Analysis
- max time kernel
146s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
19/01/2023, 17:17
General
- Target file.exe
- Size 187KB
- Sample230119-vtn8rsdf2v
- SHA256 a80e06ee22c8e2de0cdf1c8da1308dce4bb23bec725146b39bd5db4444bbf1e5
Malware Config
Signatures
- Detects Smokeloader packer 1 IoCs
- SmokeLoader
Modular backdoor trojan in use since 2014.
- Blocklisted process makes network request 3 IoCs
- Downloads MZ/PE file
- Executes dropped EXE 1 IoCs
- Sets DLL path for service in the registry 2 TTPs 1 IoCs
- Sets service image path in registry 2 TTPs 1 IoCs
- Loads dropped DLL 1 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 14 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Program crash 1 IoCs
- Checks SCSI registry key(s) 3 TTPs 3 IoCs
SCSI information is often read in order to detect sandboxing environments.
- Checks processor information in registry 2 TTPs 19 IoCs
Processor information is often read in order to detect sandboxing environments.
- Modifies Internet Explorer settings 1 TTPs 4 IoCs
- Modifies registry class 30 IoCs
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 20 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SetWindowsHookEx 2 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
-
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
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C:\Users\Admin\AppData\Local\Temp\C6CF.exeC:\Users\Admin\AppData\Local\Temp\C6CF.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\rundll32.exe"C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Waeeuireedsay.tmp",Oqahautwaqfe2⤵
- 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 WriteProcessMemory
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C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 190293⤵
- Modifies registry class
- Suspicious use of FindShellTrayWindow
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3604 -s 5202⤵
- Program crash
-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3604 -ip 36041⤵
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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⤵
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C:\Windows\SysWOW64\rundll32.exe"C:\Windows\system32\rundll32.exe" "c:\program files (x86)\windows defender\es-es\cryptocme.dll",IAQcZko=2⤵
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
cryptocme.dll
cryptocme.dll
154E23D0-C644-4E6F-8CE6-5069272F999F.vsch
CiPT0000.001
Microsoft.MicrosoftSolitaireCollection_4.4.8204.0_neutral_split.scale-125_8wekyb3d8bbwe.xml
MicrosoftWordpad.xml
Oooyudpfeiey.tmp
Oooyudpfeiey.tmp
user-48.png
C6CF.exe
C6CF.exe
Waeeuireedsay.tmp
Waeeuireedsay.tmp
cryptocme.dll
memory/1604-199-0x0000000004DF0000-0x0000000005953000-memory.dmp
memory/1604-200-0x0000000004DF0000-0x0000000005953000-memory.dmp
memory/2644-145-0x00000000030C0000-0x00000000030D0000-memory.dmp
memory/2644-168-0x00000000030F0000-0x0000000003100000-memory.dmp
memory/2644-151-0x00000000030C0000-0x00000000030D0000-memory.dmp
memory/2644-152-0x00000000030C0000-0x00000000030D0000-memory.dmp
memory/2644-153-0x00000000030C0000-0x00000000030D0000-memory.dmp
memory/2644-154-0x00000000030C0000-0x00000000030D0000-memory.dmp
memory/2644-155-0x00000000030F0000-0x0000000003100000-memory.dmp
memory/2644-156-0x00000000030F0000-0x0000000003100000-memory.dmp
memory/2644-157-0x00000000030F0000-0x0000000003100000-memory.dmp
memory/2644-149-0x00000000030C0000-0x00000000030D0000-memory.dmp
memory/2644-148-0x00000000030C0000-0x00000000030D0000-memory.dmp
memory/2644-147-0x00000000030C0000-0x00000000030D0000-memory.dmp
memory/2644-136-0x00000000030C0000-0x00000000030D0000-memory.dmp
memory/2644-146-0x00000000030C0000-0x00000000030D0000-memory.dmp
memory/2644-144-0x00000000030C0000-0x00000000030D0000-memory.dmp
memory/2644-143-0x00000000030C0000-0x00000000030D0000-memory.dmp
memory/2644-142-0x00000000030C0000-0x00000000030D0000-memory.dmp
memory/2644-141-0x00000000030C0000-0x00000000030D0000-memory.dmp
memory/2644-167-0x00000000030D0000-0x00000000030E0000-memory.dmp
memory/2644-150-0x00000000030C0000-0x00000000030D0000-memory.dmp
memory/2644-170-0x00000000030F0000-0x0000000003100000-memory.dmp
memory/2644-169-0x00000000030F0000-0x0000000003100000-memory.dmp
memory/2644-137-0x00000000030C0000-0x00000000030D0000-memory.dmp
memory/2644-138-0x00000000030C0000-0x00000000030D0000-memory.dmp
memory/2644-139-0x00000000030D0000-0x00000000030E0000-memory.dmp
memory/2644-140-0x00000000030C0000-0x00000000030D0000-memory.dmp
memory/2920-175-0x00000000048C0000-0x0000000004A00000-memory.dmp
memory/2920-176-0x0000000004939000-0x000000000493B000-memory.dmp
memory/2920-177-0x00000000048C0000-0x0000000004A00000-memory.dmp
memory/2920-178-0x00000000048C0000-0x0000000004A00000-memory.dmp
memory/2920-179-0x00000000048C0000-0x0000000004A00000-memory.dmp
memory/2920-174-0x00000000048C0000-0x0000000004A00000-memory.dmp
memory/2920-173-0x00000000048C0000-0x0000000004A00000-memory.dmp
memory/2920-172-0x0000000004E50000-0x00000000059B3000-memory.dmp
memory/2920-183-0x0000000004939000-0x000000000493B000-memory.dmp
memory/2920-171-0x0000000004E50000-0x00000000059B3000-memory.dmp
memory/2920-186-0x0000000004E50000-0x00000000059B3000-memory.dmp
memory/3604-165-0x0000000004A60000-0x0000000004B8B000-memory.dmp
memory/3604-164-0x0000000004970000-0x0000000004A58000-memory.dmp
memory/3604-166-0x0000000000400000-0x0000000002C6F000-memory.dmp
memory/3692-182-0x0000019C1D630000-0x0000019C1D770000-memory.dmp
memory/3692-181-0x0000019C1D630000-0x0000019C1D770000-memory.dmp
memory/3692-184-0x00000000007E0000-0x0000000000A72000-memory.dmp
memory/3692-185-0x0000019C1BBE0000-0x0000019C1BE83000-memory.dmp
memory/4640-132-0x0000000002CBD000-0x0000000002CD0000-memory.dmp
memory/4640-135-0x0000000000400000-0x0000000002B99000-memory.dmp
memory/4640-134-0x0000000000400000-0x0000000002B99000-memory.dmp
memory/4640-133-0x0000000002C50000-0x0000000002C59000-memory.dmp
memory/4892-190-0x0000000004680000-0x00000000051E3000-memory.dmp