Analysis

  • max time kernel
    117s
  • max time network
    163s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    28-10-2021 09:18

General

  • Target

    Quotation Specification.pdf.scr

  • Size

    527KB

  • MD5

    cd86e429ead3cceb1f87d7c3c4d868cf

  • SHA1

    d75887eae42e29de244e49183a35ee02229a9898

  • SHA256

    cfa12c6334900de0f6c39f5db7d49ab9b5ac343ac7dc54ae1428e85702157b63

  • SHA512

    edc85311f55e4a4dfdba5ba34d393d42205ea8961491bb313c3d97ace8344c0a844bf880aa37908ee3bd2263c96da8733b10df24a1d9e72118ed9cfe24791b0c

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

harold.accesscam.org:6051

harold.2waky.com:6051

Mutex

ed2d5ce0-ca4d-4264-be01-91a018d59d09

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    harold.2waky.com

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2019-07-13T12:05:45.695760236Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    6051

  • default_group

    INV TO BID

  • 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

    ed2d5ce0-ca4d-4264-be01-91a018d59d09

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    harold.accesscam.org

  • 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 1 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 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Quotation Specification.pdf.scr
    "C:\Users\Admin\AppData\Local\Temp\Quotation Specification.pdf.scr" /S
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:756
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\KrczpYbD" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9566.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:3964
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:4616

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/756-115-0x0000000003190000-0x0000000003191000-memory.dmp
    Filesize

    4KB

  • memory/756-116-0x0000000003191000-0x0000000003192000-memory.dmp
    Filesize

    4KB

  • memory/3964-117-0x0000000000000000-mapping.dmp
  • memory/4616-118-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/4616-119-0x000000000041E792-mapping.dmp
  • memory/4616-120-0x0000000002EF0000-0x0000000002EF1000-memory.dmp
    Filesize

    4KB

  • memory/4616-121-0x0000000002EF1000-0x0000000002EF2000-memory.dmp
    Filesize

    4KB