Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-09-2022 06:12

General

  • Target

    d68c1898ceffa72ba1ac579c83cc494c.exe

  • Size

    180KB

  • MD5

    d68c1898ceffa72ba1ac579c83cc494c

  • SHA1

    0cbea644e19ae6d3b934a648b5bd1a9558c64e96

  • SHA256

    3d9862ee74e3315354f5423cb0617d65b1a6793821377f3380e6f4a5962598dc

  • SHA512

    35b09232dd1abb7d23910e64d09e6bebd43bc2469c6e4d44a2a4ed8fd88051ec0d08206a8fce25f1efb5aa85cefb9a8d87ddf9adb026029894c5481a19bb1b43

  • SSDEEP

    1536:0GBVDgKMoum8X/ScqsClbZ5hapDbEJ0XIPnG+aaMrIl0PegZoZZZZZZZZZZZZZgJ:0muRjClb81C5adRQQelxyAx9fCTt

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

95.70.139.81:54984

Mutex

2afd92d3-82ee-48f4-9de3-98029fbb1ca4

Attributes
  • activate_away_mode

    false

  • backup_connection_host

    95.70.139.81

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-07-01T08:20:47.457547136Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    false

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    54984

  • default_group

    Default

  • 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

    2afd92d3-82ee-48f4-9de3-98029fbb1ca4

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    95.70.139.81

  • primary_dns_server

    8.8.8.8

  • request_elevation

    false

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    false

  • set_critical_process

    false

  • 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.

  • Downloads MZ/PE file
  • 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 2 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d68c1898ceffa72ba1ac579c83cc494c.exe
    "C:\Users\Admin\AppData\Local\Temp\d68c1898ceffa72ba1ac579c83cc494c.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1976
    • C:\Users\Admin\AppData\Local\Temp\d68c1898ceffa72ba1ac579c83cc494c.exe
      "C:\Users\Admin\AppData\Local\Temp\d68c1898ceffa72ba1ac579c83cc494c.exe"
      2⤵
        PID:5004
      • C:\Users\Admin\AppData\Local\Temp\IAppIdAuthority.exe
        C:\Users\Admin\AppData\Local\Temp\IAppIdAuthority.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1348
        • C:\Users\Admin\AppData\Local\Temp\IAppIdAuthority.exe
          "C:\Users\Admin\AppData\Local\Temp\IAppIdAuthority.exe"
          3⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Checks whether UAC is enabled
          • Drops file in Program Files directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          PID:3900

    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:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\d68c1898ceffa72ba1ac579c83cc494c.exe.log
      Filesize

      410B

      MD5

      51b5bb76cd86bea0070ea505175e7a55

      SHA1

      bf367dd1367188563d01ab7452a384d40c3f8c8c

      SHA256

      c9cfa1c48e1d7c1426404c747d82a3ff22c7d2d659e2a0ac96f2d1a60e85a39a

      SHA512

      3b19aed680aaed4b6449e15f33510ef0e840feb2810d41d57e27d058cd176cecac6783f7a2c52459a88ba1ec0037dbb3b052071d3114f0988ce11ed0a9c432f0

    • C:\Users\Admin\AppData\Local\Temp\IAppIdAuthority.exe
      Filesize

      486KB

      MD5

      9c44d904890df75e5f1b7c3c3ba0b7db

      SHA1

      2aea8311e7e1178396d5308d3853b6dc0334f849

      SHA256

      e7763c3bb26ac869ce31f856dbd583c7b64979afcadbbcff4618c7d42c1feb6d

      SHA512

      bcf9af878879865941d85934df601fb00afc59d8bf2191b609c8d11ccf2205d100aea80c74118783e3e5f19b893a9c3dd2aff4db2792c3205645662661f69788

    • C:\Users\Admin\AppData\Local\Temp\IAppIdAuthority.exe
      Filesize

      486KB

      MD5

      9c44d904890df75e5f1b7c3c3ba0b7db

      SHA1

      2aea8311e7e1178396d5308d3853b6dc0334f849

      SHA256

      e7763c3bb26ac869ce31f856dbd583c7b64979afcadbbcff4618c7d42c1feb6d

      SHA512

      bcf9af878879865941d85934df601fb00afc59d8bf2191b609c8d11ccf2205d100aea80c74118783e3e5f19b893a9c3dd2aff4db2792c3205645662661f69788

    • C:\Users\Admin\AppData\Local\Temp\IAppIdAuthority.exe
      Filesize

      486KB

      MD5

      9c44d904890df75e5f1b7c3c3ba0b7db

      SHA1

      2aea8311e7e1178396d5308d3853b6dc0334f849

      SHA256

      e7763c3bb26ac869ce31f856dbd583c7b64979afcadbbcff4618c7d42c1feb6d

      SHA512

      bcf9af878879865941d85934df601fb00afc59d8bf2191b609c8d11ccf2205d100aea80c74118783e3e5f19b893a9c3dd2aff4db2792c3205645662661f69788

    • memory/1348-140-0x0000000000000000-mapping.dmp
    • memory/1348-143-0x00000000008F0000-0x0000000000970000-memory.dmp
      Filesize

      512KB

    • memory/1976-139-0x0000000006040000-0x000000000604A000-memory.dmp
      Filesize

      40KB

    • memory/1976-132-0x0000000000C40000-0x0000000000C74000-memory.dmp
      Filesize

      208KB

    • memory/1976-133-0x00000000055E0000-0x000000000567C000-memory.dmp
      Filesize

      624KB

    • memory/3900-144-0x0000000000000000-mapping.dmp
    • memory/3900-145-0x0000000000400000-0x0000000000438000-memory.dmp
      Filesize

      224KB

    • memory/5004-138-0x0000000004B60000-0x0000000004BF2000-memory.dmp
      Filesize

      584KB

    • memory/5004-137-0x0000000005070000-0x0000000005614000-memory.dmp
      Filesize

      5.6MB

    • memory/5004-136-0x00000000003A0000-0x00000000003A8000-memory.dmp
      Filesize

      32KB

    • memory/5004-134-0x0000000000000000-mapping.dmp