Analysis

  • max time kernel
    3s
  • max time network
    130s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-12-2023 14:05

General

  • Target

    39249782fb6fb673615770fe8f36219a.exe

  • Size

    252KB

  • MD5

    39249782fb6fb673615770fe8f36219a

  • SHA1

    6e50114fff5f7b8190ac291debde9fe3d5090810

  • SHA256

    19a6cd0047530783851a62b5924d67d04b543a7e9138677b8b9a284b1b019688

  • SHA512

    4c1de5a6222899e7a4f06c9b4196926413c515e8a0e717a162404e4b974ade8d14fffa64583f85a99ea344790a7d84568d49bd4db76afadfa9837c31ac9a8082

  • SSDEEP

    3072:T07eU2iSjjuUPFLpsXMZgPBU13oNod6bcN9ToZ8E2PBfH4Ekz1eaMjAmectmC3hS:geUyjPjmPBUqN26bWW8EUJY1z1eRbp0

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/856526465435697152/u6C6yH54AKjL86lTQVURmbO_Kg4SyX65anbK0NpzMF6jlDDJxFA1TSkqzPoYOkqLHrg0

Signatures

  • 44Caliber

    An open source infostealer written in C#.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Looks up external IP address via web service 2 IoCs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\39249782fb6fb673615770fe8f36219a.exe
    "C:\Users\Admin\AppData\Local\Temp\39249782fb6fb673615770fe8f36219a.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:3768

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/3768-0-0x0000000000860000-0x00000000008A6000-memory.dmp

    Filesize

    280KB

  • memory/3768-1-0x00007FF826000000-0x00007FF826AC1000-memory.dmp

    Filesize

    10.8MB

  • memory/3768-14-0x000000001B610000-0x000000001B620000-memory.dmp

    Filesize

    64KB

  • memory/3768-125-0x00007FF826000000-0x00007FF826AC1000-memory.dmp

    Filesize

    10.8MB