Analysis
- max time kernel
135s - max time network
112s - platform
windows10_x64 - resource
win10v20210410 - submitted
04/05/2021, 18:21
General
- Target ENQUIRY 050420217274.exe
- Size 1.2MB
- Sample210504-ffnjnbgrsx
- SHA256 d4a486d6eb6ff402162a440e49cb53777c2a3a0e98abb04016e189cd445676a2
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
mail.sharpn.com
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Port
587
-
Username
-
Password
tT%r.=GXU=,k
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 5 IoCs
- Suspicious behavior: RenamesItself 1 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\ENQUIRY 050420217274.exe"C:\Users\Admin\AppData\Local\Temp\ENQUIRY 050420217274.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\cZltdo" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBBC4.tmp"2⤵
- Creates scheduled task(s)
-
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C:\Users\Admin\AppData\Local\Temp\ENQUIRY 050420217274.exe"{path}"2⤵
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C:\Users\Admin\AppData\Local\Temp\ENQUIRY 050420217274.exe"{path}"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/3196-138-0x00000000031D1000-0x00000000031D2000-memory.dmp
memory/3196-135-0x00000000063E0000-0x00000000063E1000-memory.dmp
memory/3196-134-0x0000000005C50000-0x0000000005C51000-memory.dmp
memory/3196-133-0x00000000031D0000-0x00000000031D1000-memory.dmp
memory/3196-126-0x0000000000400000-0x000000000043C000-memory.dmp
memory/4436-119-0x0000000005330000-0x000000000582E000-memory.dmp
memory/4436-123-0x000000000B380000-0x000000000B3DF000-memory.dmp
memory/4436-122-0x0000000008BE0000-0x0000000008C84000-memory.dmp
memory/4436-121-0x0000000005770000-0x000000000577E000-memory.dmp
memory/4436-120-0x00000000089F0000-0x00000000089F1000-memory.dmp
memory/4436-114-0x0000000000A40000-0x0000000000A41000-memory.dmp
memory/4436-118-0x0000000005540000-0x0000000005541000-memory.dmp
memory/4436-117-0x00000000053D0000-0x00000000053D1000-memory.dmp
memory/4436-116-0x0000000005830000-0x0000000005831000-memory.dmp