General

  • Target

    4687334c1de102b96d6f0f34ccbfc3aa07465c4d2c4cb328cc3808794b607732

  • Size

    68KB

  • Sample

    230202-g6t3wsfc68

  • MD5

    5e458aefc13ee7f88e89530eac9dbb95

  • SHA1

    a1161199394f1a303c39b6ce8fc4749866bed921

  • SHA256

    4687334c1de102b96d6f0f34ccbfc3aa07465c4d2c4cb328cc3808794b607732

  • SHA512

    bff4013979c02f801839d7a04a0cce87bae1232e9859e4bb9e0d600076c7af33bfc338a91414e8981007818ec2e43d9c8829e83e69538cd5ec60a7a40e349cb2

  • SSDEEP

    96:5abhS0a8S2QYHdkMfcSBSGjmHCJoFAD4PF9MxM/bRrkQIOLFnU:cbhS0a8S2tH9lkCql99MxMDRAwu

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.aewwholesale.com
  • Port:
    2525
  • Username:
    dukas@aewwholesale.com
  • Password:
    clgn6qPzaP

Targets

    • Target

      INV-0097H.exe

    • Size

      6KB

    • MD5

      4a63e62a75447c399f717fd40805ada8

    • SHA1

      72a8c04321d4547c02464151ff585e5989d04d13

    • SHA256

      f5ee72bc3ed7127fdea098689d11b7c18f9bb5debbab5e4f5b0293b8017692e0

    • SHA512

      28ac8303385ad8888afee696bea516a2bc88dac8a857f67ef6640d7ed0363b596d048f21973dc933e35b9167948ec515a92a68b27e0901cb90aaf1212caff78c

    • SSDEEP

      96:zHdkMfcSBSGjmHCJoFAD4PF9MxM/bRrkQIOLFnU:zH9lkCql99MxMDRAwu

    • Detect PureCrypter injector

    • PureCrypter

      PureCrypter is a .NET malware loader first seen in early 2021.

    • Executes dropped EXE

    • Checks computer location settings

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

    • Loads dropped DLL

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of local email clients

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

    • Reads user/profile data of web browsers

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

    • Accesses Microsoft Outlook profiles

    • Adds Run key to start application

    • 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

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks