Analysis
- max time kernel
150s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20220901-en - resource tags
- submitted
27/10/2022, 16:01
General
- Target asd.exe
- Size 476KB
- Sample221027-tf8jtacff2
- SHA256 405d90a313a8c61baefe1682a5b1ba97812af6ce0824603833dc4524caf08d2c
Malware Config
Extracted
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formbook
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gut0
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3quTsvyRXFRgOJDi7VK+1g==
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RW9hCFip8TncS6yM
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bcydTwQbKSj9
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hxv5VMNoSn5qKNNe2A==
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b3nntTY9MVYQzak=
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mkkE+PpOG+TKO3d99UV/LG0p
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ntGKM271x8+w/dt/ss4tSr4MTQ==
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lyHC1OIz9NCsJ4+zujw2
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Lx4vPZTwd3gftZo1eB0+
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CoF59EOstwTg4xa2L6fW/z4=
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BMmKpOyYS31fl2e8PTZlkN9o3tMbdQ==
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bTwSJWv8FtirLJuzsDAu
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A6WJp5KwbZZeTw==
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WlHybt5+bZZeTw==
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KCYEDh8Dr/Tz
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5xrdUcx7bZZeTw==
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/ruPqJ+6QMOAKNNe2A==
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+G1e5XPZtPvcS6yM
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dzLjAEjlwnsrT75X2g==
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57/C3uk+D9y8LVoIRYO0zw==
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
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 3 IoCs
- Drops file in Windows directory 2 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 42 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 8 IoCs
- Suspicious use of AdjustPrivilegeToken 6 IoCs
- Suspicious use of WriteProcessMemory 10 IoCs
Processes
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\asd.exe"C:\Users\Admin\AppData\Local\Temp\asd.exe"2⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\asd.exe"C:\Users\Admin\AppData\Local\Temp\asd.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\msdt.exe"C:\Windows\SysWOW64\msdt.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/1660-146-0x0000000000401000-0x0000000001654000-memory.dmp
memory/1660-153-0x00007FFA71D50000-0x00007FFA71F45000-memory.dmp
memory/1660-154-0x0000000077C50000-0x0000000077DF3000-memory.dmp
memory/1660-149-0x000000001D790000-0x000000001DADA000-memory.dmp
memory/1660-138-0x0000000000400000-0x0000000001654000-memory.dmp
memory/1660-139-0x0000000001660000-0x0000000001760000-memory.dmp
memory/1660-152-0x0000000001660000-0x0000000001760000-memory.dmp
memory/1660-141-0x0000000001660000-0x0000000001760000-memory.dmp
memory/1660-142-0x00007FFA71D50000-0x00007FFA71F45000-memory.dmp
memory/1660-143-0x0000000077C50000-0x0000000077DF3000-memory.dmp
memory/1660-144-0x0000000000400000-0x0000000001654000-memory.dmp
memory/1660-145-0x0000000000400000-0x000000000042F000-memory.dmp
memory/1660-155-0x000000001D520000-0x000000001D530000-memory.dmp
memory/1660-147-0x0000000000400000-0x0000000001654000-memory.dmp
memory/1944-156-0x0000000000340000-0x0000000000397000-memory.dmp
memory/1944-158-0x0000000002620000-0x000000000296A000-memory.dmp
memory/1944-161-0x0000000000610000-0x000000000063D000-memory.dmp
memory/1944-159-0x0000000002450000-0x00000000024DF000-memory.dmp
memory/1944-157-0x0000000000610000-0x000000000063D000-memory.dmp
memory/3024-150-0x0000000008520000-0x00000000085D7000-memory.dmp
memory/3024-160-0x0000000007EC0000-0x0000000007FF6000-memory.dmp
memory/3024-162-0x0000000007EC0000-0x0000000007FF6000-memory.dmp
memory/4796-133-0x000000000308E000-0x000000000324F000-memory.dmp
memory/4796-137-0x0000000077C50000-0x0000000077DF3000-memory.dmp
memory/4796-134-0x000000000308E000-0x000000000324F000-memory.dmp
memory/4796-135-0x00007FFA71D50000-0x00007FFA71F45000-memory.dmp
memory/4796-140-0x00007FFA71D50000-0x00007FFA71F45000-memory.dmp
memory/4796-148-0x000000000308E000-0x000000000324F000-memory.dmp