Analysis

  • max time kernel
    147s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-04-2024 15:44

General

  • Target

    011c9344620bfd478f5d5cd2e086906f_JaffaCakes118.exe

  • Size

    542KB

  • MD5

    011c9344620bfd478f5d5cd2e086906f

  • SHA1

    0cf2f268bb8bee1dc3bc7abc740856401a2dbb11

  • SHA256

    e4e8614432443bd5bb00a2b4ec2bb75c000ecbc5e953ed48b3b591b49a927f95

  • SHA512

    056669240c96d3f8d0b8f31c7c16b7ab9b104a7b87639da8af9c7ac45c3a47f7d403f2afdba259f8d50b31cd526d660ca446a8e82c1b9a1adc8bcf5f64157314

  • SSDEEP

    12288:2MT4CbWhzzCGI2iWdYT/IUppED7zaR6I9+c/73KPo1CSj0w:244pHbsWdiI46D7C6IhDlLj

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

95.141.43.197:1990

127.0.0.1:1990

Mutex

657717bf-3186-46ac-b768-4ebefec20c1b

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2018-08-17T11:41:28.894134736Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    1990

  • default_group

    NOVEMBER 5

  • enable_debug_mode

    true

  • gc_threshold

    1.048576e+07

  • keep_alive_timeout

    30000

  • keyboard_logging

    false

  • lan_timeout

    2500

  • max_packet_size

    1.048576e+07

  • mutex

    657717bf-3186-46ac-b768-4ebefec20c1b

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    95.141.43.197

  • primary_dns_server

    8.8.8.8

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    true

  • set_critical_process

    true

  • timeout_interval

    5000

  • use_custom_dns_server

    false

  • version

    1.2.2.0

  • wan_timeout

    8000

Signatures

  • NanoCore

    NanoCore is a remote access tool (RAT) with a variety of capabilities.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\011c9344620bfd478f5d5cd2e086906f_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\011c9344620bfd478f5d5cd2e086906f_JaffaCakes118.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1624
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c copy "C:\Users\Admin\AppData\Local\Temp\011c9344620bfd478f5d5cd2e086906f_JaffaCakes118.exe" "C:\Users\Admin\AppData\Local\SystemObi.exe"
      2⤵
        PID:2260
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c, "C:\Users\Admin\AppData\Local\SystemObi.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3768
        • C:\Users\Admin\AppData\Local\SystemObi.exe
          "C:\Users\Admin\AppData\Local\SystemObi.exe"
          3⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1204
          • C:\Users\Admin\AppData\Local\SystemObi.exe
            "C:\Users\Admin\AppData\Local\SystemObi.exe"
            4⤵
            • Executes dropped EXE
            • Checks whether UAC is enabled
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of AdjustPrivilegeToken
            PID:4688

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\SystemObi.exe

      Filesize

      542KB

      MD5

      011c9344620bfd478f5d5cd2e086906f

      SHA1

      0cf2f268bb8bee1dc3bc7abc740856401a2dbb11

      SHA256

      e4e8614432443bd5bb00a2b4ec2bb75c000ecbc5e953ed48b3b591b49a927f95

      SHA512

      056669240c96d3f8d0b8f31c7c16b7ab9b104a7b87639da8af9c7ac45c3a47f7d403f2afdba259f8d50b31cd526d660ca446a8e82c1b9a1adc8bcf5f64157314

    • memory/1204-23-0x00000000745F0000-0x0000000074DA0000-memory.dmp

      Filesize

      7.7MB

    • memory/1204-19-0x0000000005260000-0x0000000005270000-memory.dmp

      Filesize

      64KB

    • memory/1204-18-0x00000000745F0000-0x0000000074DA0000-memory.dmp

      Filesize

      7.7MB

    • memory/1204-17-0x0000000008AA0000-0x0000000008B3C000-memory.dmp

      Filesize

      624KB

    • memory/1204-16-0x0000000005260000-0x0000000005270000-memory.dmp

      Filesize

      64KB

    • memory/1204-15-0x00000000745F0000-0x0000000074DA0000-memory.dmp

      Filesize

      7.7MB

    • memory/1624-5-0x00000000059C0000-0x00000000059DE000-memory.dmp

      Filesize

      120KB

    • memory/1624-11-0x00000000745F0000-0x0000000074DA0000-memory.dmp

      Filesize

      7.7MB

    • memory/1624-7-0x0000000005C90000-0x0000000005C9A000-memory.dmp

      Filesize

      40KB

    • memory/1624-6-0x0000000005A30000-0x0000000005A40000-memory.dmp

      Filesize

      64KB

    • memory/1624-0-0x00000000745F0000-0x0000000074DA0000-memory.dmp

      Filesize

      7.7MB

    • memory/1624-4-0x0000000005940000-0x00000000059BE000-memory.dmp

      Filesize

      504KB

    • memory/1624-3-0x00000000057A0000-0x0000000005832000-memory.dmp

      Filesize

      584KB

    • memory/1624-2-0x0000000005D50000-0x00000000062F4000-memory.dmp

      Filesize

      5.6MB

    • memory/1624-1-0x0000000000D20000-0x0000000000DB2000-memory.dmp

      Filesize

      584KB

    • memory/4688-20-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/4688-25-0x0000000006090000-0x000000000609A000-memory.dmp

      Filesize

      40KB

    • memory/4688-26-0x0000000006120000-0x000000000613E000-memory.dmp

      Filesize

      120KB

    • memory/4688-27-0x0000000006260000-0x000000000626A000-memory.dmp

      Filesize

      40KB