Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    21-05-2024 16:05

General

  • Target

    2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exe

  • Size

    96KB

  • MD5

    ef846a72a62332fdedb7fec0375b6d7b

  • SHA1

    1926eb7099c6bbdc50c03c97f1e71642ecc809bf

  • SHA256

    631b34d8ed91665e29597ee1d80ea29fd713a8d92c809ce29826bce969aa8027

  • SHA512

    936576e43959f1067575bf5cf458bcc70ad376dcb7550a49be7f26f75871bafda1d6018bd76a5b6d4bfdbd5529da7a3481d1ea5e93ea9bf1e9650bfe56135168

  • SSDEEP

    1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTK3Qdu++54H0wg2:ZhpAyazIlyazTKghLHhg2

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 3 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 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2556
    • C:\Users\Admin\AppData\Local\Temp\lPtfB6DvZHGBChr.exe
      C:\Users\Admin\AppData\Local\Temp\lPtfB6DvZHGBChr.exe
      2⤵
      • Executes dropped EXE
      PID:2656
    • 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:3068

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\lPtfB6DvZHGBChr.exe

    Filesize

    96KB

    MD5

    46f5fd94f1ec2a81e05e94c43ca97759

    SHA1

    ea770b26b9bac677b587597d2785e50f5334d26a

    SHA256

    ac5e7c1e13afffc83ade6c139da8b237870f64fba213eb2f6fd12de886470c35

    SHA512

    a0a642f0aa787bba65f73ee6d192e08432ee5581552dc4243e1d0a948dc69a413adcd7a1aa0aa24635357cdc002565b876a1a941568242ded5747ad7538670e3

  • C:\Users\Admin\AppData\Local\Temp\lPtfB6DvZHGBChr.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/2656-15-0x0000000000400000-0x000000000040D000-memory.dmp

    Filesize

    52KB