Overview

overview

10

Static

static

3

532e97e0ff...11.exe

windows7-x64

10

532e97e0ff...11.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    34s
  • platform
    windows7_x64
  • resource
    win7-20230621-en
  • resource tags

    arch:x64arch:x86image:win7-20230621-enlocale:en-usos:windows7-x64system
  • submitted
    26-06-2023 03:17

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General

  • Target

    532e97e0ff4498854440784c6e7bcb8ed84ca654fb4acf893e8255b8a8c37911.exe

  • Size

    1.4MB

  • MD5

    59afa5bc60bf7b9adb7dd4a0df84c0d9

  • SHA1

    e3aa21d37156ea87d87ccbd011cf84896621b572

  • SHA256

    532e97e0ff4498854440784c6e7bcb8ed84ca654fb4acf893e8255b8a8c37911

  • SHA512

    4453e05b34f44f2ed9af0a51dfae9e08669812e47cc32699285c617981b1f106d617db308aff60b4da109eb1c35639a89e3e3b4d5d66d568106a5f529639bc98

  • SSDEEP

    24576:T4pCbcwQbbC+/bb2GRrILR4IKz/L5uqju6u/kKxmgMfBvOoUSd3GdrwSRHIp:UpAnhalMRLKLhjtu/3xm3GzSdWdVHG

Score
10/10
rustybuerloader

Malware Config

Extracted

Family

rustybuer

C2

https://serevalutinoffice.com/

Signatures

  • RustyBuer

    RustyBuer is a new variant of Buer loader written in Rust.

    loaderrustybuer
  • Loads dropped DLL 1 IoCs
  • Enumerates connected drives 3 TTPs 49 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\532e97e0ff4498854440784c6e7bcb8ed84ca654fb4acf893e8255b8a8c37911.exe
    "C:\Users\Admin\AppData\Local\Temp\532e97e0ff4498854440784c6e7bcb8ed84ca654fb4acf893e8255b8a8c37911.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:1268
    • C:\Users\Admin\AppData\Local\Temp\532e97e0ff4498854440784c6e7bcb8ed84ca654fb4acf893e8255b8a8c37911.exe
      "C:\Users\Admin\AppData\Local\Temp\532e97e0ff4498854440784c6e7bcb8ed84ca654fb4acf893e8255b8a8c37911.exe"
      2⤵
      • Enumerates connected drives
      PID:540

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Local\Temp\nso1BBD.tmp\System.dll
    Filesize

    11KB

    MD5

    0063d48afe5a0cdc02833145667b6641

    SHA1

    e7eb614805d183ecb1127c62decb1a6be1b4f7a8

    SHA256

    ac9dfe3b35ea4b8932536ed7406c29a432976b685cc5322f94ef93df920fede7

    SHA512

    71cbbcaeb345e09306e368717ea0503fe8df485be2e95200febc61bcd8ba74fb4211cd263c232f148c0123f6c6f2e3fd4ea20bdecc4070f5208c35c6920240f0

    Download Submit

  • memory/540-63-0x0000000000400000-0x0000000000534000-memory.dmp

    Filesize

    1.2MB

    Download

  • memory/540-65-0x0000000000400000-0x0000000000534000-memory.dmp

    Filesize

    1.2MB

    Download

  • memory/540-66-0x0000000000400000-0x0000000000534000-memory.dmp

    Filesize

    1.2MB

    Download

  • memory/540-67-0x0000000000400000-0x0000000000534000-memory.dmp

    Filesize

    1.2MB

    Download