Overview

overview

10

Static

static

10

Client.exe

windows11-21h2-x64

10

Sharing

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General

  • Target
    Client.exe
  • Size 580KB
  • Sample260830-sv5k2acb76
  • SHA256 647d43e783c39105a555e961b2b7de1367015e2577cd0c313a19745eb4f7de8d
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
sheetratsheet_nbszmiyxtaxdiscoveryexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

  • sheetrat

Campaign

  • Sheet_nbszmiyxtax

C2

  • KarmaNastignet-37101.portmap.host:37101

  • tcp.cloudpub.ru:29227

Targets

    • Target
      Client.exe
    • Size 580KB
    • SHA256 647d43e783c39105a555e961b2b7de1367015e2577cd0c313a19745eb4f7de8d
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    sheet_nbszmiyxtaxdiscoveryexecutionsheetratpersistenceprivilege_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

    • Loads dropped DLL

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

      discovery
    behavioral1

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

1
T1012

System Network Configuration Discovery

1
T1016

Internet Connection Discovery

1
T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks