General

  • Target

    48ad7db5fb10dd9b1c6817d5a9c34865

  • Size

    2.2MB

  • Sample

    240107-l3a8tsbgf8

  • MD5

    48ad7db5fb10dd9b1c6817d5a9c34865

  • SHA1

    2fd68670f13f6335a2361fbdd7ed6c36b9f4863c

  • SHA256

    44cf30bb3e4623c4374ab4132bd419d3a63f119b36eaf66f1a5258e36df3b60a

  • SHA512

    7782826d586098b94e2c10a801881e0104784406d9d496c98b2932a33b28f2b0724be7eb25f158223f84483795b4bb768f7e2ad15799c9cb4b2577888909c3fb

  • SSDEEP

    49152:pSezyzdsk+1US6FOZyj2Zi8kwUP+9uNMYuv+ShQFZS:pSdsk+ySemg2Iw0+YChv+Shx

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/850985103400108043/qMVlcxRCEtOy4d0lLo-ckGGqIgWka8O5mwrGC7NwW7qRJs5beglorhRUk-uRy4jQ1Cbz

Targets

    • Target

      48ad7db5fb10dd9b1c6817d5a9c34865

    • Size

      2.2MB

    • MD5

      48ad7db5fb10dd9b1c6817d5a9c34865

    • SHA1

      2fd68670f13f6335a2361fbdd7ed6c36b9f4863c

    • SHA256

      44cf30bb3e4623c4374ab4132bd419d3a63f119b36eaf66f1a5258e36df3b60a

    • SHA512

      7782826d586098b94e2c10a801881e0104784406d9d496c98b2932a33b28f2b0724be7eb25f158223f84483795b4bb768f7e2ad15799c9cb4b2577888909c3fb

    • SSDEEP

      49152:pSezyzdsk+1US6FOZyj2Zi8kwUP+9uNMYuv+ShQFZS:pSdsk+ySemg2Iw0+YChv+Shx

    • 44Caliber

      An open source infostealer written in C#.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Identifies Wine through registry keys

      Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Checks whether UAC is enabled

    • 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 NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v13

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Credential Access

Unsecured Credentials

2
T1552

Credentials In Files

2
T1552.001

Discovery

Query Registry

5
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

5
T1082

Collection

Data from Local System

2
T1005

Tasks