General

  • Target

    https://cdn.discordapp.com/attachments/1213539495215898745/1213578524061990972/OxyCracks_NL.zip?ex=65f5fc13&is=65e38713&hm=dbf6abb58f3a7a0bff1d75c9df68bb44f0758ad1bc62a2e1db656b5f30887a3a&

  • Sample

    240303-w2pd6sea51

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/1213552478973333615/HgqZhFkfFc23la94axmDeeor-_w_RVjs_T-hJoCsewm4NGKl8540wNg3DAdr43d0NjoV

Targets

    • Target

      https://cdn.discordapp.com/attachments/1213539495215898745/1213578524061990972/OxyCracks_NL.zip?ex=65f5fc13&is=65e38713&hm=dbf6abb58f3a7a0bff1d75c9df68bb44f0758ad1bc62a2e1db656b5f30887a3a&

    • 44Caliber

      An open source infostealer written in C#.

    • Modifies Windows Firewall

    • Checks computer location settings

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

    • Drops startup file

    • 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.

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Looks up external IP address via web service

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

    • Drops autorun.inf file

      Malware can abuse Windows Autorun to spread further via attached volumes.

    • Drops file in System32 directory

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Replication Through Removable Media

1
T1091

Persistence

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Privilege Escalation

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Defense Evasion

Impair Defenses

1
T1562

Disable or Modify System Firewall

1
T1562.004

Credential Access

Unsecured Credentials

2
T1552

Credentials In Files

2
T1552.001

Discovery

Query Registry

3
T1012

System Information Discovery

4
T1082

Process Discovery

1
T1057

Lateral Movement

Replication Through Removable Media

1
T1091

Collection

Data from Local System

2
T1005

Tasks