Analysis

  • max time kernel
    119s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    03-03-2024 01:08

General

  • Target

    Email-Worm/Merkur.exe

  • Size

    44KB

  • MD5

    e6f8f701d646b193139cf0a92229455f

  • SHA1

    b7747d41fcf52c3611af1153e46183dacbb3c709

  • SHA256

    7e89fabfdbe214bf6a6f9730f3e451e69f752b62bbd54c0a81d2aae2320abd2c

  • SHA512

    135d69ed4b3acdeaf45639090cefd48fa02f9ff1fb168d249717d0e2d3295530b697d8ff3fea84fa20a66aeb99437e5b0f2a2c3936f2a109c1068816263003ae

  • SSDEEP

    384:/T16PQm7lU7lnDSLOwglunEuMhlkW3YpCzkVei7kVrcwh8PDM9TkLJI4WvEfbqgJ:/hdmCJq1glWlOEDvEo2k/2w/mo

Score
5/10

Malware Config

Signatures

  • Drops file in System32 directory 15 IoCs
  • Drops file in Program Files directory 6 IoCs
  • Drops file in Windows directory 10 IoCs
  • Modifies Internet Explorer settings 1 TTPs 9 IoCs
  • Modifies registry class 64 IoCs
  • Runs .reg file with regedit 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Email-Worm\Merkur.exe
    "C:\Users\Admin\AppData\Local\Temp\Email-Worm\Merkur.exe"
    1⤵
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2008
    • C:\Windows\SysWOW64\regedit.exe
      regedit /s c:\Windows\system32\regme.reg
      2⤵
      • Runs .reg file with regedit
      PID:2596
  • C:\Program Files (x86)\Microsoft Office\Office14\OUTLOOK.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\OUTLOOK.EXE" -Embedding
    1⤵
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of SetWindowsHookEx
    PID:3012

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\FORMS\FRMCACHE.DAT

    Filesize

    240KB

    MD5

    1090c023b3430d417befe8305c5ed459

    SHA1

    b4a79c4070252e018301bd36170fbcaa5d406358

    SHA256

    7f70d53b9ad378b1c99eade15a50eb5bc12147897549c645c8fe93ff911eb4fa

    SHA512

    54bf7201e789f7ade2cfe5ce833e7f7fc188962b564e061b63188e8dc08ff3a415c2c9db460a0d17d01904b5e46618c9c27d802a29e47f52f8e899078940e878

  • C:\Users\Admin\AppData\Local\Microsoft\Outlook\mapisvc.inf

    Filesize

    1KB

    MD5

    48dd6cae43ce26b992c35799fcd76898

    SHA1

    8e600544df0250da7d634599ce6ee50da11c0355

    SHA256

    7bfe1f3691e2b4fb4d61fbf5e9f7782fbe49da1342dbd32201c2cc8e540dbd1a

    SHA512

    c1b9322c900f5be0ad166ddcfec9146918fb2589a17607d61490fd816602123f3af310a3e6d98a37d16000d4acbbcd599236f03c3c7f9376aeba7a489b329f31

  • C:\Windows\system\AVupdate.exe

    Filesize

    44KB

    MD5

    e6f8f701d646b193139cf0a92229455f

    SHA1

    b7747d41fcf52c3611af1153e46183dacbb3c709

    SHA256

    7e89fabfdbe214bf6a6f9730f3e451e69f752b62bbd54c0a81d2aae2320abd2c

    SHA512

    135d69ed4b3acdeaf45639090cefd48fa02f9ff1fb168d249717d0e2d3295530b697d8ff3fea84fa20a66aeb99437e5b0f2a2c3936f2a109c1068816263003ae

  • \??\c:\Windows\SysWOW64\regme.reg

    Filesize

    126B

    MD5

    1065f6f41c70e40297555b6d1878e823

    SHA1

    18b6b3b6da306b12c7b1f197d6242d2f66703023

    SHA256

    ab59535ddcea09a82c549ab4f72e0459cc57e41f5b887c42afde0a1dc1ae9947

    SHA512

    25aac67f601ad21878bd0c92bec8e68433dbdb05621f74d5d23c0b0db1960313e695ce6082abaa82e7ab922323e1fbdd0f9a484ae2cf01abecf431cb4bee5ea8

  • memory/3012-13-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/3012-14-0x0000000073FAD000-0x0000000073FB8000-memory.dmp

    Filesize

    44KB

  • memory/3012-114-0x000000006CF31000-0x000000006CF32000-memory.dmp

    Filesize

    4KB

  • memory/3012-140-0x0000000073FAD000-0x0000000073FB8000-memory.dmp

    Filesize

    44KB