Analysis
- max time kernel
155s - max time network
173s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
21/05/2022, 00:58
General
- Target Quotation #257&439.exe
- Size 376KB
- Sample220521-bbxmmsefgp
- SHA256 302ef66c9868c12a36517bd2ee12254442b7504d17afdeabdc9264954e19a952
Malware Config
Extracted
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matiex
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Protocol
smtp
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Host
smtp.yandex.com
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Port
587
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Username
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Password
welcome@100
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.
- 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.
- 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 4 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\Quotation #257&439.exe"C:\Users\Admin\AppData\Local\Temp\Quotation #257&439.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\UNxuZSpnXyss" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA662.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Quotation #257&439.exe"{path}"2⤵
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
Quotation #257&439.exe.log
tmpA662.tmp
memory/3856-130-0x0000000000140000-0x00000000001A4000-memory.dmp
memory/3856-131-0x0000000007550000-0x0000000007AF4000-memory.dmp
memory/3856-132-0x0000000007040000-0x00000000070D2000-memory.dmp
memory/3856-133-0x0000000007020000-0x000000000702A000-memory.dmp
memory/3856-134-0x0000000009510000-0x00000000095AC000-memory.dmp
memory/3856-135-0x0000000000820000-0x0000000000886000-memory.dmp
memory/4108-139-0x0000000000400000-0x0000000000474000-memory.dmp