Analysis

  • max time kernel
    144s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    15/11/2022, 11:37

General

  • Target

    REVISED PO -TSTC22-1011_Pdf.exe

  • Size

    800KB

  • MD5

    bd101f1d805750bd4b9fdeeb546efcc0

  • SHA1

    fa881fdee6fbff34055e00737a3766fcd1493a1b

  • SHA256

    e23943f7a0d3e8bfcb2ea6debdd990281fd94e32629db00f12b8208b668bed52

  • SHA512

    cdf9db01870ead7062166a7b2075620d4aa747b0716078498e917bbb48f6729a32902f49a9d1071d67520752e7e9bffe2d2a7effa304a9acbcea5fa841e40362

  • SSDEEP

    12288:SKfxkcehk1CEunCU8gJwWcGfqefprSBDgM/A:NLV1CEuCURT/mDW

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

henzy.ddns.net:2828

Mutex

88894717-40ab-4845-8948-707139163d90

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-05-20T06:47:18.240303436Z

  • 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

    2828

  • default_group

    User22

  • 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

    88894717-40ab-4845-8948-707139163d90

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    henzy.ddns.net

  • 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.

  • 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). Likely ransomware behaviour.

  • Creates scheduled task(s) 1 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\REVISED PO -TSTC22-1011_Pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\REVISED PO -TSTC22-1011_Pdf.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2012
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\uuPTAGHRzGi.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:520
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uuPTAGHRzGi" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA600.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1904
    • C:\Users\Admin\AppData\Local\Temp\REVISED PO -TSTC22-1011_Pdf.exe
      "C:\Users\Admin\AppData\Local\Temp\REVISED PO -TSTC22-1011_Pdf.exe"
      2⤵
      • 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
      • Suspicious use of WriteProcessMemory
      PID:564
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "ISS Manager" /xml "C:\Users\Admin\AppData\Local\Temp\tmpAAB2.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:1484
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "ISS Manager Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpAB4F.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:1020

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmpA600.tmp

          Filesize

          1KB

          MD5

          3b39ef848eaf4ea5a27da018bd2de1ed

          SHA1

          ffb5be4dd0076143b79f27f95e0feb02d5bdbb8b

          SHA256

          95dedca679f3ef361e3a9b06932734302597b7061aa4dbd7a2d5f7da35f16f4a

          SHA512

          be028b1140906e98fdaf08e9a7516d20166c55639e18984906e9f83dd91ba1033a027babbf0275a16f31bda8fe62d9b22e33b0a0cb094180086080016ec30fb1

        • C:\Users\Admin\AppData\Local\Temp\tmpAAB2.tmp

          Filesize

          1KB

          MD5

          009102eae052bce5463af965c53565c9

          SHA1

          f6291373c2ebf187e3724dc7d4f9c7baf57173bb

          SHA256

          db50cd26a722c0e7c0bf9810f8a24fb79db2c28dee5e5473b32cdafb4c440421

          SHA512

          6103132503be7601ee96a1f75a83923c436881983d2f451cab298a3376f88b5614e5567c088364c5c50ad03f79d121e174b86c285b2a846d73bf2bd39399a2cd

        • C:\Users\Admin\AppData\Local\Temp\tmpAB4F.tmp

          Filesize

          1KB

          MD5

          ea7095fa975a5ac043c9de2899ce61d0

          SHA1

          ba4e21d0728fb1b4b87006c2e8ceb6109c9046a3

          SHA256

          5a1ba7b1b91e0bb7aedcfa82dc687972abb31f72ae1613ac586938ef0843f30f

          SHA512

          b52c8f1b58f263a3d1ad1ef9939167853a5f55033d9ad8976130174c7118407711a0703266c7d2d542bc2ca8119f875e35cc791b9dd70ef83b5310ac1e7cd1cb

        • memory/520-84-0x000000006E1E0000-0x000000006E78B000-memory.dmp

          Filesize

          5.7MB

        • memory/564-68-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/564-83-0x0000000000490000-0x000000000049A000-memory.dmp

          Filesize

          40KB

        • memory/564-82-0x0000000000470000-0x000000000048E000-memory.dmp

          Filesize

          120KB

        • memory/564-64-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/564-65-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/564-67-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/564-81-0x0000000000460000-0x000000000046A000-memory.dmp

          Filesize

          40KB

        • memory/564-70-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/564-75-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/564-73-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/2012-57-0x0000000000330000-0x000000000033C000-memory.dmp

          Filesize

          48KB

        • memory/2012-56-0x0000000000310000-0x0000000000328000-memory.dmp

          Filesize

          96KB

        • memory/2012-54-0x0000000000120000-0x00000000001EE000-memory.dmp

          Filesize

          824KB

        • memory/2012-63-0x0000000005000000-0x000000000503A000-memory.dmp

          Filesize

          232KB

        • memory/2012-58-0x0000000004F90000-0x0000000005004000-memory.dmp

          Filesize

          464KB

        • memory/2012-55-0x00000000767D1000-0x00000000767D3000-memory.dmp

          Filesize

          8KB