Analysis
- max time kernel
136s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
13/01/2023, 17:55
General
- Target 4e9b005252de59cacab5996c9e138f69.exe
- Size 1.1MB
- Sample230113-whe2dsfa5y
- SHA256 799e1908d6d147e10b31d1e8d662fe3158d65738a218bd3b0105af1b455d256c
Malware Config
Signatures
- Blocklisted process makes network request 4 IoCs
- Sets DLL path for service in the registry 2 TTPs 2 IoCs
- Sets service image path in registry 2 TTPs 4 IoCs
- Loads dropped DLL 3 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Suspicious use of SetThreadContext 1 IoCs
- Drops file in Program Files directory 26 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Program crash 1 IoCs
- Checks processor information in registry 2 TTPs 48 IoCs
Processor information is often read in order to detect sandboxing environments.
- Modifies registry class 5 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\4e9b005252de59cacab5996c9e138f69.exe"C:\Users\Admin\AppData\Local\Temp\4e9b005252de59cacab5996c9e138f69.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exe"C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Rruwtqrefy.tmp",Uuhpdwiyer2⤵
- Blocklisted process makes network request
- Sets DLL path for service in the registry
- Sets service image path in registry
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 172233⤵
- Modifies registry class
- Suspicious use of FindShellTrayWindow
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C:\Windows\SysWOW64\schtasks.exeschtasks /End /tn \Microsoft\Windows\Wininet\CacheTask3⤵
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C:\Windows\SysWOW64\schtasks.exeschtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask3⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2220 -s 5602⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2220 -ip 22201⤵
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵
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C:\Windows\SysWOW64\svchost.exeC:\Windows\SysWOW64\svchost.exe -k LocalService1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exe"C:\Windows\system32\rundll32.exe" "c:\program files (x86)\windows nt\tabletextservice\combine_r_rhp..dll",bWILbE9v2⤵
- Loads dropped DLL
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
Combine_R_RHP..dll
Combine_R_RHP..dll
AirSpace.Etw.man
Microsoft.BioEnrollment_10.0.19041.1023_neutral__cw5n1h2txyewy.xml
MicrosoftEdgeUpdate.log
MicrosoftOffice2010Win64.xml
Peqquspi.tmp
TELEMETRY.ASM-WINDOWSSQ.json
edb.chk
qmgr.db
s640.hash
Rruwtqrefy.tmp
Rruwtqrefy.tmp
combine_r_rhp..dll
memory/1088-152-0x000002C82C080000-0x000002C82C329000-memory.dmp
memory/1088-148-0x000002C82DAD0000-0x000002C82DC10000-memory.dmp
memory/1088-149-0x000002C82DAD0000-0x000002C82DC10000-memory.dmp
memory/1088-151-0x0000000000DA0000-0x0000000001038000-memory.dmp
memory/2220-138-0x0000000000400000-0x0000000000525000-memory.dmp
memory/2220-133-0x0000000002380000-0x00000000024A4000-memory.dmp
memory/2220-132-0x0000000002274000-0x0000000002358000-memory.dmp
memory/2220-134-0x0000000000400000-0x0000000000525000-memory.dmp
memory/3068-140-0x00000000048E0000-0x000000000540F000-memory.dmp
memory/3068-150-0x00000000055C9000-0x00000000055CB000-memory.dmp
memory/3068-143-0x0000000005550000-0x0000000005690000-memory.dmp
memory/3068-142-0x0000000005550000-0x0000000005690000-memory.dmp
memory/3068-141-0x0000000005550000-0x0000000005690000-memory.dmp
memory/3068-145-0x0000000005550000-0x0000000005690000-memory.dmp
memory/3068-139-0x00000000048E0000-0x000000000540F000-memory.dmp
memory/3068-146-0x0000000005550000-0x0000000005690000-memory.dmp
memory/3068-144-0x0000000005550000-0x0000000005690000-memory.dmp
memory/3068-153-0x00000000048E0000-0x000000000540F000-memory.dmp
memory/3312-169-0x0000000004A00000-0x000000000552F000-memory.dmp
memory/3312-170-0x0000000004A00000-0x000000000552F000-memory.dmp
memory/3312-171-0x0000000004A00000-0x000000000552F000-memory.dmp
memory/4596-157-0x00000000039D0000-0x00000000044FF000-memory.dmp
memory/4596-168-0x00000000039D0000-0x00000000044FF000-memory.dmp
memory/4596-173-0x00000000039D0000-0x00000000044FF000-memory.dmp