Analysis

  • max time kernel
    131s
  • max time network
    100s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-05-2024 03:46

General

  • Target

    8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1.exe

  • Size

    3.5MB

  • MD5

    050bfea963be8e25ad7a04a07198936d

  • SHA1

    6e24177fd9daf8f7979aaefd2d406a26adc9be6b

  • SHA256

    8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1

  • SHA512

    64aee4231e4cab19c2f958207ffcf391e006e1e32472559bf5973f82190170063c670aa0810a1731910dc48dd8d20751b31f3894ae16c818c16ef890580b26a5

  • SSDEEP

    98304:nEjlmQbfgSgwvSnN4iVJur0xM/licQBq4:nEjgQPXq0/xQBq4

Score
7/10

Malware Config

Signatures

  • Loads dropped DLL 1 IoCs
  • Enumerates connected drives 3 TTPs 1 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1.exe
    "C:\Users\Admin\AppData\Local\Temp\8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1.exe"
    1⤵
    • Loads dropped DLL
    • Enumerates connected drives
    • Writes to the Master Boot Record (MBR)
    • Suspicious behavior: EnumeratesProcesses
    PID:2952

Network

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Defense Evasion

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Discovery

Query Registry

1
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Tencent\TxGameAssistant\TGBDownloader\dr.dll
    Filesize

    74KB

    MD5

    2814acbd607ba47bdbcdf6ac3076ee95

    SHA1

    50ab892071bed2bb2365ca1d4bf5594e71c6b13b

    SHA256

    5904a7e4d97eeac939662c3638a0e145f64ff3dd0198f895c4bf0337595c6a67

    SHA512

    34c73014ffc8d38d6dd29f4f84c8f4f9ea971bc131f665f65b277f453504d5efc2d483a792cdea610c5e0544bf3997b132dcdbe37224912c5234c15cdb89d498