Analysis
- max time kernel
150s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20220901-en - resource tags
- submitted
04/10/2022, 10:06
General
- Target PO.41022.pdf.exe
- Size 1.1MB
- Sample221004-l43dpsaee2
- SHA256 714e4e1608cc5486e6ebbb112c3dda90ce2398d346539ef636adb31d5268ee58
Malware Config
Extracted
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formbook
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tz8t
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NFk7MP6QpDFJEJrVpUy0
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GEMrXu+Hnm9IKFxy
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IT8gJF3/gCxP
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7dtVECE6S0wDp06OGg==
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kzuhI3D1M9lFyzWhFA==
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UVGjAr/aAiVEBPtKKrIHS8c=
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LUoV7DnQCbhftSNxAa/sb9o=
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gBXNjrxhyASzXx9kAw==
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6o0Vl1R+tXIKX8MLl075wvb+
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wWleMnYYLapbM/cZKrIHS8c=
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mxcAPMpdoFgFWMnluG7HiA==
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Lc8s0dmxDB7HJA==
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fNexBb7nimQMfDM=
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/wFu2LTK4fCH1sEQoIB5gwZYMbig
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9ZsAf01ejq1YOX+fR9iK7DQUpO65
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kk66JPP8RtSC3lTXoWfy8W8RpInmvB3fWg==
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y//p1p2nIgC2Ig==
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6csYfkRRU1wPp06OGg==
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OjvSTCtGd5JAKOFmIMGghg==
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Cr/W0C7J+w5GXx9kAw==
Signatures
- Formbook
Formbook is a data stealing malware which is capable of stealing data.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Suspicious use of SetThreadContext 3 IoCs
- Modifies Internet Explorer settings 1 TTPs 1 IoCs
- Suspicious behavior: EnumeratesProcesses 49 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 7 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SendNotifyMessage 1 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\PO.41022.pdf.exe"C:\Users\Admin\AppData\Local\Temp\PO.41022.pdf.exe"2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\PO.41022.pdf.exe"C:\Users\Admin\AppData\Local\Temp\PO.41022.pdf.exe"3⤵
- 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\rundll32.exe"C:\Windows\SysWOW64\rundll32.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
memory/3024-146-0x0000000002DA0000-0x0000000002E8D000-memory.dmp
memory/3024-156-0x0000000003120000-0x00000000031DD000-memory.dmp
memory/3024-154-0x0000000003120000-0x00000000031DD000-memory.dmp
memory/4288-155-0x00000000006C0000-0x00000000006ED000-memory.dmp
memory/4288-153-0x00000000028E0000-0x000000000296F000-memory.dmp
memory/4288-152-0x0000000002590000-0x00000000028DA000-memory.dmp
memory/4288-150-0x0000000000BC0000-0x0000000000BD4000-memory.dmp
memory/4288-151-0x00000000006C0000-0x00000000006ED000-memory.dmp
memory/4732-149-0x0000000000401000-0x000000000042F000-memory.dmp
memory/4732-139-0x0000000000400000-0x000000000042F000-memory.dmp
memory/4732-145-0x00000000011E0000-0x00000000011F0000-memory.dmp
memory/4732-141-0x0000000000400000-0x000000000042F000-memory.dmp
memory/4732-142-0x0000000000401000-0x000000000042F000-memory.dmp
memory/4732-148-0x0000000000400000-0x000000000042F000-memory.dmp
memory/4732-144-0x0000000001A90000-0x0000000001DDA000-memory.dmp
memory/4796-132-0x0000000000540000-0x000000000065E000-memory.dmp
memory/4796-137-0x0000000008F60000-0x0000000008FC6000-memory.dmp
memory/4796-136-0x0000000008C20000-0x0000000008CBC000-memory.dmp
memory/4796-135-0x00000000050A0000-0x00000000050AA000-memory.dmp
memory/4796-134-0x0000000005000000-0x0000000005092000-memory.dmp
memory/4796-133-0x00000000055B0000-0x0000000005B54000-memory.dmp