Analysis
- max time kernel
173s - max time network
195s - platform
windows10_x64 - resource
win10-en-20211208 - submitted
29/01/2022, 16:03
General
- Target eustaquio.exe
- Size 729KB
- Sample220129-thc6padbhl
- SHA256 fb81bca0be85814942a2d54565aa2e734ead67e801d9f41af84cdde043b5c135
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
mail.ashokyadav.co.in
-
Port
587
-
Username
-
Password
imports@123
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 1 IoCs
- Looks for VirtualBox Guest Additions in registry 2 TTPs
- 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.
- 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 use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\eustaquio.exe"C:\Users\Admin\AppData\Local\Temp\eustaquio.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\rieDWwmRfzyx" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC172.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\eustaquio.exe"{path}"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/1128-132-0x0000000005B30000-0x0000000005B48000-memory.dmp
memory/1128-131-0x0000000005680000-0x0000000005681000-memory.dmp
memory/1128-130-0x0000000000400000-0x000000000043C000-memory.dmp
memory/3960-124-0x0000000005040000-0x0000000005096000-memory.dmp
memory/3960-123-0x0000000004F40000-0x0000000004F4A000-memory.dmp
memory/3960-118-0x0000000000330000-0x00000000003EC000-memory.dmp
memory/3960-125-0x0000000005350000-0x000000000535A000-memory.dmp
memory/3960-126-0x0000000007880000-0x0000000007906000-memory.dmp
memory/3960-127-0x0000000009E30000-0x0000000009E6C000-memory.dmp
memory/3960-128-0x0000000000C40000-0x0000000000CA6000-memory.dmp
memory/3960-122-0x0000000004EA0000-0x000000000539E000-memory.dmp
memory/3960-121-0x0000000004EA0000-0x0000000004F32000-memory.dmp
memory/3960-120-0x00000000053A0000-0x000000000589E000-memory.dmp
memory/3960-119-0x0000000004E00000-0x0000000004E9C000-memory.dmp