Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20220715-en
  • resource tags

    arch:x64arch:x86image:win7-20220715-enlocale:en-usos:windows7-x64system
  • submitted
    05-08-2022 09:26

General

  • Target

    4cd864cf3d39baff963a023423237dd164ce0e5de001d1397031b74c3b26691e.exe

  • Size

    986KB

  • MD5

    e3e2371b9c9faa09afe127d0f0e12f3b

  • SHA1

    dfddf15a3f3f77cb5c4798eff4e3c529ad049db8

  • SHA256

    4cd864cf3d39baff963a023423237dd164ce0e5de001d1397031b74c3b26691e

  • SHA512

    1ea05e84d5cdeff9e5e9f4d1b829d8e11c30ae38a2a36c6c661239e93b6ce5e4610fce148cf0aadf6926136087e00d9dcbfcd1677717eb6905d8bebf3e6079d3

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

www.varshtrade.com:2404

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

    notepad

  • mouse_option

    false

  • mutex

    notepad-TFQMB3

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • ModiLoader, DBatLoader

    ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.

  • Remcos

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

  • ModiLoader Second Stage 45 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4cd864cf3d39baff963a023423237dd164ce0e5de001d1397031b74c3b26691e.exe
    "C:\Users\Admin\AppData\Local\Temp\4cd864cf3d39baff963a023423237dd164ce0e5de001d1397031b74c3b26691e.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:848
    • C:\Windows\SysWOW64\logagent.exe
      "C:\Windows\System32\logagent.exe"
      2⤵
        PID:1496

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    2
    T1112

    Install Root Certificate

    1
    T1130

    Discovery

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/848-106-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-70-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-69-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-72-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-73-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-71-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-94-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-74-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-78-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-77-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-76-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-75-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-82-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-81-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-80-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-79-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-83-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-84-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-117-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-87-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-86-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-88-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-89-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-116-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-85-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-67-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-115-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-96-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-97-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-98-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-99-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-100-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-101-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-102-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-104-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-103-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-54-0x0000000074FD1000-0x0000000074FD3000-memory.dmp
      Filesize

      8KB

    • memory/848-105-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-107-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-108-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-109-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-110-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-111-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-112-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-113-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/848-114-0x0000000004600000-0x00000000046B8000-memory.dmp
      Filesize

      736KB

    • memory/1496-118-0x0000000001F30000-0x0000000001FAE000-memory.dmp
      Filesize

      504KB

    • memory/1496-90-0x0000000000000000-mapping.dmp
    • memory/1496-91-0x0000000050600000-0x0000000050685000-memory.dmp
      Filesize

      532KB

    • memory/1496-95-0x0000000050600000-0x0000000050685000-memory.dmp
      Filesize

      532KB

    • memory/1496-119-0x0000000001F30000-0x0000000001FAE000-memory.dmp
      Filesize

      504KB