Analysis
- max time kernel
150s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
21/03/2024, 19:36
General
- Target f2d1f4ec91d65ce95ad734b10664fd68.exe
- Size 316KB
- Sample240321-ya81lsaa4y
- SHA256 7e58fdd635ef291b98c8c9e6c317fc4f6699dfb8580d95159fdb8f39e9ba9ea6
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
.vook
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offline_id
1eSPzWRaNslCgtjBZfL5pzvovoiaVI4IZSnvAwt1
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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
-
https://relevantvoicelesskw.shop/api
Signatures
- Detected Djvu ransomware 9 IoCs
- Djvu Ransomware
Ransomware which is a variant of the STOP family.
- Lumma Stealer
An infostealer written in C++ first seen in August 2022.
- 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.
- Deletes itself 1 IoCs
- Executes dropped EXE 5 IoCs
- Modifies file permissions 1 TTPs 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 3 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 4 IoCs
- Checks SCSI registry key(s) 3 TTPs 3 IoCs
SCSI information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 32 IoCs
- Suspicious use of UnmapMainImage 1 IoCs
- Suspicious use of WriteProcessMemory 45 IoCs
- 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\f2d1f4ec91d65ce95ad734b10664fd68.exe"C:\Users\Admin\AppData\Local\Temp\f2d1f4ec91d65ce95ad734b10664fd68.exe"1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\B41D.bat" "1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\reg.exereg add "HKEY_CURRENT_USER\Software\clicker\key" /v primary /t REG_DWORD /d 12⤵
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C:\Users\Admin\AppData\Local\Temp\EE39.exeC:\Users\Admin\AppData\Local\Temp\EE39.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\EE39.exeC:\Users\Admin\AppData\Local\Temp\EE39.exe2⤵
- Checks computer location settings
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\cf7030e5-9d32-4b1c-81d7-7e4d6591b63c" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\EE39.exe"C:\Users\Admin\AppData\Local\Temp\EE39.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\EE39.exe"C:\Users\Admin\AppData\Local\Temp\EE39.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2460 -s 5685⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 2460 -ip 24601⤵
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C:\Users\Admin\AppData\Local\Temp\14CD.exeC:\Users\Admin\AppData\Local\Temp\14CD.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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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⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2200 -s 12003⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2200 -s 12323⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2200 -s 12483⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 2200 -ip 22001⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 2200 -ip 22001⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 2200 -ip 22001⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
14CD.exe
B41D.bat
EE39.exe
memory/452-22-0x0000000000400000-0x0000000000537000-memory.dmp
memory/452-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/452-26-0x0000000000400000-0x0000000000537000-memory.dmp
memory/452-25-0x0000000000400000-0x0000000000537000-memory.dmp
memory/452-24-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1128-39-0x00000000021B0000-0x000000000224C000-memory.dmp
memory/1424-20-0x0000000002310000-0x00000000023AD000-memory.dmp
memory/1424-21-0x0000000002500000-0x000000000261B000-memory.dmp
memory/2016-53-0x0000000000510000-0x000000000056E000-memory.dmp
memory/2016-68-0x0000000002A30000-0x0000000004A30000-memory.dmp
memory/2016-63-0x0000000002A30000-0x0000000004A30000-memory.dmp
memory/2016-61-0x0000000074780000-0x0000000074F30000-memory.dmp
memory/2016-54-0x0000000074780000-0x0000000074F30000-memory.dmp
memory/2200-64-0x0000000002A30000-0x0000000004A30000-memory.dmp
memory/2200-65-0x0000000001140000-0x0000000001141000-memory.dmp
memory/2200-67-0x0000000000400000-0x000000000044A000-memory.dmp
memory/2200-66-0x0000000000400000-0x000000000044A000-memory.dmp
memory/2200-62-0x0000000000400000-0x000000000044A000-memory.dmp
memory/2200-57-0x0000000000400000-0x000000000044A000-memory.dmp
memory/2460-42-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2460-45-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2460-43-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3440-4-0x0000000002F70000-0x0000000002F86000-memory.dmp
memory/4848-3-0x0000000000400000-0x0000000002D4D000-memory.dmp
memory/4848-5-0x0000000000400000-0x0000000002D4D000-memory.dmp
memory/4848-2-0x0000000004A90000-0x0000000004A9B000-memory.dmp
memory/4848-1-0x0000000002D90000-0x0000000002E90000-memory.dmp