Analysis

  • max time kernel
    148s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    27-01-2023 07:33

General

  • Target

    7034c12131cc2e28fcf9235850a36b08e9983dce.exe

  • Size

    7KB

  • MD5

    1c72fb093ace75fffb093c6541ff4940

  • SHA1

    7034c12131cc2e28fcf9235850a36b08e9983dce

  • SHA256

    f00982603a693995cf32649df28ac390ce839638751f04d11517454466061785

  • SHA512

    4d713c85e2b5a818e3f5db4c7b59a820bb309c911825670b540597c9faa9d931f5648d054e19a01a48f7c97bae6dfe67b02148fb3ad58ddafdd11bb06f8a59ed

  • SSDEEP

    96:lTlsnKYgr+QLZCMqm18WQ2juY+wq+Df/8tEkajtR/zNt:lpQELZCMqmXjuZ+z8zaj7p

Malware Config

Extracted

Family

remcos

Botnet

28282

C2

194.180.49.17:28282

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

    gqhwjekrltlu-TOU33Q

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Detect PureCrypter injector 1 IoCs
  • PureCrypter

    PureCrypter is a .NET malware loader first seen in early 2021.

  • Remcos

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

  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 4 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7034c12131cc2e28fcf9235850a36b08e9983dce.exe
    "C:\Users\Admin\AppData\Local\Temp\7034c12131cc2e28fcf9235850a36b08e9983dce.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1704
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1432
    • C:\Users\Admin\AppData\Local\Temp\7034c12131cc2e28fcf9235850a36b08e9983dce.exe
      C:\Users\Admin\AppData\Local\Temp\7034c12131cc2e28fcf9235850a36b08e9983dce.exe
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:2044
      • C:\Users\Admin\AppData\Local\Temp\7034c12131cc2e28fcf9235850a36b08e9983dce.exe
        C:\Users\Admin\AppData\Local\Temp\7034c12131cc2e28fcf9235850a36b08e9983dce.exe /stext "C:\Users\Admin\AppData\Local\Temp\sxltmgbavxlmnnnmvahrglvimxj"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:1816
      • C:\Users\Admin\AppData\Local\Temp\7034c12131cc2e28fcf9235850a36b08e9983dce.exe
        C:\Users\Admin\AppData\Local\Temp\7034c12131cc2e28fcf9235850a36b08e9983dce.exe /stext "C:\Users\Admin\AppData\Local\Temp\czyenzmcjfdzptjqelutqyqrveakwz"
        3⤵
        • Accesses Microsoft Outlook accounts
        PID:1164
      • C:\Users\Admin\AppData\Local\Temp\7034c12131cc2e28fcf9235850a36b08e9983dce.exe
        C:\Users\Admin\AppData\Local\Temp\7034c12131cc2e28fcf9235850a36b08e9983dce.exe /stext "C:\Users\Admin\AppData\Local\Temp\fteworxwxovdzzxcvwgutccieskspksnb"
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1364

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\sxltmgbavxlmnnnmvahrglvimxj
    Filesize

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

  • memory/1164-90-0x0000000000400000-0x0000000000457000-memory.dmp
    Filesize

    348KB

  • memory/1164-82-0x0000000000455238-mapping.dmp
  • memory/1164-91-0x0000000000400000-0x0000000000457000-memory.dmp
    Filesize

    348KB

  • memory/1364-83-0x0000000000422206-mapping.dmp
  • memory/1364-87-0x0000000000400000-0x0000000000424000-memory.dmp
    Filesize

    144KB

  • memory/1432-57-0x0000000000000000-mapping.dmp
  • memory/1432-59-0x000000006F860000-0x000000006FE0B000-memory.dmp
    Filesize

    5.7MB

  • memory/1432-60-0x000000006F860000-0x000000006FE0B000-memory.dmp
    Filesize

    5.7MB

  • memory/1432-61-0x000000006F860000-0x000000006FE0B000-memory.dmp
    Filesize

    5.7MB

  • memory/1704-54-0x0000000000B70000-0x0000000000B78000-memory.dmp
    Filesize

    32KB

  • memory/1704-62-0x0000000005380000-0x0000000005400000-memory.dmp
    Filesize

    512KB

  • memory/1704-56-0x0000000006130000-0x00000000063CC000-memory.dmp
    Filesize

    2.6MB

  • memory/1704-55-0x00000000762B1000-0x00000000762B3000-memory.dmp
    Filesize

    8KB

  • memory/1816-81-0x0000000000476274-mapping.dmp
  • memory/1816-88-0x0000000000400000-0x0000000000478000-memory.dmp
    Filesize

    480KB

  • memory/2044-63-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/2044-68-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/2044-79-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/2044-80-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/2044-75-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/2044-76-0x0000000000432C26-mapping.dmp
  • memory/2044-69-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/2044-71-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/2044-70-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/2044-73-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/2044-66-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/2044-64-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/2044-92-0x0000000010000000-0x0000000010019000-memory.dmp
    Filesize

    100KB

  • memory/2044-96-0x0000000010000000-0x0000000010019000-memory.dmp
    Filesize

    100KB

  • memory/2044-95-0x0000000010000000-0x0000000010019000-memory.dmp
    Filesize

    100KB

  • memory/2044-97-0x0000000010000000-0x0000000010019000-memory.dmp
    Filesize

    100KB

  • memory/2044-98-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB