Resubmissions
10/04/2024, 02:49
240410-da1n1sfe7v1010/04/2024, 02:49
240410-daz3gscc341010/04/2024, 02:48
240410-dazfyscc321010/04/2024, 02:48
240410-dayvesfe7s1014/10/2023, 03:45
231014-ea62gage6910Analysis
- max time kernel
210s - max time network
299s - platform
windows10-1703_x64 - resource
win10-20240404-en - resource tags
- submitted
10/04/2024, 02:48
General
- Target B9a5797cb584014f3fede.exe
- Size 530KB
- Sample240410-dayvesfe7s
- SHA256 44eca198c64197c511441f644895afd6a2777c28bcb6a376d4d4623b030ced31
Malware Config
Extracted
-
gurcu
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https://api.telegram.org/bot6176004110:AAFKA5be4dMwA848HWxzYIzrzzOGIHMOJGc/sendMessage?chat_id=615133582
Signatures
- Gurcu, WhiteSnake
Gurcu is a malware stealer written in C#.
- Executes dropped EXE 2 IoCs
- Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
- 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 6 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.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Runs ping.exe 1 TTPs 1 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 10 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\B9a5797cb584014f3fede.exe"C:\Users\Admin\AppData\Local\Temp\B9a5797cb584014f3fede.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "B9a5797cb584014f3fede" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\B9a5797cb584014f3fede.exe" &&START "" "C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\chcp.comchcp 650013⤵
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C:\Windows\system32\PING.EXEping 127.0.0.13⤵
- Runs ping.exe
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C:\Windows\system32\schtasks.exeschtasks /create /tn "B9a5797cb584014f3fede" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe"C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe"3⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious use of AdjustPrivilegeToken
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-
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C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exeC:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe1⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
B9a5797cb584014f3fede.exe.log
B9a5797cb584014f3fede.exe
port.dat
memory/484-23-0x0000024332FA0000-0x0000024332FB0000-memory.dmp
memory/484-22-0x00007FF80AF10000-0x00007FF80B8FC000-memory.dmp
memory/484-20-0x0000024332FA0000-0x0000024332FB0000-memory.dmp
memory/484-18-0x00007FF80AF10000-0x00007FF80B8FC000-memory.dmp
memory/2428-3-0x00007FF80AF10000-0x00007FF80B8FC000-memory.dmp
memory/2428-6-0x00007FF80AF10000-0x00007FF80B8FC000-memory.dmp
memory/2428-4-0x000001E747290000-0x000001E7472A0000-memory.dmp
memory/2428-0-0x000001E745650000-0x000001E7456DA000-memory.dmp
memory/4888-11-0x00007FF80AF10000-0x00007FF80B8FC000-memory.dmp
memory/4888-16-0x000001A5FB550000-0x000001A5FB560000-memory.dmp
memory/4888-15-0x00007FF80AF10000-0x00007FF80B8FC000-memory.dmp
memory/4888-12-0x000001A5FB550000-0x000001A5FB560000-memory.dmp