Analysis
- max time kernel
140s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20220310-en - submitted
26/03/2022, 17:07
General
- Target 959c997ad7beaa75558665d28c9684515da2f5d5cb69b7a5375e1acbe397dc9d.exe
- Size 790KB
- Sample220326-vmze6afcc2
- SHA256 959c997ad7beaa75558665d28c9684515da2f5d5cb69b7a5375e1acbe397dc9d
Malware Config
Extracted
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matiex
-
Protocol
ftp
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Host
ftp://ftp.minister-finance.com/
-
Port
21
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Username
-
Password
Dakar@911
Signatures
- Matiex
Matiex is a keylogger and infostealer first seen in July 2020.
- Matiex Main 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.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Drops startup file 1 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 web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- 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.
- Program crash 1 IoCs
- 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 10 IoCs
- Suspicious use of AdjustPrivilegeToken 2 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\959c997ad7beaa75558665d28c9684515da2f5d5cb69b7a5375e1acbe397dc9d.exe"C:\Users\Admin\AppData\Local\Temp\959c997ad7beaa75558665d28c9684515da2f5d5cb69b7a5375e1acbe397dc9d.exe"1⤵
- Checks BIOS information in registry
- Checks computer location settings
- 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\KmKrfVwAxR" /XML "C:\Users\Admin\AppData\Local\Temp\tmp339B.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\959c997ad7beaa75558665d28c9684515da2f5d5cb69b7a5375e1acbe397dc9d.exe"{path}"2⤵
- Drops startup file
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2192 -s 17243⤵
- Program crash
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-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 2192 -ip 21921⤵
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
959c997ad7beaa75558665d28c9684515da2f5d5cb69b7a5375e1acbe397dc9d.exe.log
tmp339B.tmp
memory/2192-144-0x0000000000400000-0x0000000000478000-memory.dmp
memory/3620-134-0x0000000000740000-0x000000000080E000-memory.dmp
memory/3620-135-0x000000000ADF0000-0x000000000B394000-memory.dmp
memory/3620-136-0x000000000AA20000-0x000000000AAB2000-memory.dmp
memory/3620-137-0x000000000A9F0000-0x000000000A9FA000-memory.dmp
memory/3620-138-0x000000000E270000-0x000000000E30C000-memory.dmp
memory/3620-139-0x000000000E840000-0x000000000ED6C000-memory.dmp
memory/3620-140-0x00000000011B0000-0x0000000001216000-memory.dmp