Analysis

  • max time kernel
    93s
  • max time network
    139s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/06/2024, 20:38

General

  • Target

    2024-06-08_7ea7d9e934a8ddeb8dfd377f3d0c9131_bkransomware.exe

  • Size

    96KB

  • MD5

    7ea7d9e934a8ddeb8dfd377f3d0c9131

  • SHA1

    7af17075441013a1a77773f2fc9b09bc26481793

  • SHA256

    03db67dd35edc3e7b1f8576b329dc16c573b2bab31e232cdea24d501e02f67f8

  • SHA512

    d9b91af85713a43d3adc3ce0f0c7d146062e0fba481d410fd7e785d0897033b65de5e7888aa25b95ed254911a60a310c1ce2b4c74fe8b4cf2cb98024afc826cc

  • SSDEEP

    1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT53yz18fxYNxw:ZhpAyazIlyazT53Csaw

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-08_7ea7d9e934a8ddeb8dfd377f3d0c9131_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-08_7ea7d9e934a8ddeb8dfd377f3d0c9131_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5116
    • C:\Users\Admin\AppData\Local\Temp\DqQBwMbdaE8d2HW.exe
      C:\Users\Admin\AppData\Local\Temp\DqQBwMbdaE8d2HW.exe
      2⤵
      • Executes dropped EXE
      PID:64
    • C:\Windows\CTS.exe
      "C:\Windows\CTS.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      PID:1600

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

          Filesize

          392KB

          MD5

          a13b15cf718cdea621f2a2e31256f706

          SHA1

          6062afba07d0f07d7d09ce149a181d178d8d4f2e

          SHA256

          6ecfcbc0b996503404cd0099fd29d44f7cab858b84e58fd5d2648febf1b9a889

          SHA512

          360b8582d76637826dc1665cae2982ff31ccbcd50e3fa447a8e8b074f5523b09f231a3365305acc2b5a925bf128c6788fb724c13321d6b556c79c4d5110720c4

        • C:\Users\Admin\AppData\Local\Temp\DqQBwMbdaE8d2HW.exe

          Filesize

          25KB

          MD5

          abbd49c180a2f8703f6306d6fa731fdc

          SHA1

          d63f4bfe7f74936b2fbace803e3da6103fbf6586

          SHA256

          5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

          SHA512

          290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

        • C:\Windows\CTS.exe

          Filesize

          71KB

          MD5

          66df4ffab62e674af2e75b163563fc0b

          SHA1

          dec8a197312e41eeb3cfef01cb2a443f0205cd6e

          SHA256

          075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

          SHA512

          1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

        • memory/64-9-0x0000000000400000-0x000000000040D000-memory.dmp

          Filesize

          52KB