Analysis

  • max time kernel
    151s
  • max time network
    157s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 02:11

General

  • Target

    13- CIVCO.exe

  • Size

    858KB

  • MD5

    a5cf4dcadf3f133879b124d00fbf63e0

  • SHA1

    e6090de532e0bdc2c6f2daa8191ed905b069c5d1

  • SHA256

    8133b96955c936b094a7bfe2351554503c31ffd075767e0d5b735dd90a024dd4

  • SHA512

    9b51847507f0d73bf850afe18ce58bcc4a5c58ed7cc670730810d81f9e6e96c76fda5ee967736a2631f9b704a6bb36616f73d3d97a94a2de5b45e358ae33e3a2

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

helixsohum-59977.portmap.io:59977

Mutex

b503f318-d700-4046-a22f-59d4605e0541

Attributes
  • activate_away_mode

    false

  • backup_connection_host

    helixsohum-59977.portmap.io

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-06-12T04:38:34.687559536Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    59977

  • default_group

    Appollo Result

  • 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

    b503f318-d700-4046-a22f-59d4605e0541

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    helixsohum-59977.portmap.io

  • 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). 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\13- CIVCO.exe
    "C:\Users\Admin\AppData\Local\Temp\13- CIVCO.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:892
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\tQHepANY" /XML "C:\Users\Admin\AppData\Local\Temp\tmpDA1A.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1992
    • C:\Users\Admin\AppData\Local\Temp\13- CIVCO.exe
      "C:\Users\Admin\AppData\Local\Temp\13- CIVCO.exe"
      2⤵
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1956

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Discovery

System Information Discovery

2
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpDA1A.tmp
    Filesize

    1KB

    MD5

    f1a511ae56b950927de83ed024c914ce

    SHA1

    89e10517f66b193feaa07cd3c34ecdaeed691689

    SHA256

    fb24ee233bc0215930acb4ae536bce1bb55735abd5236b6b186f54ba901bfb68

    SHA512

    76ae290c94ab08dd18d077223316763dd61ab1af16f476fdd6802beb036e9c09361109af07724f282689171086e98a61a890ad807b9595a17bfdb34b13bbe2cf

  • memory/892-55-0x0000000075801000-0x0000000075803000-memory.dmp
    Filesize

    8KB

  • memory/892-56-0x0000000000510000-0x0000000000520000-memory.dmp
    Filesize

    64KB

  • memory/892-57-0x0000000004320000-0x0000000004392000-memory.dmp
    Filesize

    456KB

  • memory/892-58-0x0000000002010000-0x0000000002058000-memory.dmp
    Filesize

    288KB

  • memory/892-54-0x0000000000B30000-0x0000000000C0C000-memory.dmp
    Filesize

    880KB

  • memory/1956-62-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1956-61-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1956-64-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1956-65-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1956-67-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1956-68-0x000000000041E792-mapping.dmp
  • memory/1956-70-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1956-72-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1956-74-0x00000000004E0000-0x00000000004EA000-memory.dmp
    Filesize

    40KB

  • memory/1956-75-0x0000000000590000-0x00000000005AE000-memory.dmp
    Filesize

    120KB

  • memory/1956-76-0x00000000004F0000-0x00000000004FA000-memory.dmp
    Filesize

    40KB

  • memory/1992-59-0x0000000000000000-mapping.dmp