Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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 9 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 28 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.

  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious use of WriteProcessMemory 4 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
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:2168
    • 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:2132

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    342B

    MD5

    8c50aad3a5dcb347af50abb54cdfc5d6

    SHA1

    7ddb116573b951e4f69dd357582b45e2a0bf353e

    SHA256

    8e6c12ea6b4e15ea21ae82b7f70da7d790a14caaa990347d3b6277177ebaccb1

    SHA512

    b689b78d1170968e897b045e94dae7f36d7f78b33b3a5c5725a51ed531122a3395f933933384449040295ec765549eebf6c7fa452aea4d649ede08c8de5fc53b

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

    Filesize

    342B

    MD5

    147b526867a5bcf8a9c1d94ac4f0efdf

    SHA1

    d9d38d435e015fc21da30382193dbac7f75b092f

    SHA256

    66e1e62ef100d080cdbf8d3f95a064b7402e30c43fddeac167086c5a4284ba5d

    SHA512

    129a902c551a45ab4553cb20cfc5cc966599ca7a7c617510ac1e4ee908fc30dd6f5e143da6f6586337af4532bbfed0a49897fd218c49ad1a9e284c650afb6f40

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\EOYL2MRI\search[1].htm

    Filesize

    25B

    MD5

    8ba61a16b71609a08bfa35bc213fce49

    SHA1

    8374dddcc6b2ede14b0ea00a5870a11b57ced33f

    SHA256

    6aa63394c1f5e705b1e89c55ff19eed71957e735c3831a845ff62f74824e13f1

    SHA512

    5855f5b2a78877f7a27ff92eaaa900d81d02486e6e2ea81d80b6f6cf1fe254350444980017e00cdeecdd3c67b86e7acc90cd2d77f06210bdd1d7b1a71d262df1

  • C:\Users\Admin\AppData\Local\Temp\CabB63D.tmp

    Filesize

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

  • C:\Users\Admin\AppData\Local\Temp\TarB71B.tmp

    Filesize

    181KB

    MD5

    4ea6026cf93ec6338144661bf1202cd1

    SHA1

    a1dec9044f750ad887935a01430bf49322fbdcb7

    SHA256

    8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

    SHA512

    6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

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

    Filesize

    28KB

    MD5

    a2c9a66fa3b17974d30b095d43489e1f

    SHA1

    0467ebe5d5a590c339d78b37f5d13a299c0c4f3d

    SHA256

    b927d476da8a330175e5c2a2aaeb1b36d3f81ec1c0a5b4a82e754a7f03211747

    SHA512

    c35c8cfc5083e3c0dae54e1a5b3859512e6e1b7013309692ddb07b37a0b29aedb9a9ef209d1040f37213b705004c60ea9f93f62fe69a7cfc20d5abbc15478919

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

    Filesize

    1KB

    MD5

    2ae13e407338f267d832d76416bdcf2b

    SHA1

    18111bb91b141960c4dde411c4067f000c0f9666

    SHA256

    091bd9d13f82b1360ef519fd8f8af1b1e2a3774e5276ab3900494201cdaa3a95

    SHA512

    cf2980e8b9236c104cf8da2349b357e2bbce3a81cf852a9bde1d1d9efc554bc6004a0943e4e7451890ef803120c31fe028cb913c2f7d95545ff024a993a7584c

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

    Filesize

    1KB

    MD5

    9775076093a2f0cfc6a7d868fa243e25

    SHA1

    30e885a6862d672eac3d8edbd058b7e35297755a

    SHA256

    085ea76158912e74da140e3300828e9d34c8d2f7c4d890d3266be46c86c0a5db

    SHA512

    17a80c9040e8f31c6bac5f79e3416f2822a19612bd764959bbe1a9c963d6adaa1d8c315a269c1c12d49a96c90425449a57dcc76b138a0b524c32e5c782d6a68c

  • C:\Windows\services.exe

    Filesize

    8KB

    MD5

    b0fe74719b1b647e2056641931907f4a

    SHA1

    e858c206d2d1542a79936cb00d85da853bfc95e2

    SHA256

    bf316f51d0c345d61eaee3940791b64e81f676e3bca42bad61073227bee6653c

    SHA512

    9c82e88264696d0dadef9c0442ad8d1183e48f0fb355a4fc9bf4fa5db4e27745039f98b1fd1febff620a5ded6dd493227f00d7d2e74b19757685aa8655f921c2

  • memory/2132-80-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2132-68-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2132-33-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2132-264-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2132-38-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2132-43-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2132-26-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2132-21-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2132-11-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2132-59-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2132-99-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2132-63-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2132-20-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2132-31-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2132-70-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2132-75-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2168-74-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2168-2-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2168-67-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2168-98-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2168-62-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2168-18-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2168-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2168-4-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2168-9-0x0000000000400000-0x0000000000408000-memory.dmp

    Filesize

    32KB

  • memory/2168-58-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2168-263-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2168-37-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB