Analysis

  • max time kernel
    150s
  • max time network
    128s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    03-02-2023 14:09

General

  • Target

    PURCHASE ORDER_16096.exe

  • Size

    7KB

  • MD5

    b359f4af5c88b1e237db9738415b7682

  • SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

  • SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

  • SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • SSDEEP

    96:xtEsKVeCVIP7bLp8LAn5c8aY1ej/kKV+J2qzNt:xUVVIP7bLrEOejcKYx

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

194.180.49.17:28282

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    rdfghfgjkgoighjc.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-PC1DJ2

  • 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 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 5 IoCs
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 1 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 10 IoCs
  • Suspicious use of SetThreadContext 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 53 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PURCHASE ORDER_16096.exe
    "C:\Users\Admin\AppData\Local\Temp\PURCHASE ORDER_16096.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:840
    • 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:1176
    • C:\Users\Admin\AppData\Local\Temp\PURCHASE ORDER_16096.exe
      "C:\Users\Admin\AppData\Local\Temp\PURCHASE ORDER_16096.exe"
      2⤵
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:904
      • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
        "C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe"
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1056
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:924
        • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
          C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:892
          • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
            C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe /stext "C:\Users\Admin\AppData\Local\Temp\owatmlklltzmzlxjyxvobsfkuzuzemrpp"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            PID:1652
          • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
            C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe /stext "C:\Users\Admin\AppData\Local\Temp\zyfdn"
            5⤵
            • Executes dropped EXE
            • Accesses Microsoft Outlook accounts
            PID:1472
          • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
            C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe /stext "C:\Users\Admin\AppData\Local\Temp\jsswfwfh"
            5⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            PID:368

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:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

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

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
    Filesize

    7KB

    MD5

    9a40b46c209d359b515cbd266027593d

    SHA1

    bd7f9d49be12a2d595ecf9b9e908559c16a4d466

    SHA256

    e502b12f31a3c4d9f89d6ac7ddec3fde942adee35fdf19c8dbb0bff93b51bc08

    SHA512

    57d5eb4600b9dcfb51bf1bbef1b93057af8228c27a6654fc583bea1d591b734d5ab80230b85d99350b6b41661c354476bca39672f16abcf4d7506281e8b6c39c

  • C:\Users\Admin\AppData\Roaming\Zwpfblvosjv\Phecxlkxbf.exe
    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • \ProgramData\Remcos\rdfghfgjkgoighjc.exe
    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • memory/368-122-0x0000000000400000-0x0000000000424000-memory.dmp
    Filesize

    144KB

  • memory/368-118-0x0000000000422206-mapping.dmp
  • memory/840-62-0x0000000004F20000-0x0000000004FA0000-memory.dmp
    Filesize

    512KB

  • memory/840-54-0x0000000000E00000-0x0000000000E08000-memory.dmp
    Filesize

    32KB

  • memory/840-56-0x00000000074F0000-0x000000000778E000-memory.dmp
    Filesize

    2.6MB

  • memory/840-55-0x0000000075091000-0x0000000075093000-memory.dmp
    Filesize

    8KB

  • memory/892-131-0x0000000010000000-0x0000000010019000-memory.dmp
    Filesize

    100KB

  • memory/892-111-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/892-107-0x0000000000432E48-mapping.dmp
  • memory/892-112-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/892-128-0x0000000010000000-0x0000000010019000-memory.dmp
    Filesize

    100KB

  • memory/892-132-0x0000000010000000-0x0000000010019000-memory.dmp
    Filesize

    100KB

  • memory/892-133-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/904-69-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/904-75-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/904-68-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/904-83-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/904-70-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/904-71-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/904-64-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/904-63-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/904-79-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/904-76-0x0000000000432E48-mapping.dmp
  • memory/904-66-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/904-73-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/924-92-0x000000006F2D0000-0x000000006F87B000-memory.dmp
    Filesize

    5.7MB

  • memory/924-91-0x000000006F2D0000-0x000000006F87B000-memory.dmp
    Filesize

    5.7MB

  • memory/924-90-0x000000006F2D0000-0x000000006F87B000-memory.dmp
    Filesize

    5.7MB

  • memory/924-87-0x0000000000000000-mapping.dmp
  • memory/1056-81-0x0000000000000000-mapping.dmp
  • memory/1056-85-0x00000000000A0000-0x00000000000A8000-memory.dmp
    Filesize

    32KB

  • memory/1176-61-0x000000006F300000-0x000000006F8AB000-memory.dmp
    Filesize

    5.7MB

  • memory/1176-60-0x000000006F300000-0x000000006F8AB000-memory.dmp
    Filesize

    5.7MB

  • memory/1176-59-0x000000006F300000-0x000000006F8AB000-memory.dmp
    Filesize

    5.7MB

  • memory/1176-57-0x0000000000000000-mapping.dmp
  • memory/1472-115-0x0000000000455238-mapping.dmp
  • memory/1472-124-0x0000000000400000-0x0000000000457000-memory.dmp
    Filesize

    348KB

  • memory/1472-127-0x0000000000400000-0x0000000000457000-memory.dmp
    Filesize

    348KB

  • memory/1652-113-0x0000000000476274-mapping.dmp
  • memory/1652-123-0x0000000000400000-0x0000000000478000-memory.dmp
    Filesize

    480KB

  • memory/1652-125-0x0000000000400000-0x0000000000478000-memory.dmp
    Filesize

    480KB