General

  • Target

    https://mega.nz/file/Iyk3zDYD#npEb-zUEZE8OWcDJGfwzHqBxcCEswOEKllWXbgUW9bM

  • Sample

    240905-prfwqa1bnr

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot7313933025:AAHouyLOfu1tAXngtnciu-autL9gI2FqI-I/sendMessage?chat_id=5597821522

https://api.telegram.org/bot7313933025:AAHouyLOfu1tAXngtnciu-autL9gI2FqI-I/getUpdate

https://api.telegram.org/bot7313933025:AAHouyLOfu1tAXngtnciu-autL9gI2FqI-I/getUpdates?offset=

https://api.telegram.org/bot7313933025:AAHouyLOfu1tAXngtnciu-autL9gI2FqI-I/getUpdates?offset=71347519

https://api.telegram.org/bot7313933025:AAHouyLOfu1tAXngtnciu-autL9gI2FqI-I/getUpdates?offset=71347520

https://api.telegram.org/bot7313933025:AAHouyLOfu1tAXngtnciu-autL9gI2FqI-I/getUpdates?offset=71347521

https://api.telegram.org/bot7313933025:AAHouyLOfu1tAXngtnciu-autL9gI2FqI-I/getUpdates?offset=71347522

Targets

    • Target

      https://mega.nz/file/Iyk3zDYD#npEb-zUEZE8OWcDJGfwzHqBxcCEswOEKllWXbgUW9bM

    • Gurcu, WhiteSnake

      Gurcu is a malware stealer written in C#.

    • Downloads MZ/PE file

    • Event Triggered Execution: Image File Execution Options Injection

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Checks whether UAC is enabled

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Legitimate hosting services abused for malware hosting/C2

    • Network Service Discovery

      Attempt to gather information on host's network.

    • Network Share Discovery

      Attempt to gather information on host network.

    • Checks system information in the registry

      System information is often read in order to detect sandboxing environments.

    • Drops file in System32 directory

    • Enumerates processes with tasklist

MITRE ATT&CK Matrix ATT&CK v13

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Event Triggered Execution

2
T1546

Image File Execution Options Injection

1
T1546.012

Component Object Model Hijacking

1
T1546.015

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Event Triggered Execution

2
T1546

Image File Execution Options Injection

1
T1546.012

Component Object Model Hijacking

1
T1546.015

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Modify Registry

3
T1112

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Discovery

Query Registry

8
T1012

System Information Discovery

8
T1082

Peripheral Device Discovery

2
T1120

Network Service Discovery

1
T1046

Network Share Discovery

1
T1135

Process Discovery

1
T1057

Browser Information Discovery

1
T1217

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

System Network Configuration Discovery

1
T1016

Internet Connection Discovery

1
T1016.001

System Time Discovery

1
T1124

Command and Control

Web Service

1
T1102

Tasks