Analysis

  • max time kernel
    135s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16-09-2024 15:30

General

  • Target

    REVISE_RECBTAAH-PI.exe

  • Size

    676KB

  • MD5

    d0c54245dc16324c9170c419f2500737

  • SHA1

    642c7dd025dc31d39b26af7a7be53ba617e78bd4

  • SHA256

    6c22578a9080fc7f38d949df46f1bb88f386fd17ad76d78cac31e5b7782a2685

  • SHA512

    1e95e9efc025c53192de36154f51198181ec445145fdfe7f3b1afc83956cc49a04cbd9c6d318dde926da27057cf149565f5de5cb4208cfa78e01eef3f1f582e4

  • SSDEEP

    12288:49TK3cUmdavrlTGt5jw0LECUfE1F1Yl7tpkA1A9:0K3cFd6JNbDc13SHkG

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

45.66.231.103:7754

7754.hopto.org:7754

Mutex

cee2b15d-82f8-4d85-8dc9-22fd50400675

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    7754.hopto.org

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2024-06-21T07:47:09.033387236Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    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

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    7754

  • default_group

    7754Nano

  • 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

    cee2b15d-82f8-4d85-8dc9-22fd50400675

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    45.66.231.103

  • primary_dns_server

    8.8.8.8

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    false

  • 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.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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
  • Drops file in Program Files directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 29 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\REVISE_RECBTAAH-PI.exe
    "C:\Users\Admin\AppData\Local\Temp\REVISE_RECBTAAH-PI.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2668
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\REVISE_RECBTAAH-PI.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3304
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\oFNArmC.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4364
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\oFNArmC" /XML "C:\Users\Admin\AppData\Local\Temp\tmpAFD7.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:5072
    • C:\Users\Admin\AppData\Local\Temp\REVISE_RECBTAAH-PI.exe
      "C:\Users\Admin\AppData\Local\Temp\REVISE_RECBTAAH-PI.exe"
      2⤵
        PID:4260
      • C:\Users\Admin\AppData\Local\Temp\REVISE_RECBTAAH-PI.exe
        "C:\Users\Admin\AppData\Local\Temp\REVISE_RECBTAAH-PI.exe"
        2⤵
          PID:3456
        • C:\Users\Admin\AppData\Local\Temp\REVISE_RECBTAAH-PI.exe
          "C:\Users\Admin\AppData\Local\Temp\REVISE_RECBTAAH-PI.exe"
          2⤵
          • Adds Run key to start application
          • Checks whether UAC is enabled
          • Drops file in Program Files directory
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2944
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks.exe" /create /f /tn "DSL Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmpB48B.tmp"
            3⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:5100
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks.exe" /create /f /tn "DSL Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpB5B4.tmp"
            3⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:4716

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

        Filesize

        2KB

        MD5

        3d086a433708053f9bf9523e1d87a4e8

        SHA1

        b3ab5d4f282a4c8fe8c3005b8a557ed5a0e37f28

        SHA256

        6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69

        SHA512

        931ae42b4c68a4507ff2342332b08eb407050d47cf4176137ea022d0f6e513c689e998445a04c6d18d4877391705c586bfce0234632b898d41aaed0957996dfd

      • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

        Filesize

        18KB

        MD5

        ebdf35a8a6a848e80c9957832129d193

        SHA1

        5c5c3b80185bd43b4375d94ebc839d965e67c35e

        SHA256

        b6dcf6a79af1dd6e1e5d418b6b7ef7fb66e2c4e0253bbc9ef2874ad7f665e64e

        SHA512

        1a8e5cd982ec5f857ae5dea45cadb3fdd9296169510911a5bbcc16e4647521a0a4867b694d987e3fd55bb11a50dda77889d57faed8ac4ae6902e15f6ee80c5a3

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_x4k0slgn.2dc.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • C:\Users\Admin\AppData\Local\Temp\tmpAFD7.tmp

        Filesize

        1KB

        MD5

        11c73b55c060aedf98532a1ef4e7e00e

        SHA1

        b925c3b24af4f6d0cafd568f9b000ba1dad7cac8

        SHA256

        b8864999f3c4444c74920ee6b814e2b955033a6b83df5fc8467748c8a8ceb903

        SHA512

        a8411bb22fba08e9405795327204c71879c4b30ab000c10f9fe49d2ada78f17f6b0f813df5fa41c6a30e94072966bf3186e98f441ef2f94e7e5ce2ef418a2b64

      • C:\Users\Admin\AppData\Local\Temp\tmpB48B.tmp

        Filesize

        1KB

        MD5

        6f7560bbdc552da8ecfe72886865afcf

        SHA1

        12a6ca08cd14fabeb51cf51b08f0ef0e0ba79591

        SHA256

        eb97db02099f25f5dd11e261332a13cb1c3ae3d5b9a0568ffbae797d35cc60cb

        SHA512

        04b41d85b00806697f3f8951eb99edfe559baa6bf81f77787b64b4e5cd2b3f5dce2b0120d58fb18dc9ee051486bac706618063781b51095ab7fcb008755ce679

      • C:\Users\Admin\AppData\Local\Temp\tmpB5B4.tmp

        Filesize

        1KB

        MD5

        afb71a33ece3758f782f052bbe5da94f

        SHA1

        e69b9070ff52f81fdf01a40f775d021e4b4e71e4

        SHA256

        abd73bfca8458750ee751d4c6c106d54dcf0969592f476acc64ab0d7f2bb1978

        SHA512

        22c45992ca358ca9d4605ac426b65903b11b27db1b9c608739245dc412aa256d0908566626b3cfdafb32fca0809bf46c8824ab98cea7b7662216c915e6ef013f

      • memory/2668-10-0x000000000B030000-0x000000000B0CC000-memory.dmp

        Filesize

        624KB

      • memory/2668-4-0x0000000074E00000-0x00000000755B0000-memory.dmp

        Filesize

        7.7MB

      • memory/2668-8-0x0000000074E00000-0x00000000755B0000-memory.dmp

        Filesize

        7.7MB

      • memory/2668-9-0x0000000008820000-0x000000000889A000-memory.dmp

        Filesize

        488KB

      • memory/2668-47-0x0000000074E00000-0x00000000755B0000-memory.dmp

        Filesize

        7.7MB

      • memory/2668-6-0x0000000008530000-0x0000000008540000-memory.dmp

        Filesize

        64KB

      • memory/2668-5-0x0000000005930000-0x000000000593A000-memory.dmp

        Filesize

        40KB

      • memory/2668-0-0x0000000074E0E000-0x0000000074E0F000-memory.dmp

        Filesize

        4KB

      • memory/2668-1-0x0000000000E30000-0x0000000000EE0000-memory.dmp

        Filesize

        704KB

      • memory/2668-2-0x0000000005E30000-0x00000000063D4000-memory.dmp

        Filesize

        5.6MB

      • memory/2668-7-0x0000000074E0E000-0x0000000074E0F000-memory.dmp

        Filesize

        4KB

      • memory/2668-3-0x0000000005880000-0x0000000005912000-memory.dmp

        Filesize

        584KB

      • memory/2944-58-0x0000000004CE0000-0x0000000004CEA000-memory.dmp

        Filesize

        40KB

      • memory/2944-59-0x0000000005E20000-0x0000000005E3E000-memory.dmp

        Filesize

        120KB

      • memory/2944-60-0x00000000051B0000-0x00000000051BA000-memory.dmp

        Filesize

        40KB

      • memory/2944-33-0x0000000000400000-0x0000000000438000-memory.dmp

        Filesize

        224KB

      • memory/3304-45-0x0000000006190000-0x00000000061F6000-memory.dmp

        Filesize

        408KB

      • memory/3304-16-0x0000000074E00000-0x00000000755B0000-memory.dmp

        Filesize

        7.7MB

      • memory/3304-99-0x0000000074E00000-0x00000000755B0000-memory.dmp

        Filesize

        7.7MB

      • memory/3304-15-0x0000000002D10000-0x0000000002D46000-memory.dmp

        Filesize

        216KB

      • memory/3304-27-0x00000000058A0000-0x00000000058C2000-memory.dmp

        Filesize

        136KB

      • memory/3304-49-0x0000000006650000-0x000000000666E000-memory.dmp

        Filesize

        120KB

      • memory/3304-50-0x0000000006BE0000-0x0000000006C2C000-memory.dmp

        Filesize

        304KB

      • memory/3304-28-0x0000000074E00000-0x00000000755B0000-memory.dmp

        Filesize

        7.7MB

      • memory/3304-46-0x0000000006200000-0x0000000006266000-memory.dmp

        Filesize

        408KB

      • memory/3304-17-0x0000000005B10000-0x0000000006138000-memory.dmp

        Filesize

        6.2MB

      • memory/3304-18-0x0000000074E00000-0x00000000755B0000-memory.dmp

        Filesize

        7.7MB

      • memory/3304-89-0x0000000007BB0000-0x0000000007BBE000-memory.dmp

        Filesize

        56KB

      • memory/3304-61-0x0000000006C70000-0x0000000006CA2000-memory.dmp

        Filesize

        200KB

      • memory/3304-62-0x0000000075690000-0x00000000756DC000-memory.dmp

        Filesize

        304KB

      • memory/3304-72-0x0000000006BB0000-0x0000000006BCE000-memory.dmp

        Filesize

        120KB

      • memory/3304-91-0x0000000007CC0000-0x0000000007CDA000-memory.dmp

        Filesize

        104KB

      • memory/3304-73-0x0000000007870000-0x0000000007913000-memory.dmp

        Filesize

        652KB

      • memory/3304-84-0x0000000007FC0000-0x000000000863A000-memory.dmp

        Filesize

        6.5MB

      • memory/3304-85-0x0000000007980000-0x000000000799A000-memory.dmp

        Filesize

        104KB

      • memory/3304-86-0x00000000079F0000-0x00000000079FA000-memory.dmp

        Filesize

        40KB

      • memory/3304-87-0x0000000007C00000-0x0000000007C96000-memory.dmp

        Filesize

        600KB

      • memory/3304-90-0x0000000007BC0000-0x0000000007BD4000-memory.dmp

        Filesize

        80KB

      • memory/4364-21-0x0000000074E00000-0x00000000755B0000-memory.dmp

        Filesize

        7.7MB

      • memory/4364-88-0x0000000007DF0000-0x0000000007E01000-memory.dmp

        Filesize

        68KB

      • memory/4364-74-0x0000000075690000-0x00000000756DC000-memory.dmp

        Filesize

        304KB

      • memory/4364-92-0x0000000007F10000-0x0000000007F18000-memory.dmp

        Filesize

        32KB

      • memory/4364-19-0x0000000074E00000-0x00000000755B0000-memory.dmp

        Filesize

        7.7MB

      • memory/4364-43-0x0000000074E00000-0x00000000755B0000-memory.dmp

        Filesize

        7.7MB

      • memory/4364-48-0x00000000064A0000-0x00000000067F4000-memory.dmp

        Filesize

        3.3MB

      • memory/4364-98-0x0000000074E00000-0x00000000755B0000-memory.dmp

        Filesize

        7.7MB