Analysis

  • max time kernel
    145s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/01/2024, 02:31

General

  • Target

    790b9e9961e4b8ca5171d422239e0541.exe

  • Size

    1.0MB

  • MD5

    790b9e9961e4b8ca5171d422239e0541

  • SHA1

    28b6a1a0f3d823c2626d35607a58f19520f48df8

  • SHA256

    b1eeeb094d51c8f5f2931b00533cb5a0dfb98cf310ea06580c7967976d215b3b

  • SHA512

    bdb23c43c65dbaad81426ffb00abbe71b4e2e9ca57219f16c83724e490e2abd5c860d78536b68735f882b861f0ee7b7943dacf0308c69a60f90a33cb51809012

  • SSDEEP

    24576:08pod6qMyQ7RLRUlL/HbDL0PoJH4T2fXBxV:flAL/7DQSH4T2/BT

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

194.5.98.28:3040

127.0.0.1:3040

Mutex

eed6a097-a4d3-4ab0-9875-46a22fdaf6ba

Attributes
  • activate_away_mode

    false

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2021-05-18T10:55:38.959783136Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    3040

  • default_group

    AUGUST 08/06/2021

  • 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

    eed6a097-a4d3-4ab0-9875-46a22fdaf6ba

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    194.5.98.28

  • 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.

  • 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
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 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\790b9e9961e4b8ca5171d422239e0541.exe
    "C:\Users\Admin\AppData\Local\Temp\790b9e9961e4b8ca5171d422239e0541.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4288
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\sRwOrsHsaniq" /XML "C:\Users\Admin\AppData\Local\Temp\tmp20A2.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2756
    • C:\Users\Admin\AppData\Local\Temp\790b9e9961e4b8ca5171d422239e0541.exe
      "C:\Users\Admin\AppData\Local\Temp\790b9e9961e4b8ca5171d422239e0541.exe"
      2⤵
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:5088

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\790b9e9961e4b8ca5171d422239e0541.exe.log

    Filesize

    1KB

    MD5

    17573558c4e714f606f997e5157afaac

    SHA1

    13e16e9415ceef429aaf124139671ebeca09ed23

    SHA256

    c18db6aecad2436da4a63ff26af4e3a337cca48f01c21b8db494fe5ccc60e553

    SHA512

    f4edf13f05a0d142e4dd42802098c8c44988ee8869621a62c2b565a77c9a95857f636583ff8d6d9baa366603d98b9bfbf1fc75bc6f9f8f83c80cb1215b2941cc

  • C:\Users\Admin\AppData\Local\Temp\tmp20A2.tmp

    Filesize

    1KB

    MD5

    372fde01a0dc2ff581c862e4070fead0

    SHA1

    d869f5af11f96359c8d93e0f41bd6f042a6ad001

    SHA256

    62ca54a873628404b9d6881c03f43511be57dd814ab7c1140bf405a98438523e

    SHA512

    d5946c4986b12308b4e9e857945ad570bf3d2180dc68886a348d8dbba7c4b0b9886faa6ca6c24023feaefacab1517278f7af15221149375ea76c24927f322b8c

  • memory/4288-12-0x00000000060C0000-0x00000000060FA000-memory.dmp

    Filesize

    232KB

  • memory/4288-2-0x0000000005300000-0x000000000539C000-memory.dmp

    Filesize

    624KB

  • memory/4288-4-0x00000000053A0000-0x0000000005432000-memory.dmp

    Filesize

    584KB

  • memory/4288-5-0x0000000005500000-0x0000000005510000-memory.dmp

    Filesize

    64KB

  • memory/4288-7-0x00000000054A0000-0x00000000054F6000-memory.dmp

    Filesize

    344KB

  • memory/4288-6-0x00000000052B0000-0x00000000052BA000-memory.dmp

    Filesize

    40KB

  • memory/4288-8-0x0000000005450000-0x000000000546E000-memory.dmp

    Filesize

    120KB

  • memory/4288-9-0x0000000074BE0000-0x0000000075390000-memory.dmp

    Filesize

    7.7MB

  • memory/4288-10-0x0000000005500000-0x0000000005510000-memory.dmp

    Filesize

    64KB

  • memory/4288-1-0x0000000074BE0000-0x0000000075390000-memory.dmp

    Filesize

    7.7MB

  • memory/4288-3-0x0000000005950000-0x0000000005EF4000-memory.dmp

    Filesize

    5.6MB

  • memory/4288-0-0x00000000007B0000-0x00000000008BE000-memory.dmp

    Filesize

    1.1MB

  • memory/4288-11-0x00000000062F0000-0x0000000006396000-memory.dmp

    Filesize

    664KB

  • memory/4288-22-0x0000000074BE0000-0x0000000075390000-memory.dmp

    Filesize

    7.7MB

  • memory/5088-21-0x0000000074BE0000-0x0000000075390000-memory.dmp

    Filesize

    7.7MB

  • memory/5088-18-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/5088-23-0x00000000055E0000-0x00000000055F0000-memory.dmp

    Filesize

    64KB

  • memory/5088-27-0x00000000058A0000-0x00000000058AA000-memory.dmp

    Filesize

    40KB

  • memory/5088-26-0x0000000005560000-0x000000000557E000-memory.dmp

    Filesize

    120KB

  • memory/5088-25-0x0000000005510000-0x000000000551A000-memory.dmp

    Filesize

    40KB

  • memory/5088-28-0x0000000074BE0000-0x0000000075390000-memory.dmp

    Filesize

    7.7MB

  • memory/5088-29-0x00000000055E0000-0x00000000055F0000-memory.dmp

    Filesize

    64KB