Overview

overview

10

Static

static

3

Payroll Li...at.exe

windows7-x64

10

Payroll Li...at.exe

windows10-2004-x64

10

$PLUGINSDI...em.dll

windows7-x64

3

$PLUGINSDI...em.dll

windows10-2004-x64

3

Sharing

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General

  • Target

    Payroll List_pdf.bat.exe

  • Size

    852KB

  • Sample

    250328-f8y9ystqz7

  • MD5

    55c905a0ec317664371b8ae3962d90cc

  • SHA1

    1cc73aeb68495a320d14b23c720d47167989b214

  • SHA256

    2edffaa16ba62436a4744e31d76dfaba8748534e4d6c752ca5b11949c25a4a7a

  • SHA512

    289368437de4ee377c7c63bf4ebcc4eb0cf1555b2dc780fa14638b06855322a9aa50527e02d3444f3886d6264bb0a2e3c384520721145c2570647f90ead16227

  • SSDEEP

    12288:JUjfTWyZA97KB+qmoSMfuiJp9vj/Xd53WiLwfheEAql6oIkJ/0DrQ:JUjfTsKB+a/f3Z53tLMGtQkQ

Score
10/10
guloaderremcosremotehostdiscoverydownloaderpersistencerat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

196.251.86.105:2404

Attributes
  • audio_folder

    MicRecords

  • audio_path

    ApplicationPath

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-MJDICZ

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      Payroll List_pdf.bat.exe

    • Size

      852KB

    • MD5

      55c905a0ec317664371b8ae3962d90cc

    • SHA1

      1cc73aeb68495a320d14b23c720d47167989b214

    • SHA256

      2edffaa16ba62436a4744e31d76dfaba8748534e4d6c752ca5b11949c25a4a7a

    • SHA512

      289368437de4ee377c7c63bf4ebcc4eb0cf1555b2dc780fa14638b06855322a9aa50527e02d3444f3886d6264bb0a2e3c384520721145c2570647f90ead16227

    • SSDEEP

      12288:JUjfTWyZA97KB+qmoSMfuiJp9vj/Xd53WiLwfheEAql6oIkJ/0DrQ:JUjfTsKB+a/f3Z53tLMGtQkQ

    Score
    10/10
    guloaderdiscoverydownloaderremcosremotehostpersistencerat

    • Guloader family

      guloader

    • Guloader,Cloudeye

      A shellcode based downloader first seen in 2020.

      downloaderguloader

    • Remcos

      Remcos is a closed-source remote control and surveillance software.

      ratremcos

    • Remcos family

      remcos

    • Detected Nirsoft tools

      Free utilities often used by attackers which can steal passwords, product keys, etc.

    • NirSoft MailPassView

      Password recovery tool for various email clients

    • NirSoft WebBrowserPassView

      Password recovery tool for various web browsers

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Legitimate hosting services abused for malware hosting/C2

    • Drops file in System32 directory

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    behavioral1behavioral2

    • Target

      $PLUGINSDIR/System.dll

    • Size

      11KB

    • MD5

      8b3830b9dbf87f84ddd3b26645fed3a0

    • SHA1

      223bef1f19e644a610a0877d01eadc9e28299509

    • SHA256

      f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37

    • SHA512

      d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03

    • SSDEEP

      192:ex24sihno00Wfl97nH6BenXwWobpWBTtvShJ5omi7dJWjOlESlS:h8QIl972eXqlWBFSt273YOlEz

    Score
    3/10
    discovery
    behavioral3behavioral4

MITRE ATT&CK Enterprise v15

Tasks