Analysis

  • max time kernel
    68s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    07-02-2023 02:36

General

  • Target

    c77e5db3244e658843f06ae2e61ad95f.exe

  • Size

    133KB

  • MD5

    c77e5db3244e658843f06ae2e61ad95f

  • SHA1

    5bcf4c83cd1218db713c1be89369e368c6c0f115

  • SHA256

    97ac2f7c9ff8e79aa217a8bac22bc9575cecb39bc87bcd753d428c56ea4899c9

  • SHA512

    0d62eaaf493e840d4fe0c96cde1d8d1c76377789c1e99817426e39d16573a4a8de722d3c337a100e2a3c74bea7f1d89e5e494b0587b4c6114eb33b8b0c31d339

  • SSDEEP

    3072:BI7KpEaKA2L22xYWVVz8pWzWpBZ7ubozFyTO1wbCl9fGJu:u7kKAhI8pWzWpB0boQMZGJ

Malware Config

Extracted

Family

blacknet

Botnet

ec

C2

NriE0EakUiK+22Ai4N6Othh0De1s55kV0+sFoXChkQhcVCI2dUu3XGlBV5pu/x/cmJ/BByQIf9PqFghM2sWKP07Iz1Om2nFj+5Ad12ZaY4I9PtWNNix+MC57LiawhMvDUqvUZ0D9AMzT8Ml3Nn9NF/VG4jr2jwHli/295QeYGFGuN7RO/IqZPFblPfaRqq3BNeE7xgdHFMHJVcwvHA4s0oso3I6avTLaxL57NqpSPVJhEZ1yPk4qQWERPXxXoS+1Wp4lQUuVgRpkdjgjhF3IjONn1RIO+3lwJvDoUCLTzG1IxQGrYB+xHSLQ6jCzByfdvDqCc0Jpf0uylVa3q6zmPQ==

Mutex

BN[UfwxTUeC-7463479]

Attributes
  • antivm

    false

  • elevate_uac

    true

  • install_name

    WindowsUpdate.exe

  • splitter

    |BN|

  • start_name

    cde2f914e4cce7f13b2c1cec7b6da970

  • startup

    false

  • usb_spread

    true

Signatures

  • BlackNET

    BlackNET is an open source remote access tool written in VB.NET.

  • BlackNET payload 2 IoCs
  • Contains code to disable Windows Defender 2 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs
  • Executes dropped EXE 2 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 1 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 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c77e5db3244e658843f06ae2e61ad95f.exe
    "C:\Users\Admin\AppData\Local\Temp\c77e5db3244e658843f06ae2e61ad95f.exe"
    1⤵
    • Modifies Windows Defender Real-time Protection settings
    • Windows security modification
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1784
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" Get-MpPreference -verbose
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1900
    • C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe
      "C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe"
      2⤵
      • Executes dropped EXE
      • Windows security modification
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1684
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" Get-MpPreference -verbose
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1936
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /f /sc ONSTART /RL HIGHEST /tn "'WindowsUpdate"' /tr "'C:\Users\Admin\AppData\Local\Temp\WindowsUpdate.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:1252
      • C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\svchosts.exe
        "C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\svchosts.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:1692

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Modify Existing Service

1
T1031

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

3
T1112

Disabling Security Tools

2
T1089

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe
    Filesize

    133KB

    MD5

    c77e5db3244e658843f06ae2e61ad95f

    SHA1

    5bcf4c83cd1218db713c1be89369e368c6c0f115

    SHA256

    97ac2f7c9ff8e79aa217a8bac22bc9575cecb39bc87bcd753d428c56ea4899c9

    SHA512

    0d62eaaf493e840d4fe0c96cde1d8d1c76377789c1e99817426e39d16573a4a8de722d3c337a100e2a3c74bea7f1d89e5e494b0587b4c6114eb33b8b0c31d339

  • C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe
    Filesize

    133KB

    MD5

    c77e5db3244e658843f06ae2e61ad95f

    SHA1

    5bcf4c83cd1218db713c1be89369e368c6c0f115

    SHA256

    97ac2f7c9ff8e79aa217a8bac22bc9575cecb39bc87bcd753d428c56ea4899c9

    SHA512

    0d62eaaf493e840d4fe0c96cde1d8d1c76377789c1e99817426e39d16573a4a8de722d3c337a100e2a3c74bea7f1d89e5e494b0587b4c6114eb33b8b0c31d339

  • C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\svchosts.exe
    Filesize

    18KB

    MD5

    d133d370c3858c9811e70f95d554d2c6

    SHA1

    bb09b1253ce571a49b76951283883a3499588295

    SHA256

    87a1711030512dd414bcbab0659a2b51c0c16505bd8a068a282a1cc2c9fdf93b

    SHA512

    db4d41fca43e496b2b0d8d47d936a9ce204e3b6c4c669a8a9810362776a977b5337359b843fcd1d20004455d2c91f9790b3accb5352f4e55ec53c7e5d359d778

  • C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\svchosts.exe
    Filesize

    18KB

    MD5

    d133d370c3858c9811e70f95d554d2c6

    SHA1

    bb09b1253ce571a49b76951283883a3499588295

    SHA256

    87a1711030512dd414bcbab0659a2b51c0c16505bd8a068a282a1cc2c9fdf93b

    SHA512

    db4d41fca43e496b2b0d8d47d936a9ce204e3b6c4c669a8a9810362776a977b5337359b843fcd1d20004455d2c91f9790b3accb5352f4e55ec53c7e5d359d778

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
    Filesize

    7KB

    MD5

    1378e490c0b7f5dc9b4fd534087d0ec5

    SHA1

    9788733cf9cdc02a3769f01beead8b796bcf36fa

    SHA256

    23c9f5fbef6181200f2b3f9ead32efc9fa2aae211b881d89dba047c12641b2b8

    SHA512

    ab62063146a9c09ff9ebfcc79fbda8797d2d0454cd38e229920706fe9c142b1f704b0c4253c9974f98836389ffcb60e41d56785282ee1f6beb7f1c0a71c72a07

  • memory/1252-81-0x0000000000000000-mapping.dmp
  • memory/1684-108-0x0000000001FE6000-0x0000000001FE9000-memory.dmp
    Filesize

    12KB

  • memory/1684-112-0x0000000001FB6000-0x0000000001FD5000-memory.dmp
    Filesize

    124KB

  • memory/1684-62-0x000007FEF40A0000-0x000007FEF4AC3000-memory.dmp
    Filesize

    10.1MB

  • memory/1684-116-0x0000000001FFB000-0x0000000001FFF000-memory.dmp
    Filesize

    16KB

  • memory/1684-123-0x000000001D319000-0x000000001D321000-memory.dmp
    Filesize

    32KB

  • memory/1684-93-0x0000000002003000-0x0000000002007000-memory.dmp
    Filesize

    16KB

  • memory/1684-121-0x0000000002027000-0x0000000002030000-memory.dmp
    Filesize

    36KB

  • memory/1684-120-0x000000000201F000-0x0000000002027000-memory.dmp
    Filesize

    32KB

  • memory/1684-119-0x0000000002017000-0x000000000201F000-memory.dmp
    Filesize

    32KB

  • memory/1684-118-0x0000000002013000-0x0000000002017000-memory.dmp
    Filesize

    16KB

  • memory/1684-72-0x0000000001FB6000-0x0000000001FD5000-memory.dmp
    Filesize

    124KB

  • memory/1684-117-0x0000000001FFF000-0x0000000002003000-memory.dmp
    Filesize

    16KB

  • memory/1684-115-0x0000000001FF7000-0x0000000001FFB000-memory.dmp
    Filesize

    16KB

  • memory/1684-94-0x0000000002007000-0x000000000200B000-memory.dmp
    Filesize

    16KB

  • memory/1684-65-0x000007FEF3000000-0x000007FEF4096000-memory.dmp
    Filesize

    16.6MB

  • memory/1684-114-0x0000000002007000-0x000000000200B000-memory.dmp
    Filesize

    16KB

  • memory/1684-113-0x0000000002003000-0x0000000002007000-memory.dmp
    Filesize

    16KB

  • memory/1684-97-0x000000000200F000-0x0000000002013000-memory.dmp
    Filesize

    16KB

  • memory/1684-109-0x0000000001FD6000-0x0000000001FD9000-memory.dmp
    Filesize

    12KB

  • memory/1684-58-0x0000000000000000-mapping.dmp
  • memory/1684-106-0x000000001D339000-0x000000001D349000-memory.dmp
    Filesize

    64KB

  • memory/1684-105-0x000000001D331000-0x000000001D339000-memory.dmp
    Filesize

    32KB

  • memory/1684-104-0x000000001D329000-0x000000001D331000-memory.dmp
    Filesize

    32KB

  • memory/1684-103-0x000000001D321000-0x000000001D329000-memory.dmp
    Filesize

    32KB

  • memory/1684-102-0x000000001D319000-0x000000001D321000-memory.dmp
    Filesize

    32KB

  • memory/1684-101-0x000000001D310000-0x000000001D319000-memory.dmp
    Filesize

    36KB

  • memory/1684-100-0x0000000002027000-0x0000000002030000-memory.dmp
    Filesize

    36KB

  • memory/1684-88-0x0000000001FF7000-0x0000000001FFB000-memory.dmp
    Filesize

    16KB

  • memory/1684-90-0x0000000001FFB000-0x0000000001FFF000-memory.dmp
    Filesize

    16KB

  • memory/1684-99-0x000000000201F000-0x0000000002027000-memory.dmp
    Filesize

    32KB

  • memory/1684-92-0x0000000001FFF000-0x0000000002003000-memory.dmp
    Filesize

    16KB

  • memory/1684-122-0x000000001D310000-0x000000001D319000-memory.dmp
    Filesize

    36KB

  • memory/1684-98-0x0000000002017000-0x000000000201F000-memory.dmp
    Filesize

    32KB

  • memory/1684-96-0x000000000200B000-0x000000000200F000-memory.dmp
    Filesize

    16KB

  • memory/1692-107-0x0000000000B46000-0x0000000000B65000-memory.dmp
    Filesize

    124KB

  • memory/1692-87-0x000007FEF40A0000-0x000007FEF4AC3000-memory.dmp
    Filesize

    10.1MB

  • memory/1692-84-0x0000000000000000-mapping.dmp
  • memory/1692-91-0x000007FEF3000000-0x000007FEF4096000-memory.dmp
    Filesize

    16.6MB

  • memory/1784-75-0x0000000000A2F000-0x0000000000A33000-memory.dmp
    Filesize

    16KB

  • memory/1784-74-0x0000000000A2B000-0x0000000000A2F000-memory.dmp
    Filesize

    16KB

  • memory/1784-56-0x00000000009C6000-0x00000000009E5000-memory.dmp
    Filesize

    124KB

  • memory/1784-68-0x0000000000A1B000-0x0000000000A1F000-memory.dmp
    Filesize

    16KB

  • memory/1784-64-0x00000000009C6000-0x00000000009E5000-memory.dmp
    Filesize

    124KB

  • memory/1784-55-0x000007FEF3000000-0x000007FEF4096000-memory.dmp
    Filesize

    16.6MB

  • memory/1784-71-0x0000000000A23000-0x0000000000A27000-memory.dmp
    Filesize

    16KB

  • memory/1784-69-0x0000000000A1F000-0x0000000000A23000-memory.dmp
    Filesize

    16KB

  • memory/1784-54-0x000007FEF40A0000-0x000007FEF4AC3000-memory.dmp
    Filesize

    10.1MB

  • memory/1784-66-0x0000000000A17000-0x0000000000A1B000-memory.dmp
    Filesize

    16KB

  • memory/1784-73-0x0000000000A27000-0x0000000000A2B000-memory.dmp
    Filesize

    16KB

  • memory/1900-63-0x000007FEF40A0000-0x000007FEF4AC3000-memory.dmp
    Filesize

    10.1MB

  • memory/1900-70-0x00000000025E4000-0x00000000025E7000-memory.dmp
    Filesize

    12KB

  • memory/1900-77-0x00000000025EB000-0x000000000260A000-memory.dmp
    Filesize

    124KB

  • memory/1900-76-0x00000000025E4000-0x00000000025E7000-memory.dmp
    Filesize

    12KB

  • memory/1900-67-0x000007FEEEDB0000-0x000007FEEF90D000-memory.dmp
    Filesize

    11.4MB

  • memory/1900-59-0x000007FEFC421000-0x000007FEFC423000-memory.dmp
    Filesize

    8KB

  • memory/1900-57-0x0000000000000000-mapping.dmp
  • memory/1936-83-0x000007FEEE250000-0x000007FEEEDAD000-memory.dmp
    Filesize

    11.4MB

  • memory/1936-111-0x000000000248B000-0x00000000024AA000-memory.dmp
    Filesize

    124KB

  • memory/1936-110-0x0000000002484000-0x0000000002487000-memory.dmp
    Filesize

    12KB

  • memory/1936-89-0x000000001B730000-0x000000001BA2F000-memory.dmp
    Filesize

    3.0MB

  • memory/1936-78-0x0000000000000000-mapping.dmp
  • memory/1936-82-0x000007FEF40A0000-0x000007FEF4AC3000-memory.dmp
    Filesize

    10.1MB

  • memory/1936-95-0x0000000002484000-0x0000000002487000-memory.dmp
    Filesize

    12KB