Analysis

  • max time kernel
    148s
  • max time network
    137s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-09-2024 14:07

General

  • Target

    mal.exe

  • Size

    483KB

  • MD5

    1f1dbf12b048ad53ceb7b62a1af1d60b

  • SHA1

    7843bc1228e3037ce39aab2710edf006cdddd919

  • SHA256

    d3a32f2258bd5eff952576259dd78a6e73f56d52d07783d4fbc3ffd966549950

  • SHA512

    2d263fecec7680c9647a8217561e6c61aa552c74978970d8cd132c29a3298eaa7b240cbd96e397683d81c4857fc95748389dc744a43d560642962877a5695f09

  • SSDEEP

    6144:QTz+c6KHYBhDc1RGJdv//NkUn+N5Bkf/0TELRvIZPjbsAOZZBAXccrJT4:QTlrYw1RUh3NFn+N5WfIQIjbs/ZBuT4

Malware Config

Extracted

Family

remcos

Botnet

zynova

C2

jramcos.duckdns.org:14645

Attributes
  • audio_folder

    MicRecords

  • 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

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-I5MYYN

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Detected Nirsoft tools 7 IoCs

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

  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\mal.exe
    "C:\Users\Admin\AppData\Local\Temp\mal.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:4536
    • C:\Users\Admin\AppData\Local\Temp\mal.exe
      C:\Users\Admin\AppData\Local\Temp\mal.exe /stext "C:\Users\Admin\AppData\Local\Temp\lehgnpplgudqmhksxzqoogs"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      PID:3092
    • C:\Users\Admin\AppData\Local\Temp\mal.exe
      C:\Users\Admin\AppData\Local\Temp\mal.exe /stext "C:\Users\Admin\AppData\Local\Temp\whmrnhafucwdpngwgkdprlmwgek"
      2⤵
      • Accesses Microsoft Outlook accounts
      • System Location Discovery: System Language Discovery
      PID:4460
    • C:\Users\Admin\AppData\Local\Temp\mal.exe
      C:\Users\Admin\AppData\Local\Temp\mal.exe /stext "C:\Users\Admin\AppData\Local\Temp\gbzjoalgqkohztuayuyrcyhfplbhdl"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:448

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\lehgnpplgudqmhksxzqoogs

    Filesize

    4KB

    MD5

    1891919175c888ce82e9bd8a047b01ad

    SHA1

    502a6892a5d27ecb791ac5aa6d8586944f540453

    SHA256

    a6c43b4e4b8681cf0ef56c49c730fa77e34dc82db0260253a3ba75039030b9ec

    SHA512

    8bb940050b1abf6c27db133ed446f41e108f670f361ed5102408832ce33d9b87cd0880723441f1632292eeeb0a319c4e0fac0ea659eb55ebe1130cc3e6c776a3

  • memory/448-16-0x0000000000430000-0x00000000004F9000-memory.dmp

    Filesize

    804KB

  • memory/448-17-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/448-9-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/448-14-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/448-12-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/3092-1-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3092-15-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3092-19-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3092-27-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3092-5-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/4460-13-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/4460-10-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/4460-3-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/4460-25-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/4460-8-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/4536-38-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/4536-30-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/4536-36-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/4536-35-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/4536-34-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/4536-33-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/4536-37-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB