Analysis

  • max time kernel
    144s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/01/2024, 12:02

General

  • Target

    7a31a2743fd46eaac57e0facfa4cc550.exe

  • Size

    1.0MB

  • MD5

    7a31a2743fd46eaac57e0facfa4cc550

  • SHA1

    0b495b9d62c4504cb58d32c01f2718ce76ad27a8

  • SHA256

    f67ef0bea71caf8b6cb8b570304051aacce30cb42c51eec9d5bc10365b057430

  • SHA512

    174bfc47be92e1e0c3ac107b0a32227fdd31075380eb6f657f00d9d31e0d1d5abc2e22f299203090aab91d7d9e843039aa2516bc1fe63f05924f6dc5b1e970fb

  • SSDEEP

    12288:Ww8IpRoJiHDs2qVPA9I/9X6NIbwooBQZ:Ww84osHHU4S6ywo

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

judge777.ddns.net:8282

127.0.0.1:8282

Mutex

0ed357f7-1b88-47ff-bb68-1b617843f125

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    37.235.1.177

  • buffer_size

    65535

  • build_time

    2021-01-11T10:18:25.208357936Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    8282

  • default_group

    enzo

  • 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

    0ed357f7-1b88-47ff-bb68-1b617843f125

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    judge777.ddns.net

  • primary_dns_server

    37.235.1.174

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    false

  • 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 computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Unexpected DNS network traffic destination 4 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • 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 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 15 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7a31a2743fd46eaac57e0facfa4cc550.exe
    "C:\Users\Admin\AppData\Local\Temp\7a31a2743fd46eaac57e0facfa4cc550.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5052
    • 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\7a31a2743fd46eaac57e0facfa4cc550.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4832
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GoJyWEU.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1928
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GoJyWEU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE77D.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2304
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GoJyWEU.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4424
    • C:\Users\Admin\AppData\Local\Temp\7a31a2743fd46eaac57e0facfa4cc550.exe
      "C:\Users\Admin\AppData\Local\Temp\7a31a2743fd46eaac57e0facfa4cc550.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
      PID:4744
    • C:\Users\Admin\AppData\Local\Temp\7a31a2743fd46eaac57e0facfa4cc550.exe
      "C:\Users\Admin\AppData\Local\Temp\7a31a2743fd46eaac57e0facfa4cc550.exe"
      2⤵
        PID:4568

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

      Filesize

      2KB

      MD5

      3d086a433708053f9bf9523e1d87a4e8

      SHA1

      b3ab5d4f282a4c8fe8c3005b8a557ed5a0e37f28

      SHA256

      6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69

      SHA512

      931ae42b4c68a4507ff2342332b08eb407050d47cf4176137ea022d0f6e513c689e998445a04c6d18d4877391705c586bfce0234632b898d41aaed0957996dfd

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      18KB

      MD5

      d02ff7b5a3a592daf90946a04e5be1e6

      SHA1

      6535fa21ffade9221ed95804076719e7c752087b

      SHA256

      f8f04fd070dd4010b537c325a4a7750c5d51170588518ac1682701b9d7a2dfd4

      SHA512

      6ab0a97de931dca6d7596cfa94e0db56e095ef2f743cc9de64ada8bcfe7e217f3aaf0891e6437ba6995ca91c6c45cc02b28457d45bc44812e0be2890e1efe516

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      18KB

      MD5

      2649ceefa4f3d470754d711356a6b198

      SHA1

      1d693f204cc3e3505c232733363597b4fb0a63d4

      SHA256

      cb8855f20083c5fcf564e7be4c0298c98c2db286d358b2564410cca1c66b879f

      SHA512

      3f18ff84438e21ea5b55f175c8825c42d328d69afe729dc2bdaf4ee40bc108c74241bf03dd4655575774e911f84835778387140dd1ece57692a65374e3d3ec79

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4m2gb2c0.o00.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • C:\Users\Admin\AppData\Local\Temp\tmpE77D.tmp

      Filesize

      1KB

      MD5

      7b934c582ccc0210a00e4f5612cdffcc

      SHA1

      ec8b4afcd423da8f5d9d68f6125f152b7b54c5e2

      SHA256

      1f7c4c6035780c8160c279e0eff918b65a0b543bcb282a0495fa3d5316519c4c

      SHA512

      3f6eee58818f1e17a7bf4efc5d1d9c3165a0e566889cbb213ce8d62d1514af8ce65cd2fcc075b4c310d37d5d85a6243489cdafd17b6d3beef111b85755c20e14

    • memory/1928-106-0x0000000007E70000-0x0000000007E78000-memory.dmp

      Filesize

      32KB

    • memory/1928-34-0x0000000006150000-0x00000000061B6000-memory.dmp

      Filesize

      408KB

    • memory/1928-12-0x00000000053F0000-0x0000000005400000-memory.dmp

      Filesize

      64KB

    • memory/1928-64-0x000000007F310000-0x000000007F320000-memory.dmp

      Filesize

      64KB

    • memory/1928-14-0x00000000053F0000-0x0000000005400000-memory.dmp

      Filesize

      64KB

    • memory/1928-75-0x00000000053F0000-0x0000000005400000-memory.dmp

      Filesize

      64KB

    • memory/1928-98-0x0000000007B50000-0x0000000007B6A000-memory.dmp

      Filesize

      104KB

    • memory/1928-17-0x0000000072410000-0x0000000072BC0000-memory.dmp

      Filesize

      7.7MB

    • memory/1928-113-0x0000000072410000-0x0000000072BC0000-memory.dmp

      Filesize

      7.7MB

    • memory/1928-63-0x000000006F5D0000-0x000000006F61C000-memory.dmp

      Filesize

      304KB

    • memory/1928-85-0x0000000007A80000-0x0000000007B23000-memory.dmp

      Filesize

      652KB

    • memory/1928-36-0x00000000061C0000-0x0000000006226000-memory.dmp

      Filesize

      408KB

    • memory/4424-33-0x0000000002300000-0x0000000002310000-memory.dmp

      Filesize

      64KB

    • memory/4424-116-0x0000000072410000-0x0000000072BC0000-memory.dmp

      Filesize

      7.7MB

    • memory/4424-35-0x0000000002300000-0x0000000002310000-memory.dmp

      Filesize

      64KB

    • memory/4424-37-0x0000000072410000-0x0000000072BC0000-memory.dmp

      Filesize

      7.7MB

    • memory/4424-99-0x0000000002300000-0x0000000002310000-memory.dmp

      Filesize

      64KB

    • memory/4424-88-0x000000006F5D0000-0x000000006F61C000-memory.dmp

      Filesize

      304KB

    • memory/4744-119-0x00000000012A0000-0x00000000012B0000-memory.dmp

      Filesize

      64KB

    • memory/4744-22-0x0000000075580000-0x0000000075B31000-memory.dmp

      Filesize

      5.7MB

    • memory/4744-39-0x00000000012A0000-0x00000000012B0000-memory.dmp

      Filesize

      64KB

    • memory/4744-21-0x0000000075580000-0x0000000075B31000-memory.dmp

      Filesize

      5.7MB

    • memory/4744-117-0x00000000012A0000-0x00000000012B0000-memory.dmp

      Filesize

      64KB

    • memory/4744-15-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/4744-118-0x0000000075580000-0x0000000075B31000-memory.dmp

      Filesize

      5.7MB

    • memory/4832-60-0x0000000006E50000-0x0000000006E82000-memory.dmp

      Filesize

      200KB

    • memory/4832-103-0x00000000073C0000-0x00000000073CE000-memory.dmp

      Filesize

      56KB

    • memory/4832-86-0x0000000004A30000-0x0000000004A40000-memory.dmp

      Filesize

      64KB

    • memory/4832-62-0x000000006F5D0000-0x000000006F61C000-memory.dmp

      Filesize

      304KB

    • memory/4832-61-0x000000007F980000-0x000000007F990000-memory.dmp

      Filesize

      64KB

    • memory/4832-9-0x00000000048D0000-0x0000000004906000-memory.dmp

      Filesize

      216KB

    • memory/4832-59-0x0000000006430000-0x000000000647C000-memory.dmp

      Filesize

      304KB

    • memory/4832-58-0x0000000005E40000-0x0000000005E5E000-memory.dmp

      Filesize

      120KB

    • memory/4832-100-0x0000000007200000-0x000000000720A000-memory.dmp

      Filesize

      40KB

    • memory/4832-87-0x00000000077D0000-0x0000000007E4A000-memory.dmp

      Filesize

      6.5MB

    • memory/4832-38-0x00000000059E0000-0x0000000005D34000-memory.dmp

      Filesize

      3.3MB

    • memory/4832-101-0x0000000007410000-0x00000000074A6000-memory.dmp

      Filesize

      600KB

    • memory/4832-102-0x0000000007390000-0x00000000073A1000-memory.dmp

      Filesize

      68KB

    • memory/4832-74-0x0000000006390000-0x00000000063AE000-memory.dmp

      Filesize

      120KB

    • memory/4832-104-0x00000000073D0000-0x00000000073E4000-memory.dmp

      Filesize

      80KB

    • memory/4832-28-0x0000000004FA0000-0x0000000004FC2000-memory.dmp

      Filesize

      136KB

    • memory/4832-105-0x00000000074D0000-0x00000000074EA000-memory.dmp

      Filesize

      104KB

    • memory/4832-109-0x0000000072410000-0x0000000072BC0000-memory.dmp

      Filesize

      7.7MB

    • memory/4832-10-0x0000000072410000-0x0000000072BC0000-memory.dmp

      Filesize

      7.7MB

    • memory/4832-13-0x0000000005070000-0x0000000005698000-memory.dmp

      Filesize

      6.2MB

    • memory/4832-11-0x0000000004A30000-0x0000000004A40000-memory.dmp

      Filesize

      64KB

    • memory/5052-18-0x0000000075580000-0x0000000075B31000-memory.dmp

      Filesize

      5.7MB

    • memory/5052-0-0x0000000075580000-0x0000000075B31000-memory.dmp

      Filesize

      5.7MB

    • memory/5052-3-0x0000000075580000-0x0000000075B31000-memory.dmp

      Filesize

      5.7MB

    • memory/5052-2-0x0000000075580000-0x0000000075B31000-memory.dmp

      Filesize

      5.7MB

    • memory/5052-1-0x00000000011E0000-0x00000000011F0000-memory.dmp

      Filesize

      64KB