Resubmissions

27/03/2022, 07:19

220327-h52a9abaen 8

22/03/2022, 12:16

220322-pfgnwafae5 8

Analysis

  • max time kernel
    74s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    22/03/2022, 12:16

General

  • Target

    cpcrs.exe

  • Size

    419KB

  • MD5

    7d20fa01a703afa8907e50417d27b0a4

  • SHA1

    320116162d78afb8e00fd972591479a899d3dfee

  • SHA256

    3b2e708eaa4744c76a633391cf2c983f4a098b46436525619e5ea44e105355fe

  • SHA512

    0dcebe2598e6ccb51f0609831c93071421049eb924f83871e95c5a280af0d2e76630dfc47c5a2780eb18d55ee9690d6c83aabd8f1043cc2cdc21d9fe5425b892

Malware Config

Signatures

  • Drops file in Drivers directory 64 IoCs
  • Modifies Installed Components in the registry 2 TTPs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Drops desktop.ini file(s) 64 IoCs
  • Maps connected drives based on registry 3 TTPs 4 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Drops file in Windows directory 64 IoCs
  • Program crash 3 IoCs
  • Checks SCSI registry key(s) 3 TTPs 31 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies Control Panel 60 IoCs
  • Modifies Internet Explorer settings 1 TTPs 64 IoCs
  • Modifies data under HKEY_USERS 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cpcrs.exe
    "C:\Users\Admin\AppData\Local\Temp\cpcrs.exe"
    1⤵
    • Drops file in Drivers directory
    • Drops desktop.ini file(s)
    • Maps connected drives based on registry
    • Drops file in Windows directory
    • Checks SCSI registry key(s)
    • Modifies Control Panel
    • Modifies Internet Explorer settings
    • Modifies data under HKEY_USERS
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:1584
  • C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe -pss -s 412 -p 4624 -ip 4624
    1⤵
      PID:1856
    • C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 4624 -s 1868
      1⤵
      • Program crash
      PID:3016
    • C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -pss -s 536 -p 3396 -ip 3396
      1⤵
        PID:1888
      • C:\Windows\system32\WerFault.exe
        C:\Windows\system32\WerFault.exe -u -p 3396 -s 3036
        1⤵
        • Program crash
        PID:2468
        • C:\Windows\system32\WerFault.exe
          C:\Windows\system32\WerFault.exe -u -p 2468 -s 544
          2⤵
          • Program crash
          PID:2632
      • C:\Windows\system32\WerFault.exe
        C:\Windows\system32\WerFault.exe -pss -s 520 -p 2468 -ip 2468
        1⤵
          PID:4004
        • C:\Windows\system32\WerFault.exe
          C:\Windows\system32\WerFault.exe -pss -s 580 -p 2632 -ip 2632
          1⤵
            PID:4520

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • memory/1584-130-0x0000000000070000-0x00000000000DE000-memory.dmp

            Filesize

            440KB

          • memory/1584-131-0x00007FF936F60000-0x00007FF937A21000-memory.dmp

            Filesize

            10.8MB

          • memory/1584-132-0x0000000000890000-0x0000000000892000-memory.dmp

            Filesize

            8KB

          • memory/1584-133-0x00000000022C0000-0x0000000002336000-memory.dmp

            Filesize

            472KB