Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    29-04-2024 04:26

General

  • Target

    gK5vkTm6WAcfbiz.exe

  • Size

    630KB

  • MD5

    55abd8961bb1559aacdd14bc4abe2948

  • SHA1

    cff001eea9b43d712fbcc4cf9fb9b136f8c4109d

  • SHA256

    0117ba3b90a77a00da548bf15490d6623de69e535d75fbbce8279b91c82f5ef6

  • SHA512

    e5a6e38bc943c2b6fe7c157f3e719303c7b216edf3d483dd7c2b7a4267dd3d0d6b500015ef96d3c041e2032e6aabec6787bebb6f4af3f2070d9cb9fa8d2b4c2b

  • SSDEEP

    12288:KjB778QTJ4oNyNN1N84trNRngS5B2/JD3CJMJjEebEPs18VT1IMajPsWj6Mr:UBlJ4tNXN84NgSUtCW1EeAaihaDsWj6Q

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

december2nd.ddns.net:64418

december2n.duckdns.org:64418

Mutex

a73ea09a-fffa-47fc-8cf2-8699258828eb

Attributes
  • activate_away_mode

    false

  • backup_connection_host

    december2n.duckdns.org

  • backup_dns_server

  • buffer_size

    65538

  • build_time

    2024-02-03T01:52:12.147368736Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    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

  • clear_access_control

    false

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    64418

  • default_group

    NO GREE

  • enable_debug_mode

    true

  • gc_threshold

    1.0485772e+07

  • keep_alive_timeout

    30000

  • keyboard_logging

    false

  • lan_timeout

    2500

  • max_packet_size

    1.0485772e+07

  • mutex

    a73ea09a-fffa-47fc-8cf2-8699258828eb

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    december2nd.ddns.net

  • primary_dns_server

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    false

  • set_critical_process

    false

  • timeout_interval

    5000

  • use_custom_dns_server

    false

  • version

    1.2.2.0

  • wan_timeout

    8009

Signatures

  • NanoCore

    NanoCore is a remote access tool (RAT) with a variety of capabilities.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Creates scheduled task(s) 1 TTPs 3 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 29 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\gK5vkTm6WAcfbiz.exe
    "C:\Users\Admin\AppData\Local\Temp\gK5vkTm6WAcfbiz.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3040
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\gK5vkTm6WAcfbiz.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2020
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\ZYoQJBONC.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2588
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ZYoQJBONC" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6AF3.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2636
    • C:\Users\Admin\AppData\Local\Temp\gK5vkTm6WAcfbiz.exe
      "C:\Users\Admin\AppData\Local\Temp\gK5vkTm6WAcfbiz.exe"
      2⤵
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2448
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "TCP Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp6CC7.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:2320
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "TCP Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp6D45.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:2204

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp6AF3.tmp

    Filesize

    1KB

    MD5

    be13c83910daa3f8140ccaa37955ae09

    SHA1

    251722dee6e656c3619637c84534a478b26f63f9

    SHA256

    f470d74b713027aeed776d9f9b283908b997870bbe05a01b70a20a1adb436119

    SHA512

    ce5f42cc9c066efae25015ec6f5e3c749d1496d84dadfabb471ffd914879ffa42329585844ae84ab368adfd221287fd2076f4afaa0b3802b78236f8e01095312

  • C:\Users\Admin\AppData\Local\Temp\tmp6CC7.tmp

    Filesize

    1KB

    MD5

    d4561c71381b52aaedee04fb1dd48775

    SHA1

    c8c2ff059414c1e9fd75a6f4e69067de017f5358

    SHA256

    7a0ff9bd88d411effa13a431e003693a1a3e5b5f02d0b68a6f42db98cc214b09

    SHA512

    c1bd2bab168965624bcb758f360f87492a4dfadb11a95b6becc98b670f43aa49adc6cb1c93e4bbf44333993d59c697fd8450dc3ce7377a4ebdad3650684b962f

  • C:\Users\Admin\AppData\Local\Temp\tmp6D45.tmp

    Filesize

    1KB

    MD5

    93fc3117767507c9889abd12dc667d22

    SHA1

    1096e4cfa0c35756e3c3fb866c1e4c1e59115df9

    SHA256

    684997dd4ce15031cec8f2f93933b1d41d7bf5cbbff655dd64377b07055c449a

    SHA512

    e403348ee77bd3e7c45245dd5dae81c3ea130d5cf342f630982772ce5f75548b292013480e2831d68cf51349b64afde4589d4eec94b567d20f0a01e3b9549bdc

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\0BA9EGCNGG6II492GMWI.temp

    Filesize

    7KB

    MD5

    d1d97985337c3a84ce28c7e4de794c0d

    SHA1

    59963536963da19f29a2ce9768ff0f6e31ca1f14

    SHA256

    2c5ed845d76bb9feaa50dc63d884ce090f5665b9b87bfa4566b3034df5d35784

    SHA512

    326bb1e077b910ddc4a854456f154fd5d7dd18b3fa7eb96d6ce50252b59082fac5df1c73700cc3949835b044ff8bb1ad5230ec6450fad46448dbbc064c471695

  • memory/2448-27-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2448-25-0x0000000000400000-0x000000000043A000-memory.dmp

    Filesize

    232KB

  • memory/2448-42-0x0000000000690000-0x000000000069A000-memory.dmp

    Filesize

    40KB

  • memory/2448-41-0x0000000000620000-0x000000000063E000-memory.dmp

    Filesize

    120KB

  • memory/2448-40-0x0000000000610000-0x000000000061C000-memory.dmp

    Filesize

    48KB

  • memory/2448-28-0x0000000000400000-0x000000000043A000-memory.dmp

    Filesize

    232KB

  • memory/2448-30-0x0000000000400000-0x000000000043A000-memory.dmp

    Filesize

    232KB

  • memory/2448-29-0x0000000000400000-0x000000000043A000-memory.dmp

    Filesize

    232KB

  • memory/2448-39-0x0000000000600000-0x000000000060A000-memory.dmp

    Filesize

    40KB

  • memory/2448-19-0x0000000000400000-0x000000000043A000-memory.dmp

    Filesize

    232KB

  • memory/2448-23-0x0000000000400000-0x000000000043A000-memory.dmp

    Filesize

    232KB

  • memory/2448-21-0x0000000000400000-0x000000000043A000-memory.dmp

    Filesize

    232KB

  • memory/3040-5-0x0000000000360000-0x0000000000376000-memory.dmp

    Filesize

    88KB

  • memory/3040-31-0x0000000074BF0000-0x00000000752DE000-memory.dmp

    Filesize

    6.9MB

  • memory/3040-2-0x0000000004A90000-0x0000000004AD0000-memory.dmp

    Filesize

    256KB

  • memory/3040-1-0x0000000074BF0000-0x00000000752DE000-memory.dmp

    Filesize

    6.9MB

  • memory/3040-0-0x0000000000830000-0x00000000008D4000-memory.dmp

    Filesize

    656KB

  • memory/3040-3-0x0000000000330000-0x0000000000348000-memory.dmp

    Filesize

    96KB

  • memory/3040-4-0x0000000000350000-0x000000000035E000-memory.dmp

    Filesize

    56KB

  • memory/3040-6-0x0000000004760000-0x00000000047DC000-memory.dmp

    Filesize

    496KB