Analysis
- max time kernel
91s - max time network
144s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
02/11/2022, 23:56
General
- Target Original BL.exe
- Size 275KB
- Sample221102-3y1flacgh7
- SHA256 0e9cef4df6cee909e112ce177bdc735afa09d43cacb8614b282d9f18ef62cef9
Malware Config
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Executes dropped EXE 3 IoCs
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 3 IoCs
- Suspicious behavior: MapViewOfSection 2 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 10 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Original BL.exe"C:\Users\Admin\AppData\Local\Temp\Original BL.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\cnvniblzm.exe"C:\Users\Admin\AppData\Local\Temp\cnvniblzm.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\cnvniblzm.exe"C:\Users\Admin\AppData\Local\Temp\cnvniblzm.exe"3⤵
- Executes dropped EXE
-
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C:\Users\Admin\AppData\Local\Temp\cnvniblzm.exe"C:\Users\Admin\AppData\Local\Temp\cnvniblzm.exe"3⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
cnvniblzm.exe
cnvniblzm.exe
cnvniblzm.exe
cnvniblzm.exe
fmtwzbqvgn.d
plrox.glq
memory/4284-141-0x0000000005E00000-0x00000000063A4000-memory.dmp
memory/4284-142-0x0000000000400000-0x000000000044E000-memory.dmp
memory/4284-143-0x0000000005850000-0x00000000058EC000-memory.dmp
memory/4284-144-0x0000000006770000-0x00000000067D6000-memory.dmp
memory/4284-145-0x00000000069B0000-0x0000000006A00000-memory.dmp
memory/4284-146-0x0000000006B20000-0x0000000006BB2000-memory.dmp
memory/4284-147-0x0000000006D10000-0x0000000006D1A000-memory.dmp