Analysis
- max time kernel
140s - max time network
114s - platform
windows10_x64 - resource
win10v20210410 - submitted
22/06/2021, 17:44
General
- Target invoice copy.exe
- Size 1.2MB
- Sample210622-ey4yhmvya2
- SHA256 7f19771f0cacfaf402dde4d1a98b71dbd418d0d83a31d5e233c43cc7da202df0
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
mail.esquiresweaters.com
-
Port
587
-
Username
-
Password
Esquire@#2078
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 3 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.
- 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 SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\invoice copy.exe"C:\Users\Admin\AppData\Local\Temp\invoice copy.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\coNJhYqrs" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE2E4.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\invoice copy.exe"C:\Users\Admin\AppData\Local\Temp\invoice copy.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/4092-135-0x0000000006490000-0x0000000006491000-memory.dmp
memory/4092-134-0x0000000005970000-0x0000000005971000-memory.dmp
memory/4092-133-0x0000000005830000-0x0000000005D2E000-memory.dmp
memory/4092-127-0x0000000000400000-0x000000000043C000-memory.dmp
memory/4440-119-0x0000000004C10000-0x0000000004C11000-memory.dmp
memory/4440-123-0x0000000005BD0000-0x0000000005C5E000-memory.dmp
memory/4440-124-0x0000000008160000-0x00000000081C5000-memory.dmp
memory/4440-122-0x0000000004D80000-0x000000000527E000-memory.dmp
memory/4440-121-0x0000000004D50000-0x0000000004D60000-memory.dmp
memory/4440-120-0x0000000004EF0000-0x0000000004EF1000-memory.dmp
memory/4440-114-0x00000000002C0000-0x00000000002C1000-memory.dmp
memory/4440-118-0x0000000004D80000-0x0000000004D81000-memory.dmp
memory/4440-117-0x0000000005280000-0x0000000005281000-memory.dmp
memory/4440-116-0x0000000004C60000-0x0000000004C61000-memory.dmp