a8156bba128dfe39ba456b375061f84dce05fc18e2cf01860f51588d7f
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C:\Users\Admin\AppData\Local\6c6f50c6-94dc-43f9-82d4-078781cb920c\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe
Filesize771KB
MD51be477c579869b30cd8f9ec09e2611b3
SHA1897d59324c868c1d194dd0107212d119b15aa76a
SHA256f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56
SHA51223236d3b8f3452155496e9097aad21c9b9f9c06a1379a1cb819445d265b21a1cb2f859f5672c6e3e57e7ac7fef6b0ab25271e47202582b2f3c43a39d27e6c4df