Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    03-02-2023 18:49

General

  • Target

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe

  • Size

    7KB

  • MD5

    b359f4af5c88b1e237db9738415b7682

  • SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

  • SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

  • SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • SSDEEP

    96:xtEsKVeCVIP7bLp8LAn5c8aY1ej/kKV+J2qzNt:xUVVIP7bLrEOejcKYx

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

194.180.49.17:28282

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    rdfghfgjkgoighjc.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-PC1DJ2

  • 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

  • Detect PureCrypter injector 1 IoCs
  • PureCrypter

    PureCrypter is a .NET malware loader first seen in early 2021.

  • Remcos

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

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 10 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 42 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
    "C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2008
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:940
    • C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
      C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
      2⤵
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:924
      • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
        "C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe"
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1080
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1956
        • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
          C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
          4⤵
          • Executes dropped EXE
          PID:1748
        • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
          C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetWindowsHookEx
          PID:1872

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
    Filesize

    7KB

    MD5

    b90126aef2c0f27ec479d24425e74323

    SHA1

    d9558ca1f433d0b2c88e4b0224a06729bb316509

    SHA256

    c8e6d79f8e269e2cafe08b93ede2a2435623045b427616266c45f170e4f3d368

    SHA512

    058d632446fb4c3be1bde001160bc20fb38e4deff3da004d1754f3ea1797e0fabe5a692a9cc8fe664bb4cfc2a4f3c4c8a209e3407a56790201007b8296590e8a

  • C:\Users\Admin\AppData\Roaming\Zwpfblvosjv\Phecxlkxbf.exe
    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • \ProgramData\Remcos\rdfghfgjkgoighjc.exe
    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • memory/924-79-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/924-71-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/924-64-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/924-66-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/924-68-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/924-69-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/924-70-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/924-63-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/924-73-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/924-75-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/924-76-0x0000000000432E48-mapping.dmp
  • memory/924-83-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/940-59-0x000000006EC40000-0x000000006F1EB000-memory.dmp
    Filesize

    5.7MB

  • memory/940-57-0x0000000000000000-mapping.dmp
  • memory/940-61-0x000000006EC40000-0x000000006F1EB000-memory.dmp
    Filesize

    5.7MB

  • memory/940-60-0x000000006EC40000-0x000000006F1EB000-memory.dmp
    Filesize

    5.7MB

  • memory/1080-85-0x0000000000BB0000-0x0000000000BB8000-memory.dmp
    Filesize

    32KB

  • memory/1080-81-0x0000000000000000-mapping.dmp
  • memory/1872-108-0x0000000000432E48-mapping.dmp
  • memory/1872-112-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/1872-113-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/1956-87-0x0000000000000000-mapping.dmp
  • memory/1956-90-0x000000006EC20000-0x000000006F1CB000-memory.dmp
    Filesize

    5.7MB

  • memory/1956-91-0x000000006EC20000-0x000000006F1CB000-memory.dmp
    Filesize

    5.7MB

  • memory/1956-92-0x000000006EC20000-0x000000006F1CB000-memory.dmp
    Filesize

    5.7MB

  • memory/2008-62-0x0000000004D60000-0x0000000004DE0000-memory.dmp
    Filesize

    512KB

  • memory/2008-54-0x0000000000D40000-0x0000000000D48000-memory.dmp
    Filesize

    32KB

  • memory/2008-56-0x0000000007330000-0x00000000075CE000-memory.dmp
    Filesize

    2.6MB

  • memory/2008-55-0x0000000074D81000-0x0000000074D83000-memory.dmp
    Filesize

    8KB