Analysis

  • max time kernel
    109s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15-06-2024 01:54

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 42 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:684
    • 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:3400

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

    f3eb81974dc5933681e933f07209ff5f

    SHA1

    7af8cae0f1d03e82daaf784df9886705685baac7

    SHA256

    e82069884dd428bd6a1c67fe00c5fa56f9c4d62b538b694694a699588f1f4ab2

    SHA512

    d9aa3871dffb76c8a73a7940fa03bbc9b65cf575cbd07f7c1fbf490cb0f3d670415eaef0bf79e34689f61ab3cdfbb104efdef004becc12e54b501f02f948aaff

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

    Filesize

    124KB

    MD5

    9618e15b04a4ddb39ed6c496575f6f95

    SHA1

    1c28f8750e5555776b3c80b187c5d15a443a7412

    SHA256

    a4cd72e529e60b5f74c50e4e5b159efaf80625f23534dd15a28203760b8b28ab

    SHA512

    f802582aa7510f6b950e3343b0560ffa9037c6d22373a6a33513637ab0f8e60ed23294a13ad8890935b02c64830b5232ba9f60d0c0fe90df02b5da30ecd7fa26

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

    Filesize

    152KB

    MD5

    73bd1e15afb04648c24593e8ba13e983

    SHA1

    4dd85ca46fcdf9d93f6b324f8bb0b5bb512a1b91

    SHA256

    aab0b201f392fef9fdff09e56a9d0ac33d0f68be95da270e6dab89bb1f971d8b

    SHA512

    6eb58fb41691894045569085bd64a83acd62277575ab002cf73d729bda4b6d43c36643a5fa336342e87a493326337ed43b8e5eaeae32f53210714699cb8dfac7

  • memory/684-0-0x00000000745BE000-0x00000000745BF000-memory.dmp

    Filesize

    4KB

  • memory/684-1-0x0000000000950000-0x0000000000958000-memory.dmp

    Filesize

    32KB

  • memory/684-2-0x00000000745B0000-0x0000000074D60000-memory.dmp

    Filesize

    7.7MB

  • memory/684-3-0x00000000087E0000-0x0000000008ACC000-memory.dmp

    Filesize

    2.9MB

  • memory/684-4-0x0000000009080000-0x0000000009624000-memory.dmp

    Filesize

    5.6MB

  • memory/684-5-0x0000000008B70000-0x0000000008C02000-memory.dmp

    Filesize

    584KB

  • memory/684-15-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-17-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-23-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-41-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-39-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-37-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-35-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-33-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-31-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-29-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-27-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-25-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-21-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-13-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-9-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-7-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-19-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-11-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-6-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-43-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-47-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-61-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-69-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-67-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-65-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-63-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-57-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-55-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-53-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-51-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-49-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-45-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-59-0x00000000087E0000-0x0000000008AC6000-memory.dmp

    Filesize

    2.9MB

  • memory/684-4892-0x00000000745B0000-0x0000000074D60000-memory.dmp

    Filesize

    7.7MB

  • memory/684-4894-0x0000000005BC0000-0x0000000005C0C000-memory.dmp

    Filesize

    304KB

  • memory/684-4893-0x0000000005F70000-0x0000000006098000-memory.dmp

    Filesize

    1.2MB

  • memory/684-4895-0x00000000745BE000-0x00000000745BF000-memory.dmp

    Filesize

    4KB

  • memory/684-4896-0x00000000745B0000-0x0000000074D60000-memory.dmp

    Filesize

    7.7MB

  • memory/684-4897-0x0000000000EF0000-0x0000000000F44000-memory.dmp

    Filesize

    336KB

  • memory/684-4903-0x00000000745B0000-0x0000000074D60000-memory.dmp

    Filesize

    7.7MB

  • memory/3400-4902-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB

  • memory/3400-4904-0x00000000745B0000-0x0000000074D60000-memory.dmp

    Filesize

    7.7MB

  • memory/3400-4905-0x00000000054A0000-0x00000000055B6000-memory.dmp

    Filesize

    1.1MB

  • memory/3400-7242-0x00000000056D0000-0x000000000576E000-memory.dmp

    Filesize

    632KB

  • memory/3400-7243-0x0000000005D90000-0x0000000005DBC000-memory.dmp

    Filesize

    176KB

  • memory/3400-7244-0x0000000005E30000-0x0000000005E96000-memory.dmp

    Filesize

    408KB

  • memory/3400-7245-0x00000000066E0000-0x000000000675A000-memory.dmp

    Filesize

    488KB

  • memory/3400-7257-0x0000000006690000-0x00000000066E0000-memory.dmp

    Filesize

    320KB

  • memory/3400-7300-0x00000000745B0000-0x0000000074D60000-memory.dmp

    Filesize

    7.7MB