Overview

overview

10

Static

static

3

Sirius.exe

windows10-ltsc 2021-x64

10

Sirius.exe

windows11-21h2-x64

10

Sharing

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General

  • Target

    Sirius.exe

  • Size

    2.4MB

  • Sample

    241206-m63b6atrbt

  • MD5

    e88e9ba128b0f902f05a24fc524b6642

  • SHA1

    aead6538e5762c1dce5aa5a823e6a897395dfab9

  • SHA256

    741f406af0d9813380255250f41bb4b5202575b0a95a5405b67520f5840393b1

  • SHA512

    276a779d33dcd77c6222c98b5cc3fcbd095216213eb77d4d4b898320b0805729561a7f45d279d54bc7abb16f2f816e531e6dbddf3f95401f0f39d9458b4fc942

  • SSDEEP

    24576:zTbBv5rUFz0sjTfN29w3R97qQqGv53D0pOuAw1sNv2pbP6inu0lPP1Y7QzqF:tBeHYiUm53D0mtv2pZFPPqUzs

Score
10/10
dcratdiscoveryinfostealerpersistencerat

Malware Config

Targets

    • Target

      Sirius.exe

    • Size

      2.4MB

    • MD5

      e88e9ba128b0f902f05a24fc524b6642

    • SHA1

      aead6538e5762c1dce5aa5a823e6a897395dfab9

    • SHA256

      741f406af0d9813380255250f41bb4b5202575b0a95a5405b67520f5840393b1

    • SHA512

      276a779d33dcd77c6222c98b5cc3fcbd095216213eb77d4d4b898320b0805729561a7f45d279d54bc7abb16f2f816e531e6dbddf3f95401f0f39d9458b4fc942

    • SSDEEP

      24576:zTbBv5rUFz0sjTfN29w3R97qQqGv53D0pOuAw1sNv2pbP6inu0lPP1Y7QzqF:tBeHYiUm53D0mtv2pZFPPqUzs

    Score
    10/10
    dcratdiscoveryinfostealerpersistencerat

    • 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.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Adds Run key to start application

      persistence

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

2
T1112

Credential Access

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

Command and Control

Exfiltration

Impact

Tasks