Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06-09-2022 11:45

General

  • Target

    PROOF OF PAYMENT.exe

  • Size

    24KB

  • MD5

    7f99d249840dc2c5009b4771f887336e

  • SHA1

    0a4de6946dca7444da62b7794bcb59e553108f0c

  • SHA256

    fc15ab19130fccdae7dee477e0ae6d711fe3492cbac1b7e5d472eae4902f9516

  • SHA512

    2dc950577ee4fa9b999d044cbb93aa365b13eb5a012633e7ec61410536790080c6c2f3be9f684ac3f11694b51d40d4732aa9975d91fd0c2b68c6e9d66a204237

  • SSDEEP

    384:JwkCN7n8OIo3A12++XCCvcXEMA+7QEh2Fobm22:5CNz8OBnMA8R2

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

amechi.duckdns.org:4190

Mutex

7766992d-5166-4919-9d26-1d114e11093c

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    amechi.duckdns.org

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-06-17T10:10:35.253943636Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    4190

  • default_group

    NEW TRY FOR SUCCESS

  • 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

    7766992d-5166-4919-9d26-1d114e11093c

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    amechi.duckdns.org

  • 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 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 35 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious behavior: MapViewOfSection 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3064
    • C:\Users\Admin\AppData\Local\Temp\PROOF OF PAYMENT.exe
      "C:\Users\Admin\AppData\Local\Temp\PROOF OF PAYMENT.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4392
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMwAxAA==
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4984
      • C:\Users\Admin\AppData\Local\Temp\Bjlavuqqxsfvuyykucvpptdbin.exe
        "C:\Users\Admin\AppData\Local\Temp\Bjlavuqqxsfvuyykucvpptdbin.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of AdjustPrivilegeToken
        PID:4912
      • C:\Users\Admin\AppData\Local\Temp\PROOF OF PAYMENT.exe
        "C:\Users\Admin\AppData\Local\Temp\PROOF OF PAYMENT.exe"
        3⤵
        • 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:3508
    • C:\Windows\SysWOW64\colorcpl.exe
      "C:\Windows\SysWOW64\colorcpl.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Modifies Internet Explorer settings
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:404
      • C:\Program Files\Mozilla Firefox\Firefox.exe
        "C:\Program Files\Mozilla Firefox\Firefox.exe"
        3⤵
          PID:3648

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    2
    T1112

    Discovery

    Query Registry

    1
    T1012

    System Information Discovery

    3
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\PROOF OF PAYMENT.exe.log
      Filesize

      1KB

      MD5

      4f3fab3e5f44399e7f4162fd367eca2d

      SHA1

      adada0591db5f53bcc0565942047156de3464e6e

      SHA256

      5db52f2a6a0fbfaa29e27418a1b72b660298dfa58a12ac0f12897a06e557caef

      SHA512

      d8c3fe3a91e572627e31a44d88a71fc3072786b074d04484ff6aacfeab43e0d29ec88bf6ad2af2a5f8e70f0c0eea95dcea59a8159adf4c642e5f8fd5fc632db7

    • C:\Users\Admin\AppData\Local\Temp\Bjlavuqqxsfvuyykucvpptdbin.exe
      Filesize

      185KB

      MD5

      81a6c3beb08a0f5029528dbbaa991dd7

      SHA1

      cca8dd79b8a4710baa1726a476227b3e25ecf056

      SHA256

      096a5d8dd996c380d7fc28c0350836b9c3cdf2651099869eb64b430145af939d

      SHA512

      1332f16ef45280e74976a29766b468c7f0679744bbe6382b25b85ce60c5d4e0e3af22f537307be62f2ba0276519ad5b90e42e32c41d34287009ca3cbbcf1a366

    • C:\Users\Admin\AppData\Local\Temp\Bjlavuqqxsfvuyykucvpptdbin.exe
      Filesize

      185KB

      MD5

      81a6c3beb08a0f5029528dbbaa991dd7

      SHA1

      cca8dd79b8a4710baa1726a476227b3e25ecf056

      SHA256

      096a5d8dd996c380d7fc28c0350836b9c3cdf2651099869eb64b430145af939d

      SHA512

      1332f16ef45280e74976a29766b468c7f0679744bbe6382b25b85ce60c5d4e0e3af22f537307be62f2ba0276519ad5b90e42e32c41d34287009ca3cbbcf1a366

    • memory/404-157-0x0000000002210000-0x000000000229F000-memory.dmp
      Filesize

      572KB

    • memory/404-153-0x00000000006B0000-0x00000000006C9000-memory.dmp
      Filesize

      100KB

    • memory/404-154-0x00000000004A0000-0x00000000004CD000-memory.dmp
      Filesize

      180KB

    • memory/404-152-0x0000000000000000-mapping.dmp
    • memory/404-155-0x00000000023E0000-0x000000000272A000-memory.dmp
      Filesize

      3.3MB

    • memory/404-156-0x00000000004A0000-0x00000000004CD000-memory.dmp
      Filesize

      180KB

    • memory/3064-163-0x0000000007C10000-0x0000000007CF3000-memory.dmp
      Filesize

      908KB

    • memory/3064-158-0x0000000007C10000-0x0000000007CF3000-memory.dmp
      Filesize

      908KB

    • memory/3064-151-0x0000000007AF0000-0x0000000007C0D000-memory.dmp
      Filesize

      1.1MB

    • memory/3508-159-0x0000000000000000-mapping.dmp
    • memory/3508-160-0x0000000000400000-0x0000000000438000-memory.dmp
      Filesize

      224KB

    • memory/3508-162-0x0000000004D90000-0x0000000004E2C000-memory.dmp
      Filesize

      624KB

    • memory/4392-136-0x0000000006AD0000-0x0000000006AF2000-memory.dmp
      Filesize

      136KB

    • memory/4392-135-0x00000000053B0000-0x00000000053BA000-memory.dmp
      Filesize

      40KB

    • memory/4392-132-0x0000000000820000-0x000000000082C000-memory.dmp
      Filesize

      48KB

    • memory/4392-134-0x0000000005310000-0x00000000053A2000-memory.dmp
      Filesize

      584KB

    • memory/4392-133-0x0000000005810000-0x0000000005DB4000-memory.dmp
      Filesize

      5.6MB

    • memory/4912-148-0x0000000000B90000-0x0000000000BBF000-memory.dmp
      Filesize

      188KB

    • memory/4912-150-0x0000000001100000-0x0000000001110000-memory.dmp
      Filesize

      64KB

    • memory/4912-149-0x0000000001620000-0x000000000196A000-memory.dmp
      Filesize

      3.3MB

    • memory/4912-145-0x0000000000000000-mapping.dmp
    • memory/4984-144-0x00000000065C0000-0x00000000065DA000-memory.dmp
      Filesize

      104KB

    • memory/4984-143-0x00000000077E0000-0x0000000007E5A000-memory.dmp
      Filesize

      6.5MB

    • memory/4984-142-0x00000000060D0000-0x00000000060EE000-memory.dmp
      Filesize

      120KB

    • memory/4984-141-0x0000000005A80000-0x0000000005AE6000-memory.dmp
      Filesize

      408KB

    • memory/4984-140-0x00000000058E0000-0x0000000005946000-memory.dmp
      Filesize

      408KB

    • memory/4984-139-0x0000000005240000-0x0000000005868000-memory.dmp
      Filesize

      6.2MB

    • memory/4984-138-0x0000000002B00000-0x0000000002B36000-memory.dmp
      Filesize

      216KB

    • memory/4984-137-0x0000000000000000-mapping.dmp