Analysis

  • max time kernel
    88s
  • max time network
    70s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    14-07-2021 16:03

General

  • Target

    f99fd17cc305e25cae93a53c5d7b5741.exe

  • Size

    922KB

  • MD5

    f99fd17cc305e25cae93a53c5d7b5741

  • SHA1

    f02ba6a83b0b52301e4e6d5ce486abcc88ef0421

  • SHA256

    463ace81e13b8db2ec0d6ee4182e27a7a91c9c65555006ad064cd1e27e92a46c

  • SHA512

    63dfe798d9a93d236f05aebd25dce4679fa227c27bca381e1771dfc2788cd735eb6aa36b07fc2d2d2cec0576987b91dba8e459165d4676741e9f29d293389f59

Malware Config

Signatures

  • A310logger

    A310 Logger is a .NET stealer/logger targeting passwords from browsers and email clients.

  • StormKitty

    StormKitty is an open source info stealer written in C#.

  • StormKitty Payload 2 IoCs
  • A310logger Executable 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.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f99fd17cc305e25cae93a53c5d7b5741.exe
    "C:\Users\Admin\AppData\Local\Temp\f99fd17cc305e25cae93a53c5d7b5741.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:652
    • C:\Users\Admin\AppData\Local\Temp\f99fd17cc305e25cae93a53c5d7b5741.exe
      "C:\Users\Admin\AppData\Local\Temp\f99fd17cc305e25cae93a53c5d7b5741.exe"
      2⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2228
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\PASSWORDSNET4.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\PASSWORDSNET4.exe
        3⤵
        • Executes dropped EXE
        • Checks processor information in registry
        PID:8
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\CREDITCARDNET4.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\CREDITCARDNET4.exe
        3⤵
        • Executes dropped EXE
        PID:3876

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/8-134-0x00000000006A0000-0x00000000006A1000-memory.dmp

    Filesize

    4KB

  • memory/652-120-0x0000000004C30000-0x0000000004CCC000-memory.dmp

    Filesize

    624KB

  • memory/652-118-0x0000000004E70000-0x0000000004E71000-memory.dmp

    Filesize

    4KB

  • memory/652-124-0x0000000005C30000-0x0000000005CA0000-memory.dmp

    Filesize

    448KB

  • memory/652-116-0x0000000004CD0000-0x0000000004CD1000-memory.dmp

    Filesize

    4KB

  • memory/652-123-0x0000000005B70000-0x0000000005C24000-memory.dmp

    Filesize

    720KB

  • memory/652-117-0x00000000052D0000-0x00000000052D1000-memory.dmp

    Filesize

    4KB

  • memory/652-122-0x0000000004D90000-0x0000000004DA0000-memory.dmp

    Filesize

    64KB

  • memory/652-121-0x0000000004FD0000-0x0000000004FD1000-memory.dmp

    Filesize

    4KB

  • memory/652-114-0x00000000003D0000-0x00000000003D1000-memory.dmp

    Filesize

    4KB

  • memory/652-119-0x0000000004D70000-0x0000000004D71000-memory.dmp

    Filesize

    4KB

  • memory/2228-132-0x0000000002790000-0x0000000002792000-memory.dmp

    Filesize

    8KB

  • memory/2228-129-0x0000000000400000-0x000000000044A000-memory.dmp

    Filesize

    296KB

  • memory/2228-125-0x0000000000400000-0x000000000044A000-memory.dmp

    Filesize

    296KB

  • memory/3876-139-0x0000000000910000-0x0000000000911000-memory.dmp

    Filesize

    4KB