Overview

overview

10

Static

static

PDF.exe

windows7_x64

10

PDF.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    144s
  • max time network
    182s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    21-05-2022 02:57

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General

  • Target

    PDF.exe

  • Size

    356KB

  • MD5

    a545c585fdb84c6e92484da233292e25

  • SHA1

    b491d5687f2ae3c16ee329b9b7d83255787d5d65

  • SHA256

    b4a60a5fdddebf1351aa77b5ae1b850c8f53312cbe7e3792a0adbd3a458c70ba

  • SHA512

    f9ce5c7b1901fda942843fe72af17885a46cb9acf59783b14d6df5a315dab09db0a50c215f16c627120284398e037549793a5d2a277ac1319965206875f8bb85

Score
10/10
nanocoreevasionkeyloggerspywarestealertrojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

172.111.188.199:8829

Mutex

ce1d7a43-a4b9-4511-9ddf-1134841f2535

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-02-02T10:25:40.952250336Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    8829

  • default_group

    Billi

  • 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

    ce1d7a43-a4b9-4511-9ddf-1134841f2535

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    172.111.188.199

  • 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.

    keyloggertrojanstealerspywarenanocore
  • Looks for VirtualBox Guest Additions in registry 2 TTPs
    evasion
  • Looks for VMWare Tools registry key 2 TTPs
    evasion
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
    evasiontrojan
  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • 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.

    persistence
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PDF.exe
    "C:\Users\Admin\AppData\Local\Temp\PDF.exe"
    1⤵
    • Checks BIOS information in registry
    • Checks computer location settings
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1064
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YuhOvQLEAEK" /XML "C:\Users\Admin\AppData\Local\Temp\tmp78D.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1228
    • C:\Users\Admin\AppData\Local\Temp\PDF.exe
      "{path}"
      2⤵
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:204

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp78D.tmp
    Filesize

    1KB

    MD5

    cdd39ecb6bdc1320a19c73ce73414f00

    SHA1

    611542bcba3f51bfdf981371c673d2cd21f85809

    SHA256

    38ad7e12cbdef2cf9852d64124c80f0fabaa10dd3c8890743737ede4d859942d

    SHA512

    3d5c575007dd83114037d42c5be29053575d98c189d688f9b7a0aca40d445edaa1e0c0f5ab6017d22a398e0546fef0573f7559e61e0a971b04079162a99cd707

    Download Submit

  • memory/204-133-0x0000000000000000-mapping.dmp

    Download

  • memory/204-134-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

    Download

  • memory/204-135-0x0000000074B30000-0x00000000750E1000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/1064-130-0x0000000074B30000-0x00000000750E1000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/1228-131-0x0000000000000000-mapping.dmp

    Download