Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-08-2024 01:00

General

  • Target

    tmp6yepb2lk.exe

  • Size

    77KB

  • MD5

    850bb666d97b841c0df079f321a440f7

  • SHA1

    3618d43d64d281a2aa2d551abd5bb805e6352a51

  • SHA256

    b30ebf707e45596c98eef8d06bdb344c616a1f8e1722b3c1ec3f8ad7635d91f4

  • SHA512

    7900edec0ccf7e7a4a459f98bb31b07815b2586bc5e461f30474b4aca25b3e40e188ccbd465fed76682111fb6651b5631ddf3e857324f0f1b8d05e37575f8407

  • SSDEEP

    768:mKGhS24vnz5SU2Ip4jBqltCF0AxEjenoB69+FxC:u824vnlSFHBWAxEjc+a

Malware Config

Extracted

Family

remcos

Botnet

59b3ch7k27

C2

91.92.240.98:2404

Attributes
  • audio_folder

    MicRecords

  • 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-N5F1RT

  • 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.

  • Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs
  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Detected Nirsoft tools 5 IoCs

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

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 4 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 7 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
      PID:3520
      • C:\Users\Admin\AppData\Local\Temp\tmp6yepb2lk.exe
        "C:\Users\Admin\AppData\Local\Temp\tmp6yepb2lk.exe"
        2⤵
        • Suspicious use of NtCreateUserProcessOtherParentProcess
        • Adds Run key to start application
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:216
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
        2⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:3468
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
          C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe /stext "C:\Users\Admin\AppData\Local\Temp\hsjnjtkjadakgohwecohtjaocstlf"
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:1784
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
          C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe /stext "C:\Users\Admin\AppData\Local\Temp\kmogjlvdomsojuvannbiwovxlzkugkqc"
          3⤵
          • Accesses Microsoft Outlook accounts
          • System Location Discovery: System Language Discovery
          PID:2280
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
          C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe /stext "C:\Users\Admin\AppData\Local\Temp\uoty"
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1608

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      4KB

      MD5

      15e28d82a9ee8a45c10bcf671fef0362

      SHA1

      2b126b086a1191cb8b4d444e87781358d51af3a4

      SHA256

      012fbb5f15d52a9560cf0e77fd36837ec2c56aff7a989d31c3d40d4f6df6cf9d

      SHA512

      3dd749523858a54e7e5ededba47d54715c9d5663dd0bd609363de7442436d1f0e924c5e4706e3ac413b79ddb6a18c796cc0ad166b4c87a3a7a6b009ba77fee82

    • memory/216-29-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-4-0x0000000074E00000-0x00000000755B0000-memory.dmp

      Filesize

      7.7MB

    • memory/216-27-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-3-0x0000000074E0E000-0x0000000074E0F000-memory.dmp

      Filesize

      4KB

    • memory/216-23-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-5-0x0000000006B30000-0x0000000006C4E000-memory.dmp

      Filesize

      1.1MB

    • memory/216-7-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-6-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-19-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-68-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-69-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-65-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-63-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-61-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-59-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-57-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-55-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-53-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-49-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-47-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-45-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-41-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-39-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-37-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-21-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-33-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-31-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-0-0x0000000074E0E000-0x0000000074E0F000-memory.dmp

      Filesize

      4KB

    • memory/216-2-0x0000000074E00000-0x00000000755B0000-memory.dmp

      Filesize

      7.7MB

    • memory/216-1-0x0000000000F40000-0x0000000000F58000-memory.dmp

      Filesize

      96KB

    • memory/216-35-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-17-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-15-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-13-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-11-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-9-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-52-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-43-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-25-0x0000000006B30000-0x0000000006C47000-memory.dmp

      Filesize

      1.1MB

    • memory/216-1080-0x0000000074E00000-0x00000000755B0000-memory.dmp

      Filesize

      7.7MB

    • memory/216-1081-0x0000000006F00000-0x0000000006F98000-memory.dmp

      Filesize

      608KB

    • memory/216-1082-0x0000000006FA0000-0x0000000006FEC000-memory.dmp

      Filesize

      304KB

    • memory/216-1086-0x0000000074E00000-0x00000000755B0000-memory.dmp

      Filesize

      7.7MB

    • memory/216-1088-0x0000000074E00000-0x00000000755B0000-memory.dmp

      Filesize

      7.7MB

    • memory/216-1087-0x0000000074E00000-0x00000000755B0000-memory.dmp

      Filesize

      7.7MB

    • memory/216-1089-0x0000000074E00000-0x00000000755B0000-memory.dmp

      Filesize

      7.7MB

    • memory/216-1090-0x00000000078F0000-0x0000000007E94000-memory.dmp

      Filesize

      5.6MB

    • memory/216-1092-0x0000000074E00000-0x00000000755B0000-memory.dmp

      Filesize

      7.7MB

    • memory/216-1091-0x0000000006150000-0x00000000061A4000-memory.dmp

      Filesize

      336KB

    • memory/216-1100-0x0000000074E00000-0x00000000755B0000-memory.dmp

      Filesize

      7.7MB

    • memory/1608-1119-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1608-1125-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1784-1118-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/1784-1128-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2280-1120-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2280-1126-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/3468-1097-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3468-1136-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB