Analysis

  • max time kernel
    93s
  • max time network
    99s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240611-en
  • resource tags

    arch:x64arch:x86image:win11-20240611-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    14-06-2024 04:47

General

  • Target

    99fce21d1aa81f7f3b8fae707aabd43b5b51b9da0fbb7258b68bd5fe9d62073a.exe

  • Size

    6KB

  • MD5

    1c56623199e1959f271a191d603360bf

  • SHA1

    9a7429e8b08ef843739c7739e8a314006c20b2af

  • SHA256

    99fce21d1aa81f7f3b8fae707aabd43b5b51b9da0fbb7258b68bd5fe9d62073a

  • SHA512

    87c50fb8f13d5b0ce5d83d99e64a7728e466e33118faea4c52136dd8a2f70d5f4217c90f4cc3c415628b9f96b7ed114cedb2455e3edc1cc39e67a36b79fceee4

  • SSDEEP

    96:QhN/c/kk91xUL9678Ms0wFFpBV4Xh4yvn1j4r/8iT85fTc70zNt:QhN/cx1o96hwFH4R4viRM+

Malware Config

Extracted

Family

purecrypter

C2

http://103.195.103.33/nf/Qtdxulkcon.wav

Signatures

  • PureCrypter

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

  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 35 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\99fce21d1aa81f7f3b8fae707aabd43b5b51b9da0fbb7258b68bd5fe9d62073a.exe
    "C:\Users\Admin\AppData\Local\Temp\99fce21d1aa81f7f3b8fae707aabd43b5b51b9da0fbb7258b68bd5fe9d62073a.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5104
    • C:\Users\Admin\AppData\Local\Temp\99fce21d1aa81f7f3b8fae707aabd43b5b51b9da0fbb7258b68bd5fe9d62073a.exe
      "C:\Users\Admin\AppData\Local\Temp\99fce21d1aa81f7f3b8fae707aabd43b5b51b9da0fbb7258b68bd5fe9d62073a.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:3032

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\99fce21d1aa81f7f3b8fae707aabd43b5b51b9da0fbb7258b68bd5fe9d62073a.exe.log

    Filesize

    1KB

    MD5

    93744014fa06ad3ba4f2433690038bcd

    SHA1

    f1147da71dae163b0fe9e15e3e545efd2ec5321e

    SHA256

    fb7f07a6e881955e29df052aaf57b3b66732f71c8d7cf7ff9ce2d64d442bd519

    SHA512

    4f750617ff36f2806c50ebcfcfb19ee648fd11ebd5ed86ca44f594749492962beb74df22724c44665e56e11610cb0adfedb924e5bf43f6eec6001550a532fb15

  • C:\Users\Admin\AppData\Local\Temp\Cfgay.tmpdb

    Filesize

    116KB

    MD5

    4e2922249bf476fb3067795f2fa5e794

    SHA1

    d2db6b2759d9e650ae031eb62247d457ccaa57d2

    SHA256

    c2c17166e7468877d1e80822f8a5f35a7700ac0b68f3b369a1f4154ae4f811e1

    SHA512

    8e5e12daf11f9f6e73fb30f563c8f2a64bbc7bb9deffe4969e23081ec1c4073cdf6c74e8dbcc65a271142083ad8312ec7d59505c90e718a5228d369f4240e1da

  • C:\Users\Admin\AppData\Local\Temp\Fwxyyvgulkx.tmpdb

    Filesize

    152KB

    MD5

    73bd1e15afb04648c24593e8ba13e983

    SHA1

    4dd85ca46fcdf9d93f6b324f8bb0b5bb512a1b91

    SHA256

    aab0b201f392fef9fdff09e56a9d0ac33d0f68be95da270e6dab89bb1f971d8b

    SHA512

    6eb58fb41691894045569085bd64a83acd62277575ab002cf73d729bda4b6d43c36643a5fa336342e87a493326337ed43b8e5eaeae32f53210714699cb8dfac7

  • memory/3032-7247-0x00000000069C0000-0x0000000006A3A000-memory.dmp

    Filesize

    488KB

  • memory/3032-7302-0x0000000075040000-0x00000000757F1000-memory.dmp

    Filesize

    7.7MB

  • memory/3032-7259-0x0000000006920000-0x0000000006970000-memory.dmp

    Filesize

    320KB

  • memory/3032-7303-0x0000000075040000-0x00000000757F1000-memory.dmp

    Filesize

    7.7MB

  • memory/3032-7246-0x00000000061F0000-0x0000000006256000-memory.dmp

    Filesize

    408KB

  • memory/3032-7245-0x0000000006130000-0x000000000615C000-memory.dmp

    Filesize

    176KB

  • memory/3032-7244-0x0000000005A60000-0x0000000005AFE000-memory.dmp

    Filesize

    632KB

  • memory/3032-4904-0x0000000075040000-0x00000000757F1000-memory.dmp

    Filesize

    7.7MB

  • memory/3032-4953-0x0000000075040000-0x00000000757F1000-memory.dmp

    Filesize

    7.7MB

  • memory/3032-4905-0x0000000005790000-0x00000000058A6000-memory.dmp

    Filesize

    1.1MB

  • memory/3032-4903-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB

  • memory/5104-6-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-57-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-33-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-31-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-47-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-37-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-29-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-27-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-23-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-21-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-17-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-15-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-13-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-11-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-9-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-25-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-0-0x000000007504E000-0x000000007504F000-memory.dmp

    Filesize

    4KB

  • memory/5104-69-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-67-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-65-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-63-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-61-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-59-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-35-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-55-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-3690-0x000000007504E000-0x000000007504F000-memory.dmp

    Filesize

    4KB

  • memory/5104-4248-0x0000000075040000-0x00000000757F1000-memory.dmp

    Filesize

    7.7MB

  • memory/5104-4894-0x0000000075040000-0x00000000757F1000-memory.dmp

    Filesize

    7.7MB

  • memory/5104-4895-0x0000000005E40000-0x0000000005F68000-memory.dmp

    Filesize

    1.2MB

  • memory/5104-4896-0x00000000011A0000-0x00000000011EC000-memory.dmp

    Filesize

    304KB

  • memory/5104-4897-0x0000000075040000-0x00000000757F1000-memory.dmp

    Filesize

    7.7MB

  • memory/5104-4898-0x00000000011F0000-0x0000000001244000-memory.dmp

    Filesize

    336KB

  • memory/5104-39-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-41-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-4906-0x0000000075040000-0x00000000757F1000-memory.dmp

    Filesize

    7.7MB

  • memory/5104-43-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-45-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-49-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-53-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-51-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-19-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-7-0x0000000008990000-0x0000000008C76000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-5-0x0000000008E20000-0x0000000008EB2000-memory.dmp

    Filesize

    584KB

  • memory/5104-4-0x0000000009230000-0x00000000097D6000-memory.dmp

    Filesize

    5.6MB

  • memory/5104-3-0x0000000008990000-0x0000000008C7C000-memory.dmp

    Filesize

    2.9MB

  • memory/5104-2-0x0000000075040000-0x00000000757F1000-memory.dmp

    Filesize

    7.7MB

  • memory/5104-1-0x00000000008E0000-0x00000000008E8000-memory.dmp

    Filesize

    32KB