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Analysis

  • max time kernel
    1800s
  • max time network
    1804s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230915-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-09-2023 14:18

General

  • Target

    dl2.exe

  • Size

    849KB

  • MD5

    c2055b7fbaa041d9f68b9d5df9b45edd

  • SHA1

    e4bd443bd4ce9029290dcd4bb47cb1a01f3b1b06

  • SHA256

    342f04c4720590c40d24078d46d9b19d8175565f0af460598171d58f5ffc48f3

  • SHA512

    18905b75938b8af9468b1aa3ffbae796a139c2762e623aa6ffb9ec2b293dd04aa1f90d1ed5a7dbda7853795a3688e368121a134c7f63e527a8e5e7679301a1dc

  • SSDEEP

    12288:A3RY3yNqMRTF4q2rxHn2ot/81xpNQyjUXlmoe7ufjHAtjXD7r2:A3RY3R24q+xn/8Xp2yOl5fzQ/2

Malware Config

Signatures

  • BazarBackdoor 64 IoCs

    Stealthy backdoor targeting corporate networks, believed to be developed by Trickbot's authors.

  • Tries to connect to .bazar domain 64 IoCs

    Attempts to lookup or connect to a .bazar domain, used by BazarBackdoor, Trickbot, and potentially others.

  • Unexpected DNS network traffic destination 64 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Creates a large amount of network flows 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dl2.exe
    "C:\Users\Admin\AppData\Local\Temp\dl2.exe"
    1⤵
    • BazarBackdoor
    • Modifies system certificate store
    • Suspicious use of SetWindowsHookEx
    PID:1464
  • C:\Users\Admin\AppData\Local\Temp\dl2.exe
    C:\Users\Admin\AppData\Local\Temp\dl2.exe {F81D6D3E-8E01-47F7-9AC6-6A8B644C8E34}
    1⤵
    • Suspicious use of SetWindowsHookEx
    PID:60

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/60-10-0x00000000020E0000-0x0000000002110000-memory.dmp

    Filesize

    192KB

  • memory/60-11-0x0000000000630000-0x0000000000730000-memory.dmp

    Filesize

    1024KB

  • memory/1464-1-0x0000000002230000-0x0000000002260000-memory.dmp

    Filesize

    192KB

  • memory/1464-2-0x0000000000620000-0x0000000000720000-memory.dmp

    Filesize

    1024KB

  • memory/1464-18-0x0000000000620000-0x0000000000720000-memory.dmp

    Filesize

    1024KB