Analysis

  • max time kernel
    145s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    04/12/2023, 19:01

General

  • Target

    BCBP-FT-TRANSFER-287287912.scr.exe

  • Size

    476KB

  • MD5

    2afed36792d08f83bca5877f808612f2

  • SHA1

    fdc5f037f4d5b27c476f3ecb987810d90c40ff95

  • SHA256

    bbcd72e82d0511c6fda963e60a70d942e39e36e37ac225f75f3f5b9aa96b3e17

  • SHA512

    7a0de4f310101b73ad6736e01661244394aa0495e297f57bdee852d4005e9961554120ea2efa111090bba6b1545a48acd5ff2a96dedec92ac0735fc76f805b42

  • SSDEEP

    6144:b8LxBnaL3xX0XBxA4a76P34sAkTJDk/+rNx0kFGE/LK3auc17tTcGrAwDVaAX:aaLWXpa7u343IJ4+Zx0Qci1rU8o6

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

multipleentry90dayscontroller.homingbeacon.net:54980

Mutex

6df769ca-fa90-4d27-be6c-663c699e6628

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2023-07-28T11:56:28.201018636Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    true

  • connect_delay

    4000

  • connection_port

    54980

  • default_group

    K59

  • 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

    6df769ca-fa90-4d27-be6c-663c699e6628

  • mutex_timeout

    5000

  • prevent_system_sleep

    true

  • primary_connection_host

    multipleentry90dayscontroller.homingbeacon.net

  • primary_dns_server

    8.8.8.8

  • 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.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 2 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).

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\BCBP-FT-TRANSFER-287287912.scr.exe
    "C:\Users\Admin\AppData\Local\Temp\BCBP-FT-TRANSFER-287287912.scr.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2196
    • C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe
      "C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:1632
      • C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe
        "C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe"
        3⤵
        • Executes dropped EXE
        • 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:2156

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Program Files (x86)\TCP Service\tcpsv.exe

          Filesize

          176KB

          MD5

          dcb26c9bfc1b5d7ce5d51c3b87c37daa

          SHA1

          824e47ae0d2ef729977f162c019aba515575eabf

          SHA256

          cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d

          SHA512

          de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35

        • C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe

          Filesize

          176KB

          MD5

          dcb26c9bfc1b5d7ce5d51c3b87c37daa

          SHA1

          824e47ae0d2ef729977f162c019aba515575eabf

          SHA256

          cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d

          SHA512

          de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35

        • C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe

          Filesize

          176KB

          MD5

          dcb26c9bfc1b5d7ce5d51c3b87c37daa

          SHA1

          824e47ae0d2ef729977f162c019aba515575eabf

          SHA256

          cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d

          SHA512

          de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35

        • C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe

          Filesize

          176KB

          MD5

          dcb26c9bfc1b5d7ce5d51c3b87c37daa

          SHA1

          824e47ae0d2ef729977f162c019aba515575eabf

          SHA256

          cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d

          SHA512

          de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35

        • C:\Users\Admin\AppData\Local\Temp\xdxmt.s

          Filesize

          300KB

          MD5

          f4aa88a2bdd058cf0f9263c8d9207102

          SHA1

          399a192bbac02ec52cfee904aa1ee2fad0369aad

          SHA256

          2bcb37bd3f65d6135c329e502c2ef0909572c3fa480947cc6fe23252d41cdf33

          SHA512

          9e3428b01280b92af142db29b9c9ca6ede2a210a8617190bbecaf7504c661f6cab66d10926dac49b9864417f9667a867109fd312f012f9a487388a622bde80de

        • \Users\Admin\AppData\Local\Temp\gpaxjkfx.exe

          Filesize

          176KB

          MD5

          dcb26c9bfc1b5d7ce5d51c3b87c37daa

          SHA1

          824e47ae0d2ef729977f162c019aba515575eabf

          SHA256

          cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d

          SHA512

          de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35

        • \Users\Admin\AppData\Local\Temp\gpaxjkfx.exe

          Filesize

          176KB

          MD5

          dcb26c9bfc1b5d7ce5d51c3b87c37daa

          SHA1

          824e47ae0d2ef729977f162c019aba515575eabf

          SHA256

          cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d

          SHA512

          de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35

        • memory/1632-14-0x0000000000400000-0x0000000000431000-memory.dmp

          Filesize

          196KB

        • memory/1632-6-0x0000000000400000-0x0000000000431000-memory.dmp

          Filesize

          196KB

        • memory/2156-11-0x0000000000400000-0x000000000044A000-memory.dmp

          Filesize

          296KB

        • memory/2156-15-0x0000000000400000-0x000000000044A000-memory.dmp

          Filesize

          296KB

        • memory/2156-16-0x0000000000400000-0x000000000044A000-memory.dmp

          Filesize

          296KB

        • memory/2156-17-0x0000000074B30000-0x00000000750DB000-memory.dmp

          Filesize

          5.7MB

        • memory/2156-18-0x0000000001DF0000-0x0000000001E30000-memory.dmp

          Filesize

          256KB

        • memory/2156-19-0x0000000074B30000-0x00000000750DB000-memory.dmp

          Filesize

          5.7MB

        • memory/2156-20-0x0000000001DF0000-0x0000000001E30000-memory.dmp

          Filesize

          256KB

        • memory/2156-24-0x0000000074B30000-0x00000000750DB000-memory.dmp

          Filesize

          5.7MB

        • memory/2156-25-0x0000000074B30000-0x00000000750DB000-memory.dmp

          Filesize

          5.7MB