Resubmissions
10/04/2024, 02:25
240410-cwlljsbh991010/04/2024, 02:25
240410-cwlasafc5v1010/04/2024, 02:25
240410-cwkn9afc5t1010/04/2024, 02:25
240410-cwkdgsfc5s1014/10/2023, 04:25
231014-e12vfagc2y10Analysis
- max time kernel
190s - max time network
1810s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
10/04/2024, 02:25
General
- Target Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
- Size 289KB
- Sample240410-cwlljsbh99
- SHA256 41505242cdbf259aada52b773daeec33d239e4aefd685ba9e406d2cf2f9871a4
Malware Config
Extracted
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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#.
- Checks computer location settings 2 TTPs 5 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 8 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
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- 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 behavior: EnumeratesProcesses 1 IoCs
- Suspicious use of AdjustPrivilegeToken 5 IoCs
- Suspicious use of WriteProcessMemory 20 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\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe"C:\Users\Admin\AppData\Local\Temp\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe"1⤵
- Checks computer location settings
- 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 "Xd2c386a3a6edfe99de10f6ce6b3659c4809a" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe" &&START "" "C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.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 "Xd2c386a3a6edfe99de10f6ce6b3659c4809a" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe"C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe"3⤵
- Checks computer location settings
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\tar.exe"C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp8E17.tmp" -C "C:\Users\Admin\AppData\Local\xdh16uwiax"4⤵
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C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe"C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xdh16uwiax\torrc.txt"4⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exeC:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe1⤵
- Checks computer location settings
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
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C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe"C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xdh16uwiax\torrc.txt"2⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exeC:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe"C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xdh16uwiax\torrc.txt"2⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exeC:\Users\Admin\AppData\Local\Nvidia\Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe"C:\Users\Admin\AppData\Local\xdh16uwiax\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xdh16uwiax\torrc.txt"2⤵
- Executes dropped EXE
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe.log
Xd2c386a3a6edfe99de10f6ce6b3659c4809a.exe
tmp8E17.tmp
cached-microdesc-consensus.tmp
cached-microdescs.new
hostname
port.dat
tor.exe
torrc.txt
memory/1192-87-0x00000214B24E0000-0x00000214B24F0000-memory.dmp
memory/1192-86-0x00007FF837340000-0x00007FF837E01000-memory.dmp
memory/1192-89-0x00007FF837340000-0x00007FF837E01000-memory.dmp
memory/1204-2-0x000002297DAC0000-0x000002297DAD0000-memory.dmp
memory/1204-1-0x00007FF838880000-0x00007FF839341000-memory.dmp
memory/1204-6-0x00007FF838880000-0x00007FF839341000-memory.dmp
memory/1204-0-0x00000229633B0000-0x00000229633FE000-memory.dmp
memory/3892-108-0x00007FF837340000-0x00007FF837E01000-memory.dmp
memory/4644-12-0x000001A8D4880000-0x000001A8D4890000-memory.dmp
memory/4644-60-0x00007FF837340000-0x00007FF837E01000-memory.dmp
memory/4644-61-0x000001A8D4880000-0x000001A8D4890000-memory.dmp
memory/4644-11-0x00007FF837340000-0x00007FF837E01000-memory.dmp
memory/4856-99-0x00007FF837340000-0x00007FF837E01000-memory.dmp
memory/4856-100-0x000001E5C62C0000-0x000001E5C62D0000-memory.dmp
memory/4856-102-0x00007FF837340000-0x00007FF837E01000-memory.dmp