Analysis
- max time kernel
126s - max time network
135s - platform
windows10-2004_x64 - resource
win10v2004-en-20220113 - submitted
13/04/2022, 09:03
General
- Target Confirmation Transfer Ref_0023456.exe
- Size 466KB
- Sample220413-kz4kjaager
- SHA256 420ee7de202cb5850277835114384bc2bd02dea4259849e61dd58f6a24f09c21
Malware Config
Extracted
-
Protocol
smtp
-
Host
smtp.mail.com
-
Port
587
-
Username
-
Password
More@12345
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
smtp.mail.com
-
Port
587
-
Username
-
Password
More@12345
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- 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\Confirmation Transfer Ref_0023456.exe"C:\Users\Admin\AppData\Local\Temp\Confirmation Transfer Ref_0023456.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\KdAEvWVGiHcmf" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCA91.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\Confirmation Transfer Ref_0023456.exe"{path}"2⤵
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
Confirmation Transfer Ref_0023456.exe.log
tmpCA91.tmp
memory/3744-130-0x0000000000510000-0x000000000058A000-memory.dmp
memory/3744-131-0x0000000005590000-0x0000000005B34000-memory.dmp
memory/3744-132-0x0000000004FE0000-0x0000000005072000-memory.dmp
memory/3744-133-0x0000000005080000-0x000000000511C000-memory.dmp
memory/3744-134-0x0000000005160000-0x000000000516A000-memory.dmp
memory/4296-138-0x0000000000400000-0x000000000043A000-memory.dmp
memory/4296-140-0x0000000005DB0000-0x0000000005E16000-memory.dmp
memory/4296-141-0x0000000006BD0000-0x0000000006C20000-memory.dmp