Overview

overview

10

Static

static

10

clun.exe

windows10-2004-x64

10

clun.exe

windows11-ltsc_2024-x64

10

Sharing

Copy URL Twitter E-mail

General

  • Target
    clun.exe
  • Size 325KB
  • Sample261002-vbprksee53
  • SHA256 cf28747dfa8d48f8367a3a32d1b00bd104d199a6a81c699566fc98d1730ed90e
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
sheetratsheet_refreshedsyfytxacmefxdiscoveryexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

  • sheetrat

Campaign

  • Sheet_Refreshedsyfytxacmefx

C2

  • stamina-launch.tun.ply.gg:60372

Targets

    • Target
      clun.exe
    • Size 325KB
    • SHA256 cf28747dfa8d48f8367a3a32d1b00bd104d199a6a81c699566fc98d1730ed90e
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    sheet_refreshedsyfytxacmefxdiscoveryexecutionsheetratpersistenceprivilege_escalationtrojan

    • Detects Sheetrat obfuscated V1.8 and higher

      Sheetrat aka NonEuclid RAT is a trojan written in C#.

    • Detects Sheetrat obfuscated version

    • Family: Sheetrat, NonEuclid rat

      Sheetrat aka NonEuclid RAT is a trojan written in C#.

      trojansheetrat

    • Modifies WinLogon for persistence

      persistence

    • Event Triggered Execution: AppInit DLLs

      Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.

      persistenceprivilege_escalation

    • Checks computer location settings

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

    • Executes dropped EXE

    • Drops desktop.ini file(s)

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

Windows Command Shell

1
T1059.003

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Boot or Logon Autostart Execution

1
T1547

Winlogon Helper DLL

1
T1547.004

Event Triggered Execution

1
T1546

AppInit DLLs

1
T1546.010

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Winlogon Helper DLL

1
T1547.004

Event Triggered Execution

1
T1546

AppInit DLLs

1
T1546.010

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

System Network Configuration Discovery

1
T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks