Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    18-03-2024 13:13

General

  • Target

    d3994b1e2d7178cf1a0deacc455f3803.exe

  • Size

    420KB

  • MD5

    d3994b1e2d7178cf1a0deacc455f3803

  • SHA1

    e025ff3da6c3241453a36bb5209bfd898efe11f3

  • SHA256

    07731b7022fbbd94f460e546f38eb9f2be1ffeade82e04bda4803f12cf70a46b

  • SHA512

    93384ee33511ae4f1bc7b785071debdc150c6bd1dfaf59bea3f9ec54785d238995e062b4ec5770dc539cf471caeb0a24507c5d89a1d3d4d85086fd049ce034b9

  • SSDEEP

    6144:f9g5p/aJJL7XJAnY7jioSgBK0Ru115xTcYeEknZJJAVAe3:fgUJHX+nOjhBq1j2AWE

Malware Config

Extracted

Family

remcos

Version

2.5.0 Pro

Botnet

Buddy

C2

eastsidepapi.myq-see.com:6996

Attributes
  • audio_folder

    MicRecords

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    Buddy.exe

  • copy_folder

    remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    Buddy-PVO134

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Buddy

  • take_screenshot_option

    false

  • take_screenshot_time

    5

  • take_screenshot_title

    wikipedia;solitaire;

Signatures

  • Remcos

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

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 6 IoCs
  • Obfuscated with Agile.Net obfuscator 1 IoCs

    Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 31 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d3994b1e2d7178cf1a0deacc455f3803.exe
    "C:\Users\Admin\AppData\Local\Temp\d3994b1e2d7178cf1a0deacc455f3803.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2188
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v progmfil /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Local\ftermgr.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2700
      • C:\Windows\SysWOW64\reg.exe
        REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v progmfil /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Local\ftermgr.exe"
        3⤵
        • Adds Run key to start application
        PID:2536
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Start-Process C:\Users\Admin\AppData\Local\ftermgr.exe
      2⤵
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2124
      • C:\Users\Admin\AppData\Local\ftermgr.exe
        "C:\Users\Admin\AppData\Local\ftermgr.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2528
        • C:\Users\Admin\AppData\Local\ftermgr.exe
          "C:\Users\Admin\AppData\Local\ftermgr.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetWindowsHookEx
          PID:840
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2528 -s 932
          4⤵
          • Loads dropped DLL
          • Program crash
          PID:1956

Network

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Modify Registry

1
T1112

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\ftermgr.exe
    Filesize

    420KB

    MD5

    d3994b1e2d7178cf1a0deacc455f3803

    SHA1

    e025ff3da6c3241453a36bb5209bfd898efe11f3

    SHA256

    07731b7022fbbd94f460e546f38eb9f2be1ffeade82e04bda4803f12cf70a46b

    SHA512

    93384ee33511ae4f1bc7b785071debdc150c6bd1dfaf59bea3f9ec54785d238995e062b4ec5770dc539cf471caeb0a24507c5d89a1d3d4d85086fd049ce034b9

  • memory/840-35-0x0000000000400000-0x0000000000420000-memory.dmp
    Filesize

    128KB

  • memory/840-42-0x0000000000400000-0x0000000000420000-memory.dmp
    Filesize

    128KB

  • memory/840-41-0x0000000000400000-0x0000000000420000-memory.dmp
    Filesize

    128KB

  • memory/840-39-0x0000000000400000-0x0000000000420000-memory.dmp
    Filesize

    128KB

  • memory/840-38-0x0000000000400000-0x0000000000420000-memory.dmp
    Filesize

    128KB

  • memory/840-25-0x0000000000400000-0x0000000000420000-memory.dmp
    Filesize

    128KB

  • memory/840-33-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
    Filesize

    4KB

  • memory/840-32-0x0000000000400000-0x0000000000420000-memory.dmp
    Filesize

    128KB

  • memory/840-31-0x0000000000400000-0x0000000000420000-memory.dmp
    Filesize

    128KB

  • memory/840-30-0x0000000000400000-0x0000000000420000-memory.dmp
    Filesize

    128KB

  • memory/840-29-0x0000000000400000-0x0000000000420000-memory.dmp
    Filesize

    128KB

  • memory/840-27-0x0000000000400000-0x0000000000420000-memory.dmp
    Filesize

    128KB

  • memory/840-50-0x0000000000400000-0x0000000000420000-memory.dmp
    Filesize

    128KB

  • memory/2124-21-0x0000000074190000-0x000000007473B000-memory.dmp
    Filesize

    5.7MB

  • memory/2124-15-0x00000000025F0000-0x0000000002630000-memory.dmp
    Filesize

    256KB

  • memory/2124-13-0x0000000074190000-0x000000007473B000-memory.dmp
    Filesize

    5.7MB

  • memory/2124-14-0x0000000074190000-0x000000007473B000-memory.dmp
    Filesize

    5.7MB

  • memory/2188-6-0x00000000747C0000-0x0000000074EAE000-memory.dmp
    Filesize

    6.9MB

  • memory/2188-5-0x00000000009F0000-0x00000000009F8000-memory.dmp
    Filesize

    32KB

  • memory/2188-1-0x00000000747C0000-0x0000000074EAE000-memory.dmp
    Filesize

    6.9MB

  • memory/2188-2-0x0000000000820000-0x0000000000836000-memory.dmp
    Filesize

    88KB

  • memory/2188-3-0x0000000000980000-0x0000000000988000-memory.dmp
    Filesize

    32KB

  • memory/2188-0-0x0000000001230000-0x00000000012A0000-memory.dmp
    Filesize

    448KB

  • memory/2188-10-0x00000000747C0000-0x0000000074EAE000-memory.dmp
    Filesize

    6.9MB

  • memory/2188-9-0x0000000004890000-0x00000000048D0000-memory.dmp
    Filesize

    256KB

  • memory/2188-7-0x0000000000BE0000-0x0000000000BE8000-memory.dmp
    Filesize

    32KB

  • memory/2188-4-0x0000000004890000-0x00000000048D0000-memory.dmp
    Filesize

    256KB

  • memory/2528-24-0x00000000004C0000-0x00000000004CA000-memory.dmp
    Filesize

    40KB

  • memory/2528-20-0x0000000070230000-0x000000007091E000-memory.dmp
    Filesize

    6.9MB

  • memory/2528-22-0x00000000020C0000-0x0000000002100000-memory.dmp
    Filesize

    256KB

  • memory/2528-23-0x0000000070230000-0x000000007091E000-memory.dmp
    Filesize

    6.9MB

  • memory/2528-19-0x0000000000BE0000-0x0000000000C50000-memory.dmp
    Filesize

    448KB