Analysis
- max time kernel
150s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
27/10/2022, 16:48
General
- Target 3745a1fe4166a96e06729c67fd1469c7.exe
- Size 274KB
- Sample221027-va526schfn
- SHA256 e4a8d78909b8d84fcb3d01b91ddeab26615148da704621a3635ac869c9d5dcaf
Malware Config
Extracted
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formbook
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axe3
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nV63ydJMXMf7memspIpnnVLl3Q==
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uJ50rs5Y/80AqT79guHh
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FcsTFQ1xekTgcal8G0P2ZTQ=
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uLWWVJP++ID3dkoB8g==
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YyoybGF5Fsa/UH8=
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Tk4htwkBBfM5ZA==
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QgJ8vN9f+uCdsD79guHh
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wmjC9UuSBGyTrY5PAX9t1A==
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Sw7JEwOKl576ndxw/A==
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BOqs09Ikjej1BN98ZYtVfSi5xQ==
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YA5cbH3/4wVAYg==
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fRWIvatAXM3+t0X9guHh
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FAbZXq/jFuaEq2YCwQh3b2oE
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STL+RDTA652/tD/9guHh
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zgLNcuX32aFB
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WmgwW1UCJ/9Nc0ofkIhVyQ==
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jiWgy9ckGh8G+3Q7Rl//NW9ZU7TU
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JCoawiBkwAkeJOehkNXRCYnj3A==
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WQDFZvang91P
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zGrJ4CA2pAhR
Signatures
- Formbook
Formbook is a data stealing malware which is capable of stealing data.
- Executes dropped EXE 2 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Suspicious use of SetThreadContext 3 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Modifies Internet Explorer settings 1 TTPs 1 IoCs
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 8 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 13 IoCs
Processes
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\3745a1fe4166a96e06729c67fd1469c7.exe"C:\Users\Admin\AppData\Local\Temp\3745a1fe4166a96e06729c67fd1469c7.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\psyfho.exe"C:\Users\Admin\AppData\Local\Temp\psyfho.exe"3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\psyfho.exe"C:\Users\Admin\AppData\Local\Temp\psyfho.exe"4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\help.exe"C:\Windows\SysWOW64\help.exe"2⤵
- Suspicious use of SetThreadContext
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Program Files\Mozilla Firefox\Firefox.exe"C:\Program Files\Mozilla Firefox\Firefox.exe"3⤵
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
iyswjuwfq.txa
mqndj.psu
psyfho.exe
psyfho.exe
psyfho.exe
memory/700-153-0x00000000087B0000-0x0000000008871000-memory.dmp
memory/700-151-0x00000000087B0000-0x0000000008871000-memory.dmp
memory/700-143-0x00000000088E0000-0x0000000008A5E000-memory.dmp
memory/1696-147-0x0000000000560000-0x0000000000567000-memory.dmp
memory/1696-152-0x0000000000A40000-0x0000000000A6D000-memory.dmp
memory/1696-150-0x0000000000FB0000-0x000000000103F000-memory.dmp
memory/1696-149-0x0000000001210000-0x000000000155A000-memory.dmp
memory/1696-148-0x0000000000A40000-0x0000000000A6D000-memory.dmp
memory/4952-146-0x0000000000401000-0x000000000042F000-memory.dmp
memory/4952-145-0x0000000000400000-0x000000000042F000-memory.dmp
memory/4952-142-0x0000000001920000-0x0000000001930000-memory.dmp
memory/4952-141-0x0000000001980000-0x0000000001CCA000-memory.dmp
memory/4952-140-0x0000000000401000-0x000000000042F000-memory.dmp
memory/4952-139-0x0000000000400000-0x000000000042F000-memory.dmp