Analysis
- max time kernel
141s - max time network
110s - platform
windows10_x64 - resource
win10v20201028 - submitted
18/11/2020, 23:43
General
- Target WireTransfer Copy767.exe
- Size 453KB
- Sample201118-vq4e413hs2
- SHA256 ff30ebf52489bc096912d3d89259f8f6e44ec3ced1d124094d10f2fbfaa18590
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
smtp.merkck.com
-
Port
587
-
Username
-
Password
KDKRzR)6
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 2 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.
- 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 2 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\WireTransfer Copy767.exe"C:\Users\Admin\AppData\Local\Temp\WireTransfer Copy767.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ofswVOHQljQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp24EE.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\WireTransfer Copy767.exe"{path}"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/1532-21-0x0000000006020000-0x0000000006021000-memory.dmp
memory/1532-20-0x0000000005760000-0x0000000005761000-memory.dmp
memory/1532-15-0x0000000073D40000-0x000000007442E000-memory.dmp
memory/1532-12-0x0000000000400000-0x000000000043C000-memory.dmp
memory/3272-5-0x0000000004970000-0x0000000004971000-memory.dmp
memory/3272-9-0x00000000088C0000-0x00000000088C1000-memory.dmp
memory/3272-8-0x00000000066B0000-0x0000000006711000-memory.dmp
memory/3272-7-0x0000000007F10000-0x0000000007F24000-memory.dmp
memory/3272-6-0x00000000082F0000-0x00000000082F1000-memory.dmp
memory/3272-0-0x0000000073D40000-0x000000007442E000-memory.dmp
memory/3272-4-0x00000000049F0000-0x00000000049F1000-memory.dmp
memory/3272-3-0x0000000004EF0000-0x0000000004EF1000-memory.dmp
memory/3272-1-0x00000000000D0000-0x00000000000D1000-memory.dmp