Analysis
- max time kernel
91s - max time network
119s - platform
windows10_x64 - resource
win10 - submitted
14/09/2020, 15:08
General
- Target vbc.exe
- Size 942KB
- Sample200914-6jtl2yz8a2
- SHA256 a8da87f13cd07c47d1bf98a838edd704f01c2ba86a58b76a0982b6686c15626b
Malware Config
Extracted
-
Protocol
smtp
-
Host
mail.chinagrill.co
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Port
587
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Username
-
Password
SnIVrXH!]f1q
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 3 IoCs
- 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.
- Uses the VBS compiler for execution 1 TTPs
- Suspicious use of SetThreadContext 1 IoCs
- 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 WriteProcessMemory 11 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\vbc.exe"C:\Users\Admin\AppData\Local\Temp\vbc.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\VyWLBeZ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA713.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\vbc.exe"{path}"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/3020-21-0x0000000006610000-0x0000000006611000-memory.dmp
memory/3020-20-0x0000000005A80000-0x0000000005A81000-memory.dmp
memory/3020-15-0x0000000073420000-0x0000000073B0E000-memory.dmp
memory/3020-12-0x0000000000400000-0x0000000000458000-memory.dmp
memory/3876-5-0x0000000004F60000-0x0000000004F61000-memory.dmp
memory/3876-9-0x0000000009C30000-0x0000000009CA1000-memory.dmp
memory/3876-8-0x0000000007590000-0x0000000007591000-memory.dmp
memory/3876-7-0x0000000007470000-0x00000000074E7000-memory.dmp
memory/3876-6-0x00000000051A0000-0x00000000051A3000-memory.dmp
memory/3876-0-0x0000000073420000-0x0000000073B0E000-memory.dmp
memory/3876-4-0x0000000004FF0000-0x0000000004FF1000-memory.dmp
memory/3876-3-0x00000000054F0000-0x00000000054F1000-memory.dmp
memory/3876-1-0x0000000000640000-0x0000000000641000-memory.dmp