General

  • Target

    https://cdn.discordapp.com/attachments/1212416322160300103/1212779220468498492/OxyProjNL.rar?ex=6674ef6a&is=66739dea&hm=aaa39f26eb4804817f2fed307720d0a1c0b8e0503b4606e92c97ecfc05843958&

  • Sample

    240620-ksfvwsyeka

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/1208790119046193243/eZ9zjLPvHd-FRJsahjqgqZrRSsKnYitSyY6Wf_DhXU7Uan_6NaWZpaFcBn-LdnE8QCGt

Targets

    • Target

      https://cdn.discordapp.com/attachments/1212416322160300103/1212779220468498492/OxyProjNL.rar?ex=6674ef6a&is=66739dea&hm=aaa39f26eb4804817f2fed307720d0a1c0b8e0503b4606e92c97ecfc05843958&

    • 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

    • 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

    • Looks up external IP address via web service

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

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Privilege Escalation

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

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

4
T1012

System Information Discovery

4
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

2
T1005

Tasks