Analysis
- max time kernel
147s - max time network
139s - platform
windows10_x64 - resource
win10v20201028 - submitted
03/02/2021, 13:42
General
- Target rcx41011_exe.exe
- Size 241KB
- Sample210203-b71cp4xcv2
- SHA256 438f095538e09af9bbed2379f8cfd673847dc00df4bc8ff3b47f4cb3645bf966
Malware Config
Extracted
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formbook
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http://www.unitvn.com/krc/
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grayfoxden.com
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drupadhyayashomoeopathy.com
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coordinatedcare-ok.com
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the-legend-update3.com
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remoteworkoffer.com
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r3dprojects.com
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banhuaihangschool.com
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7852bigbucktrail.info
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villagepizzafloralpark.com
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sgtradingusa.com
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evolvestephanieperreault.com
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timelessbeautylessons.com
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monkeytrivia.com
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bsf.xyz
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canda.design
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recetasnutribullet.com
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olenfex.com
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catatan-matematika.com
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roeltecnologiadigital.com
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jutoxnatural.com
Signatures
- Formbook
Formbook is a data stealing malware which is capable of stealing data.
- Formbook Payload 2 IoCs
- Loads dropped DLL 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious use of SetThreadContext 3 IoCs
- Enumerates system info in registry 2 TTPs 1 IoCs
- Suspicious behavior: EnumeratesProcesses 68 IoCs
- Suspicious behavior: MapViewOfSection 6 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of UnmapMainImage 1 IoCs
- Suspicious use of WriteProcessMemory 10 IoCs
Processes
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\rcx41011_exe.exe"C:\Users\Admin\AppData\Local\Temp\rcx41011_exe.exe"2⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\rcx41011_exe.exe"C:\Users\Admin\AppData\Local\Temp\rcx41011_exe.exe"3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\chkdsk.exe"C:\Windows\SysWOW64\chkdsk.exe"2⤵
- Suspicious use of SetThreadContext
- Enumerates system info in registry
- 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\rcx41011_exe.exe"3⤵
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/2144-9-0x0000000006270000-0x0000000006381000-memory.dmp
memory/2144-16-0x0000000002F30000-0x0000000002FFC000-memory.dmp
memory/3068-11-0x00000000009F0000-0x00000000009FA000-memory.dmp
memory/3068-12-0x0000000004F70000-0x0000000004F9E000-memory.dmp
memory/3068-14-0x00000000054C0000-0x00000000057E0000-memory.dmp
memory/3068-15-0x00000000057E0000-0x0000000005873000-memory.dmp
memory/3604-8-0x00000000008D0000-0x00000000008E4000-memory.dmp
memory/3604-6-0x0000000000400000-0x000000000042E000-memory.dmp
memory/3604-7-0x0000000000A00000-0x0000000000D20000-memory.dmp