Analysis
- max time kernel
146s - max time network
110s - platform
windows10_x64 - resource
win10v20201028 - 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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Protocol
smtp
-
Host
mail.kanzen.com.my
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Port
587
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Username
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Password
YELee@1919
Extracted
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agenttesla
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Protocol
smtp
-
Host
mail.kanzen.com.my
-
Port
587
-
Username
-
Password
YELee@1919
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 2 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 14 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\tmpF9D7.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/656-5-0x0000000004E80000-0x0000000004E81000-memory.dmp
memory/656-3-0x0000000004D40000-0x0000000004D41000-memory.dmp
memory/656-0-0x0000000074070000-0x000000007475E000-memory.dmp
memory/656-6-0x0000000005590000-0x00000000055E1000-memory.dmp
memory/656-7-0x0000000005BF0000-0x0000000005BF1000-memory.dmp
memory/656-8-0x0000000005760000-0x0000000005761000-memory.dmp
memory/656-1-0x0000000000380000-0x0000000000381000-memory.dmp
memory/656-4-0x00000000028C0000-0x00000000028CB000-memory.dmp
memory/2820-11-0x0000000000400000-0x0000000000450000-memory.dmp
memory/2820-14-0x0000000074070000-0x000000007475E000-memory.dmp
memory/2820-19-0x0000000005690000-0x0000000005691000-memory.dmp
memory/2820-23-0x0000000006710000-0x0000000006711000-memory.dmp