Overview

overview

10

Static

static

1

chrome.exe

windows7-x64

10

chrome.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    20-02-2023 15:16

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General

  • Target

    chrome.exe

  • Size

    583KB

  • MD5

    42ee1ad3b4600a955888780e8899c1ce

  • SHA1

    4ba8b368c32fa57703613e0c98d90381b872d5ad

  • SHA256

    caf073b1d85bc136488382be2c83c264ac64d2df279752341b1c4601c6201a41

  • SHA512

    42063774445da72a55fd97b8a614275993ac7def057efea876e2bafca5a4560c553a450252157a662364e58734d221632547f1e776d7bd8b600ca4c127c03665

  • SSDEEP

    12288:L5Z+mqofs6TaXML3crUlbIInrHR2Fwn6DijBtpl2i6F+0cfjoop:tUJN9MwrfInrHvnY7ipzoop

Score
10/10
guloadernanocoredownloaderkeyloggerpersistencespywarestealertrojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

212.87.204.153:6100

Mutex

ea7f103c-d9e6-4f82-9646-8d28f9c28502

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    212.87.204.153

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-12-02T00:16:59.005970036Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    6100

  • default_group

    GRACE

  • 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

    ea7f103c-d9e6-4f82-9646-8d28f9c28502

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    212.87.204.153

  • 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

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

    downloaderguloader
  • NanoCore

    NanoCore is a remote access tool (RAT) with a variety of capabilities.

    keyloggertrojanstealerspywarenanocore
  • Checks QEMU agent file 2 TTPs 2 IoCs

    Checks presence of QEMU agent, possibly to detect virtualization.

  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\chrome.exe
    "C:\Users\Admin\AppData\Local\Temp\chrome.exe"
    1⤵
    • Checks QEMU agent file
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:1996
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\caspol.exe
      "C:\Users\Admin\AppData\Local\Temp\chrome.exe"
      2⤵
      • Checks QEMU agent file
      • Adds Run key to start application
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2024

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Local\Temp\nsd2149.tmp\System.dll
    Filesize

    11KB

    MD5

    9625d5b1754bc4ff29281d415d27a0fd

    SHA1

    80e85afc5cccd4c0a3775edbb90595a1a59f5ce0

    SHA256

    c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448

    SHA512

    dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

    Download Submit

  • \Users\Admin\AppData\Local\Temp\nsd2149.tmp\System.dll
    Filesize

    11KB

    MD5

    9625d5b1754bc4ff29281d415d27a0fd

    SHA1

    80e85afc5cccd4c0a3775edbb90595a1a59f5ce0

    SHA256

    c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448

    SHA512

    dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

    Download Submit

  • memory/1996-63-0x0000000076F30000-0x00000000770B0000-memory.dmp

    Filesize

    1.5MB

    Download

  • memory/1996-57-0x0000000003980000-0x000000000900E000-memory.dmp

    Filesize

    86.6MB

    Download

  • memory/1996-58-0x0000000003980000-0x000000000900E000-memory.dmp

    Filesize

    86.6MB

    Download

  • memory/1996-59-0x0000000076D50000-0x0000000076EF9000-memory.dmp

    Filesize

    1.7MB

    Download

  • memory/1996-78-0x0000000076F30000-0x00000000770B0000-memory.dmp

    Filesize

    1.5MB

    Download

  • memory/1996-64-0x0000000076F30000-0x00000000770B0000-memory.dmp

    Filesize

    1.5MB

    Download

  • memory/1996-54-0x0000000074C11000-0x0000000074C13000-memory.dmp

    Filesize

    8KB

    Download

  • memory/2024-71-0x0000000076F30000-0x00000000770B0000-memory.dmp

    Filesize

    1.5MB

    Download

  • memory/2024-66-0x0000000076D50000-0x0000000076EF9000-memory.dmp

    Filesize

    1.7MB

    Download

  • memory/2024-65-0x0000000000620000-0x0000000005CAE000-memory.dmp

    Filesize

    86.6MB

    Download

  • memory/2024-72-0x0000000000620000-0x0000000005CAE000-memory.dmp

    Filesize

    86.6MB

    Download

  • memory/2024-73-0x0000000000400000-0x0000000000615000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/2024-74-0x0000000000401000-0x0000000000615000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/2024-76-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

    Download

  • memory/2024-77-0x0000000072D90000-0x000000007333B000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/2024-62-0x00000000003B8A9E-mapping.dmp

    Download

  • memory/2024-79-0x0000000076F30000-0x00000000770B0000-memory.dmp

    Filesize

    1.5MB

    Download