Analysis
- max time kernel
150s - max time network
13s - platform
windows7_x64 - resource
win7v20201028 - submitted
09/11/2020, 20:56
General
- Target PO 186603, PO 18582.exe
- Size 666KB
- Sample201109-892dd87p2n
- SHA256 02fafe7d00909727bb91670774f201dc8ed5122c7c0c6c25c2c8b227b6a77df4
Malware Config
Extracted
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agenttesla
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Protocol
smtp
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Host
mail.kanzen.com.my
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Port
587
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Username
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Password
YELee@1919
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 4 IoCs
- Looks for VirtualBox Guest Additions in registry 2 TTPs
- rezer0 1 IoCs
Detects ReZer0, a packer with multiple versions used in various campaigns.
- Looks for VMWare Tools registry key 2 TTPs
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- 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
- Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
- 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 3 IoCs
- Suspicious behavior: RenamesItself 1 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 17 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\PO 186603, PO 18582.exe"C:\Users\Admin\AppData\Local\Temp\PO 186603, PO 18582.exe"1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- 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\KxnLNQiEdOgFj" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9FB9.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\PO 186603, PO 18582.exe"{path}"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\netsh.exe"netsh" wlan show profile3⤵
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/292-0-0x00000000748D0000-0x0000000074FBE000-memory.dmp
memory/292-1-0x0000000001340000-0x0000000001341000-memory.dmp
memory/292-3-0x0000000000420000-0x000000000042B000-memory.dmp
memory/292-4-0x0000000000EE0000-0x0000000000F31000-memory.dmp
memory/1020-7-0x0000000000400000-0x0000000000450000-memory.dmp
memory/1020-9-0x0000000000400000-0x0000000000450000-memory.dmp
memory/1020-10-0x0000000000400000-0x0000000000450000-memory.dmp
memory/1020-11-0x00000000748D0000-0x0000000074FBE000-memory.dmp