Analysis

  • max time kernel
    30s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230915-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-10-2023 04:08

General

  • Target

    ca77a885c5e62f0cda624be72bb3db4.exe

  • Size

    287KB

  • MD5

    f286b5883b7339bd2c4183540d7226a9

  • SHA1

    64d050aa949257a9623abaa88efc13817d1c10e5

  • SHA256

    854f1a294c0c0d5ece4903353fd4776eed29922e240fa97a8fbd8406e2a60798

  • SHA512

    cce1b5787ccab48877ff2e184ba088b33ac7e5293359cd10fe4bf193c8afbb0af2edb2944c8132cb4774eb7ae0abb0e998911357216ddedf5b8b3e4aa76d9e32

  • SSDEEP

    6144:DHClm6SWPoK5Z0EwVSmRPQk+e+5wX9bVLeLGOzN:DHCnZxb8Nm6iL7N

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot6176004110:AAFKA5be4dMwA848HWxzYIzrzzOGIHMOJGc/sendMessage?chat_id=615133582

Signatures

  • Gurcu, WhiteSnake

    Gurcu is a malware stealer 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 Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Looks up external IP address via web service 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ca77a885c5e62f0cda624be72bb3db4.exe
    "C:\Users\Admin\AppData\Local\Temp\ca77a885c5e62f0cda624be72bb3db4.exe"
    1⤵
    • Accesses Microsoft Outlook profiles
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • outlook_office_path
    • outlook_win_path
    PID:912

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/912-0-0x000001E85F330000-0x000001E85F37E000-memory.dmp

    Filesize

    312KB

  • memory/912-1-0x00007FFBDA430000-0x00007FFBDAEF1000-memory.dmp

    Filesize

    10.8MB

  • memory/912-2-0x000001E879910000-0x000001E879920000-memory.dmp

    Filesize

    64KB

  • memory/912-3-0x00007FFBDA430000-0x00007FFBDAEF1000-memory.dmp

    Filesize

    10.8MB

  • memory/912-4-0x000001E879910000-0x000001E879920000-memory.dmp

    Filesize

    64KB