Analysis

  • max time kernel
    177s
  • max time network
    183s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-12-2023 02:57

General

  • Target

    016153c37340d7dd4d45563208a25928.exe

  • Size

    420KB

  • MD5

    016153c37340d7dd4d45563208a25928

  • SHA1

    591f8da7ede0f741c04ec18348999e7a39e96183

  • SHA256

    f41fc6480ca831a072c88d512b3ca96264c7d8652d30224b2f88465139dc8319

  • SHA512

    bdd7af6d07f38eae6e7500ac6d6d5175889e82a4d515025d6899049b1d56f46196d8a418e2b82a94865c7236a44e78f29af551548810f07fba1b6afce30e830f

  • SSDEEP

    6144:49g5p/aJJL7XJAnY7jioSgBK0Ru115xTcYeEknZJJAVAel:4gUJHX+nOjhBq1j2AWK

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
  • Obfuscated with Agile.Net obfuscator 4 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 29 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 22 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\016153c37340d7dd4d45563208a25928.exe
    "C:\Users\Admin\AppData\Local\Temp\016153c37340d7dd4d45563208a25928.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1520
    • 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:3992
      • 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:4932
    • 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⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3120
      • 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:1476
        • C:\Users\Admin\AppData\Local\ftermgr.exe
          "C:\Users\Admin\AppData\Local\ftermgr.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetWindowsHookEx
          PID:4528
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 1472
          4⤵
          • Program crash
          PID:3744
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 1476 -ip 1476
    1⤵
      PID:2504

    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\Temp\__PSScriptPolicyTest_15ryrsnu.rnv.ps1
      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

      420KB

      MD5

      016153c37340d7dd4d45563208a25928

      SHA1

      591f8da7ede0f741c04ec18348999e7a39e96183

      SHA256

      f41fc6480ca831a072c88d512b3ca96264c7d8652d30224b2f88465139dc8319

      SHA512

      bdd7af6d07f38eae6e7500ac6d6d5175889e82a4d515025d6899049b1d56f46196d8a418e2b82a94865c7236a44e78f29af551548810f07fba1b6afce30e830f

    • memory/1476-61-0x0000000074F30000-0x00000000756E0000-memory.dmp
      Filesize

      7.7MB

    • memory/1476-52-0x0000000005720000-0x0000000005730000-memory.dmp
      Filesize

      64KB

    • memory/1476-51-0x00000000062E0000-0x00000000062EA000-memory.dmp
      Filesize

      40KB

    • memory/1476-50-0x0000000005720000-0x0000000005730000-memory.dmp
      Filesize

      64KB

    • memory/1476-49-0x0000000074F30000-0x00000000756E0000-memory.dmp
      Filesize

      7.7MB

    • memory/1476-48-0x0000000005720000-0x0000000005730000-memory.dmp
      Filesize

      64KB

    • memory/1476-46-0x0000000005720000-0x0000000005730000-memory.dmp
      Filesize

      64KB

    • memory/1476-44-0x0000000001730000-0x0000000001746000-memory.dmp
      Filesize

      88KB

    • memory/1476-45-0x0000000074F30000-0x00000000756E0000-memory.dmp
      Filesize

      7.7MB

    • memory/1520-12-0x0000000003150000-0x0000000003160000-memory.dmp
      Filesize

      64KB

    • memory/1520-9-0x0000000074EB0000-0x0000000075660000-memory.dmp
      Filesize

      7.7MB

    • memory/1520-14-0x0000000005E30000-0x0000000005E38000-memory.dmp
      Filesize

      32KB

    • memory/1520-17-0x0000000074EB0000-0x0000000075660000-memory.dmp
      Filesize

      7.7MB

    • memory/1520-2-0x0000000000CE0000-0x0000000000D50000-memory.dmp
      Filesize

      448KB

    • memory/1520-3-0x00000000030D0000-0x00000000030E6000-memory.dmp
      Filesize

      88KB

    • memory/1520-4-0x0000000003150000-0x0000000003160000-memory.dmp
      Filesize

      64KB

    • memory/1520-5-0x0000000006500000-0x0000000006AA4000-memory.dmp
      Filesize

      5.6MB

    • memory/1520-6-0x0000000003140000-0x0000000003148000-memory.dmp
      Filesize

      32KB

    • memory/1520-13-0x0000000003150000-0x0000000003160000-memory.dmp
      Filesize

      64KB

    • memory/1520-7-0x0000000006050000-0x00000000060E2000-memory.dmp
      Filesize

      584KB

    • memory/1520-1-0x0000000074EB0000-0x0000000075660000-memory.dmp
      Filesize

      7.7MB

    • memory/1520-8-0x0000000006280000-0x0000000006288000-memory.dmp
      Filesize

      32KB

    • memory/1520-10-0x0000000006AB0000-0x0000000006AF4000-memory.dmp
      Filesize

      272KB

    • memory/1520-11-0x0000000003150000-0x0000000003160000-memory.dmp
      Filesize

      64KB

    • memory/3120-23-0x0000000006100000-0x0000000006166000-memory.dmp
      Filesize

      408KB

    • memory/3120-22-0x0000000005830000-0x0000000005852000-memory.dmp
      Filesize

      136KB

    • memory/3120-38-0x0000000006CD0000-0x0000000006CEA000-memory.dmp
      Filesize

      104KB

    • memory/3120-37-0x0000000006D40000-0x0000000006DD6000-memory.dmp
      Filesize

      600KB

    • memory/3120-36-0x0000000006840000-0x000000000688C000-memory.dmp
      Filesize

      304KB

    • memory/3120-35-0x00000000067F0000-0x000000000680E000-memory.dmp
      Filesize

      120KB

    • memory/3120-34-0x0000000006250000-0x00000000065A4000-memory.dmp
      Filesize

      3.3MB

    • memory/3120-47-0x0000000074F30000-0x00000000756E0000-memory.dmp
      Filesize

      7.7MB

    • memory/3120-24-0x00000000061E0000-0x0000000006246000-memory.dmp
      Filesize

      408KB

    • memory/3120-39-0x00000000079D0000-0x00000000079F2000-memory.dmp
      Filesize

      136KB

    • memory/3120-21-0x00000000058E0000-0x0000000005F08000-memory.dmp
      Filesize

      6.2MB

    • memory/3120-20-0x0000000005220000-0x0000000005256000-memory.dmp
      Filesize

      216KB

    • memory/3120-19-0x00000000052A0000-0x00000000052B0000-memory.dmp
      Filesize

      64KB

    • memory/3120-18-0x0000000074F30000-0x00000000756E0000-memory.dmp
      Filesize

      7.7MB

    • memory/4528-56-0x0000000000400000-0x0000000000420000-memory.dmp
      Filesize

      128KB

    • memory/4528-57-0x0000000000400000-0x0000000000420000-memory.dmp
      Filesize

      128KB

    • memory/4528-59-0x0000000000400000-0x0000000000420000-memory.dmp
      Filesize

      128KB

    • memory/4528-60-0x0000000000400000-0x0000000000420000-memory.dmp
      Filesize

      128KB

    • memory/4528-53-0x0000000000400000-0x0000000000420000-memory.dmp
      Filesize

      128KB