Analysis
- max time kernel
150s - max time network
144s - platform
windows10_x64 - resource
win10-en-20211014 - submitted
08/12/2021, 09:04
General
- Target Tax payment invoice - Wednesday, December 8, 2021,pdf.exe
- Size 379KB
- Sample211208-k1pg1ahbgr
- SHA256 48077dbf8d6f3b0e5e1567690798b6cf960cd22636beb363ef46efb2acd4cd82
Malware Config
Extracted
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formbook
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4.1
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c4ch
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http://www.mdkfsdf.info/c4ch/
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doyouhaveacorner.space
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emlm3p.com
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springhilllawn.com
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journee-interimaire.net
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handelsplaats.icu
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xxyyff.top
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3ebpa4asef.com
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thelogofolio.com
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ikkbs-b01.com
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gamingsigma.com
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lizzieandwildcandleco.com
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xayylc.com
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gplclean.com
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couplets-store.com
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mcpcancun.com
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brandingperspectives.com
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newyorkpowerwash.com
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leuni-onljne.com
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caixinhadesom.com
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yizemudan.com
Signatures
- Formbook
Formbook is a data stealing malware which is capable of stealing data.
- suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
- Formbook Payload 4 IoCs
- Loads dropped DLL 1 IoCs
- Suspicious use of SetThreadContext 3 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 60 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 5 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 12 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\Tax payment invoice - Wednesday, December 8, 2021,pdf.exe"C:\Users\Admin\AppData\Local\Temp\Tax payment invoice - Wednesday, December 8, 2021,pdf.exe"2⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Tax payment invoice - Wednesday, December 8, 2021,pdf.exe"C:\Users\Admin\AppData\Local\Temp\Tax payment invoice - Wednesday, December 8, 2021,pdf.exe"3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\cscript.exe"C:\Windows\SysWOW64\cscript.exe"2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe/c del "C:\Users\Admin\AppData\Local\Temp\Tax payment invoice - Wednesday, December 8, 2021,pdf.exe"3⤵
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/648-125-0x0000000002B00000-0x0000000002B2F000-memory.dmp
memory/648-124-0x0000000000AC0000-0x0000000000AE7000-memory.dmp
memory/648-126-0x0000000004D70000-0x0000000005090000-memory.dmp
memory/648-127-0x0000000004BD0000-0x0000000004C63000-memory.dmp
memory/2324-118-0x0000000000A40000-0x0000000000D60000-memory.dmp
memory/2324-120-0x0000000000530000-0x000000000067A000-memory.dmp
memory/2324-116-0x0000000000400000-0x000000000042F000-memory.dmp
memory/3020-121-0x0000000005480000-0x000000000562E000-memory.dmp
memory/3020-128-0x0000000006550000-0x000000000668F000-memory.dmp