Analysis
- max time kernel
150s - max time network
153s - platform
windows10-2004_x64 - resource
win10v2004-20230220-en - resource tags
- submitted
15/03/2023, 22:49
General
- Target FEDEX - 2716436747964836.exe
- Size 256KB
- Sample230315-2rnmsaaa4s
- SHA256 af4962cafb502e71cf0e5c22dd57db11b6bfd380448f1fc2c9b2f1adcb5f47e6
Malware Config
Signatures
- Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
- Snake Keylogger payload 4 IoCs
- Executes dropped EXE 2 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 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
- Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 7 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\FEDEX - 2716436747964836.exe"C:\Users\Admin\AppData\Local\Temp\FEDEX - 2716436747964836.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\nkqpbn.exe"C:\Users\Admin\AppData\Local\Temp\nkqpbn.exe" C:\Users\Admin\AppData\Local\Temp\zrfsjy.gui2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\nkqpbn.exe"C:\Users\Admin\AppData\Local\Temp\nkqpbn.exe"3⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- 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
kyqxwbxje.vza
nkqpbn.exe
nkqpbn.exe
nkqpbn.exe
zrfsjy.gui
memory/448-149-0x0000000000400000-0x0000000000437000-memory.dmp
memory/448-153-0x0000000005310000-0x0000000005320000-memory.dmp
memory/448-145-0x0000000000400000-0x0000000000437000-memory.dmp
memory/448-147-0x00000000058D0000-0x0000000005E74000-memory.dmp
memory/448-148-0x00000000053C0000-0x000000000545C000-memory.dmp
memory/448-142-0x0000000000400000-0x0000000000437000-memory.dmp
memory/448-150-0x0000000005310000-0x0000000005320000-memory.dmp
memory/448-151-0x0000000005310000-0x0000000005320000-memory.dmp
memory/448-152-0x0000000005310000-0x0000000005320000-memory.dmp
memory/448-144-0x0000000000400000-0x0000000000437000-memory.dmp
memory/448-154-0x0000000006650000-0x0000000006812000-memory.dmp
memory/448-155-0x0000000006520000-0x00000000065B2000-memory.dmp
memory/448-156-0x00000000064F0000-0x00000000064FA000-memory.dmp
memory/448-157-0x0000000005310000-0x0000000005320000-memory.dmp
memory/448-158-0x0000000005310000-0x0000000005320000-memory.dmp
memory/448-159-0x0000000005310000-0x0000000005320000-memory.dmp
memory/448-160-0x0000000005310000-0x0000000005320000-memory.dmp