Overview

overview

10

Static

static

5

4a60656e1d...72.exe

windows10-2004-x64

10

4a60656e1d...72.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    4a60656e1dbaae45296c9660ee49081249081b1f82bcea639ef93e37a6c77572
  • Size 551KB
  • Sample261017-asbk3atvbw
  • SHA256 4a60656e1dbaae45296c9660ee49081249081b1f82bcea639ef93e37a6c77572
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
valleyrat_s2backdoordefense_evasiondiscoveryexecutionpersistencetrojanupx

Malware Config

Extracted

Family

  • valleyrat_s2

Version

  • 1.0

C2

  • 202.61.157.33:21357

Targets

    • Target
      4a60656e1dbaae45296c9660ee49081249081b1f82bcea639ef93e37a6c77572
    • Size 551KB
    • SHA256 4a60656e1dbaae45296c9660ee49081249081b1f82bcea639ef93e37a6c77572
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    backdoordefense_evasiondiscoveryexecutionvalleyrat_s2persistencetrojanupx

    • Detects ValleyRAT payload

    • Family: ValleyRat

      ValleyRat stage2 is a backdoor written in C++.

      backdoorvalleyrat_s2

    • UAC bypass

      defense_evasiontrojan

    • Executes dropped EXE

    • Adds Run key to start application

      persistence

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

      discovery

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • UPX packed file

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

      upx
    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

Windows Command Shell

1
T1059.003

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Modify Registry

3
T1112

Credential Access

Discovery

Peripheral Device Discovery

1
T1120

Query Registry

2
T1012

System Information Discovery

1
T1082

System Network Configuration Discovery

1
T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks