Analysis
- max time kernel
154s - max time network
160s - platform
windows10-2004_x64 - resource
win10v2004-20220331-en - submitted
13/04/2022, 16:18
General
- Target Invoice.exe
- Size 462KB
- Sample220413-trxlpadchr
- SHA256 c9a6fee2a5e5c3f750edcb73f658283c526f7514a2b28ef97ff07606b9918221
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
mail.butterflymotors.com
-
Port
587
-
Username
-
Password
#ifO^N=vn2j{
-
Email to
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Drops file in Drivers directory 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- 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 3 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Invoice.exe"C:\Users\Admin\AppData\Local\Temp\Invoice.exe"1⤵
- Checks computer location settings
- 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\rRKZucY" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF9B6.tmp"2⤵
- Creates scheduled task(s)
-
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C:\Users\Admin\AppData\Local\Temp\Invoice.exe"{path}"2⤵
- Drops file in Drivers directory
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
Invoice.exe.log
tmpF9B6.tmp
memory/1788-132-0x0000000000400000-0x000000000043A000-memory.dmp
memory/1788-134-0x0000000005A70000-0x0000000005AD6000-memory.dmp
memory/1788-135-0x00000000060C0000-0x0000000006110000-memory.dmp
memory/4192-124-0x0000000000810000-0x000000000088A000-memory.dmp
memory/4192-125-0x00000000058D0000-0x0000000005E74000-memory.dmp
memory/4192-126-0x0000000005320000-0x00000000053B2000-memory.dmp
memory/4192-127-0x00000000053C0000-0x000000000545C000-memory.dmp
memory/4192-128-0x0000000005220000-0x000000000522A000-memory.dmp