Analysis

  • max time kernel
    114s
  • max time network
    150s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    23-02-2021 12:53

General

  • Target

    uqoYt8EFEWQXAne.exe

  • Size

    515KB

  • MD5

    c415765ef678428f502b101039b7d495

  • SHA1

    e5458ff58b98401d715a68a67afabdefaaf2edc3

  • SHA256

    c024e649afaafd4d1a1ebc2c5a2c457eecd2b5994c2b78e32312eb5289b5c093

  • SHA512

    859deb240d2e8ee1b5cc057aa63b0f8d49fec83619b4c346821b09efa5b9fca01fb85396045658860468107f9a19a8710db85c2c7b299351f6225c64034f2d8c

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

185.239.242.243:2010

127.0.0.1:2010

Mutex

9e8dc517-1111-49c1-9ace-3da1a887c465

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-12-04T23:48:40.197283836Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    2010

  • default_group

    ozil pc

  • 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

    9e8dc517-1111-49c1-9ace-3da1a887c465

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    185.239.242.243

  • 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.

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

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

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • 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.

  • Suspicious behavior: EnumeratesProcesses 7 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\uqoYt8EFEWQXAne.exe
    "C:\Users\Admin\AppData\Local\Temp\uqoYt8EFEWQXAne.exe"
    1⤵
    • Checks BIOS information in registry
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4640
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\krPtdhRIieabB" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF260.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:3304
    • C:\Users\Admin\AppData\Local\Temp\uqoYt8EFEWQXAne.exe
      "C:\Users\Admin\AppData\Local\Temp\uqoYt8EFEWQXAne.exe"
      2⤵
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:516

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

4
T1082

Peripheral Device Discovery

1
T1120

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpF260.tmp
    MD5

    342825acc51ed06f8ddbe20d10766d55

    SHA1

    f07d0923c09f7cc92ad09277892ac70614a06118

    SHA256

    646d5fae2bb90634fe1c22d0fb7d5f96ca96a11c261f0441ba6d91c3abe301ea

    SHA512

    1b2e3686af4c6391bcccbf7c79ac678953b7a034a9824ffbacfb6880bf5d8ea89d6062f39a2ac5ae37a36eceacc1542f5c59f559ef4736b4355a244a6cab24d9

  • memory/516-33-0x0000000006870000-0x0000000006877000-memory.dmp
    Filesize

    28KB

  • memory/516-32-0x0000000006860000-0x000000000686C000-memory.dmp
    Filesize

    48KB

  • memory/516-18-0x0000000073D60000-0x000000007444E000-memory.dmp
    Filesize

    6.9MB

  • memory/516-25-0x0000000005570000-0x0000000005575000-memory.dmp
    Filesize

    20KB

  • memory/516-39-0x00000000068E0000-0x0000000006909000-memory.dmp
    Filesize

    164KB

  • memory/516-38-0x00000000068D0000-0x00000000068DA000-memory.dmp
    Filesize

    40KB

  • memory/516-37-0x00000000068B0000-0x00000000068BF000-memory.dmp
    Filesize

    60KB

  • memory/516-36-0x00000000068A0000-0x00000000068A9000-memory.dmp
    Filesize

    36KB

  • memory/516-35-0x0000000006890000-0x000000000689D000-memory.dmp
    Filesize

    52KB

  • memory/516-34-0x0000000006880000-0x0000000006886000-memory.dmp
    Filesize

    24KB

  • memory/516-26-0x00000000059E0000-0x00000000059F9000-memory.dmp
    Filesize

    100KB

  • memory/516-31-0x0000000006840000-0x0000000006846000-memory.dmp
    Filesize

    24KB

  • memory/516-16-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/516-17-0x000000000041E792-mapping.dmp
  • memory/516-30-0x0000000006810000-0x0000000006825000-memory.dmp
    Filesize

    84KB

  • memory/516-40-0x0000000006920000-0x000000000692F000-memory.dmp
    Filesize

    60KB

  • memory/516-29-0x0000000006800000-0x000000000680D000-memory.dmp
    Filesize

    52KB

  • memory/516-27-0x0000000005590000-0x0000000005593000-memory.dmp
    Filesize

    12KB

  • memory/516-28-0x0000000005750000-0x0000000005751000-memory.dmp
    Filesize

    4KB

  • memory/3304-14-0x0000000000000000-mapping.dmp
  • memory/4640-5-0x0000000004970000-0x0000000004971000-memory.dmp
    Filesize

    4KB

  • memory/4640-6-0x0000000004F80000-0x0000000004F81000-memory.dmp
    Filesize

    4KB

  • memory/4640-3-0x0000000000100000-0x0000000000101000-memory.dmp
    Filesize

    4KB

  • memory/4640-2-0x0000000073D60000-0x000000007444E000-memory.dmp
    Filesize

    6.9MB

  • memory/4640-13-0x0000000008020000-0x0000000008021000-memory.dmp
    Filesize

    4KB

  • memory/4640-12-0x00000000067E0000-0x000000000683B000-memory.dmp
    Filesize

    364KB

  • memory/4640-11-0x0000000004D80000-0x0000000004D83000-memory.dmp
    Filesize

    12KB

  • memory/4640-8-0x0000000004A30000-0x0000000004A31000-memory.dmp
    Filesize

    4KB

  • memory/4640-10-0x0000000004C80000-0x0000000004C81000-memory.dmp
    Filesize

    4KB

  • memory/4640-9-0x0000000004A60000-0x0000000004A61000-memory.dmp
    Filesize

    4KB

  • memory/4640-7-0x0000000004B20000-0x0000000004B21000-memory.dmp
    Filesize

    4KB