Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-01-2025 05:45

General

  • Target

    letter.htm.exe

  • Size

    28KB

  • MD5

    14e6f2c43d8221938a964eeef9dd16f8

  • SHA1

    47c82ca2d8c4566d7847311dc7ce1756a9705caf

  • SHA256

    a095cd103481eb234975df1ee85eb2af7cd07e7eab865dda7795305b395b5dc7

  • SHA512

    cf7240689eb2011c921e0209377ca75dba2c4baf912f2d67f39329b8bf3358ddbe4ab0ae15a7734ddedac1893cb8acf4448f92604e1822a5bfe92db9acf0a9c6

  • SSDEEP

    384:1vxBbK26lj5Id8SpHx9jLhsznnVxA1WmP5w7GGCJlqqwMyNphe:Dv8IRRdsxq1DjJcqf4o

Malware Config

Signatures

  • Detects MyDoom family 5 IoCs
  • MyDoom

    MyDoom is a Worm that is written in C++.

  • Mydoom family
  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • UPX packed file 24 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Drops file in Windows directory 3 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\letter.htm.exe
    "C:\Users\Admin\AppData\Local\Temp\letter.htm.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3148
    • C:\Windows\services.exe
      "C:\Windows\services.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      PID:1592

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\321WJBEQ\search[2].htm

    Filesize

    25B

    MD5

    8ba61a16b71609a08bfa35bc213fce49

    SHA1

    8374dddcc6b2ede14b0ea00a5870a11b57ced33f

    SHA256

    6aa63394c1f5e705b1e89c55ff19eed71957e735c3831a845ff62f74824e13f1

    SHA512

    5855f5b2a78877f7a27ff92eaaa900d81d02486e6e2ea81d80b6f6cf1fe254350444980017e00cdeecdd3c67b86e7acc90cd2d77f06210bdd1d7b1a71d262df1

  • C:\Users\Admin\AppData\Local\Temp\tmp528B.tmp

    Filesize

    28KB

    MD5

    11ab27336c92689efffd21be5e788f31

    SHA1

    f9fa7f4aa91d9004e42e745aa0df3b633e163e95

    SHA256

    476c6b43a4fe7b11237ef8d4fdd8147c387b614effb20c84ff36dc0bf51dc04f

    SHA512

    87fd1e2e35ac6e6824948aa0ee67314cd647fda2ff5b54acd8be5a848a59c4c750fd5f3271c0ccee6bdfe7c51d811e39e9d936cc76ff92f1fd74f40893ff43e5

  • C:\Users\Admin\AppData\Local\Temp\zincite.log

    Filesize

    1KB

    MD5

    6b2db775883c1cf5181e0341df21639b

    SHA1

    18b9541de31a9a5816aeb5bfa966aa310622de72

    SHA256

    dffc8202b2bfc66e06947f500ab0972878ff93ccc80055cb832b169aa9b14e24

    SHA512

    1e44809f8b44665dbfadb49cd89b061e8b2712fbc555b76a56f0bde6c047279e1bf4a5b9f360dba6abbecf3028495bd903349abedbf016c2e42741773b8be129

  • C:\Users\Admin\AppData\Local\Temp\zincite.log

    Filesize

    1KB

    MD5

    4455a6ec74649183ba4de7f57a44f702

    SHA1

    56e166f94205a5bd8e044f93bfb24c289d8a0880

    SHA256

    e2ddb94b04d8347ad6ffd1ebeecb4b48b804d082258d163d54c8adcbda2a2664

    SHA512

    6051d77d74001fa1158f451e268096ade917acce193ec72b71771d352a56c0cf15a7ee66b79051b72ad1696776968d5f52aa9e87a3e96185e9274c41dc125d62

  • C:\Windows\services.exe

    Filesize

    8KB

    MD5

    b0fe74719b1b647e2056641931907f4a

    SHA1

    e858c206d2d1542a79936cb00d85da853bfc95e2

    SHA256

    bf316f51d0c345d61eaee3940791b64e81f676e3bca42bad61073227bee6653c

    SHA512

    9c82e88264696d0dadef9c0442ad8d1183e48f0fb355a4fc9bf4fa5db4e27745039f98b1fd1febff620a5ded6dd493227f00d7d2e74b19757685aa8655f921c2

  • memory/1592-50-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/1592-57-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/1592-26-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/1592-28-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/1592-33-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/1592-38-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/1592-40-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/1592-45-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/1592-183-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/1592-52-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/1592-172-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/1592-21-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/1592-16-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/1592-15-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/1592-6-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/1592-103-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/3148-102-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3148-13-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3148-171-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3148-56-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3148-182-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3148-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB