Analysis
- max time kernel
147s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
23/10/2022, 04:48
General
- Target Transaccions DOC-REF DX739475.exe
- Size 335KB
- Sample221023-fe4ycagegn
- SHA256 b689885667b1f8a29bafedff5fc69526534732ebb7731d98bbc06f7005b245d5
Malware Config
Extracted
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formbook
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gbww
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3/x2lPrf1boaiESNc8cAiW4=
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iA0s1PbjLk6uKw==
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H6nPscabhknUj0OPN5C8
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AlpnEq+CD2Cim8s=
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TpSVKwidiI2Zlco=
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Cr06SJBpQarOh6neid1N0Ygf
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PDTHM+xwYDtfRfwI
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+PGiABBjqPkrm0CPN5C8
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+yvM5DhWy4/EMrmgDoyqiQ==
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yP+Hld6rfz/Mi0GPN5C8
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ph8ao77HLk6uKw==
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aZ1GKLPFOC6zeLJJ9TF+lWY=
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6h0lsVqtMwRvM2/GcMpHn2E=
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HBGt/kYL8aPsJOfk7g==
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s24NMXZPUlaTIQ==
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lYkCUs8DhGPytnSAcd6ZzpFbQhPpeadODQ==
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DPuc/IGpsgxQNf4EuvI7I/+XL++yxA==
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tSEu6roflVrLdCiJKWVIpGY=
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VWAhxYRGWxJ8
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1BIITlL357Ih0V+DTys=
Signatures
- Formbook
Formbook is a data stealing malware which is capable of stealing data.
- Checks QEMU agent file 2 TTPs 2 IoCs
Checks presence of QEMU agent, possibly to detect virtualization.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 1 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 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.
- Modifies Internet Explorer settings 1 TTPs 1 IoCs
- Suspicious behavior: EnumeratesProcesses 24 IoCs
- Suspicious behavior: MapViewOfSection 8 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 10 IoCs
Processes
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Transaccions DOC-REF DX739475.exe"C:\Users\Admin\AppData\Local\Temp\Transaccions DOC-REF DX739475.exe"2⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Transaccions DOC-REF DX739475.exe"C:\Users\Admin\AppData\Local\Temp\Transaccions DOC-REF DX739475.exe"3⤵
- Checks QEMU agent file
- Checks computer location settings
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- 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
- 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
System.dll
memory/2428-136-0x0000000077190000-0x0000000077333000-memory.dmp
memory/2428-134-0x00000000029E0000-0x0000000002AE1000-memory.dmp
memory/2428-135-0x00007FF875630000-0x00007FF875825000-memory.dmp
memory/2428-148-0x00000000029E0000-0x0000000002AE1000-memory.dmp
memory/2428-139-0x0000000077190000-0x0000000077333000-memory.dmp
memory/2428-133-0x00000000029E0000-0x0000000002AE1000-memory.dmp
memory/2576-160-0x00000000086F0000-0x0000000008837000-memory.dmp
memory/2576-162-0x0000000007260000-0x0000000007308000-memory.dmp
memory/2576-164-0x0000000007260000-0x0000000007308000-memory.dmp
memory/2576-151-0x00000000086F0000-0x0000000008837000-memory.dmp
memory/3412-161-0x0000000002C30000-0x0000000002CBF000-memory.dmp
memory/3412-163-0x0000000000D20000-0x0000000000D4D000-memory.dmp
memory/3412-159-0x0000000000D20000-0x0000000000D4D000-memory.dmp
memory/3412-158-0x0000000002F90000-0x00000000032DA000-memory.dmp
memory/3412-157-0x0000000000F20000-0x0000000000F47000-memory.dmp
memory/4136-140-0x0000000001660000-0x0000000001760000-memory.dmp
memory/4136-150-0x00000000000C0000-0x00000000000D0000-memory.dmp
memory/4136-149-0x0000000000401000-0x0000000001654000-memory.dmp
memory/4136-147-0x000000001D8D0000-0x000000001DC1A000-memory.dmp
memory/4136-153-0x0000000000400000-0x0000000001654000-memory.dmp
memory/4136-154-0x0000000001660000-0x0000000001760000-memory.dmp
memory/4136-155-0x00007FF875630000-0x00007FF875825000-memory.dmp
memory/4136-156-0x0000000077190000-0x0000000077333000-memory.dmp
memory/4136-146-0x0000000000400000-0x0000000001654000-memory.dmp
memory/4136-145-0x0000000000400000-0x000000000042F000-memory.dmp
memory/4136-144-0x0000000000400000-0x0000000001654000-memory.dmp
memory/4136-143-0x0000000077190000-0x0000000077333000-memory.dmp
memory/4136-142-0x00007FF875630000-0x00007FF875825000-memory.dmp
memory/4136-141-0x0000000001660000-0x0000000001760000-memory.dmp
memory/4136-138-0x0000000000400000-0x0000000001654000-memory.dmp