Analysis

  • max time kernel
    146s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    27/01/2024, 12:27

General

  • Target

    7a40d67c8a78ef63bda595ab16f5ac0f.exe

  • Size

    1.5MB

  • MD5

    7a40d67c8a78ef63bda595ab16f5ac0f

  • SHA1

    3a4636fdee0797e1dfa0c5075cb0466c9ea00f84

  • SHA256

    e2baf0f5b01a92323fa0f46207e5b9ae09ec8945ef722b912d3559d43c6e907c

  • SHA512

    c448e227eb2244a62e7457823ad471da15a42ceb49e47f9cf148dceaafea95f7d2edca544dc900c4bf53411c94e4a59d393e861767a2fe569a04de707c2fe6bb

  • SSDEEP

    12288:KsJG6kBgpx60IbcNk+uVD7TgUdnfQu5X7Q6H+Uy1Susr8MmH3j2:M6k2n64EPVY1ZZS5R0

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

fablousy.kozow.com:4050

127.0.0.1:4050

Mutex

58d1d627-4bc2-40ea-9ed5-7063fbcc1866

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2021-05-17T05:23:14.334950536Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    4050

  • default_group

    ike

  • 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

    58d1d627-4bc2-40ea-9ed5-7063fbcc1866

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    fablousy.kozow.com

  • 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 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 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7a40d67c8a78ef63bda595ab16f5ac0f.exe
    "C:\Users\Admin\AppData\Local\Temp\7a40d67c8a78ef63bda595ab16f5ac0f.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2336
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uTptUfOsJI" /XML "C:\Users\Admin\AppData\Local\Temp\tmp5206.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:524
    • C:\Users\Admin\AppData\Local\Temp\7a40d67c8a78ef63bda595ab16f5ac0f.exe
      "C:\Users\Admin\AppData\Local\Temp\7a40d67c8a78ef63bda595ab16f5ac0f.exe"
      2⤵
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:596

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp5206.tmp

    Filesize

    1KB

    MD5

    6bd631165363f9d2a16b51b4a04e8da7

    SHA1

    3f7e3f7850f18cdb9ea4f269421a21957c0640ae

    SHA256

    126119e16b352ec912c0dd2ed4a7dd573fb61be98afa4e020de08376eec287b0

    SHA512

    bffea97ac73a0074caa6f549525a21c4679dd9a6275dbfd3f39feac2583acc3b024ee2cfb782440e31f0664ea9d2ecef98f58a0f5853fc4088547002ceac189f

  • memory/596-25-0x0000000073E60000-0x000000007454E000-memory.dmp

    Filesize

    6.9MB

  • memory/596-17-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/596-32-0x0000000000F80000-0x0000000000FC0000-memory.dmp

    Filesize

    256KB

  • memory/596-31-0x0000000073E60000-0x000000007454E000-memory.dmp

    Filesize

    6.9MB

  • memory/596-30-0x0000000000680000-0x000000000068A000-memory.dmp

    Filesize

    40KB

  • memory/596-29-0x00000000005D0000-0x00000000005EE000-memory.dmp

    Filesize

    120KB

  • memory/596-16-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/596-28-0x00000000004C0000-0x00000000004CA000-memory.dmp

    Filesize

    40KB

  • memory/596-13-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/596-14-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/596-26-0x0000000000F80000-0x0000000000FC0000-memory.dmp

    Filesize

    256KB

  • memory/596-15-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/596-23-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/596-19-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/596-21-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2336-24-0x0000000074550000-0x0000000074C3E000-memory.dmp

    Filesize

    6.9MB

  • memory/2336-7-0x0000000000AB0000-0x0000000000AEA000-memory.dmp

    Filesize

    232KB

  • memory/2336-0-0x0000000001260000-0x00000000013F0000-memory.dmp

    Filesize

    1.6MB

  • memory/2336-2-0x0000000001090000-0x00000000010D0000-memory.dmp

    Filesize

    256KB

  • memory/2336-1-0x0000000074550000-0x0000000074C3E000-memory.dmp

    Filesize

    6.9MB

  • memory/2336-6-0x0000000005840000-0x00000000058EA000-memory.dmp

    Filesize

    680KB

  • memory/2336-5-0x0000000001090000-0x00000000010D0000-memory.dmp

    Filesize

    256KB

  • memory/2336-4-0x0000000074550000-0x0000000074C3E000-memory.dmp

    Filesize

    6.9MB

  • memory/2336-3-0x00000000001C0000-0x00000000001DE000-memory.dmp

    Filesize

    120KB