Overview

overview

10

Static

static

10

Client31231.exe

windows10-2004-x64

10

Client31231.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    Client31231.exe
  • Size 644KB
  • Sample261030-tkp82aew4l
  • SHA256 7ab599ef1f7ae516b5dbbb6f6bf244b460b6e81c17d22b24ffa92f832362b415
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
sheetratsheet_wvnkneyyxndiscoveryexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

  • sheetrat

Version

  • 2.6.4

Campaign

  • Sheet_wvnkneyyxn

Targets

    • Target
      Client31231.exe
    • Size 644KB
    • SHA256 7ab599ef1f7ae516b5dbbb6f6bf244b460b6e81c17d22b24ffa92f832362b415
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    sheet_wvnkneyyxndiscoveryexecutionsheetratpersistenceprivilege_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

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

      persistence
    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

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

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

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

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

2
T1112

Credential Access

Discovery

Browser Information Discovery

1
T1217

Query Registry

3
T1012

System Information Discovery

2
T1082

System Network Configuration Discovery

1
T1016

System Time Discovery

1
T1124

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks