Analysis
- max time kernel
144s - max time network
143s - platform
windows10_x64 - resource
win10v200722 - submitted
15/10/2020, 08:44
General
- Target Azcorp Engineering Services.exe
- Size 723KB
- Sample201015-emkpkp446a
- SHA256 40eebe6e20f2fb031c89ef9fa83d485d03ebcd39b6699ab61fb0547bb0e09117
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
smtp.opw-global.com
-
Port
587
-
Username
-
Password
kxJDDNe3
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.
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- 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 6 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Azcorp Engineering Services.exe"C:\Users\Admin\AppData\Local\Temp\Azcorp Engineering Services.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\fUsaEBPyVnh" /XML "C:\Users\Admin\AppData\Local\Temp\tmp5D73.tmp"2⤵
- Creates scheduled task(s)
-
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C:\Users\Admin\AppData\Local\Temp\Azcorp Engineering Services.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/584-9-0x000000000B620000-0x000000000B68F000-memory.dmp
memory/584-4-0x0000000005840000-0x0000000005841000-memory.dmp
memory/584-5-0x00000000057E0000-0x00000000057E1000-memory.dmp
memory/584-6-0x0000000005970000-0x0000000005974000-memory.dmp
memory/584-7-0x0000000007DA0000-0x0000000007DA1000-memory.dmp
memory/584-8-0x0000000007CE0000-0x0000000007D4C000-memory.dmp
memory/584-0-0x0000000073DB0000-0x000000007449E000-memory.dmp
memory/584-1-0x0000000000EE0000-0x0000000000EE1000-memory.dmp
memory/584-3-0x0000000005E50000-0x0000000005E51000-memory.dmp
memory/2052-12-0x0000000000400000-0x000000000043C000-memory.dmp
memory/2052-15-0x0000000073DB0000-0x000000007449E000-memory.dmp
memory/2052-20-0x0000000005930000-0x0000000005931000-memory.dmp
memory/2052-21-0x00000000064C0000-0x00000000064C1000-memory.dmp