Overview

overview

10

Static

static

3

Sigmanly_3...55.exe

windows7-x64

10

Sigmanly_3...55.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    Sigmanly_386878a415d3edac8530e3b99769b40759bd105e3758b2c68887440e8890ee55

  • Size

    10.8MB

  • Sample

    250113-rs5ycavpbv

  • MD5

    55672946ffc3fa0b0c7670bf37d45225

  • SHA1

    669cba1aad9659aeff1a94b584b0e7ad3acb7c79

  • SHA256

    386878a415d3edac8530e3b99769b40759bd105e3758b2c68887440e8890ee55

  • SHA512

    24a9b4461cd2b6942c681a70a9aea88b4715d8f42498ae546453739bae1faab20ce7ec9a248be35141cabc715aaf932a2294bc3fdd228d58fee7fd6e9343e6e7

  • SSDEEP

    49152:Y7dvDhzETOIntW9y3yP2QAuxQzxEzwYjiwVTkO2kZBtk8hsuIm49DWm/S52LKN1o:

Score
10/10
dcratdiscoveryevasionexecutioninfostealerpersistenceratspywarestealer

Malware Config

Targets

    • Target

      Sigmanly_386878a415d3edac8530e3b99769b40759bd105e3758b2c68887440e8890ee55

    • Size

      10.8MB

    • MD5

      55672946ffc3fa0b0c7670bf37d45225

    • SHA1

      669cba1aad9659aeff1a94b584b0e7ad3acb7c79

    • SHA256

      386878a415d3edac8530e3b99769b40759bd105e3758b2c68887440e8890ee55

    • SHA512

      24a9b4461cd2b6942c681a70a9aea88b4715d8f42498ae546453739bae1faab20ce7ec9a248be35141cabc715aaf932a2294bc3fdd228d58fee7fd6e9343e6e7

    • SSDEEP

      49152:Y7dvDhzETOIntW9y3yP2QAuxQzxEzwYjiwVTkO2kZBtk8hsuIm49DWm/S52LKN1o:

    Score
    10/10
    dcratdiscoveryevasionexecutioninfostealerpersistenceratspywarestealer

    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

      ratinfostealerdcrat

    • Dcrat family

      dcrat

    • Modifies WinLogon for persistence

      persistence

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

      execution

    • Disables Task Manager via registry modification

      evasion

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

      spywarestealer

    • Adds Run key to start application

      persistence

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

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

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

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Modify Registry

3
T1112

Credential Access

Credentials from Password Stores

1
T1555

Credentials from Web Browsers

1
T1555.003

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

2
T1012

Remote System Discovery

1
T1018

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

System Network Configuration Discovery

1
T1016

Internet Connection Discovery

1
T1016.001

Lateral Movement

Collection

Data from Local System

1
T1005

Command and Control

Exfiltration

Impact

Tasks