Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-12-2024 18:04

General

  • Target

    4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe

  • Size

    856KB

  • MD5

    b7b504ea022610fe69940fd54fd2bc27

  • SHA1

    8cb39de97c36eb8328436ffe21be24742925e652

  • SHA256

    4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87

  • SHA512

    4f38f6ff589cb607c2cbd5be4be78c5dffe9f03723ec9c9eee9c606b9a8143ade83dbd3c2639f2401ee47232b899fb9dbe9dde7fea5196c31483d2b552f4b313

  • SSDEEP

    24576:KdeRzboLmkwWQ6Q2l/4SPTIXkORnLeV35YryHC:CyO37l5TkzRLePYryHC

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.210.150.26:8787

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

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-R1T905

  • 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.

  • Remcos family
  • Detected Nirsoft tools 4 IoCs

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

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Drops startup file 2 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Suspicious use of SetThreadContext 4 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe
    "C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3844
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
      "Powershell.exe" -ExecutionPolicy Bypass -command Copy-Item 'C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe' 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.exe'
      2⤵
      • Drops startup file
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3400
    • C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe
      "C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1732
      • C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe
        C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe /stext "C:\Users\Admin\AppData\Local\Temp\buwmdtlyyhcrme"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:4924
      • C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe
        C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe /stext "C:\Users\Admin\AppData\Local\Temp\lxjewmwsupuwxkofh"
        3⤵
        • Suspicious use of UnmapMainImage
        PID:2120
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2120 -s 12
          4⤵
          • Program crash
          PID:4676
      • C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe
        C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe /stext "C:\Users\Admin\AppData\Local\Temp\orppxeotiymjzqkjrcjw"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1172
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 2120 -ip 2120
    1⤵
      PID:2172

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\remcos\logs.dat

      Filesize

      124B

      MD5

      e1bf4fd2439c57652a9b333b449e2098

      SHA1

      99a227498c2ff59417d5917c70f8a2a03254e436

      SHA256

      89943a24bcfdcbde6775a009dc0dbba209d157f21235b16bb59be7c124f857f4

      SHA512

      e907cac2cf715fb568e4a0aa2a85c36cb51ff0527c4db71425ccf1918f932c0fdec66e773f6e4d9062bae0dec6f35ee86e5919afd97a9b659cd1285be967921d

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cafe5c2g.cn3.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

      Filesize

      4KB

      MD5

      60a0bdc1cf495566ff810105d728af4a

      SHA1

      243403c535f37a1f3d5f307fc3fb8bdd5cbcf6e6

      SHA256

      fd12da9f9b031f9fa742fa73bbb2c9265f84f49069b7c503e512427b93bce6d2

      SHA512

      4445f214dbf5a01d703f22a848b56866f3f37b399de503f99d40448dc86459bf49d1fa487231f23c080a559017d72bcd9f6c13562e1f0bd53c1c9a89e73306a5

    • memory/1172-53-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1172-52-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1172-50-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1732-85-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-27-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-94-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-93-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-78-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-77-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-74-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-102-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-73-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-71-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/1732-72-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/1732-68-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/1732-25-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-86-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-28-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-34-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-32-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-29-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-101-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-110-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-38-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-37-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-39-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-40-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-42-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1732-109-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2120-47-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/3400-19-0x0000000005DA0000-0x0000000005E06000-memory.dmp

      Filesize

      408KB

    • memory/3400-26-0x0000000005FE0000-0x0000000006334000-memory.dmp

      Filesize

      3.3MB

    • memory/3400-8-0x0000000004E30000-0x0000000004E66000-memory.dmp

      Filesize

      216KB

    • memory/3400-44-0x0000000007550000-0x00000000075E6000-memory.dmp

      Filesize

      600KB

    • memory/3400-9-0x0000000074D70000-0x0000000075520000-memory.dmp

      Filesize

      7.7MB

    • memory/3400-48-0x00000000068F0000-0x0000000006912000-memory.dmp

      Filesize

      136KB

    • memory/3400-36-0x00000000063E0000-0x000000000642C000-memory.dmp

      Filesize

      304KB

    • memory/3400-45-0x00000000068A0000-0x00000000068BA000-memory.dmp

      Filesize

      104KB

    • memory/3400-10-0x0000000074D70000-0x0000000075520000-memory.dmp

      Filesize

      7.7MB

    • memory/3400-61-0x0000000074D70000-0x0000000075520000-memory.dmp

      Filesize

      7.7MB

    • memory/3400-11-0x00000000055C0000-0x0000000005BE8000-memory.dmp

      Filesize

      6.2MB

    • memory/3400-35-0x0000000006390000-0x00000000063AE000-memory.dmp

      Filesize

      120KB

    • memory/3400-12-0x0000000005410000-0x0000000005432000-memory.dmp

      Filesize

      136KB

    • memory/3400-18-0x00000000054B0000-0x0000000005516000-memory.dmp

      Filesize

      408KB

    • memory/3844-24-0x0000000005400000-0x0000000005408000-memory.dmp

      Filesize

      32KB

    • memory/3844-6-0x0000000005580000-0x000000000562E000-memory.dmp

      Filesize

      696KB

    • memory/3844-0-0x0000000074D7E000-0x0000000074D7F000-memory.dmp

      Filesize

      4KB

    • memory/3844-67-0x0000000074D70000-0x0000000075520000-memory.dmp

      Filesize

      7.7MB

    • memory/3844-65-0x0000000074D7E000-0x0000000074D7F000-memory.dmp

      Filesize

      4KB

    • memory/3844-1-0x00000000007C0000-0x000000000089C000-memory.dmp

      Filesize

      880KB

    • memory/3844-2-0x0000000005850000-0x0000000005DF4000-memory.dmp

      Filesize

      5.6MB

    • memory/3844-3-0x0000000005340000-0x00000000053D2000-memory.dmp

      Filesize

      584KB

    • memory/3844-4-0x00000000052B0000-0x00000000052BA000-memory.dmp

      Filesize

      40KB

    • memory/3844-7-0x0000000005720000-0x00000000057BC000-memory.dmp

      Filesize

      624KB

    • memory/3844-5-0x0000000074D70000-0x0000000075520000-memory.dmp

      Filesize

      7.7MB

    • memory/4924-54-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/4924-51-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/4924-49-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/4924-43-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/4924-63-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB