Analysis
- max time kernel
91s - max time network
101s - platform
windows11-21h2_x64 - resource
win11-20240802-en - resource tags
- submitted
19/08/2024, 16:32
General
- Target nyen2eabmfb.exe
- Size 1.3MB
- Sample240819-t13jasvbma
- SHA256 994d73477a5e2a22bf00a7898bc2b8ad784ec844bc27dbc43c3aa5576d3ec397
Malware Config
Extracted
-
44caliber
-
https://discord.com/api/webhooks/1274462328603148298/RG8TQ5NOTPK7lllW9DXds8Z7Vj68QWZX7Duc-LfDNeqa_HouSEGlNyNzsrVH6EfQxrh8
Signatures
- 44Caliber
An open source infostealer written in C#.
- Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
- Executes dropped EXE 1 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: EnumeratesProcesses 5 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\nyen2eabmfb.exe"C:\Users\Admin\AppData\Local\Temp\nyen2eabmfb.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Insidious_protected.exe"C:\Users\Admin\AppData\Local\Temp\Insidious_protected.exe"2⤵
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3648 -s 16163⤵
- Program crash
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-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3648 -ip 36481⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Bookmarks.txt
Insidious_protected.exe
memory/3648-11-0x0000000000140000-0x00000000004FA000-memory.dmp
memory/3648-13-0x000000007460E000-0x000000007460F000-memory.dmp
memory/3648-14-0x0000000000140000-0x00000000004FA000-memory.dmp
memory/3648-15-0x0000000074600000-0x0000000074DB1000-memory.dmp
memory/3648-49-0x0000000000140000-0x00000000004FA000-memory.dmp
memory/3648-50-0x0000000074600000-0x0000000074DB1000-memory.dmp