Overview

overview

10

Static

static

8

1.xlsm

windows7-x64

10

1.xlsm

windows10-2004-x64

10

Sharing

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General

  • Target

    1.xlsm

  • Size

    42KB

  • Sample

    230127-la1m1sbe5t

  • MD5

    9567cc095b840a0156939bd14bd60d1b

  • SHA1

    bc066fb87caf1ea2dd5e710210a40371f83945b5

  • SHA256

    6dace0bce0139f7a90be79aaa73a97df7903fc31ddbed4ba16a7712e0d20a9d7

  • SHA512

    434558080df7752ee37bf738f3e73abff7f1f19c43dd9f99f7d5623caedcb9fd70c798922798d0b00ee23bf8b824ce5c972602cb96f8bb7e9899e8bcd7554be6

  • SSDEEP

    768:RZvptTvBssn/24oBIJYfTH+niSpFvDHz0v+nW6FFiKk/fGqtCAwgRy+nQ+1N:bvHvBTfoG1BnTz0v+hFFi3/eqE5gzQ+f

Score
10/10
quasarsuccessmacropersistencespywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

SUCCESS

C2

41.185.97.216:4782

Mutex

MUTEX_QAxMFzrXWG2cbIHPGK

Attributes
  • encryption_key

    JRUJdiIOmPJ5LlsFaVs9

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    cmd

  • subdirectory

    SubDir

Targets

    • Target

      1.xlsm

    • Size

      42KB

    • MD5

      9567cc095b840a0156939bd14bd60d1b

    • SHA1

      bc066fb87caf1ea2dd5e710210a40371f83945b5

    • SHA256

      6dace0bce0139f7a90be79aaa73a97df7903fc31ddbed4ba16a7712e0d20a9d7

    • SHA512

      434558080df7752ee37bf738f3e73abff7f1f19c43dd9f99f7d5623caedcb9fd70c798922798d0b00ee23bf8b824ce5c972602cb96f8bb7e9899e8bcd7554be6

    • SSDEEP

      768:RZvptTvBssn/24oBIJYfTH+niSpFvDHz0v+nW6FFiKk/fGqtCAwgRy+nQ+1N:bvHvBTfoG1BnTz0v+hFFi3/eqE5gzQ+f

    Score
    10/10
    quasarsuccesspersistencespywaretrojan

    • Modifies WinLogon for persistence

      persistence

    • Process spawned unexpected child process

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

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Looks up external IP address via web service

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

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1
T1053

Persistence

Winlogon Helper DLL

1
T1004

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

2
T1112

Credential Access

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks