Analysis

  • max time kernel
    142s
  • max time network
    196s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    21-10-2022 07:17

General

  • Target

    976942aad93c4bcc20016400094ed1bb79a9bfb56fa72c94e15df3be9b8fa489.exe

  • Size

    788KB

  • MD5

    13f3895c5959682a0d364fe152ac900c

  • SHA1

    4c005dfea4568ac4439a24207c179d07b7852bb5

  • SHA256

    976942aad93c4bcc20016400094ed1bb79a9bfb56fa72c94e15df3be9b8fa489

  • SHA512

    350b54425b3bdc214fe7f16453edeafb135969c77075650b1a804eb2161c85bcf06d894857ac4900c547159c9df6602a2ac931102c825c81f14aa27fb648dfe1

  • SSDEEP

    24576:IdtP2cbksTpugRNJI5kFMJF9OWjwjLz3B:hgq8

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

91.236.116.142:5888

Mutex

d995ed82-bf13-4043-b564-f5f89f8c5209

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    91.236.116.142

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2017-01-07T03:01:54.729778636Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    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

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    5888

  • default_group

    Spy

  • 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

    d995ed82-bf13-4043-b564-f5f89f8c5209

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    91.236.116.142

  • 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.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • 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 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\976942aad93c4bcc20016400094ed1bb79a9bfb56fa72c94e15df3be9b8fa489.exe
    "C:\Users\Admin\AppData\Local\Temp\976942aad93c4bcc20016400094ed1bb79a9bfb56fa72c94e15df3be9b8fa489.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:904
    • C:\Users\Admin\AppData\Roaming\app.exe
      "C:\Users\Admin\AppData\Roaming\app.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1264
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\aspnet_compiler.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\aspnet_compiler.exe"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1708
        • C:\Windows\SysWOW64\schtasks.exe
          "schtasks.exe" /create /f /tn "SCSI Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp5996.tmp"
          4⤵
          • Creates scheduled task(s)
          PID:1476

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    340B

    MD5

    f80ea1bebb6b5502ef40ffa28c627b7d

    SHA1

    5afd7a4cf8356883a4e425b261f7c9d9a3f62941

    SHA256

    c1fad8da321ee95b1e107b764f9b3fa4a8fcf8855f24151e06246741935f9af5

    SHA512

    8604e7c5068ef89199a480c3db09cd64ac6ad83195da41ba2e507b0540480b9b4116d7e04d289a5f0a90a285041560c57bed0ddbe5ff5947719a4987f59202d6

  • C:\Users\Admin\AppData\Local\Temp\tmp5996.tmp

    Filesize

    1KB

    MD5

    d81eb43d26d4511c44151cba2eb45983

    SHA1

    135c98e039c6ab35d4e9564f15f9c56dc9dbeb9a

    SHA256

    a72a8f6434d6b0fb904db5adc8cab891d12c53b4ac1435dfd13df51f84a2d4d0

    SHA512

    b5895c19159d23a8fa312967e47d0855ac6f8f314f8931f54469b0c0079a22e9e00a5eaf6729761f74d54e111454d49813e658243e920a9c3434a5576cdda721

  • C:\Users\Admin\AppData\Roaming\app.exe

    Filesize

    794KB

    MD5

    fa3df4f0fc6e0e0ebb40c15ec14dc4cf

    SHA1

    a4bb2c3470010e7e4d18779d04a64c16f9d3ae1a

    SHA256

    6e236dd821ef9406608aaba4428ce828dc45b2043adbcd34db11694835f5e162

    SHA512

    533f7ccccd28581be1126074777a20de50e6c0f83e54d343de302a91d112d341052c075b9a27e3f2bb4f0398c74932911a9fdbb9c1b2e63c19eee7610c238cb1

  • C:\Users\Admin\AppData\Roaming\app.exe

    Filesize

    794KB

    MD5

    fa3df4f0fc6e0e0ebb40c15ec14dc4cf

    SHA1

    a4bb2c3470010e7e4d18779d04a64c16f9d3ae1a

    SHA256

    6e236dd821ef9406608aaba4428ce828dc45b2043adbcd34db11694835f5e162

    SHA512

    533f7ccccd28581be1126074777a20de50e6c0f83e54d343de302a91d112d341052c075b9a27e3f2bb4f0398c74932911a9fdbb9c1b2e63c19eee7610c238cb1

  • \Users\Admin\AppData\Roaming\app.exe

    Filesize

    794KB

    MD5

    fa3df4f0fc6e0e0ebb40c15ec14dc4cf

    SHA1

    a4bb2c3470010e7e4d18779d04a64c16f9d3ae1a

    SHA256

    6e236dd821ef9406608aaba4428ce828dc45b2043adbcd34db11694835f5e162

    SHA512

    533f7ccccd28581be1126074777a20de50e6c0f83e54d343de302a91d112d341052c075b9a27e3f2bb4f0398c74932911a9fdbb9c1b2e63c19eee7610c238cb1

  • memory/904-54-0x0000000075BA1000-0x0000000075BA3000-memory.dmp

    Filesize

    8KB

  • memory/904-55-0x0000000074A40000-0x0000000074FEB000-memory.dmp

    Filesize

    5.7MB

  • memory/904-56-0x00000000002A6000-0x00000000002B7000-memory.dmp

    Filesize

    68KB

  • memory/904-57-0x0000000074A40000-0x0000000074FEB000-memory.dmp

    Filesize

    5.7MB

  • memory/904-61-0x0000000074A40000-0x0000000074FEB000-memory.dmp

    Filesize

    5.7MB

  • memory/904-64-0x00000000002A6000-0x00000000002B7000-memory.dmp

    Filesize

    68KB

  • memory/1264-69-0x0000000002196000-0x00000000021A7000-memory.dmp

    Filesize

    68KB

  • memory/1264-83-0x0000000074A40000-0x0000000074FEB000-memory.dmp

    Filesize

    5.7MB

  • memory/1264-68-0x0000000074A40000-0x0000000074FEB000-memory.dmp

    Filesize

    5.7MB

  • memory/1264-66-0x0000000074A40000-0x0000000074FEB000-memory.dmp

    Filesize

    5.7MB

  • memory/1264-59-0x0000000000000000-mapping.dmp

  • memory/1264-67-0x0000000002196000-0x00000000021A7000-memory.dmp

    Filesize

    68KB

  • memory/1264-84-0x0000000002196000-0x00000000021A7000-memory.dmp

    Filesize

    68KB

  • memory/1476-86-0x0000000000000000-mapping.dmp

  • memory/1708-71-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1708-77-0x000000000041E792-mapping.dmp

  • memory/1708-79-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1708-81-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1708-76-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1708-74-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1708-73-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1708-85-0x0000000074A40000-0x0000000074FEB000-memory.dmp

    Filesize

    5.7MB

  • memory/1708-70-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1708-88-0x0000000074A40000-0x0000000074FEB000-memory.dmp

    Filesize

    5.7MB