Analysis

  • max time kernel
    117s
  • max time network
    128s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    29-02-2024 14:44

General

  • Target

    aec46d8da7a1c5e06d6ceadb8691dbe3.xlsb

  • Size

    116KB

  • MD5

    aec46d8da7a1c5e06d6ceadb8691dbe3

  • SHA1

    477a896c207c3b1ebc866f9862aa481bcf8c001c

  • SHA256

    2b1206d427d4676f608ce841f7e847fd9949ab8457d66a3071e9408321e86434

  • SHA512

    27ec53772b17325e0c2937ed165a5d493ba01cee54d6a5b7b6a94330d7c728ae464b922d10429c3595bd6b355bf1309242182d8b5821b9b8eb08861c7807525a

  • SSDEEP

    3072:oUanAhD3TysKYZM8i63LD6z2qoaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa3RY3/:oDAh3PKYo67Moaaaaaaaaaaaaaaaaaal

Score
10/10

Malware Config

Signatures

  • Process spawned unexpected child process 2 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • Blocklisted process makes network request 3 IoCs
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 32 IoCs
  • Modifies registry class 64 IoCs
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 40 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\aec46d8da7a1c5e06d6ceadb8691dbe3.xlsb
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1664
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic process call create 'mshta C:\ProgramData\YKCdakNtTmr.sct'
      2⤵
      • Process spawned unexpected child process
      • Suspicious use of AdjustPrivilegeToken
      PID:2608
  • C:\Windows\system32\mshta.exe
    mshta C:\ProgramData\YKCdakNtTmr.sct
    1⤵
    • Process spawned unexpected child process
    • Blocklisted process makes network request
    • Modifies Internet Explorer settings
    • Modifies system certificate store
    PID:2160

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\YKCdakNtTmr.sct

    Filesize

    14KB

    MD5

    ddce19b9903f579aa00f77b4b3676ac3

    SHA1

    c47755e7a82979aa272f0b7b5de4cb4ab12e72a7

    SHA256

    8880191127574faf1694bd8619faabde8ffdf1e961f86f5002d6797fe376d1e3

    SHA512

    40b186ff3157ed33532d970377be1ad78c996ee1f120f7ab304f96e6afbfcd4b863e9d982932f061d244305986eb417fe08f7a0d03e122d333f421d72dc0a958

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

    Filesize

    67KB

    MD5

    753df6889fd7410a2e9fe333da83a429

    SHA1

    3c425f16e8267186061dd48ac1c77c122962456e

    SHA256

    b42dc237e44cbc9a43400e7d3f9cbd406dbdefd62bfe87328f8663897d69df78

    SHA512

    9d56f79410ad0cf852c74c3ef9454e7ae86e80bdd6ff67773994b48ccac71142bcf5c90635da6a056e1406e81e64674db9584928e867c55b77b59e2851cf6444

  • C:\Users\Admin\AppData\Local\Temp\Tar9A44.tmp

    Filesize

    175KB

    MD5

    dd73cead4b93366cf3465c8cd32e2796

    SHA1

    74546226dfe9ceb8184651e920d1dbfb432b314e

    SHA256

    a6752b7851b591550e4625b832a393aabcc428de18d83e8593cd540f7d7cae22

    SHA512

    ce1bdd595065c94fa528badf4a6a8777893807d6789267612755df818ba6ffe55e4df429710aea29526ee4aa8ef20e25f2f05341da53992157d21ae032c0fb63

  • memory/1664-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/1664-1-0x00000000729BD000-0x00000000729C8000-memory.dmp

    Filesize

    44KB

  • memory/1664-57-0x00000000729BD000-0x00000000729C8000-memory.dmp

    Filesize

    44KB

  • memory/1664-60-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/1664-61-0x00000000729BD000-0x00000000729C8000-memory.dmp

    Filesize

    44KB