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Analysis

  • max time kernel
    124s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    06/10/2023, 17:52

General

  • Target

    bLYU.exe

  • Size

    56KB

  • MD5

    99ac1041885d76a382b9a79e8c6cfe81

  • SHA1

    1e32ee6a17e9526d41832177ed2d765fac9b8753

  • SHA256

    001e2be0b431a33fbc7d0eb1fabd07d5c1cdba26ebef12e85b2a7ba58bdd995c

  • SHA512

    55158c15a94735bf2ad80d70ce255c55d5a08749ae0596229f7e27878a22add8c191d8e69c866f6d98270b3332ee8c3cde60ee7cfdc502dcd38c74fe844ce754

  • SSDEEP

    768:cFhVBuPWuUzEbOszEaN9B+7Bpe3GnAZQgS1m2LRRqsEbGlYFer7wiJncDqjP619s:nbOsQzBQ3GQQZ1TffEbGyC7wkn2O7nV

Score
10/10

Malware Config

Extracted

Family

xworm

Version

3.0

C2

18.231.156.119:7000

Attributes
  • install_file

    USB.exe

Signatures

  • Detect Xworm Payload 1 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Drops startup file 2 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bLYU.exe
    "C:\Users\Admin\AppData\Local\Temp\bLYU.exe"
    1⤵
    • Drops startup file
    • Suspicious use of AdjustPrivilegeToken
    PID:1436

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1436-0-0x0000000000390000-0x00000000003A4000-memory.dmp

    Filesize

    80KB

  • memory/1436-1-0x000007FEF5550000-0x000007FEF5F3C000-memory.dmp

    Filesize

    9.9MB

  • memory/1436-2-0x000000001B220000-0x000000001B2A0000-memory.dmp

    Filesize

    512KB

  • memory/1436-3-0x000007FEF5550000-0x000007FEF5F3C000-memory.dmp

    Filesize

    9.9MB

  • memory/1436-4-0x000000001B220000-0x000000001B2A0000-memory.dmp

    Filesize

    512KB