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Analysis

  • max time kernel
    139s
  • max time network
    165s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    01/10/2022, 21:00

General

  • Target

    bdada64813dbe03408c4826a9b90a5f07beca58e1036df5a1aaf179bbecb1a63.exe

  • Size

    31KB

  • MD5

    6f855b0dcaf12e609058030cedf4c030

  • SHA1

    58a5630e99669bc1b35e55dcb7ed5d104f60b905

  • SHA256

    bdada64813dbe03408c4826a9b90a5f07beca58e1036df5a1aaf179bbecb1a63

  • SHA512

    be69cee35355589582665a96a941d77ea00f35bacd2e982c35cf4d7a48b418fb1319c81a3bad341834fdb5b54280d0ee5938cba2bd4c251eee80b27fb1c70dfc

  • SSDEEP

    768:rg8q0xXJrLL/tvdUkTRQ75c0RJG7JxsLoIvCYR/9m:r7Z5HL1CkdQFc0RJpJL

Malware Config

Extracted

Family

joker

C2

http://tttie.oss-cn-shenzhen.aliyuncs.com

Signatures

  • joker

    Joker is an Android malware that targets billing and SMS fraud.

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 4 IoCs
  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Drops file in Program Files directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Kills process with taskkill 1 IoCs
  • Modifies registry class 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bdada64813dbe03408c4826a9b90a5f07beca58e1036df5a1aaf179bbecb1a63.exe
    "C:\Users\Admin\AppData\Local\Temp\bdada64813dbe03408c4826a9b90a5f07beca58e1036df5a1aaf179bbecb1a63.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:1972
    • C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\kinst_1_335.exe
      "C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\kinst_1_335.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Writes to the Master Boot Record (MBR)
      • Modifies registry class
      PID:1564
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c C:\Users\Admin\AppData\Local\Temp\bdada64813dbe03408c4826a9b90a5f07beca58e1036df5a1aaf179bbecb1a63.exe.bat
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1928
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /F /IM bdada64813dbe03408c4826a9b90a5f07beca58e1036df5a1aaf179bbecb1a63.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:1328

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\bdada64813dbe03408c4826a9b90a5f07beca58e1036df5a1aaf179bbecb1a63.exe.bat

    Filesize

    330B

    MD5

    a1ad8aaf5b3424949370911b1a684a5b

    SHA1

    d3465e4ba29682a37e9a910fc1a71acc1bc31615

    SHA256

    6bc8795bdd45eaf1de03545ebb9caea21fd3635d7f64d219fc1a965000f1d10a

    SHA512

    64bd4bedcb684f610d4af0a634fff0b54f3e2d9f982015d3a8be13f4816456af2aefbf6a59c066c739e112e3685e2a59ce1e2bd313a52796fcfd16d4a4bdb539

  • C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\kinst_1_335.exe

    Filesize

    1.1MB

    MD5

    3035693137f153ef3e1213a945d33e00

    SHA1

    175f680ed04a381663a594189750b450a1f86229

    SHA256

    646be34566c6b635f9d32fdd54ae7824255a363de2a12d084a1797c3c43ad3a1

    SHA512

    802553d8bd67880efb346ca188b5e7b17d95feafe65018b1d87d372d146c5bbf417040493c527bad1fcbe32c62b6639b00220340226c1cae1ed6640cf94f155c

  • C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\kinst_1_335.exe

    Filesize

    1.1MB

    MD5

    3035693137f153ef3e1213a945d33e00

    SHA1

    175f680ed04a381663a594189750b450a1f86229

    SHA256

    646be34566c6b635f9d32fdd54ae7824255a363de2a12d084a1797c3c43ad3a1

    SHA512

    802553d8bd67880efb346ca188b5e7b17d95feafe65018b1d87d372d146c5bbf417040493c527bad1fcbe32c62b6639b00220340226c1cae1ed6640cf94f155c

  • \Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\kinst_1_335.exe

    Filesize

    1.1MB

    MD5

    3035693137f153ef3e1213a945d33e00

    SHA1

    175f680ed04a381663a594189750b450a1f86229

    SHA256

    646be34566c6b635f9d32fdd54ae7824255a363de2a12d084a1797c3c43ad3a1

    SHA512

    802553d8bd67880efb346ca188b5e7b17d95feafe65018b1d87d372d146c5bbf417040493c527bad1fcbe32c62b6639b00220340226c1cae1ed6640cf94f155c

  • \Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\kinst_1_335.exe

    Filesize

    1.1MB

    MD5

    3035693137f153ef3e1213a945d33e00

    SHA1

    175f680ed04a381663a594189750b450a1f86229

    SHA256

    646be34566c6b635f9d32fdd54ae7824255a363de2a12d084a1797c3c43ad3a1

    SHA512

    802553d8bd67880efb346ca188b5e7b17d95feafe65018b1d87d372d146c5bbf417040493c527bad1fcbe32c62b6639b00220340226c1cae1ed6640cf94f155c

  • \Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\kinst_1_335.exe

    Filesize

    1.1MB

    MD5

    3035693137f153ef3e1213a945d33e00

    SHA1

    175f680ed04a381663a594189750b450a1f86229

    SHA256

    646be34566c6b635f9d32fdd54ae7824255a363de2a12d084a1797c3c43ad3a1

    SHA512

    802553d8bd67880efb346ca188b5e7b17d95feafe65018b1d87d372d146c5bbf417040493c527bad1fcbe32c62b6639b00220340226c1cae1ed6640cf94f155c

  • \Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\kinst_1_335.exe

    Filesize

    1.1MB

    MD5

    3035693137f153ef3e1213a945d33e00

    SHA1

    175f680ed04a381663a594189750b450a1f86229

    SHA256

    646be34566c6b635f9d32fdd54ae7824255a363de2a12d084a1797c3c43ad3a1

    SHA512

    802553d8bd67880efb346ca188b5e7b17d95feafe65018b1d87d372d146c5bbf417040493c527bad1fcbe32c62b6639b00220340226c1cae1ed6640cf94f155c

  • memory/1972-54-0x00000000751A1000-0x00000000751A3000-memory.dmp

    Filesize

    8KB

  • memory/1972-55-0x0000000000400000-0x0000000000413000-memory.dmp

    Filesize

    76KB

  • memory/1972-67-0x0000000000400000-0x0000000000413000-memory.dmp

    Filesize

    76KB

  • memory/1972-56-0x0000000000020000-0x0000000000033000-memory.dmp

    Filesize

    76KB

  • memory/1972-57-0x0000000000020000-0x0000000000033000-memory.dmp

    Filesize

    76KB