Analysis

  • max time kernel
    151s
  • max time network
    158s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/10/2022, 11:17

General

  • Target
    Receipt.exe
  • Size 4.4MB
  • Sample221003-ndn5haddf2
  • SHA256 7ef24f6499dd9fc7809783a98febc44c2dc25a3f74d02c9bf8ddbae0d3b781c6
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • nanocore

Version
  • 1.2.2.0

C2
  • 103.141.138.125:24980

  • uzu.duckdns.org:24980

Mutex
  • a3d0ef0e-da9e-4060-826f-a1d3cec5d1ab

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    uzu.duckdns.org

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-07-15T09:51:14.740812336Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    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

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    24980

  • default_group

    Default

  • 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

    a3d0ef0e-da9e-4060-826f-a1d3cec5d1ab

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    103.141.138.125

  • 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.

  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 3 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
  • 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 14 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of WriteProcessMemory 45 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Receipt.exe
    "C:\Users\Admin\AppData\Local\Temp\Receipt.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4620
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANQAwAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4072
    • C:\Users\Admin\AppData\Local\Temp\Receipt.exe
      C:\Users\Admin\AppData\Local\Temp\Receipt.exe
      2⤵
        PID:1640
      • C:\Users\Admin\AppData\Local\Temp\Receipt.exe
        C:\Users\Admin\AppData\Local\Temp\Receipt.exe
        2⤵
        • Checks computer location settings
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4080
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMQA1AA==
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1104
        • C:\Users\Admin\AppData\Local\Temp\Jjevtcycwobbkqogufmsconfig1.exe
          "C:\Users\Admin\AppData\Local\Temp\Jjevtcycwobbkqogufmsconfig1.exe"
          3⤵
          • Executes dropped EXE
          • Checks computer location settings
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4524
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANAA1AA==
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:3824
          • C:\Users\Admin\AppData\Local\Temp\Jjevtcycwobbkqogufmsconfig1.exe
            C:\Users\Admin\AppData\Local\Temp\Jjevtcycwobbkqogufmsconfig1.exe
            4⤵
            • Executes dropped EXE
            PID:1968
        • C:\Users\Admin\AppData\Local\Temp\Receipt.exe
          C:\Users\Admin\AppData\Local\Temp\Receipt.exe
          3⤵
          • Checks whether UAC is enabled
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1712
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks.exe" /create /f /tn "DHCP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmpDE89.tmp"
            4⤵
            • Creates scheduled task(s)
            PID:2620

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          Receipt.exe.log

          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Receipt.exe.log
          • Size 1KB
          • SHA256 5ffb4a3ea94a6a53c4f88e2191c6fec5fd8a7336e367aa113fe8c12631e0c4d2
          • MD5 SHA1 SHA512

          powershell.exe.log

          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
          • Size 1KB
          • SHA256 e2486a1bdcba80dad6dd6210d7374bd70ae196a523c06ceda71370fd3ea78359
          • MD5 SHA1 SHA512

          ModuleAnalysisCache

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache
          • Size 53KB
          • SHA256 474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba
          • MD5 SHA1 SHA512 SSDEEP

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 16KB
          • SHA256 e56fc3e8db4f38859fd0aa05c31fbbdc82b6dda14aa96e17ba2354ff510101df
          • MD5 SHA1 SHA512 SSDEEP

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 15KB
          • SHA256 9691cb995affb4ca07c266c7348050f7903510c1d62a5a599b4979eea579a23b
          • MD5 SHA1 SHA512 SSDEEP

          Jjevtcycwobbkqogufmsconfig1.exe

          • Path C:\Users\Admin\AppData\Local\Temp\Jjevtcycwobbkqogufmsconfig1.exe
          • Size 1.5MB
          • SHA256 9cdcdcf6fa9cff782f459cf51f5d46be8a5eecaa9cfbc450d7dc0e1fe7cdbf2d
          • MD5 SHA1 SHA512 SSDEEP

          Jjevtcycwobbkqogufmsconfig1.exe

          • Path C:\Users\Admin\AppData\Local\Temp\Jjevtcycwobbkqogufmsconfig1.exe
          • Size 1.5MB
          • SHA256 9cdcdcf6fa9cff782f459cf51f5d46be8a5eecaa9cfbc450d7dc0e1fe7cdbf2d
          • MD5 SHA1 SHA512 SSDEEP

          Jjevtcycwobbkqogufmsconfig1.exe

          • Path C:\Users\Admin\AppData\Local\Temp\Jjevtcycwobbkqogufmsconfig1.exe
          • Size 1.5MB
          • SHA256 9cdcdcf6fa9cff782f459cf51f5d46be8a5eecaa9cfbc450d7dc0e1fe7cdbf2d
          • MD5 SHA1 SHA512 SSDEEP

          tmpDE89.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\tmpDE89.tmp
          • Size 1KB
          • SHA256 81e95deef89cee8ff8bd8ed99c4669dd3f9f53c92f5ca126f9d7097133e6dbd7
          • MD5 SHA1 SHA512

          memory/1712-158-0x0000000005540000-0x00000000055DC000-memory.dmp

          memory/1712-159-0x0000000005400000-0x000000000540A000-memory.dmp

          memory/1712-156-0x00000000059B0000-0x0000000005F54000-memory.dmp

          memory/1712-157-0x00000000054A0000-0x0000000005532000-memory.dmp

          memory/1712-155-0x0000000000400000-0x0000000000438000-memory.dmp

          memory/1968-165-0x0000000000400000-0x000000000043F000-memory.dmp

          memory/1968-168-0x0000000000400000-0x000000000043F000-memory.dmp

          memory/1968-167-0x0000000000400000-0x000000000043F000-memory.dmp

          memory/1968-169-0x0000000000400000-0x000000000043F000-memory.dmp

          memory/4072-141-0x0000000006950000-0x000000000696A000-memory.dmp

          memory/4072-136-0x0000000005630000-0x0000000005C58000-memory.dmp

          memory/4072-135-0x0000000002B60000-0x0000000002B96000-memory.dmp

          memory/4072-137-0x0000000005DD0000-0x0000000005E36000-memory.dmp

          memory/4072-138-0x0000000005E40000-0x0000000005EA6000-memory.dmp

          memory/4072-140-0x0000000007BE0000-0x000000000825A000-memory.dmp

          memory/4072-139-0x0000000006460000-0x000000000647E000-memory.dmp

          memory/4080-144-0x0000000000400000-0x0000000000706000-memory.dmp

          memory/4524-153-0x0000000000830000-0x00000000009BA000-memory.dmp

          memory/4620-132-0x0000000000D70000-0x00000000011D2000-memory.dmp

          memory/4620-133-0x0000000007050000-0x0000000007072000-memory.dmp