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Analysis

  • max time kernel
    147s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    02/11/2023, 17:07

General

  • Target

    bRh5.exe

  • Size

    47KB

  • MD5

    5134c49a07d56216e9d3e4406df03dfc

  • SHA1

    96d6186f359ba0e30501f69eb0aba1e378ee888f

  • SHA256

    49aed29ad4a75261e3c9e5e1c7d081588d56a9d9094cfafb4298b73cdb42ff2f

  • SHA512

    37158c90dbe42e0ef3b96f5d747f548b09a9c58e65d8d6cccafe403a4264f5ee5cbe526d9caf04109f617daed66d46a530c9a748bbb2c3899962b9083ff1fee2

  • SSDEEP

    768:996mxUTILWCaS+DiPqMmaCVi/68YbVge+ZiHlvEgK/J7ZVc6KN:996AKWcZvzbyzYHlnkJ7ZVclN

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

Mutex

DcRatMutex_qwqdanchun

Attributes
  • delay

    1

  • install

    false

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • Async RAT payload 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bRh5.exe
    "C:\Users\Admin\AppData\Local\Temp\bRh5.exe"
    1⤵
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    PID:2516

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    999bf2acd6240bd40bdeb4a5cb2e22a9

    SHA1

    b28f6f5d455aedc3e704058b18975d26ac6e906a

    SHA256

    13d585bcc07483187c64f31f4c71066b1483bbd87baab3c8bf5ad9b532abb50f

    SHA512

    f8697102c31b3e9f20877f1db0cf8c49bcd993083d0a009e39c390eb9be8975ed1cce172bf91b6bf258eea844e94afe031f0a717b665398738763abe99511ce5

  • C:\Users\Admin\AppData\Local\Temp\CabEF31.tmp

    Filesize

    61KB

    MD5

    f3441b8572aae8801c04f3060b550443

    SHA1

    4ef0a35436125d6821831ef36c28ffaf196cda15

    SHA256

    6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

    SHA512

    5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

  • C:\Users\Admin\AppData\Local\Temp\TarEFEF.tmp

    Filesize

    163KB

    MD5

    9441737383d21192400eca82fda910ec

    SHA1

    725e0d606a4fc9ba44aa8ffde65bed15e65367e4

    SHA256

    bc3a6e84e41faeb57e7c21aa3b60c2a64777107009727c5b7c0ed8fe658909e5

    SHA512

    7608dd653a66cd364392a78d4711b48d1707768d36996e4d38871c6843b5714e1d7da4b4cc6db969e6000cfa182bcb74216ef6823d1063f036fc5c3413fb8dcf

  • memory/2516-0-0x0000000000C30000-0x0000000000C42000-memory.dmp

    Filesize

    72KB

  • memory/2516-1-0x000007FEF5C80000-0x000007FEF666C000-memory.dmp

    Filesize

    9.9MB

  • memory/2516-2-0x000000001B3F0000-0x000000001B470000-memory.dmp

    Filesize

    512KB

  • memory/2516-3-0x000007FEF5C80000-0x000007FEF666C000-memory.dmp

    Filesize

    9.9MB

  • memory/2516-4-0x000000001B3F0000-0x000000001B470000-memory.dmp

    Filesize

    512KB