General

  • Target

    mn.exe

  • Size

    11.9MB

  • Sample

    210407-mets6hrzss

  • MD5

    387139f87dc3b8dd527bf15b64abd197

  • SHA1

    65e227af49ed8a2015e9e9723507e261c9187e23

  • SHA256

    39e6a32ee280960f6e4e2d4e38fb25e96ae8f5bd163bafb8ffeab87e2216e639

  • SHA512

    3a9ba9a823f21f5d7620698ae6c96ff32c6646110a8fa1c652c3e1e39e59f58904244d65e5f9cd5da6e408f7515f9db62b2f13c16a8e54489fc88e0780c70ade

Malware Config

Extracted

Credentials

  • Protocol:
    ftp
  • Host:
    193.32.188.10
  • Port:
    21
  • Username:
    alex
  • Password:
    easypassword

Targets

    • Target

      mn.exe

    • Size

      11.9MB

    • MD5

      387139f87dc3b8dd527bf15b64abd197

    • SHA1

      65e227af49ed8a2015e9e9723507e261c9187e23

    • SHA256

      39e6a32ee280960f6e4e2d4e38fb25e96ae8f5bd163bafb8ffeab87e2216e639

    • SHA512

      3a9ba9a823f21f5d7620698ae6c96ff32c6646110a8fa1c652c3e1e39e59f58904244d65e5f9cd5da6e408f7515f9db62b2f13c16a8e54489fc88e0780c70ade

    • Modifies Windows Defender Real-time Protection settings

    • Modifies visiblity of hidden/system files in Explorer

    • RMS

      Remote Manipulator System (RMS) is a remote access tool developed by Russian organization TektonIT.

    • UAC bypass

    • Windows security bypass

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

    • ACProtect 1.3x - 1.4x DLL software

      Detects file using ACProtect software.

    • Detected Stratum cryptominer command

      Looks to be attempting to contact Stratum mining pool.

    • Grants admin privileges

      Uses net.exe to modify the user's privileges.

    • XMRig Miner Payload

    • ASPack v2.12-2.42

      Detects executables packed with ASPack v2.12-2.42

    • Blocks application from running via registry modification

      Adds application to list of disallowed applications.

    • Drops file in Drivers directory

    • Executes dropped EXE

    • Modifies Windows Firewall

    • Sets DLL path for service in the registry

    • Sets file to hidden

      Modifies file attributes to stop it showing in Explorer etc.

    • Stops running service(s)

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Loads dropped DLL

    • Modifies file permissions

    • Adds Run key to start application

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

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

    • Modifies WinLogon

    • Drops file in System32 directory

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Command-Line Interface

1
T1059

Persistence

Modify Existing Service

3
T1031

Hidden Files and Directories

3
T1158

Account Manipulation

1
T1098

Registry Run Keys / Startup Folder

2
T1060

Winlogon Helper DLL

1
T1004

Scheduled Task

1
T1053

Privilege Escalation

Bypass User Account Control

1
T1088

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

8
T1112

Disabling Security Tools

3
T1089

Hidden Files and Directories

3
T1158

Bypass User Account Control

1
T1088

Impair Defenses

1
T1562

File Permissions Modification

1
T1222

Install Root Certificate

1
T1130

Discovery

System Information Discovery

3
T1082

Query Registry

1
T1012

Command and Control

Web Service

1
T1102

Impact

Service Stop

1
T1489

Tasks