Analysis

  • max time kernel
    152s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7v200722
  • submitted
    31-07-2020 12:02

General

  • Target

    Bank Swift_7312020_PDF.exe

  • Size

    717KB

  • MD5

    af2b7dc34bb7a628d97a909ae54159a1

  • SHA1

    99fe057c3bc249bcc23be977c5fc694eeb437566

  • SHA256

    93e44f3a49647573e0de42b29d80a9ce0af5cb879417e6a3f6a238d88979c662

  • SHA512

    5a711750b3178465b744e6d6af88e9da0f3739bb40101fce270963052136a304c7d825a2b6e490da9ff8dfe7f72bc43a16e210ac464ae9f1c00d7b6ce58af12e

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

79.134.225.71:1990

Mutex

5fd0d027-cda9-482d-9afc-936cf207303c

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    79.134.225.71

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-05-10T12:21:42.299711836Z

  • 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

    1990

  • 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

    5fd0d027-cda9-482d-9afc-936cf207303c

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    79.134.225.71

  • 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

  • Suspicious behavior: EnumeratesProcesses 1367 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • NanoCore

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

  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • UPX packed file 6 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Drops file in Program Files directory 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Bank Swift_7312020_PDF.exe
    "C:\Users\Admin\AppData\Local\Temp\Bank Swift_7312020_PDF.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    PID:108
    • C:\Users\Admin\AppData\Local\Temp\Bank Swift_7312020_PDF.exe
      "C:\Users\Admin\AppData\Local\Temp\Bank Swift_7312020_PDF.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      • Suspicious use of AdjustPrivilegeToken
      • Checks whether UAC is enabled
      • Suspicious behavior: GetForegroundWindowSpam
      • Drops file in Program Files directory
      • Adds Run key to start application
      PID:788
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "SCSI Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmpDE6C.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:1760
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "SCSI Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpE050.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:1116
    • C:\Users\Admin\AppData\Local\Temp\Bank Swift_7312020_PDF.exe
      "C:\Users\Admin\AppData\Local\Temp\Bank Swift_7312020_PDF.exe" 2 788 118217
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:752

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

1
T1112

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpDE6C.tmp
  • C:\Users\Admin\AppData\Local\Temp\tmpE050.tmp
  • memory/752-2-0x0000000000000000-mapping.dmp
  • memory/788-0-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/788-1-0x000000000047D710-mapping.dmp
  • memory/788-3-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/788-4-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/788-5-0x00000000002A0000-0x00000000002D8000-memory.dmp
    Filesize

    224KB

  • memory/788-6-0x0000000001EA2000-0x0000000001EA3000-memory.dmp
    Filesize

    4KB

  • memory/788-7-0x0000000000220000-0x0000000000253000-memory.dmp
    Filesize

    204KB

  • memory/1116-11-0x0000000000000000-mapping.dmp
  • memory/1760-9-0x0000000000000000-mapping.dmp