Overview

overview

10

Static

static

10

Temp-WooferV4.exe

windows7-x64

7

Temp-WooferV4.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    Temp-WooferV4.exe

  • Size

    9.3MB

  • Sample

    240622-t2seqayeqm

  • MD5

    8bd99debc255e40897756021683bdfe9

  • SHA1

    a000a6dad9ca23548f87d7f306a63e2f5f64ada1

  • SHA256

    f0381c1a7c34cbb1b412a0bae5ea964b8ab99909ce69c860eeb7f42572974074

  • SHA512

    4b8ac0f0a5786b4d9f90866405f201e9b67a3c603ff9fdca2d9d95a0bfb851a684524c05914b80fc2ca80a92e37d2dc2623d879d3885e5e90deeb7271bc95b01

  • SSDEEP

    196608:OTdY36G7nfXYEOshoKMuIkhVastRL5Di3unSE71D7JY:+dY3drOshouIkPftRL54XARJY

Score
10/10
blankgrabberquasaroffice04defense_evasionexecutionspywaretrojanupx

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.0.141:4782

Mutex

ca9981fb-bc19-47a5-946e-2376fcf6334c

Attributes
  • encryption_key

    7D7FE45F9E650A16A4C100F9ADAAA1670E769835

  • install_name

    Windows Defender.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Defender

  • subdirectory

    SubDir

Targets

    • Target

      Temp-WooferV4.exe

    • Size

      9.3MB

    • MD5

      8bd99debc255e40897756021683bdfe9

    • SHA1

      a000a6dad9ca23548f87d7f306a63e2f5f64ada1

    • SHA256

      f0381c1a7c34cbb1b412a0bae5ea964b8ab99909ce69c860eeb7f42572974074

    • SHA512

      4b8ac0f0a5786b4d9f90866405f201e9b67a3c603ff9fdca2d9d95a0bfb851a684524c05914b80fc2ca80a92e37d2dc2623d879d3885e5e90deeb7271bc95b01

    • SSDEEP

      196608:OTdY36G7nfXYEOshoKMuIkhVastRL5Di3unSE71D7JY:+dY3drOshouIkPftRL54XARJY

    Score
    10/10
    upxquasaroffice04defense_evasionexecutionspywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Command and Scripting Interpreter: PowerShell

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

      execution

    • Executes dropped EXE

    • Loads dropped DLL

    • UPX packed file

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

      upx

    • Drops file in System32 directory

    • Hide Artifacts: Hidden Files and Directories

      defense_evasion
    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Hide Artifacts

2
T1564

Hidden Files and Directories

2
T1564.001

Credential Access

Discovery

System Information Discovery

1
T1082

Process Discovery

1
T1057

Query Registry

1
T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks