General

  • Target

    C11Bootstrapper.zip

  • Size

    214KB

  • Sample

    240419-zq5hssgb5s

  • MD5

    f10cd6c2c913e26f56156a3c752e45ed

  • SHA1

    08a63385a432c89419e21bb7c9be972032296788

  • SHA256

    fc1ad8d1483f0b1c94b55be7b7587b86485022ca4e62e6fb0c06e392dfaeecd2

  • SHA512

    8cc81d3cd29d2749234b0ec760bd929bd7ea5f6444e5fb51c9617c493cd166498296b258de7a7e647d5b87c0e1e825be7bebc502fd8bc5c295d282918830013b

  • SSDEEP

    6144:DA3cXkEnu8vjKbnU9tWCnHGXf3fgDmCyexHkv:DAMXkr8IUjmXfPgDmKxEv

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

127.0.0.1:4449

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#.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Target

      C11Bootstrapper/Properties/PageEditor.exe

    • Size

      74KB

    • MD5

      71887b035c3be525364fccc5281bd451

    • SHA1

      4a6ae558ee5a81b8282f44ffb270b82188431c79

    • SHA256

      ff6f8d1b16defe87d9f6b1c39e3864ed35b965728f6f58629ae0eae70ee88e1b

    • SHA512

      ab61935aaf3e08f369a2fbdea2fee45b0e964c962f4a54b79ed0d4d94f483a331020148dc012991133f08c4a51d53ebb5ea9ea05561197f95e61723156978cb6

    • SSDEEP

      1536:rUokcx5v/5CxSPMV7jCBevPIaH1b8/x4YqGQzcx8VclN:rUlcx5vx2SPMV3CCrH1b875Q0+Y

    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

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • 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