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Analysis

  • max time kernel
    133s
  • max time network
    102s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/05/2024, 17:53

General

  • Target

    2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe

  • Size

    7.3MB

  • MD5

    46a27c782b09f4a602730e8b1cad3627

  • SHA1

    10b7660cccc7e4a3fe105fb9b1cad49732834a0b

  • SHA256

    14791264a3918650fcb150c11e59e308dc1131eb08cbbdfcfcca49ac5657a646

  • SHA512

    6502834a98d045c548e43cc30c78e4375e0aeaddd47706f172ddea4e06c6757e204500e7f992863e62036df55cb27f3427e5d66e30d7e19ce275506c7bce931a

  • SSDEEP

    196608:onG45fkN4b7cqKg4LK8VJFgDx8vfFe9WI+eAMrk1h:t4RkN4bAqtGtFYx6fU9WNe1g1h

Malware Config

Signatures

  • Detects executables containing URLs to raw contents of a Github gist 2 IoCs
  • 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 3 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2768
    • C:\Users\Admin\AppData\Local\Temp\22hwOfQQpJqgtkg.exe
      C:\Users\Admin\AppData\Local\Temp\22hwOfQQpJqgtkg.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:4772
    • 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:536

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

    69e900d8c41387dfa346ab8527d2a3f9

    SHA1

    7904cfd14d662147adb4841deea4a43b70e2b140

    SHA256

    04a51bdf2c9d9287d7c7737fea34f8ff80018e448c89167b1057924e1c3243ea

    SHA512

    873894e55af8897cba3168be2d4afc53292fed8c0d29d266409a9f74e66ee592f63589ab67bee7e464fd7d3c58f5d0858e3495c52ade6a9609e7aa21822c74c8

  • C:\Users\Admin\AppData\Local\Temp\22hwOfQQpJqgtkg.exe

    Filesize

    7.3MB

    MD5

    dd6b75a77601d62ac66df1b0a51a7de3

    SHA1

    699fc35deccb0cd6e341420903fc993535c2c98f

    SHA256

    2f46a1d48e1589e0aa10f215e77cb48fb90c531e19aa3c05d766f59b449f3c15

    SHA512

    43bd57e5379c22494aade734a45a443722327d48c7f06aa521048c99adba576e29bd70bba7bd28ba94f8f24f88efed7b8e5a1b3249cbfcb4d95fd0bc1f424d86

  • C:\Users\Admin\AppData\Local\Temp\config\chocolatey.config.4772.update

    Filesize

    9KB

    MD5

    14ffcf07375b3952bd3f2fe52bb63c14

    SHA1

    ab2eadde4c614eb8f1f2cae09d989c5746796166

    SHA256

    6ccfdb5979e715d12e597b47e1d56db94cf6d3a105b94c6e5f4dd8bab28ef5ed

    SHA512

    14a32151f7f7c45971b4c1adfb61f6af5136b1db93b50d00c6e1e3171e25b19749817b4e916d023ee1822caee64961911103087ca516cf6a0eafce1d17641fc4

  • C:\Users\Admin\AppData\Local\Temp\config\chocolatey.config.backup

    Filesize

    809B

    MD5

    8b6737800745d3b99886d013b3392ac3

    SHA1

    bb94da3f294922d9e8d31879f2d145586a182e19

    SHA256

    86f10504ca147d13a157944f926141fe164a89fa8a71847458bda7102abb6594

    SHA512

    654dda9b645b4900ac6e5bb226494921194dab7de71d75806f645d9b94ed820055914073ef9a5407e468089c0b2ee4d021f03c2ea61e73889b553895e79713df

  • C:\Users\Admin\AppData\Local\Temp\logs\chocolatey.log

    Filesize

    805B

    MD5

    e3d6201ac9da655f64f90b9e52f33289

    SHA1

    6f4b83e3f6eda4051a3d3c9b08cfaadd3352bb90

    SHA256

    e99eac83e31323f9b1a6208ead6fcb0ed41b748d378db53321fe5ee5c8697980

    SHA512

    cd319b45eb1a189709f51c535fed25fa517b01d2fe504e581365bc05dfb8fb52edc3c659d9919438dacbcf0507ea686405c45c5a5444933628e7317b336c7c1f

  • C:\Users\Admin\AppData\Local\Temp\logs\chocolatey.log

    Filesize

    2KB

    MD5

    74adaf1a2b64448b8ecb649d22455db3

    SHA1

    6da8fe8a469526c47391289d513fea86dfee3d4f

    SHA256

    06e2a29b6a5c1d8467c3e2df308f4792d639ab3d4abfc6d4242100a0ed9d963a

    SHA512

    abd9c091fd32ec7f928b82e8bc2caef0972d737134509f9c9cadbfc268fdf6e06925ac01e26f2d39ac77571034ac25fe1e15a4c67c51420147cbe2b147e2c520

  • C:\Users\Admin\AppData\Local\Temp\logs\chocolatey.log

    Filesize

    4KB

    MD5

    a71c264f75e4a470eef28d8d562ebd4b

    SHA1

    fc71dfaaecfb20afeabb9ae170b4334d07696350

    SHA256

    9cd497910e7133139ef889fb65e977b1935a65181044e13430277b47d878b613

    SHA512

    8b21a1dcea9fb3a1571da3cea15aed311670c4f919a0b28c4145b79f742122bc3177b382f1d6c5e78424e209f50a870ed657c098cfd9368d6f01e7790dff7c3a

  • C:\Users\Admin\AppData\Local\Temp\redirects\cpush.exe.ignore

    Filesize

    2B

    MD5

    81051bcc2cf1bedf378224b0a93e2877

    SHA1

    ba8ab5a0280b953aa97435ff8946cbcbb2755a27

    SHA256

    7eb70257593da06f682a3ddda54a9d260d4fc514f645237f5ca74b08f8da61a6

    SHA512

    1b302a2f1e624a5fb5ad94ddc4e5f8bfd74d26fa37512d0e5face303d8c40eee0d0ffa3649f5da43f439914d128166cb6c4774a7caa3b174d7535451eb697b5d

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    66df4ffab62e674af2e75b163563fc0b

    SHA1

    dec8a197312e41eeb3cfef01cb2a443f0205cd6e

    SHA256

    075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

    SHA512

    1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

  • memory/4772-27-0x00007FFC09930000-0x00007FFC0A3F1000-memory.dmp

    Filesize

    10.8MB

  • memory/4772-34-0x0000000001CD0000-0x0000000001CF0000-memory.dmp

    Filesize

    128KB

  • memory/4772-17-0x0000000000DB0000-0x00000000014F6000-memory.dmp

    Filesize

    7.3MB

  • memory/4772-61-0x00000000035E0000-0x0000000003630000-memory.dmp

    Filesize

    320KB

  • memory/4772-62-0x000000001E350000-0x000000001E3C6000-memory.dmp

    Filesize

    472KB

  • memory/4772-63-0x0000000003550000-0x000000000356E000-memory.dmp

    Filesize

    120KB

  • memory/4772-13-0x00007FFC09933000-0x00007FFC09935000-memory.dmp

    Filesize

    8KB

  • memory/4772-168-0x00007FFC09930000-0x00007FFC0A3F1000-memory.dmp

    Filesize

    10.8MB