Analysis
- max time kernel
138s - max time network
112s - platform
windows10_x64 - resource
win10v20210410 - submitted
13/07/2021, 09:17
General
- Target yFLGU0PnHsUUnOD.exe
- Size 882KB
- Sample210713-13dpsabkjx
- SHA256 c6cacd1d2bfb210318a62cabce8045f5735cd9a0e58c3aea8d3ec2174f6d7abb
Malware Config
Extracted
-
agenttesla
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Protocol
smtp
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Host
mail.speedtranslogistics.com
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Port
587
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Username
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Password
&q*L9+U[o}&o
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 3 IoCs
- Drops file in Drivers directory 1 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.
- Adds Run key to start application 2 TTPs 1 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.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 5 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\yFLGU0PnHsUUnOD.exe"C:\Users\Admin\AppData\Local\Temp\yFLGU0PnHsUUnOD.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\CFEVNjCgsxv" /XML "C:\Users\Admin\AppData\Local\Temp\tmpDE30.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\yFLGU0PnHsUUnOD.exe"C:\Users\Admin\AppData\Local\Temp\yFLGU0PnHsUUnOD.exe"2⤵
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C:\Users\Admin\AppData\Local\Temp\yFLGU0PnHsUUnOD.exe"C:\Users\Admin\AppData\Local\Temp\yFLGU0PnHsUUnOD.exe"2⤵
- Drops file in Drivers directory
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/2852-136-0x0000000005D60000-0x0000000005D61000-memory.dmp
memory/2852-135-0x0000000005220000-0x0000000005221000-memory.dmp
memory/2852-134-0x00000000050E0000-0x00000000055DE000-memory.dmp
memory/2852-127-0x0000000000400000-0x000000000043C000-memory.dmp
memory/3916-119-0x0000000005230000-0x0000000005231000-memory.dmp
memory/3916-124-0x000000000C030000-0x000000000C08E000-memory.dmp
memory/3916-123-0x000000000BE70000-0x000000000BF12000-memory.dmp
memory/3916-122-0x0000000001160000-0x0000000001170000-memory.dmp
memory/3916-121-0x00000000051C0000-0x0000000005252000-memory.dmp
memory/3916-120-0x00000000054F0000-0x00000000054F1000-memory.dmp
memory/3916-114-0x0000000000940000-0x0000000000941000-memory.dmp
memory/3916-118-0x0000000005330000-0x0000000005331000-memory.dmp
memory/3916-117-0x0000000005830000-0x0000000005831000-memory.dmp
memory/3916-116-0x0000000005290000-0x0000000005291000-memory.dmp