Analysis
- max time kernel
105s - max time network
112s - platform
windows10_x64 - resource
win10v20201028 - submitted
24/12/2020, 16:34
General
- Target COT26606 (1).pdf.exe
- Size 3.3MB
- Sample201224-6q368klv86
- SHA256 218749361bde82c8be049aa53b7b55591fbf3934c4338971cb25f2cc570a855d
Malware Config
Extracted
-
Protocol
smtp
-
Host
pro40.emailserver.vn
-
Port
587
-
Username
-
Password
Vexa@2013
Signatures
- Modifies WinLogon for persistence 2 TTPs 1 IoCs
- Drops startup file 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.
- Adds Run key to start application 2 TTPs 2 IoCs
- Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 1 IoCs
- Suspicious behavior: EnumeratesProcesses 8 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\COT26606 (1).pdf.exe"C:\Users\Admin\AppData\Local\Temp\COT26606 (1).pdf.exe"1⤵
- Modifies WinLogon for persistence
- Drops startup file
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\COT26606 (1).pdf.exe"C:\Users\Admin\AppData\Local\Temp\COT26606 (1).pdf.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/212-10-0x0000000000400000-0x000000000046A000-memory.dmp
memory/212-13-0x00000000739A0000-0x000000007408E000-memory.dmp
memory/212-18-0x0000000006920000-0x0000000006921000-memory.dmp
memory/756-2-0x00000000739A0000-0x000000007408E000-memory.dmp
memory/756-3-0x0000000000D40000-0x0000000000D41000-memory.dmp
memory/756-5-0x0000000005E60000-0x0000000005E61000-memory.dmp
memory/756-6-0x0000000005A00000-0x0000000005A01000-memory.dmp
memory/756-7-0x0000000005CD0000-0x0000000005CD1000-memory.dmp
memory/756-8-0x0000000005970000-0x0000000005971000-memory.dmp
memory/756-9-0x0000000005D70000-0x0000000005DE7000-memory.dmp