General

  • Target

    C11Bootstrapper.zip

  • Size

    214KB

  • Sample

    240419-zd5b9seh65

  • MD5

    350fd482e9f472a09cba68aeb0020ddf

  • SHA1

    7f31fbacd12e8a4fcd355c5cff97a2f2e67c4026

  • SHA256

    d3e1c2f2dd8d4a80459df74eeb9a1d967f91ff3af3b106be6cd7a96dc319a062

  • SHA512

    7af82aa1b373eb0d22d5289b4eddbfb1eddb2bda910a375c940ac1ca452b7e29e60224b44c143d9099be083cf72483448a865e41abb48928e0ec6567e9a7db6f

  • SSDEEP

    6144:NA3cXkEnu8vjKbnU9tWCnHGXf3fgDmzV4e42H6D:NAMXkr8IUjmXfPgDmzH42aD

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

127.0.0.1:4449

127.0.0.1:4040

Mutex

chhphkahmfnasuyziqc

Attributes
  • delay

    1

  • install

    false

  • install_folder

    %Temp%

aes.plain
aes.plain

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1210158511317590106/v9w3kiFGxTmHnaLb091GZCxjv8fdr5efj0qIDNAgPdpreNR5UKL8WQl7YxoqctUCkOnB

Targets

    • Target

      C11Bootstrapper/Properties/C11Setup.exe

    • Size

      252KB

    • MD5

      c23a7c501e475f0065efdc9775890deb

    • SHA1

      adc0d1bb12657bd6ca4354399cbfab7b9ad9cd45

    • SHA256

      b57490326cb83aaf68d2ddfd95655b89387956100c5d09c8fcd4fa50e54fb5c4

    • SHA512

      f6374e254a5ccad62549b235b4c66ef6164cfc34fd91d9ca545d44dce87c3d78984759e858d5eae796f8a096f91cf3fe5f0e1255660b00b1ece430e82af539c7

    • SSDEEP

      3072:yURcxONo2PMVI+DdH1bsv8eOQbR7c2ytBcL5BdkwvTkmEdxkY:yEo2PMVPdVbSOkWwvqdK

    Score
    10/10
    • AsyncRat

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

    • Target

      C11Bootstrapper/Properties/GuiLoader.exe

    • Size

      246KB

    • MD5

      1bb249792e56063762f5adb2d94fc8c9

    • SHA1

      9a1fa4886ed023f864c06345b639a121f6359cd1

    • SHA256

      f61483bd59316dff21d5bc3fc8f32811dd8ddca826a84255ab5ea2cdfef3d7ae

    • SHA512

      d8a2af35713bf4ce979440375c460b9f7b3f2849abc9cdf0d2fdb5e891a5bab36ed101da94f6b57d3dc775c3a0fdeffbaeab8981965ec72fe56adfa5dab501ba

    • SSDEEP

      6144:RloZM+rIkd8g+EtXHkv/iD4kgOZGCg/7I7R0STTKvYb8e1mZzi:joZtL+EP8kgOZGCg/7I7R0STTKIX

    Score
    10/10
    • Detect Umbral payload

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

    • Drops file in Drivers directory

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Target

      C11Bootstrapper/Properties/IndependenciesInstallation.bat

    • Size

      489B

    • MD5

      d8da01fb6f6288b044868f85228cbb10

    • SHA1

      9d08c813ce59ab863c6ec3c68c336eed265c5e8a

    • SHA256

      74416d022dde876ff622038a6359907da239bbd26ceb7024f5d39dd52f16c9de

    • SHA512

      c92b83ba5513694e05cf908a747609dd6fd3c70944d04a9b8a62939f4372561e4feb567d158b0316853c50a0c241a1c8c075875746a1e538912ea91ff84c308e

    • AsyncRat

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

    • Detect Umbral payload

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

    • Drops file in Drivers directory

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Target

      C11Bootstrapper/Properties/PageEditor.exe

    • Size

      74KB

    • MD5

      a419717ff743b0f11fdde27177617cb5

    • SHA1

      38e6575ad65c4cdf3301c22ff6d827e11436006f

    • SHA256

      41adf4e4e460a3119ad27d5874f7ea6e09781eb91e33d90e4a5faeeaadee8300

    • SHA512

      0f9a00f3d5027e6aa5636d2564db89787cc83224aa83c771822655a057fffe2f2e642c98ca9ff603ed3be4ea655d5c02c8a28161895036e80284d009ddf9b1d6

    • SSDEEP

      1536:gUYkcx9pXCTyPMVXjCBevPIaH1b8/uDaQzcp1VclN:gU1cx958yPMVzCCrH1b8BQ8XY

    Score
    10/10
    • AsyncRat

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

    • Target

      C11Bootstrapper/Properties/msgbox.vbs

    • Size

      96B

    • MD5

      ef10af9d03259c1ff948292a02f686b0

    • SHA1

      66e00f6e8827074757939faaca94764757bf35b7

    • SHA256

      a60243608aebfe0cd20869cb1d8d62e937752ca0d8e45b09c1b474ae5f1a4b07

    • SHA512

      2ffe2d8314699579912484f2149f876878b55618ab55aa6a3cf3cb99c761a9df77af5147e62b652458d3f9eb560a97fa8c07ec3d7faf559cae4f86633070f74d

    Score
    1/10
    • Target

      C11Bootstrapper/Start.bat

    • Size

      1KB

    • MD5

      4e3179e79f11708b60c3af67718cc0ae

    • SHA1

      e22536c444427ce73dcc50091c28477c44e23210

    • SHA256

      6953af9e22a172b023757199cc77c0ea2353bfe7ab1843516a161081f0c1d76d

    • SHA512

      aaf2402399fe8887fe516a3be50054129298970dc322652dc02578a523be74135e02b6856f0b7b774df3c827b131d54828143583038bc5350c40e89dcd1409e1

    • AsyncRat

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

    • Detect Umbral payload

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

    • Drops file in Drivers directory

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

MITRE ATT&CK Enterprise v15

Tasks