Analysis

  • max time kernel
    140s
  • max time network
    135s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15-06-2024 03:34

General

  • Target

    eecbe0ee158252e585f11e95a43462649a90440717091cecc2d8b4e030ce6446.exe

  • Size

    264KB

  • MD5

    b07f706f25b6c1d3f9a62e3dd285f7c7

  • SHA1

    86a683855feb8ef56ae0060c10eef3cdbed4c4dc

  • SHA256

    eecbe0ee158252e585f11e95a43462649a90440717091cecc2d8b4e030ce6446

  • SHA512

    0f82fa6f36b770e4f0b79d2cffd2ba25be34037308650b503bc099979e07241da05ca07888e264120700fa7bef9b5746ebab247d99da13f5138e3285885f6ea2

  • SSDEEP

    6144:uf4/sJYWEbhtwaBV5ZFDQH7i6aEaS/vsd9YoeVjs:uf4QlGD3BV5ZFDfSRsd9YRBs

Malware Config

Signatures

  • Detects executables containing base64 encoded User Agent 2 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 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 1 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • 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 4 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\eecbe0ee158252e585f11e95a43462649a90440717091cecc2d8b4e030ce6446.exe
    "C:\Users\Admin\AppData\Local\Temp\eecbe0ee158252e585f11e95a43462649a90440717091cecc2d8b4e030ce6446.exe"
    1⤵
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4128
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\pylzd.exe "C:\Users\Admin\AppData\Local\Temp\eecbe0ee158252e585f11e95a43462649a90440717091cecc2d8b4e030ce6446.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3044
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 2
        3⤵
        • Runs ping.exe
        PID:1664
      • C:\Users\Admin\AppData\Local\Temp\pylzd.exe
        C:\Users\Admin\AppData\Local\Temp\\pylzd.exe "C:\Users\Admin\AppData\Local\Temp\eecbe0ee158252e585f11e95a43462649a90440717091cecc2d8b4e030ce6446.exe"
        3⤵
        • Deletes itself
        • Executes dropped EXE
        • Drops file in Program Files directory
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4796
        • \??\c:\Program Files\zrrkb\bykksnqp.exe
          "c:\Program Files\zrrkb\bykksnqp.exe" "c:\Program Files\zrrkb\bykksnqp.dll",Cache C:\Users\Admin\AppData\Local\Temp\pylzd.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Adds Run key to start application
          • Enumerates connected drives
          • Writes to the Master Boot Record (MBR)
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3052

Network

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Modify Registry

1
T1112

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

2
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

2
T1082

Remote System Discovery

1
T1018

Collection

Data from Local System

1
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Program Files\zrrkb\bykksnqp.exe
    Filesize

    60KB

    MD5

    889b99c52a60dd49227c5e485a016679

    SHA1

    8fa889e456aa646a4d0a4349977430ce5fa5e2d7

    SHA256

    6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910

    SHA512

    08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641

  • C:\Users\Admin\AppData\Local\Temp\pylzd.exe
    Filesize

    264KB

    MD5

    e235de10ee0e1064948a14803a51e772

    SHA1

    71ff6a28492854a33c5f9b8755d01e6a4e7a7117

    SHA256

    2399d86ab0e9708d38b28571c609616235e27dbc59d205467bf5ee48abe14e2f

    SHA512

    264d7a54138ca7c71d85ed64531f0566496454c55a470f7f65ff6f52bd7d44ac8f8da7d18e5fe6d73d0c259182bc02d4d2b5964c8fcf812a961ad364e17e1d13

  • \??\c:\Program Files\zrrkb\bykksnqp.dll
    Filesize

    188KB

    MD5

    721b43c9cec5114c7dc3bb7c3961638a

    SHA1

    66460771e6876e6a9aee546682e2c30a3881f15c

    SHA256

    858bc90f161a3bdf8b38613c369a2c2e7252d4f9b9ae0528e5ab3350689bcef0

    SHA512

    f6697ac3c29c776ed292c571dac7ca11de4eca69e2a5b7ab0419c66bbc074f3dad87efcbbd4b3fa4a2f1cc4c6976a8ba7a164a2fd152ec4388ea4f230183d4fc

  • memory/3052-15-0x0000000010000000-0x000000001006F000-memory.dmp
    Filesize

    444KB

  • memory/3052-16-0x0000000010000000-0x000000001006F000-memory.dmp
    Filesize

    444KB

  • memory/3052-18-0x0000000010000000-0x000000001006F000-memory.dmp
    Filesize

    444KB

  • memory/4128-0-0x0000000000400000-0x000000000048C050-memory.dmp
    Filesize

    560KB

  • memory/4128-2-0x0000000000400000-0x000000000048C050-memory.dmp
    Filesize

    560KB

  • memory/4796-6-0x0000000000400000-0x000000000048C050-memory.dmp
    Filesize

    560KB

  • memory/4796-11-0x0000000000400000-0x000000000048C050-memory.dmp
    Filesize

    560KB