Overview

overview

10

Static

static

1

BE5-4532-a...29.ps1

windows10-2004-x64

10

BE5-4532-a...29.ps1

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    BE5-4532-a7E5-AE1a29
  • Size 632KB
  • Sample261102-g3f2vsfw41
  • SHA256 34a2f3bf3e131e794689b61d42c8415d0a9d5c1fd46e3aef12bb1f17f30db91c
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
acrstealerdefense_evasiondiscoveryexecutionprivilege_escalationspywarestealer

Malware Config

Extracted

Family

  • acrstealer

Version

  • 4.5.3-alpha1

C2

  • lb.birchcore.cc

Decoy

  • fastly.net

Attributes
  • guids

    f1575b64-8492-4e8b-b102-4d26e8c70371

    019fd84c-02e7-7a67-9097-4f73d632de4a

  • user_agent

    Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.2.6187.130 Safari/537.36

xor.hex

Targets

    • Target
      BE5-4532-a7E5-AE1a29
    • Size 632KB
    • SHA256 34a2f3bf3e131e794689b61d42c8415d0a9d5c1fd46e3aef12bb1f17f30db91c
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    defense_evasiondiscoveryexecutionacrstealerprivilege_escalationspywarestealer

    • Family: ACR stealer,GrMsk

      ACR stealer (aka GrMsk stealer) is an infostealer written in C++.

      stealeracrstealer

    • Suspicious use of NtCreateUserProcessOtherParentProcess

      defense_evasionprivilege_escalation

    • Badlisted process makes network request

      Network request originating from process or tool commonly abused by malware.

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

      spywarestealer

    • Reads user/profile data of web browsers

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

      spywarestealer
    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Persistence

Privilege Escalation

Access Token Manipulation

1
T1134

Parent PID Spoofing

1
T1134.004

Process Injection

1
T1055

Defense Evasion

Access Token Manipulation

1
T1134

Parent PID Spoofing

1
T1134.004

Process Injection

1
T1055

Credential Access

Credentials from Password Stores

1
T1555

Credentials from Web Browsers

1
T1555.003

Unsecured Credentials

2
T1552

Credentials In Files

2
T1552.001

Discovery

Browser Information Discovery

1
T1217

Query Registry

2
T1012

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

System Network Configuration Discovery

1
T1016

System Time Discovery

1
T1124

Lateral Movement

Collection

Data from Local System

2
T1005

Command and Control

Exfiltration

Impact

Tasks