Analysis
- max time kernel
150s - max time network
123s - platform
windows10_x64 - resource
win10v20210408 - submitted
02/07/2021, 06:16
General
- Target Vessel's particular_DRYBULK.exe
- Size 531KB
- Sample210702-ppdwyehzda
- SHA256 8408707aaa2dc1118bda9431f110e265d716b5cb5bc0ca8a9655828cad8b7b0e
Malware Config
Extracted
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agenttesla
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Protocol
smtp
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Host
smtp.bafaqroup.com
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Port
587
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Username
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Password
bs%K^dS2
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 3 IoCs
- Nirsoft 5 IoCs
- Executes dropped EXE 4 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.
- 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 20 IoCs
- Suspicious use of AdjustPrivilegeToken 10 IoCs
- Suspicious use of WriteProcessMemory 20 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\Vessel's particular_DRYBULK.exe"C:\Users\Admin\AppData\Local\Temp\Vessel's particular_DRYBULK.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe"C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /EXEFilename "C:\Windows\System32\sc.exe" /WindowState 0 /CommandLine "stop WinDefend" /StartDirectory "" /RunAs 8 /Run2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe"C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /SpecialRun 4101d8 19563⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe"C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /EXEFilename "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" /WindowState 0 /CommandLine "rmdir 'C:\ProgramData\Microsoft\Windows Defender' -Recurse" /StartDirectory "" /RunAs 8 /Run2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe"C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /SpecialRun 4101d8 13243⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Local\Temp\Vessel's particular_DRYBULK.exe"C:\Users\Admin\AppData\Local\Temp\Vessel's particular_DRYBULK.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/2096-143-0x0000000005330000-0x000000000582E000-memory.dmp
memory/2096-136-0x0000000000400000-0x000000000043C000-memory.dmp
memory/2096-142-0x0000000005510000-0x0000000005511000-memory.dmp
memory/2096-144-0x0000000005F90000-0x0000000005F91000-memory.dmp
memory/2096-145-0x0000000006030000-0x0000000006031000-memory.dmp
memory/3492-114-0x0000000000420000-0x0000000000421000-memory.dmp
memory/3492-126-0x0000000006A20000-0x0000000006A7F000-memory.dmp
memory/3492-121-0x0000000006890000-0x00000000068DD000-memory.dmp
memory/3492-120-0x0000000004C70000-0x0000000004D02000-memory.dmp
memory/3492-119-0x0000000004C70000-0x0000000004D02000-memory.dmp
memory/3492-118-0x0000000004CE0000-0x0000000004CE1000-memory.dmp
memory/3492-117-0x0000000004D40000-0x0000000004D41000-memory.dmp
memory/3492-116-0x0000000005240000-0x0000000005241000-memory.dmp