Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    26-06-2022 05:15

General

  • Target

    185rms.exe

  • Size

    2.8MB

  • MD5

    6cfceeb676d49151e8c2fec9c4209789

  • SHA1

    42c87894f183c3612e1662f531003bbe7478f875

  • SHA256

    a2fad2958e6dd09d0d980d4e5d158c2a2eb18963d47fc95779c22bc2d203cb8e

  • SHA512

    a371d0b6f4bed336e01b6025cc584f27f939f0fea9f92e36aa63295164e31eebccf24cdae24e04fcbdb0545169454d3b9944630c2cfde49dd8681496005cac89

Malware Config

Extracted

Family

remcos

Botnet

RH1

C2

185.29.9.125:2404

Attributes
  • audio_folder

    MicRecords

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    itunes.exe

  • copy_folder

    RMS

  • delete_file

    true

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    Jd1985-XODZWD

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Rms

  • take_screenshot_option

    false

  • take_screenshot_time

    5

  • take_screenshot_title

    notepad;solitaire;

Signatures

  • Remcos

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

  • UAC bypass 3 TTPs 2 IoCs
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Checks BIOS information in registry 2 TTPs 6 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Deletes itself 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Themida packer 43 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Adds Run key to start application 2 TTPs 4 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry key 1 TTPs 2 IoCs
  • Suspicious use of WriteProcessMemory 46 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\185rms.exe
    "C:\Users\Admin\AppData\Local\Temp\185rms.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of WriteProcessMemory
    PID:1884
    • C:\Windows\SysWOW64\cmd.exe
      /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1260
      • C:\Windows\SysWOW64\reg.exe
        C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        3⤵
        • UAC bypass
        • Modifies registry key
        PID:620
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1312
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\RMS\itunes.exe"
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:912
        • C:\Users\Admin\AppData\Roaming\RMS\itunes.exe
          C:\Users\Admin\AppData\Roaming\RMS\itunes.exe
          4⤵
          • Identifies VirtualBox via ACPI registry values (likely anti-VM)
          • Executes dropped EXE
          • Checks BIOS information in registry
          • Adds Run key to start application
          • Checks whether UAC is enabled
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:456
          • C:\Windows\SysWOW64\cmd.exe
            /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:1088
            • C:\Windows\SysWOW64\reg.exe
              C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
              6⤵
              • UAC bypass
              • Modifies registry key
              PID:996
          • C:\Windows\SysWOW64\svchost.exe
            C:\Windows\SysWOW64\svchost.exe
            5⤵
            • Identifies VirtualBox via ACPI registry values (likely anti-VM)
            • Checks BIOS information in registry
            • Suspicious use of NtSetInformationThreadHideFromDebugger
            PID:980

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Bypass User Account Control

1
T1088

Defense Evasion

Bypass User Account Control

1
T1088

Disabling Security Tools

1
T1089

Modify Registry

3
T1112

Virtualization/Sandbox Evasion

1
T1497

Discovery

Query Registry

2
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

3
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\install.vbs
    Filesize

    536B

    MD5

    9f75de802bf74aeb51ff665f8d009420

    SHA1

    16bf08edffd90ff78e409e8461cc9b6b12ceb93b

    SHA256

    753ec32a971c16ea202a0f8ebb7bce551b5ff8d8c546f26bdf4a3069a5c50c48

    SHA512

    bf1df2ce961e0ddd2a741228cc9dafed88ffc447145e553a49f101e475cd99910c7d114c8cdd18d6ce05eb9684d28666d44ca2800d9f5d64e553372663f0242f

  • C:\Users\Admin\AppData\Roaming\RMS\itunes.exe
    Filesize

    2.8MB

    MD5

    6cfceeb676d49151e8c2fec9c4209789

    SHA1

    42c87894f183c3612e1662f531003bbe7478f875

    SHA256

    a2fad2958e6dd09d0d980d4e5d158c2a2eb18963d47fc95779c22bc2d203cb8e

    SHA512

    a371d0b6f4bed336e01b6025cc584f27f939f0fea9f92e36aa63295164e31eebccf24cdae24e04fcbdb0545169454d3b9944630c2cfde49dd8681496005cac89

  • C:\Users\Admin\AppData\Roaming\RMS\itunes.exe
    Filesize

    2.8MB

    MD5

    6cfceeb676d49151e8c2fec9c4209789

    SHA1

    42c87894f183c3612e1662f531003bbe7478f875

    SHA256

    a2fad2958e6dd09d0d980d4e5d158c2a2eb18963d47fc95779c22bc2d203cb8e

    SHA512

    a371d0b6f4bed336e01b6025cc584f27f939f0fea9f92e36aa63295164e31eebccf24cdae24e04fcbdb0545169454d3b9944630c2cfde49dd8681496005cac89

  • \Users\Admin\AppData\Roaming\RMS\itunes.exe
    Filesize

    2.8MB

    MD5

    6cfceeb676d49151e8c2fec9c4209789

    SHA1

    42c87894f183c3612e1662f531003bbe7478f875

    SHA256

    a2fad2958e6dd09d0d980d4e5d158c2a2eb18963d47fc95779c22bc2d203cb8e

    SHA512

    a371d0b6f4bed336e01b6025cc584f27f939f0fea9f92e36aa63295164e31eebccf24cdae24e04fcbdb0545169454d3b9944630c2cfde49dd8681496005cac89

  • \Users\Admin\AppData\Roaming\RMS\itunes.exe
    Filesize

    2.8MB

    MD5

    6cfceeb676d49151e8c2fec9c4209789

    SHA1

    42c87894f183c3612e1662f531003bbe7478f875

    SHA256

    a2fad2958e6dd09d0d980d4e5d158c2a2eb18963d47fc95779c22bc2d203cb8e

    SHA512

    a371d0b6f4bed336e01b6025cc584f27f939f0fea9f92e36aa63295164e31eebccf24cdae24e04fcbdb0545169454d3b9944630c2cfde49dd8681496005cac89

  • memory/456-77-0x0000000000990000-0x00000000010AF000-memory.dmp
    Filesize

    7.1MB

  • memory/456-79-0x0000000000990000-0x00000000010AF000-memory.dmp
    Filesize

    7.1MB

  • memory/456-78-0x0000000000990000-0x00000000010AF000-memory.dmp
    Filesize

    7.1MB

  • memory/456-76-0x0000000000990000-0x00000000010AF000-memory.dmp
    Filesize

    7.1MB

  • memory/456-80-0x0000000000990000-0x00000000010AF000-memory.dmp
    Filesize

    7.1MB

  • memory/456-73-0x0000000000000000-mapping.dmp
  • memory/456-122-0x0000000000990000-0x00000000010AF000-memory.dmp
    Filesize

    7.1MB

  • memory/456-123-0x0000000077600000-0x0000000077780000-memory.dmp
    Filesize

    1.5MB

  • memory/620-63-0x0000000000000000-mapping.dmp
  • memory/912-81-0x00000000020F0000-0x000000000280F000-memory.dmp
    Filesize

    7.1MB

  • memory/912-121-0x00000000020F0000-0x000000000280F000-memory.dmp
    Filesize

    7.1MB

  • memory/912-69-0x0000000000000000-mapping.dmp
  • memory/980-89-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-112-0x0000000077600000-0x0000000077780000-memory.dmp
    Filesize

    1.5MB

  • memory/980-125-0x0000000077600000-0x0000000077780000-memory.dmp
    Filesize

    1.5MB

  • memory/980-124-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-120-0x0000000000401000-0x0000000000454000-memory.dmp
    Filesize

    332KB

  • memory/980-119-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-118-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-117-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-116-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-115-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-84-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-114-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-87-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-113-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-90-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-91-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-92-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-94-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-96-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-97-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-98-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-100-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-102-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-103-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-104-0x000000000089B058-mapping.dmp
  • memory/980-107-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-108-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-109-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-110-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/980-111-0x0000000000400000-0x0000000000B1F000-memory.dmp
    Filesize

    7.1MB

  • memory/996-85-0x0000000000000000-mapping.dmp
  • memory/1088-82-0x0000000000000000-mapping.dmp
  • memory/1260-62-0x0000000000000000-mapping.dmp
  • memory/1312-64-0x0000000000000000-mapping.dmp
  • memory/1884-60-0x0000000000330000-0x0000000000A4F000-memory.dmp
    Filesize

    7.1MB

  • memory/1884-59-0x0000000077600000-0x0000000077780000-memory.dmp
    Filesize

    1.5MB

  • memory/1884-54-0x0000000075191000-0x0000000075193000-memory.dmp
    Filesize

    8KB

  • memory/1884-61-0x0000000000330000-0x0000000000A4F000-memory.dmp
    Filesize

    7.1MB

  • memory/1884-58-0x0000000000330000-0x0000000000A4F000-memory.dmp
    Filesize

    7.1MB

  • memory/1884-57-0x0000000000330000-0x0000000000A4F000-memory.dmp
    Filesize

    7.1MB

  • memory/1884-56-0x0000000000330000-0x0000000000A4F000-memory.dmp
    Filesize

    7.1MB

  • memory/1884-55-0x0000000000330000-0x0000000000A4F000-memory.dmp
    Filesize

    7.1MB

  • memory/1884-66-0x0000000077600000-0x0000000077780000-memory.dmp
    Filesize

    1.5MB

  • memory/1884-65-0x0000000000330000-0x0000000000A4F000-memory.dmp
    Filesize

    7.1MB