Resubmissions
10/04/2024, 02:41
240410-c6hmmsfd7z1010/04/2024, 02:41
240410-c6g14scb461010/04/2024, 02:41
240410-c6gqcacb451010/04/2024, 02:41
240410-c6f4tacb441014/10/2023, 01:33
231014-bysbfahh6s10Analysis
- max time kernel
250s - max time network
299s - platform
windows10-1703_x64 - resource
win10-20240404-en - resource tags
- submitted
10/04/2024, 02:41
General
- Target x19a4f9f3d16fcc9779ba8ea79bf7.exe
- Size 392KB
- Sample240410-c6f4tacb44
- SHA256 c3439dd56bcf3921cdbfcbdff3f928d14ebd632b3411235657bf9f5452c1ab9d
Malware Config
Extracted
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gurcu
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https://api.telegram.org/bot6193093056:AAHzyNGUGS9aUG6CCx6ENLoXpCFLzEQywIQ/sendMessage?chat_id=1098292643
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
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C:\Users\Admin\AppData\Local\Temp\x19a4f9f3d16fcc9779ba8ea79bf7.exe"C:\Users\Admin\AppData\Local\Temp\x19a4f9f3d16fcc9779ba8ea79bf7.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 "x19a4f9f3d16fcc9779ba8ea79bf7" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\x19a4f9f3d16fcc9779ba8ea79bf7.exe" &&START "" "C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.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 "x19a4f9f3d16fcc9779ba8ea79bf7" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe"C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe"3⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exeC:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.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
x19a4f9f3d16fcc9779ba8ea79bf7.exe.log
x19a4f9f3d16fcc9779ba8ea79bf7.exe
port.dat
memory/220-16-0x00000219FF240000-0x00000219FF250000-memory.dmp
memory/220-11-0x00007FFFC2E00000-0x00007FFFC37EC000-memory.dmp
memory/220-12-0x00000219FF240000-0x00000219FF250000-memory.dmp
memory/220-15-0x00007FFFC2E00000-0x00007FFFC37EC000-memory.dmp
memory/4584-18-0x00007FFFC2E00000-0x00007FFFC37EC000-memory.dmp
memory/4584-19-0x000002753E110000-0x000002753E120000-memory.dmp
memory/4584-22-0x00007FFFC2E00000-0x00007FFFC37EC000-memory.dmp
memory/4584-23-0x000002753E110000-0x000002753E120000-memory.dmp
memory/4676-6-0x00007FFFC2E00000-0x00007FFFC37EC000-memory.dmp
memory/4676-2-0x00000157728C0000-0x00000157728D0000-memory.dmp
memory/4676-0-0x0000015758030000-0x0000015758098000-memory.dmp
memory/4676-1-0x00007FFFC2E00000-0x00007FFFC37EC000-memory.dmp