Overview

overview

10

Static

static

10

pastlavan.exe

windows10-2004-x64

10

Sharing

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General

  • Target
    pastlavan.exe
  • Size 1.2MB
  • Sample260731-sf27cscd55
  • SHA256 b2ec7b936fa2b7d6d0339a0085d0bdb63cc00aa7054eff3ba3c782b3db6a5117
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
quasardefense_evasionexecutionpersistencepyinstallerspywarestealertrojan

Malware Config

Extracted

Family

  • quasar

Attributes
  • encryption_key

    33A7029011B6BD4B067B8907EB238F25EFF233BF

  • key_salt

    5a23f8394640cb9e40658446a04c0bbae82dc93d0470e1b2a406a90fd2520382

  • reconnect_delay

    3000

Targets

    • Target
      pastlavan.exe
    • Size 1.2MB
    • SHA256 b2ec7b936fa2b7d6d0339a0085d0bdb63cc00aa7054eff3ba3c782b3db6a5117
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    defense_evasionexecutionquasarpersistencepyinstallerspywarestealertrojan

    • Family: Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

      spywarestealer

    • Adds Run key to start application

      persistence

    • Drops desktop.ini file(s)

    • Drops file in System32 directory

    • Hide Artifacts: Hidden Files and Directories

      defense_evasion
    behavioral1

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

Windows Command Shell

1
T1059.003

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Hide Artifacts

2
T1564

Hidden Files and Directories

2
T1564.001

Modify Registry

1
T1112

Credential Access

Credentials from Password Stores

1
T1555

Credentials from Web Browsers

1
T1555.003

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Data from Local System

1
T1005

Command and Control

Exfiltration

Impact

Tasks