Analysis
- max time kernel
149s - max time network
151s - platform
windows10_x64 - resource
win10v200722 - submitted
17/08/2020, 06:33
General
- Target BL & Original Shipping documents.exe
- Size 573KB
- Sample200817-azhfpxrtjn
- SHA256 ccac5881ca9beeead13f5c7f05b289e9d3013a9eea7ce8a087dcb0aade9a60e2
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
smtp.yandex.com
-
Port
587
-
Username
-
Password
@%*^)r#XFB738T!
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.
- Adds Run key to start application 2 TTPs 1 IoCs
- 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 behavior: RenamesItself 1 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\BL & Original Shipping documents.exe"C:\Users\Admin\AppData\Local\Temp\BL & Original Shipping documents.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\JmvuzybDsOib" /XML "C:\Users\Admin\AppData\Local\Temp\tmp480B.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\BL & Original Shipping documents.exe"{path}"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/3908-21-0x0000000005A70000-0x0000000005A71000-memory.dmp
memory/3908-20-0x00000000055D0000-0x00000000055D1000-memory.dmp
memory/3908-15-0x0000000073490000-0x0000000073B7E000-memory.dmp
memory/3908-12-0x0000000000400000-0x0000000000466000-memory.dmp
memory/3956-5-0x0000000007E40000-0x0000000007E41000-memory.dmp
memory/3956-9-0x000000000C050000-0x000000000C0B2000-memory.dmp
memory/3956-8-0x0000000003370000-0x00000000033E0000-memory.dmp
memory/3956-7-0x0000000007E50000-0x0000000007E54000-memory.dmp
memory/3956-6-0x00000000081D0000-0x00000000081D1000-memory.dmp
memory/3956-0-0x0000000073490000-0x0000000073B7E000-memory.dmp
memory/3956-4-0x0000000007E80000-0x0000000007E81000-memory.dmp
memory/3956-3-0x00000000082E0000-0x00000000082E1000-memory.dmp
memory/3956-1-0x0000000000F60000-0x0000000000F61000-memory.dmp