Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    20-05-2022 23:03

General

  • Target

    862020,pdf.exe

  • Size

    666KB

  • MD5

    c8b0e1ef53206e9a1f8845d379ae6d34

  • SHA1

    127047c52e010a9d5dae43bc2530d43b6db579ce

  • SHA256

    3cb221973d52d12fc900f37496a9c5f77b30da63886a0f7d54111982c00e872b

  • SHA512

    11b72d575390150f0b5200d27cee00787c63102703e2d56b05bcccc398d5ea828c0e0480dae4fc9d9a8f3af802e81e99c28b269e445cc2c3a78b3c2e67a943bc

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

billionaire.ddns.net:3734

Mutex

24d8b675-ce49-4a1b-a4a3-dc5d84e97d70

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-03-25T16:42:00.435974836Z

  • 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

    3734

  • default_group

    Billion

  • 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

    24d8b675-ce49-4a1b-a4a3-dc5d84e97d70

  • mutex_timeout

    5000

  • prevent_system_sleep

    true

  • primary_connection_host

    billionaire.ddns.net

  • 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.

  • Suspicious use of SetThreadContext 1 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 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\862020,pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\862020,pdf.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:892
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\lCwqeTSzvEZ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB368.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1976
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2024
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "DSL Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmpB730.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:1376

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpB368.tmp

    Filesize

    1KB

    MD5

    0c79805fc21b383a69b12abbc1672d0b

    SHA1

    c9b95ad39c9fd214da25d15079115baddb6ad50f

    SHA256

    9ae5476bea5c78979ce1e7cb1e4cb2576fabf3c3f76b355e710925a4d1c25780

    SHA512

    ad8bfa4fceb342a0ae07e0b564f95686411d532c2ccd123cda5b31b09fd804cc2b2586007fe4d92a0c711ce4bdc57c4334edad2016627c446c240dd4e65c0350

  • C:\Users\Admin\AppData\Local\Temp\tmpB730.tmp

    Filesize

    1KB

    MD5

    3e2b26ed8b75ae83a269595180e84ef6

    SHA1

    d30a0335fcce406bca8ba5764288235e6192f608

    SHA256

    108be30aeb8eb31c185a39a6726f26dacbc4e4124951c61a29ade4b7038c71ea

    SHA512

    b6981c68fcb886cc8379a068b96931b9d4f5cc5aa9bdc467e36c4168fe6c5273a2a84d8850b12c11703ec03ac6b1f1950d1e669efcb59fc2402ce4bba9dc03d3

  • memory/892-55-0x00000000763B1000-0x00000000763B3000-memory.dmp

    Filesize

    8KB

  • memory/892-56-0x0000000000360000-0x000000000036A000-memory.dmp

    Filesize

    40KB

  • memory/892-57-0x0000000004580000-0x00000000045D4000-memory.dmp

    Filesize

    336KB

  • memory/892-58-0x0000000004370000-0x00000000043AA000-memory.dmp

    Filesize

    232KB

  • memory/892-54-0x0000000000E10000-0x0000000000EBC000-memory.dmp

    Filesize

    688KB

  • memory/1376-74-0x0000000000000000-mapping.dmp

  • memory/1976-59-0x0000000000000000-mapping.dmp

  • memory/2024-64-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2024-65-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2024-67-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2024-68-0x000000000041E792-mapping.dmp

  • memory/2024-70-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2024-72-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2024-62-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2024-61-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2024-76-0x0000000000440000-0x000000000044A000-memory.dmp

    Filesize

    40KB

  • memory/2024-77-0x0000000000720000-0x000000000073E000-memory.dmp

    Filesize

    120KB

  • memory/2024-78-0x00000000008E0000-0x00000000008EA000-memory.dmp

    Filesize

    40KB

  • memory/2024-79-0x0000000004BA5000-0x0000000004BB6000-memory.dmp

    Filesize

    68KB