Resubmissions
10/04/2024, 02:52
240410-dcqxlaff2v1010/04/2024, 02:52
240410-dcqltscc721010/04/2024, 02:51
240410-dcm6pscc671010/04/2024, 02:51
240410-dcmj6scc661014/10/2023, 04:10
231014-erhp7sga6y10Analysis
- max time kernel
316s - max time network
389s - platform
windows10-1703_x64 - resource
win10-20240404-en - resource tags
- submitted
10/04/2024, 02:51
General
- Target f21559ac7c67d871d4f05.exe
- Size 327KB
- Sample240410-dcm6pscc67
- SHA256 dba8f020ac6d09728422932492657fea3f0a95754cd279f5a949b6982bd32129
Malware Config
Extracted
-
gurcu
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https://api.telegram.org/bot5968091729:AAHVag_ncx5c5AIYERGTqv9kr7clJT1_HDU/sendMessage?chat_id=-1001962300376
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 2 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\f21559ac7c67d871d4f05.exe"C:\Users\Admin\AppData\Local\Temp\f21559ac7c67d871d4f05.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 "f21559ac7c67d871d4f05" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\f21559ac7c67d871d4f05.exe" &&START "" "C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.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 "f21559ac7c67d871d4f05" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe"C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.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\f21559ac7c67d871d4f05.exeC:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.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
f21559ac7c67d871d4f05.exe.log
f21559ac7c67d871d4f05.exe
port.dat
memory/1716-1-0x00007FFE1D620000-0x00007FFE1E00C000-memory.dmp
memory/1716-4-0x000001A0D0160000-0x000001A0D0170000-memory.dmp
memory/1716-6-0x00007FFE1D620000-0x00007FFE1E00C000-memory.dmp
memory/1716-0-0x000001A0CE410000-0x000001A0CE468000-memory.dmp
memory/3772-23-0x000001BEE9F20000-0x000001BEE9F30000-memory.dmp
memory/3772-22-0x00007FFE1D620000-0x00007FFE1E00C000-memory.dmp
memory/3772-18-0x00007FFE1D620000-0x00007FFE1E00C000-memory.dmp
memory/3772-20-0x000001BEE9F20000-0x000001BEE9F30000-memory.dmp
memory/4316-12-0x0000025B91DA0000-0x0000025B91DB0000-memory.dmp
memory/4316-16-0x0000025B91DA0000-0x0000025B91DB0000-memory.dmp
memory/4316-15-0x00007FFE1D620000-0x00007FFE1E00C000-memory.dmp
memory/4316-11-0x00007FFE1D620000-0x00007FFE1E00C000-memory.dmp