General

  • Target

    HEUR-Trojan-Ransom.MSIL.Crypmodadv.gen-2b5c0eed6f0e364b39dba4263611b01e7c2399232fbf23a66ad17760d616314c.exe

  • Size

    284KB

  • Sample

    220921-enh7kaaefp

  • MD5

    668983cf8223a398f4b8a1a4d7cddb7a

  • SHA1

    8fa5d4312dd5f1964a3bd34d2c09842ec02f135c

  • SHA256

    2b5c0eed6f0e364b39dba4263611b01e7c2399232fbf23a66ad17760d616314c

  • SHA512

    5e0e868a6640d1bf836142f14c3d29d658996e38e3e380c670132c0c85cbf8f9c6dfa0d58d9a04b2606ab1d0cf8d2c26449f869003c03207591d09e0061d9646

  • SSDEEP

    6144:ISoIcVpYGcAeYIiSOOrYJoLiWMWvGKab2btuMcjV:ILIaBoU4iFWvztuMcjV

Score
10/10

Malware Config

Extracted

Path

C:\Users\Public\Pictures\Sample Pictures\ARGUS-DECRYPT.html

Ransom Note
<html><head><style>body{background: #000041 no-repeat;font-family:Consolas;color: rgb(235, 235, 235);font-size:23px;}ul{margin-left: 400px;text-align: left;}p{display:none;}span{display:none;}</style></head><body><div align="center"><h3>.-=| ARGUS CRYPTOR V1.0 |=-. </h3><br>Attention!<br>All your files, documents, photos, databases and other important files are encrypted!<br>The only method of recovering files is to purchase an unique private key. Only WE can recover your files!<br>You can get the private key by email as well as through a closed TOR network. You can get there by the following ways<br><br><----------------------------------------------------------------------------------------><br><ul><li> Main email : argusdecrypt@cock.li </li><li> Reserved email : argusdecrypt@mailfence.com </li><li> Follow the instructions</li><h3> If the answer for a long time no</h3><li> Download Tor browser - https://www.torproject.org/download/download-easy</li><li> Install Tor browser </li><li> Open Tor Browser </li><li> Open link in TOR browser: http://argusqug6aw25gye.onion/ </li><li> Follow the instructions on this page</li></ul><----------------------------------------------------------------------------------------><br><br><br>You can get the opportunity to decrypt 1 file for free.<br><br><br>ATTENTION!<br>IN ORDER TO PREVENT DATA DAMAGE:<br><br>* DO NOT MODIFY ENCRYPTED FILES<br>* DO NOT DELETE ENCRYPTED FILES<br>* DO NOT RENAME ENCRYPTED FILES<br><br><p>---BEGIN PC DATA--- eyJrZXkiIDogImVJb3NGaFpIMFZWazMzSWExdUJIZlZMcEV1ZWxoQ0dJVDJJSXpzYW9LOXA0c01SaEtOdGxEMGFDc0JmaERLWU5HQi9adU1lTkQ4UDFRVnRFNEVPa05RPT0iLCAibXNnIiA6ICJKZnZ2Nk1kcjgwdnV3L3NWVkhlUm9rRlk2dlNXczZtb3c2NTg4UXdEUVpsQUVRMTdSRE9yN2w5dDNsNkR0VG9uMzB2MFZ1RkxsWjNsQjZ6cVp1aUJVQ0VyVkVobFRBdUxCbFEzeUhnVTM0RjEwUnBlWlNVWXdFdDdzWFR0dlJINjNNUGtRcmVQVXNPL2M2MzFUbWRCMU1LSUVXUVJUWElDb2ZOSWd1eXN3aUZ1blFOQ0o1N1U0cEZSRFNNN2g2eWgifQ== ---END PC DATA---</p></div></body></html>
Emails

argusdecrypt@cock.li

argusdecrypt@mailfence.com

URLs

http://argusqug6aw25gye.onion/

Extracted

Path

C:\Users\Admin\Music\ARGUS-DECRYPT.html

Ransom Note
<html><head><style>body{background: #000041 no-repeat;font-family:Consolas;color: rgb(235, 235, 235);font-size:23px;}ul{margin-left: 400px;text-align: left;}p{display:none;}span{display:none;}</style></head><body><div align="center"><h3>.-=| ARGUS CRYPTOR V1.0 |=-. </h3><br>Attention!<br>All your files, documents, photos, databases and other important files are encrypted!<br>The only method of recovering files is to purchase an unique private key. Only WE can recover your files!<br>You can get the private key by email as well as through a closed TOR network. You can get there by the following ways<br><br><----------------------------------------------------------------------------------------><br><ul><li> Main email : argusdecrypt@cock.li </li><li> Reserved email : argusdecrypt@mailfence.com </li><li> Follow the instructions</li><h3> If the answer for a long time no</h3><li> Download Tor browser - https://www.torproject.org/download/download-easy</li><li> Install Tor browser </li><li> Open Tor Browser </li><li> Open link in TOR browser: http://argusqug6aw25gye.onion/ </li><li> Follow the instructions on this page</li></ul><----------------------------------------------------------------------------------------><br><br><br>You can get the opportunity to decrypt 1 file for free.<br><br><br>ATTENTION!<br>IN ORDER TO PREVENT DATA DAMAGE:<br><br>* DO NOT MODIFY ENCRYPTED FILES<br>* DO NOT DELETE ENCRYPTED FILES<br>* DO NOT RENAME ENCRYPTED FILES<br><br><p>---BEGIN PC DATA--- eyJrZXkiIDogIktuS2dCQlk5MWkzNVViMmpxZjBZU2R1anJ5a00zeWgxWWhUZW9oc0NnbGE1ZXg4ekdXalBkeWE1M0oyMm9ZSVhwM0x2YUc3ZElmWXBsb09xV3ZBZVpRPT0iLCAibXNnIiA6ICIzQ0liOUhIZkJLeGd5SktuaWhveFJFZlk4ZmpVdWdYRDlIWTlHelJMZ0UvVTZiMm1SOU1GUmIwSXg3NExHUHRPb2dDY1E1NEdoekd5UGpoUlIzWnY2TytRVWdGN1p3a3BpVGlGQmxlVUVkbXduREVkUmczTXNJellCcVlUL3IxaE5oY2xHbkFUQlFWdnRubjg3L29xeVZkbmsvVUJZdzJ5TWg2MnJJQXg5V09JMkIwWjNTZVJlL2lYdm5IeEFwdkIifQ== ---END PC DATA---</p></div></body></html>
Emails

argusdecrypt@cock.li

argusdecrypt@mailfence.com

URLs

http://argusqug6aw25gye.onion/

Targets

    • Target

      HEUR-Trojan-Ransom.MSIL.Crypmodadv.gen-2b5c0eed6f0e364b39dba4263611b01e7c2399232fbf23a66ad17760d616314c.exe

    • Size

      284KB

    • MD5

      668983cf8223a398f4b8a1a4d7cddb7a

    • SHA1

      8fa5d4312dd5f1964a3bd34d2c09842ec02f135c

    • SHA256

      2b5c0eed6f0e364b39dba4263611b01e7c2399232fbf23a66ad17760d616314c

    • SHA512

      5e0e868a6640d1bf836142f14c3d29d658996e38e3e380c670132c0c85cbf8f9c6dfa0d58d9a04b2606ab1d0cf8d2c26449f869003c03207591d09e0061d9646

    • SSDEEP

      6144:ISoIcVpYGcAeYIiSOOrYJoLiWMWvGKab2btuMcjV:ILIaBoU4iFWvztuMcjV

    Score
    10/10
    • Executes dropped EXE

    • Modifies extensions of user files

      Ransomware generally changes the extension on encrypted files.

    • Checks computer location settings

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

    • Loads dropped DLL

    • Obfuscated with Agile.Net obfuscator

      Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

    • Looks up external IP address via web service

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

    • Sets desktop wallpaper using registry

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Impact

Defacement

1
T1491

Tasks