Analysis

  • max time kernel
    146s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    21-04-2021 14:06

General

  • Target

    30942ca86a84fe502f5fd7d82ad9fcca.exe

  • Size

    1.4MB

  • MD5

    30942ca86a84fe502f5fd7d82ad9fcca

  • SHA1

    dbbef61d1dea3d75d817bde033bbb46547064303

  • SHA256

    7e07bde93d122c059f5b159267f273d05ff8ac8bec540f3ae3bc7c8cd32f1fc7

  • SHA512

    a4e2b5d3f4dd4a6f8b60d86a2d1e851e9daa2b013cbbace6a9eef752a85c945331afc52e178181146dd2ca3291d812846e445a5313ade5bd6206151aa82447cd

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

79.134.225.50:83

nassiru1166.webhop.me:83

Mutex

ff5d7452-ecaf-474e-b312-1d34eb4979b2

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    nassiru1166.webhop.me

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2021-01-28T23:55:30.477872536Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    83

  • default_group

    Me Alone

  • 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

    ff5d7452-ecaf-474e-b312-1d34eb4979b2

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    79.134.225.50

  • 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.

  • 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 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\30942ca86a84fe502f5fd7d82ad9fcca.exe
    "C:\Users\Admin\AppData\Local\Temp\30942ca86a84fe502f5fd7d82ad9fcca.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:540
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\gLbxBhRIg" /XML "C:\Users\Admin\AppData\Local\Temp\tmp849B.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1764
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:612

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

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp849B.tmp
    MD5

    74d06b0c5d351209f604994e24cc4389

    SHA1

    e9eb8adc61610d28c4393760ab1fac4d2356bca6

    SHA256

    d113d87eb9ce67014838b43b768f9b704baefc4a92766a98f386e6c786d2418a

    SHA512

    6d1e3f6d4cd25e7a4314675047f7b6e16622d3dea917df5c27ab22e89c588c3352a812bbc80b0abd25cdacbfc4eb15c98b5eceb8bc1bf7cb9dac7182519dce68

  • memory/540-62-0x0000000004960000-0x0000000004961000-memory.dmp
    Filesize

    4KB

  • memory/540-63-0x0000000000710000-0x0000000000719000-memory.dmp
    Filesize

    36KB

  • memory/540-64-0x000000007EF40000-0x000000007EF41000-memory.dmp
    Filesize

    4KB

  • memory/540-65-0x0000000005220000-0x00000000052F2000-memory.dmp
    Filesize

    840KB

  • memory/540-66-0x0000000001000000-0x000000000108B000-memory.dmp
    Filesize

    556KB

  • memory/540-60-0x00000000010A0000-0x00000000010A1000-memory.dmp
    Filesize

    4KB

  • memory/612-80-0x0000000000800000-0x000000000080D000-memory.dmp
    Filesize

    52KB

  • memory/612-78-0x00000000006E0000-0x00000000006E7000-memory.dmp
    Filesize

    28KB

  • memory/612-70-0x000000000041E792-mapping.dmp
  • memory/612-71-0x0000000000400000-0x000000000048C000-memory.dmp
    Filesize

    560KB

  • memory/612-73-0x0000000004E60000-0x0000000004E61000-memory.dmp
    Filesize

    4KB

  • memory/612-74-0x0000000000640000-0x0000000000645000-memory.dmp
    Filesize

    20KB

  • memory/612-75-0x0000000000650000-0x000000000065D000-memory.dmp
    Filesize

    52KB

  • memory/612-76-0x0000000000660000-0x0000000000675000-memory.dmp
    Filesize

    84KB

  • memory/612-77-0x00000000006D0000-0x00000000006D6000-memory.dmp
    Filesize

    24KB

  • memory/612-69-0x0000000000400000-0x000000000048C000-memory.dmp
    Filesize

    560KB

  • memory/612-79-0x0000000000730000-0x0000000000736000-memory.dmp
    Filesize

    24KB

  • memory/612-88-0x0000000004E65000-0x0000000004E76000-memory.dmp
    Filesize

    68KB

  • memory/612-81-0x0000000000810000-0x0000000000819000-memory.dmp
    Filesize

    36KB

  • memory/612-82-0x0000000000830000-0x000000000083F000-memory.dmp
    Filesize

    60KB

  • memory/612-83-0x0000000000840000-0x000000000084A000-memory.dmp
    Filesize

    40KB

  • memory/612-84-0x00000000008C0000-0x00000000008D9000-memory.dmp
    Filesize

    100KB

  • memory/612-85-0x00000000008E0000-0x00000000008E3000-memory.dmp
    Filesize

    12KB

  • memory/612-86-0x0000000000C60000-0x0000000000C89000-memory.dmp
    Filesize

    164KB

  • memory/612-87-0x00000000008F0000-0x00000000008FF000-memory.dmp
    Filesize

    60KB

  • memory/1764-67-0x0000000000000000-mapping.dmp