Analysis
- max time kernel
118s - max time network
124s - platform
windows10_x64 - resource
win10 - submitted
08/08/2020, 08:23
General
- Target TNT E-Invoice Cosignment Delivery Notification_pdf.exe
- Size 1.1MB
- Sample200808-3wc9546fsx
- SHA256 b0dd472a02ed67fe15e20e2faa6167d8c1e9d54c9f0abc95a255197bbf0c0264
Malware Config
Extracted
-
Protocol
smtp
-
Host
mail.pkbsl.com
-
Port
587
-
Username
-
Password
Bsl123Bsl123Bsl
Signatures
- Suspicious use of WriteProcessMemory 11 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious behavior: EnumeratesProcesses 3 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Modifies WinLogon for persistence 2 TTPs 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Drops startup file 2 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes
-
C:\Users\Admin\AppData\Local\Temp\TNT E-Invoice Cosignment Delivery Notification_pdf.exe"C:\Users\Admin\AppData\Local\Temp\TNT E-Invoice Cosignment Delivery Notification_pdf.exe"1⤵
- Suspicious use of WriteProcessMemory
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetThreadContext
- Modifies WinLogon for persistence
- Adds Run key to start application
- Drops startup file
-
C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"2⤵
-
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"2⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/2408-6-0x0000000000400000-0x0000000000470000-memory.dmp
memory/2408-8-0x0000000073980000-0x000000007406E000-memory.dmp
memory/2408-13-0x0000000005010000-0x0000000005011000-memory.dmp
memory/2408-14-0x00000000065E0000-0x00000000065E1000-memory.dmp
memory/2408-15-0x0000000006540000-0x0000000006541000-memory.dmp
memory/2408-16-0x0000000006500000-0x0000000006501000-memory.dmp
memory/2920-0-0x0000000073980000-0x000000007406E000-memory.dmp
memory/2920-1-0x0000000000B90000-0x0000000000B91000-memory.dmp
memory/2920-3-0x0000000005600000-0x0000000005601000-memory.dmp
memory/2920-4-0x00000000056A0000-0x000000000570F000-memory.dmp
memory/2920-5-0x0000000005D20000-0x0000000005D21000-memory.dmp