Resubmissions

23-07-2024 16:31

240723-t1j2ysygmq 10

23-07-2024 13:14

240723-qgq5da1gqj 10

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    23-07-2024 13:14

General

  • Target

    MalwareBazaar.exe

  • Size

    1.4MB

  • MD5

    962b35661c04b5bff3e3504f9cd646a7

  • SHA1

    1a1cd695804bd14e8e1ea64a21b2b81fe76baf6c

  • SHA256

    af0b876a436452a6e998fc622493aaa4553bcc53864d66a6a6d5d476a85902eb

  • SHA512

    a7b7fb2990abc7a73e0f5963c3ce72b1b18a37fb908ec069985bde616e7e8fcd75f288855ae33218e66b1483b7f2596bf4729e3cab9afb478fc37691488964ec

  • SSDEEP

    24576:dngozf6mbIWaZWazVXOLJPqEXN9/uZteoFjqQOy:dnVD6mkWawkXmPqEXN9mZteuj5/

Malware Config

Extracted

Family

remcos

Botnet

NewRemoteHost

C2

newnex.3utilities.com:8580

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-68D53E

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Extracted

Family

nanocore

Version

1.2.2.0

C2

newsddawork.3utilities.com:1620

maxlogs.webhop.me:1620

Mutex

1fa46b72-10f9-4da3-bc15-84dde165706d

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    maxlogs.webhop.me

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2024-02-17T03:41:10.727034736Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    1620

  • default_group

    NewBin

  • 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

    1fa46b72-10f9-4da3-bc15-84dde165706d

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    newsddawork.3utilities.com

  • 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.

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Detected Nirsoft tools 3 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 5 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 13 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 61 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe
    "C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1476
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\tPbnVzkURocjXA.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2728
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\tPbnVzkURocjXA" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3237.tmp"
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2816
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
      2⤵
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2540
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe /stext "C:\Users\Admin\AppData\Local\Temp\zoiitf"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:2488
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe /stext "C:\Users\Admin\AppData\Local\Temp\jjnatxjwa"
        3⤵
        • Accesses Microsoft Outlook accounts
        PID:2476
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe /stext "C:\Users\Admin\AppData\Local\Temp\mlttmquqoafm"
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:992
      • C:\Users\Admin\AppData\Local\Temp\a.exe
        "C:\Users\Admin\AppData\Local\Temp\a.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1536
        • C:\Users\Admin\AppData\Local\Temp\a.exe
          "C:\Users\Admin\AppData\Local\Temp\a.exe"
          4⤵
          • 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:1716

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    159e3447e1b32c480d8bdc1142b62a34

    SHA1

    40b7cbae688b3bfa11ec40cff938e27be2444bc5

    SHA256

    80136dae363d9c166e9e648d479e3f5cadc2ebf29274a17f02f00dcacfcc23a9

    SHA512

    04adc24f24f1218124c02fa9a9dc6251012f30a8380607987edec5917e40cb582251d1344f5db5818436101fa7cb81d846b45a8c90a4b9c8ded4361283004b92

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    342B

    MD5

    c05f27b76dd99769bfca2154a898eb83

    SHA1

    836527d8a62e6b52b9e37a82c01da362b88e4735

    SHA256

    d47f619b25cba5fe413a02b06988862e412a3a85fb24f9dc3c1f8ece0fa5c201

    SHA512

    3ba7399aae5ac433f6852f92411710f33702758fc6edeed65b6f5e82449640441a72c92370857f00ffc4e02b3112c79f8b19de587087379ad67085405d2dc8ec

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    342B

    MD5

    223d2c88b834c786b51c44b5cd7c1713

    SHA1

    16b086fbb374d32809918c98ec767e31e0b2289a

    SHA256

    b33209ee0b8b3611afb7f7aa490f390f6afb1725c4e5e8f8cad299ac3c847b46

    SHA512

    c28cee738eea476aa2438de904e18351bb85bb4f8cbb4271995c11cbf3a52b3eedd514753e538687f712c8f0128d269ebf6a0275492e560b82c593b17f97d571

  • C:\Users\Admin\AppData\Local\Temp\Cab4846.tmp

    Filesize

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

  • C:\Users\Admin\AppData\Local\Temp\Tar4907.tmp

    Filesize

    181KB

    MD5

    4ea6026cf93ec6338144661bf1202cd1

    SHA1

    a1dec9044f750ad887935a01430bf49322fbdcb7

    SHA256

    8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

    SHA512

    6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

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

    Filesize

    623KB

    MD5

    7166bb20971fd3ea0214675b80d6dce2

    SHA1

    c6bb92b860375a05a54465b9a2b53c4210d88042

    SHA256

    b6fcf56c757a74ebf781c794d629965dc94bc256ebeb502c2a948681789d5044

    SHA512

    0b3e8569c171f1f95e3c5ad724ee02cb81c8c0af3a384058de9578930fd56dcf00e92f76818501537d91aa8d905375a8f179224ce08b4917989622901a97eb64

  • C:\Users\Admin\AppData\Local\Temp\tmp3237.tmp

    Filesize

    1KB

    MD5

    da47c95f9ef5efb7f543a732e054d200

    SHA1

    44e66676ed521e9740a9a1807035c0241d0a83f0

    SHA256

    b4f774f478ebfa7a75342b215c02cc816e085dd6e39563354457bc7a39444f6d

    SHA512

    76866ff96f4c6718de6230f792d4dcb3c32e741aa1673b47d22e6e0c737f69ed3c60499c0327dcd28c917d22b26b79158257ddcaebf91a1af84da72045143da2

  • C:\Users\Admin\AppData\Local\Temp\zoiitf

    Filesize

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

  • memory/992-156-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/992-154-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/992-155-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/992-153-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1476-5-0x0000000005730000-0x0000000005810000-memory.dmp

    Filesize

    896KB

  • memory/1476-0-0x000000007494E000-0x000000007494F000-memory.dmp

    Filesize

    4KB

  • memory/1476-36-0x0000000074940000-0x000000007502E000-memory.dmp

    Filesize

    6.9MB

  • memory/1476-4-0x0000000000530000-0x000000000053E000-memory.dmp

    Filesize

    56KB

  • memory/1476-3-0x0000000000500000-0x000000000051A000-memory.dmp

    Filesize

    104KB

  • memory/1476-2-0x0000000074940000-0x000000007502E000-memory.dmp

    Filesize

    6.9MB

  • memory/1476-1-0x0000000000A90000-0x0000000000BF2000-memory.dmp

    Filesize

    1.4MB

  • memory/1536-189-0x0000000005100000-0x000000000517A000-memory.dmp

    Filesize

    488KB

  • memory/1536-172-0x0000000000CE0000-0x0000000000D80000-memory.dmp

    Filesize

    640KB

  • memory/1536-173-0x0000000004300000-0x0000000004398000-memory.dmp

    Filesize

    608KB

  • memory/1536-174-0x0000000000580000-0x0000000000594000-memory.dmp

    Filesize

    80KB

  • memory/1536-186-0x00000000008E0000-0x00000000008EA000-memory.dmp

    Filesize

    40KB

  • memory/1536-187-0x0000000000C40000-0x0000000000C4E000-memory.dmp

    Filesize

    56KB

  • memory/1716-221-0x0000000002190000-0x00000000021A0000-memory.dmp

    Filesize

    64KB

  • memory/1716-197-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1716-195-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1716-192-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1716-193-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1716-204-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1716-207-0x00000000003F0000-0x00000000003FA000-memory.dmp

    Filesize

    40KB

  • memory/1716-208-0x0000000000630000-0x000000000064E000-memory.dmp

    Filesize

    120KB

  • memory/1716-209-0x00000000004E0000-0x00000000004EA000-memory.dmp

    Filesize

    40KB

  • memory/1716-214-0x0000000000660000-0x0000000000672000-memory.dmp

    Filesize

    72KB

  • memory/1716-215-0x0000000000670000-0x000000000068A000-memory.dmp

    Filesize

    104KB

  • memory/1716-216-0x0000000000A30000-0x0000000000A3E000-memory.dmp

    Filesize

    56KB

  • memory/1716-217-0x0000000000A50000-0x0000000000A62000-memory.dmp

    Filesize

    72KB

  • memory/1716-218-0x0000000000C30000-0x0000000000C3C000-memory.dmp

    Filesize

    48KB

  • memory/1716-219-0x0000000000CC0000-0x0000000000CCE000-memory.dmp

    Filesize

    56KB

  • memory/1716-220-0x0000000002180000-0x0000000002194000-memory.dmp

    Filesize

    80KB

  • memory/1716-222-0x00000000021A0000-0x00000000021B4000-memory.dmp

    Filesize

    80KB

  • memory/1716-223-0x00000000021B0000-0x00000000021BE000-memory.dmp

    Filesize

    56KB

  • memory/1716-224-0x0000000002210000-0x000000000223E000-memory.dmp

    Filesize

    184KB

  • memory/1716-225-0x0000000002340000-0x0000000002354000-memory.dmp

    Filesize

    80KB

  • memory/2476-150-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2476-151-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2476-157-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2488-147-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2488-148-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2488-146-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2488-152-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2540-45-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-39-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-175-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-177-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2540-181-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2540-180-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2540-182-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-184-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-185-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-48-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-47-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-43-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-159-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-44-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-42-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-41-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-40-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-158-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-38-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-37-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-31-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-32-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-35-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-15-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-23-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-25-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-27-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-29-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2540-30-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-13-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-21-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-19-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2540-17-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB