Analysis
- max time kernel
145s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-en-20220113 - submitted
21/02/2022, 22:30
General
- Target NKP210102-NIT-SC2.exe
- Size 779KB
- Sample220221-2fa8babbh4
- SHA256 af8629a317a5fe7aa5900f445cd855b902a495c497646c3ef1485ea5a9d026a7
Malware Config
Extracted
-
Protocol
smtp
-
Host
mail.revistaeducar.com.ar
-
Port
25
-
Username
-
Password
somchai#3774
Extracted
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matiex
-
Protocol
smtp
-
Host
mail.revistaeducar.com.ar
-
Port
25
-
Username
-
Password
somchai#3774
Signatures
- Matiex
Matiex is a keylogger and infostealer first seen in July 2020.
- Matiex Main Payload 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 1 IoCs
- Drops file in Windows directory 6 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 1 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 7 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\NKP210102-NIT-SC2.exe"C:\Users\Admin\AppData\Local\Temp\NKP210102-NIT-SC2.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\kVTLnkXYUzFB" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE9F.tmp"2⤵
- Creates scheduled task(s)
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"{path}"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
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-
C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/3008-130-0x0000000000660000-0x0000000000728000-memory.dmp
memory/3008-131-0x0000000005710000-0x0000000005CB4000-memory.dmp
memory/3008-132-0x00000000050B0000-0x0000000005142000-memory.dmp
memory/3008-133-0x0000000074F6E000-0x0000000074F6F000-memory.dmp
memory/3008-134-0x0000000005290000-0x000000000529A000-memory.dmp
memory/3008-135-0x00000000052D0000-0x00000000052D1000-memory.dmp
memory/3008-139-0x00000000061D0000-0x000000000626C000-memory.dmp
memory/3420-138-0x0000024E26990000-0x0000024E26994000-memory.dmp
memory/3420-137-0x0000024E24320000-0x0000024E24330000-memory.dmp
memory/3420-136-0x0000024E23D60000-0x0000024E23D70000-memory.dmp
memory/4000-141-0x0000000000400000-0x0000000000472000-memory.dmp
memory/4000-142-0x0000000005830000-0x0000000005896000-memory.dmp
memory/4000-144-0x0000000005930000-0x0000000005931000-memory.dmp
memory/4000-143-0x0000000074F6E000-0x0000000074F6F000-memory.dmp
memory/4000-145-0x00000000074B0000-0x0000000007672000-memory.dmp