Analysis

  • max time kernel
    59s
  • max time network
    60s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-01-2024 05:59

General

  • Target

    ZCCT.xlsx.exe

  • Size

    287KB

  • MD5

    828ec9e9d1fd89c29c09523f4553cf5b

  • SHA1

    c07d1c3695bde351f14cf610e6237877b02d5cec

  • SHA256

    d3492c1347976ac6e6cef64371d97351ec97ad8bac67d14d4be42bff471dc064

  • SHA512

    16d89e6c48e2d25598ad203a9b2810d514a72e0c5daf2aa9af45b556691161d427c73653158cd75b00698fb8dffde728fa643c1102b9f8fb181aa5f47120e1ee

  • SSDEEP

    6144:oloZM+rIkd8g+EtXHkv/iD4bTdZ1P8e1mFRAi/:2oZtL+EP8bT9K

Score
10/10

Malware Config

Signatures

  • Detect Umbral payload 1 IoCs
  • Umbral

    Umbral stealer is an opensource moduler stealer written in C#.

  • Suspicious use of AdjustPrivilegeToken 43 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ZCCT.xlsx.exe
    "C:\Users\Admin\AppData\Local\Temp\ZCCT.xlsx.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3828
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2608

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

  • memory/3828-0-0x0000022E78890000-0x0000022E788DE000-memory.dmp

    Filesize

    312KB

  • memory/3828-2-0x0000022E7AE30000-0x0000022E7AE40000-memory.dmp

    Filesize

    64KB

  • memory/3828-1-0x00007FFA4A780000-0x00007FFA4B241000-memory.dmp

    Filesize

    10.8MB

  • memory/3828-4-0x00007FFA4A780000-0x00007FFA4B241000-memory.dmp

    Filesize

    10.8MB