Analysis
- max time kernel
150s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system - submitted
15/03/2024, 22:38
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
file.exe
Resource
win10v2004-20240226-en
General
- Target file.exe
- Size 222KB
- Sample240315-2kcxpsef29
- SHA256 50c5fa2b2078b52d54657e174f05dcc98bd3e409eeef19baf60b65f041bfe5d2
- MD5 9c1da8b1d3b039cb60be5a47ef2889c5
- SHA1 a759a61d392c040fae148756d15bdb625899491a
- SHA512 e46c01f7afc420e682138523386434cd256ddfeee306d287833ee0570db0c9729aada175454c96fe700b3cba7f004399eb99011b32f47d6cad3e22fc95a80241
- SSDEEP 3072:mkAodp8N/dorgUDXqlo3+/PU3FhyIY2JOmUH3hR6TbML1P4kAu8TMGz5:mkAoj8N/+xXt+/83+lH3hKAL1ZAuwnF
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Extracted
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smokeloader
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pub1
Extracted
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smokeloader
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2022
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http://trad-einmyus.com/index.php
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http://tradein-myus.com/index.php
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http://trade-inmyus.com/index.php
Extracted
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djvu
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http://sajdfue.com/test1/get.php
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extension
.wisz
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offline_id
4p0Nzrg1q0ND5of5Gtp2UBjthSXuE8VxnMrd4vt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://sajdfue.com/files/1/build3.exe
-
ransomnote
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Extracted
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lumma
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https://colorfulequalugliess.shop/api
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https://resergvearyinitiani.shop/api
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https://associationokeo.shop/api
Signatures
- Detected Djvu ransomware 9 IoCs
resource yara_rule behavioral2/memory/520-21-0x00000000021B0000-0x00000000022CB000-memory.dmp family_djvu behavioral2/memory/4760-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4760-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4760-25-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4760-26-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4760-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1068-44-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1068-45-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1068-47-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu - Djvu Ransomware
Ransomware which is a variant of the STOP family.
- SmokeLoader
Modular backdoor trojan in use since 2014.
- Downloads MZ/PE file
- 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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation 3FD4.exe - Deletes itself 1 IoCs
pid Process 3428 Process not Found - Executes dropped EXE 8 IoCs
pid Process 520 3FD4.exe 4760 3FD4.exe 5072 3FD4.exe 1068 3FD4.exe 2704 6A31.exe 3592 uueeheu 4156 3BAB.exe 5052 71E0.exe - Modifies file permissions 1 TTPs 1 IoCs
pid Process 3580 icacls.exe - Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\7cee065a-6582-4625-8c52-20ad3579d608\\3FD4.exe\" --AutoStart" 3FD4.exe - Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 112 api.2ip.ua 113 api.2ip.ua - Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 520 set thread context of 4760 520 3FD4.exe 107 PID 5072 set thread context of 1068 5072 3FD4.exe 111 PID 2704 set thread context of 2872 2704 6A31.exe 119 - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 4 IoCs
pid pid_target Process procid_target 1004 1068 WerFault.exe 111 4672 2872 WerFault.exe 119 1208 2872 WerFault.exe 119 2372 4156 WerFault.exe 132 - Checks SCSI registry key(s) 3 TTPs 6 IoCs
SCSI information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI uueeheu Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI uueeheu Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI uueeheu Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI file.exe Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI file.exe Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI file.exe - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 4756 file.exe 4756 file.exe 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found 3428 Process not Found - Suspicious behavior: MapViewOfSection 2 IoCs
pid Process 4756 file.exe 3592 uueeheu - Suspicious use of AdjustPrivilegeToken 22 IoCs
description pid Process Token: SeShutdownPrivilege 3428 Process not Found Token: SeCreatePagefilePrivilege 3428 Process not Found Token: SeShutdownPrivilege 3428 Process not Found Token: SeCreatePagefilePrivilege 3428 Process not Found Token: SeShutdownPrivilege 3428 Process not Found Token: SeCreatePagefilePrivilege 3428 Process not Found Token: SeShutdownPrivilege 3428 Process not Found Token: SeCreatePagefilePrivilege 3428 Process not Found Token: SeShutdownPrivilege 3428 Process not Found Token: SeCreatePagefilePrivilege 3428 Process not Found Token: SeShutdownPrivilege 3428 Process not Found Token: SeCreatePagefilePrivilege 3428 Process not Found Token: SeShutdownPrivilege 3428 Process not Found Token: SeCreatePagefilePrivilege 3428 Process not Found Token: SeShutdownPrivilege 3428 Process not Found Token: SeCreatePagefilePrivilege 3428 Process not Found Token: SeShutdownPrivilege 3428 Process not Found Token: SeCreatePagefilePrivilege 3428 Process not Found Token: SeShutdownPrivilege 3428 Process not Found Token: SeCreatePagefilePrivilege 3428 Process not Found Token: SeShutdownPrivilege 3428 Process not Found Token: SeCreatePagefilePrivilege 3428 Process not Found - Suspicious use of UnmapMainImage 1 IoCs
pid Process 3428 Process not Found - Suspicious use of WriteProcessMemory 57 IoCs
description pid Process procid_target PID 3428 wrote to memory of 2184 3428 Process not Found 101 PID 3428 wrote to memory of 2184 3428 Process not Found 101 PID 2184 wrote to memory of 968 2184 cmd.exe 103 PID 2184 wrote to memory of 968 2184 cmd.exe 103 PID 3428 wrote to memory of 520 3428 Process not Found 106 PID 3428 wrote to memory of 520 3428 Process not Found 106 PID 3428 wrote to memory of 520 3428 Process not Found 106 PID 520 wrote to memory of 4760 520 3FD4.exe 107 PID 520 wrote to memory of 4760 520 3FD4.exe 107 PID 520 wrote to memory of 4760 520 3FD4.exe 107 PID 520 wrote to memory of 4760 520 3FD4.exe 107 PID 520 wrote to memory of 4760 520 3FD4.exe 107 PID 520 wrote to memory of 4760 520 3FD4.exe 107 PID 520 wrote to memory of 4760 520 3FD4.exe 107 PID 520 wrote to memory of 4760 520 3FD4.exe 107 PID 520 wrote to memory of 4760 520 3FD4.exe 107 PID 520 wrote to memory of 4760 520 3FD4.exe 107 PID 4760 wrote to memory of 3580 4760 3FD4.exe 108 PID 4760 wrote to memory of 3580 4760 3FD4.exe 108 PID 4760 wrote to memory of 3580 4760 3FD4.exe 108 PID 4760 wrote to memory of 5072 4760 3FD4.exe 109 PID 4760 wrote to memory of 5072 4760 3FD4.exe 109 PID 4760 wrote to memory of 5072 4760 3FD4.exe 109 PID 5072 wrote to memory of 1068 5072 3FD4.exe 111 PID 5072 wrote to memory of 1068 5072 3FD4.exe 111 PID 5072 wrote to memory of 1068 5072 3FD4.exe 111 PID 5072 wrote to memory of 1068 5072 3FD4.exe 111 PID 5072 wrote to memory of 1068 5072 3FD4.exe 111 PID 5072 wrote to memory of 1068 5072 3FD4.exe 111 PID 5072 wrote to memory of 1068 5072 3FD4.exe 111 PID 5072 wrote to memory of 1068 5072 3FD4.exe 111 PID 5072 wrote to memory of 1068 5072 3FD4.exe 111 PID 5072 wrote to memory of 1068 5072 3FD4.exe 111 PID 3428 wrote to memory of 2704 3428 Process not Found 116 PID 3428 wrote to memory of 2704 3428 Process not Found 116 PID 3428 wrote to memory of 2704 3428 Process not Found 116 PID 2704 wrote to memory of 4124 2704 6A31.exe 118 PID 2704 wrote to memory of 4124 2704 6A31.exe 118 PID 2704 wrote to memory of 4124 2704 6A31.exe 118 PID 2704 wrote to memory of 2872 2704 6A31.exe 119 PID 2704 wrote to memory of 2872 2704 6A31.exe 119 PID 2704 wrote to memory of 2872 2704 6A31.exe 119 PID 2704 wrote to memory of 2872 2704 6A31.exe 119 PID 2704 wrote to memory of 2872 2704 6A31.exe 119 PID 2704 wrote to memory of 2872 2704 6A31.exe 119 PID 2704 wrote to memory of 2872 2704 6A31.exe 119 PID 2704 wrote to memory of 2872 2704 6A31.exe 119 PID 2704 wrote to memory of 2872 2704 6A31.exe 119 PID 3428 wrote to memory of 4156 3428 Process not Found 132 PID 3428 wrote to memory of 4156 3428 Process not Found 132 PID 3428 wrote to memory of 4156 3428 Process not Found 132 PID 3428 wrote to memory of 1704 3428 Process not Found 133 PID 3428 wrote to memory of 1704 3428 Process not Found 133 PID 1704 wrote to memory of 848 1704 cmd.exe 135 PID 1704 wrote to memory of 848 1704 cmd.exe 135 PID 3428 wrote to memory of 5052 3428 Process not Found 138 PID 3428 wrote to memory of 5052 3428 Process not Found 138 - Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:4756
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\CB7E.bat" "1⤵
- Suspicious use of WriteProcessMemory
PID:2184 -
C:\Windows\system32\reg.exereg add "HKEY_CURRENT_USER\Software\clicker\key" /v primary /t REG_DWORD /d 12⤵PID:968
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C:\Users\Admin\AppData\Local\Temp\3FD4.exeC:\Users\Admin\AppData\Local\Temp\3FD4.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:520 -
C:\Users\Admin\AppData\Local\Temp\3FD4.exeC:\Users\Admin\AppData\Local\Temp\3FD4.exe2⤵
- Checks computer location settings
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4760 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\7cee065a-6582-4625-8c52-20ad3579d608" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3580
-
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C:\Users\Admin\AppData\Local\Temp\3FD4.exe"C:\Users\Admin\AppData\Local\Temp\3FD4.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5072 -
C:\Users\Admin\AppData\Local\Temp\3FD4.exe"C:\Users\Admin\AppData\Local\Temp\3FD4.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
PID:1068 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1068 -s 5685⤵
- Program crash
PID:1004
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1068 -ip 10681⤵PID:4408
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C:\Users\Admin\AppData\Local\Temp\6A31.exeC:\Users\Admin\AppData\Local\Temp\6A31.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2704 -
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"2⤵PID:4124
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"2⤵PID:2872
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2872 -s 8483⤵
- Program crash
PID:4672
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2872 -s 12283⤵
- Program crash
PID:1208
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 364 -p 2872 -ip 28721⤵PID:1232
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2872 -ip 28721⤵PID:5080
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C:\Users\Admin\AppData\Roaming\uueeheuC:\Users\Admin\AppData\Roaming\uueeheu1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
PID:3592
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C:\Users\Admin\AppData\Local\Temp\3BAB.exeC:\Users\Admin\AppData\Local\Temp\3BAB.exe1⤵
- Executes dropped EXE
PID:4156 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4156 -s 11922⤵
- Program crash
PID:2372
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\49A6.bat" "1⤵
- Suspicious use of WriteProcessMemory
PID:1704 -
C:\Windows\system32\reg.exereg add "HKEY_CURRENT_USER\Software\clicker\key" /v primary /t REG_DWORD /d 12⤵PID:848
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 4156 -ip 41561⤵PID:1356
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C:\Users\Admin\AppData\Local\Temp\71E0.exeC:\Users\Admin\AppData\Local\Temp\71E0.exe1⤵
- Executes dropped EXE
PID:5052
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\3BAB.exe
- Size 6.5MB
- SHA256 4a40f9d491f09521f4b0c6076a0eb488f6d8e1cf4b67aa6569c2ccce13556443
- MD5 9e52aa572f0afc888c098db4c0f687ff
- SHA1 ef7c2bb222e69ad0e10c8686eb03dcbee7933c2b
- SHA512 d0991e682ae8c954721e905753b56c01f91b85313beb9996331793c3efa8acc13d574ef5ba44853ecc3e05822931ed655bad1924fa11b774a43e015f42185f62
- SSDEEP 196608:IzDAdubIHCIWMzkHJAYR7rn7/A29DNd4TWf/f+mnK:IzMd2mCIVzkHHf029DwWXfbK
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\3FD4.exe
- Size 750KB
- SHA256 d0b7d65ab265def9f3bccc7c84f7517b8083378bc810fd3f4e8c9743daa87fce
- MD5 1c6abe78bc0883f0f2a5031c2c6e04b7
- SHA1 f5c5f506aea041d0979ecc5bc1efdbe86213eb82
- SHA512 946c09da07f79438395cbd13bd309193eebb16c992e98ccdc3cc56ba143ecc6624dc5402ebd25a577a38430540483c2be530f361e041e27d174eb8bb61064bcc
- SSDEEP 12288:Gahc5QQAYW2dmNCxak3pMtkuJZKSevqbNoIbAz0vH4sfsuFz55iPavcPGuAHwn:hO5pxv5N3GtkMhZb94sRFbi4cux
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\6A31.exe
- Size 340KB
- SHA256 6ce17d2c1c4694f9e33980a51e6384ac4426fe7eb74dbe0e42f3977e588a190f
- MD5 1de3cec15d8d252de6a6aa8fd009ae9c
- SHA1 89660bf133de097b345894dd3278e76c98eb8f89
- SHA512 2fc2d06e488973c03a46558c6067744a902b5770f9ce1c1415ca3dd28d258b40c0a3efc28f0b993e4e3e4380134a140faa792022b3db7c3c5b72974b039e13dd
- SSDEEP 6144:TXAlN8inhlZ/eLZQ/4jtkg0OuQplLeqpiOWWIisRHLvLSspKmO:UfZWLZo2KQnLeqkjWXsRTLSshO
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\71E0.exe
- Size 11.8MB
- SHA256 d2eacbc922f248856b860aa7c31476ae4123f97e82cf69760ef216d9dca321f0
- MD5 450039a02217c53bd983eaf1fd34505a
- SHA1 930ed58a2f58ca7bf3e39aaee43fb541f1c6eeda
- SHA512 cf37a82ea7b64f4633ac82c73feff3f829dda279a7caeac32a4cde7b0f82a43b37f67e620677a87d2eccc0eee6f8d68d0175a086487b2174b4f30b66aa4fb080
- SSDEEP 98304:KCct2UGzXwi3sUsrgbIk7AWIo0tvbxzVE9+Lu6z+MswbCxn6sZ7YxcCd5H5Cd1mr:KYXwi3sUsrFk79I/bxK9OXN
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\CB7E.bat
- Size 77B
- SHA256 d6cceb3c71b80403364bf142f2fa4624ee0be36a49bac25ed45a497cf1ce9c3a
- MD5 55cc761bf3429324e5a0095cab002113
- SHA1 2cc1ef4542a4e92d4158ab3978425d517fafd16d
- SHA512 33f9f5cad22d291077787c7df510806e4ac31f453d288712595af6debe579fabed6cdf4662e46e6fa94de135b161e739f55cfae05c36c87af85ed6a6ad1c9155
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\Roaming\uueeheu
- Size 222KB
- SHA256 50c5fa2b2078b52d54657e174f05dcc98bd3e409eeef19baf60b65f041bfe5d2
- MD5 9c1da8b1d3b039cb60be5a47ef2889c5
- SHA1 a759a61d392c040fae148756d15bdb625899491a
- SHA512 e46c01f7afc420e682138523386434cd256ddfeee306d287833ee0570db0c9729aada175454c96fe700b3cba7f004399eb99011b32f47d6cad3e22fc95a80241
- SSDEEP 3072:mkAodp8N/dorgUDXqlo3+/PU3FhyIY2JOmUH3hR6TbML1P4kAu8TMGz5:mkAoj8N/+xXt+/83+lH3hKAL1ZAuwnF
- MD5 SHA1 SHA512 SSDEEP