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Osiris Banking Trojan

Osiris is a banking trojan that is a variant of Kronos. Osiris has been seen from April 2018.

Threat ID:
CC-2593
Category:
Trojan
Threat Severity:
Low
Threat Vector:
Email spam
Published:
14 August 2018 12:00 AM
Report a cyber attack: call 0300 303 5222 or email [email protected]

This content has been archived

This article no longer conforms to NHS Digital's standards for cyber alerts, and may contain outdated or inaccurate information. Use of this information contained in this page is at your own risk

Summary

Osiris is a banking trojan that is a variant of Kronos. Osiris has been seen from April 2018.

Affected platforms

The following platforms are known to be affected:

Microsoft Windows

Microsoft Windows - All versions

Threat details

Osiris can be spread by email campaign featured malicious documents containing macro-scripts and a new dropper that has been using process doppelgänging and process hollowing.

Osiris has the following Capabilities:

  • Form grabber and Zeus-like web-injects compatible with the major browsers (Internet Explorer, Google Chrome, Mozilla Firefox, Microsoft Edge.)
  • 32-bit and 64-bit rootkit.
  • Antivirus and sandbox bypassing techniques.
  • Encrypted communications with Command and Control (C2) server.
  • Credit cards grabber.
  • Keylogging
  • TOR Proxy for communication with the C2

Threat updates

Date Update
1 Apr 2021 New variant observed in spam campaign

Security researchers have observed a new variant of Osiris used alongside a new Kronos-based information stealer named Ares in a spam campaign targeting German speakers. Both are obfuscated by malware packers that have been called BMPack and DarkCrypter, which are not related to any commercial tools with the same name. The indicators of compromise in this article have been updated.

Remediation advice

To prevent and detect a trojan infection, ensure that:

Remediation steps

Type Step
  • A robust program of education and awareness training is delivered to users to ensure they don’t open attachments or follow links within unsolicited emails.
  • All operating systems, anti-virus and other security products are kept up-to-date.
  • All day-to-day computer activities such as email and internet are performed using non-administrative accounts.
  • Strong password policies are in place.
  • Network, proxy and firewall logs should be monitored for suspicious activity.
  • User accounts accessed from affected devices should be reset on a clean computer.
  • Your organisation adopts a holistic all-round approach to Cyber Security as advocated by the 10 Steps to Cyber Security.

Indicators of compromise

Network indicators

URLs:

  • hxxp://ylnfkeznzg7o4xjf[.]onion/kpanel/connect.php
  • hxxp://m3r7ifpzkdix4rf5[.]onion/kpanel/connect.php
  • hxxp://qqkzfkax24p4elax[.]onion/kpanel/connect.php
  • hxxps://securebankingapp[.]com
  • hxxp://vbyrduc537l5po3w[.]onion/panel/connect.php
  • hxxp://wifoweijijfoiwjweoi[.]xyz/panel/connect.php
  • hxxp://ddkiiqefmiir[.]xyz/panel/connect.php
  • hxxp://ddkiilefmjim[.]xyz/panel/connect.php
  • hxxp://ddkiieeelkif[.]xyz/panel/connect.php
  • hxxp://ddkiiofelkkq[.]xyz/panel/connect.php
  • hxxp://ddkiihfelikh[.]xyz/panel/connect.php
  • hxxp://ddkiiffdkijh[.]xyz/panel/connect.php
  • hxxp://ddkiigedliji[.]xyz/panel/connect.php
  • hxxp://ddkiirfdmjks[.]xyz/panel/connect.php
  • hxxp://ddkiitefkkju[.]xyz/panel/connect.php
  • hxxp://mydynamite.dynv6[.]net/panel/connect.php
  • hxxp://cabletv[.]top/panel/connect.php

SNORT rule:

alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"Zscaler TROJAN Ares Command Beacon"; flow:established,to_server; content:"POST"; http_method; content:"/connect.php?a="; http_uri; classtype:trojan-activity; rev:1;)

Host indicators

File hashes (SHA-256):

  • da767e6faf97d73997f397eae71b372a549dd6331bf8ec0ebd398ef8cfe9a47e
  • 5e7642e945bd05ecea77921cb3464b6da8db59e5ff38240608e3cbb44b07fb1d
  • 7498e37c332d55c14247ae4b675e726336a8683900d8fd1da412905567d2de4a
  • e5d624b7060c0e885abe11a0973a43a355c9930fc6912ff5eac83d1a9eec9c29
  • 035793d479c4229693fc6dcceaa639cd51ae89334b43e552b9c47a6dea68ce30
  • 94b084ea925990742f4eaaada1eef9a42c13066bf4f4c7a3b12a1509e32ff9e6
  • 09897c6ef88b9e9bc20917a2b47ec86ff2b727a2923678f5e2df6bb6437d3312
  • 896cebf465257f60347e58ffd7ec61629cf530956ef9b00e94f8b40ef9b30581
  • 956ae36f40d0d847daa00d7964906e7e9d1671d0f3f2e7d257d5a8d324388c31
  • 6c5dac9043b2f112543f3eca6503d4bcc70d762b47d75dcb85f9767c603de56f
  • b3348405cd0fa66661b46bc6cbab97b55708be26a2ed7a745e1632b46d1b3f41
  • 4044abad9a846e203f131c65b1f84bb2b79f94000d1d7be6c6d6a8e27ac76940

YARA rules:

rule kronos_string_decryption
{
  strings: 
    $ = {6a 1e 5f f7 f7 8b 45 08 8d 3c 1e 8a 04 38 8a ?? ?? ?? ?? ?? 32 c2}   
    $ = {55 8b ec 51 8b 4d 08 c1 e1 04 8b ?? ?? ?? ?? ?? 8a}
  condition: 
    all of them
}

rule kronos_api_strings
{
  strings:
    $ = "D7T1H5F0F5A4C6S3"
    $ = "H2G3F4F0F5A4D5E6"
    $ = "X1U5U8H8F5A4C8C5"
    $ = "E3D7R6B3R4H5F3R7"
    $ = "X8D3U3P7S6Q3S5R1"
    $ = "X8D3T6Q6U3S3A6R1"
    $ = "R6G2D2R3A5E3C4U5"
    $ = "H7Y6G2R3A5F4D3S8"
    $ = "P7Y3Q5P0Y8C2Y6F6"
    $ = "R6Y7B3C6E7E6T7U7"
    $ = "G2F3G6A6R3F1P6G2"
    $ = "S3H8T8Y5F5B5B0X0"
    $ = "C8G2T3U3B1H3T5B5"
    $ = "C4R7A2P4X3B1H5A4"
    $ = "R3Q7T7Q2R6S1Y3R5"
    $ = "E3C3A2Y3C4U6S5F5"
    $ = "F3P7Y6P3U3E2U5F3"
    $ = "E5X0A4Q4F0Y0D6E2"
    $ = "X2R0A4Q4F0Y0D6F3"
    $ = "H1G7R4Y7D1E6R5F8"
    $ = "G3C3R4H7R5T8E5R8"
    $ = "F6H5P7T4F6D6Y6D4"
    $ = "E3C7U2Y3C3R6R5D5"
    $ = "F5E8X5G3Q6T7E6T3"
    $ = "E1U3D5F7R2Y5S0H4"
    $ = "H3Y5C8Y2D4U8Y4S3"
    $ = "U0U6H1T2F6S1P2Y5"
    $ = "D5R3T8D5D3H0B4E2"
    $ = "D5B6G6R4A6H1P7A3"
    $ = "F1Q3D0H4H3T6U1X5"
    $ = "A4T6P1G7D6G0F3S5"
    $ = "C7G5T6P7U5B1H0F5"
    $ = "X2C7E3U6F3A7Y1D5"
    $ = "P4Y7T7R7R8X3E3A3"
    $ = "C5Y7R2R2H1R7A1B2"
    $ = "S4A3E3S3S4T1T3D1"
    $ = "B4Y2H7F8A2T3G4H3"
    $ = "B5D6X4H5G6S3R2B5"
    $ = "B6F6X4A8R5D3A7C6"
    $ = "C6P7E6P7A1R5Q4R7"
    $ = "R8S7D7S8H6Y4T6B7"
    $ = "U0S3T3D3U5F5B4E8"
    $ = "F6C3U4P4X3B1H3T5"
    $ = "T2F2T3U2H5B1C1A7"
    $ = "T0E0H4U0X3A3D4D8"
    $ = "C5R4X4H7R5T7A5R6"
    $ = "D3S0A7R4F6C8F2R5"
    $ = "Y1C1B6A7H3C0E7E7"
    $ = "H2E7A5B8Q6G3S7Y3"
    $ = "D3Q5F2F3R5Y5Y8S2"
    $ = "Y2C3G8R5R3A5F5B4"
    $ = "F1D2B6A5T3X2C8R1"
    $ = "G5D3P2G0F6G2H8E6"
    $ = "Y6Q6P2G0E5E6G2H8"
    $ = "Y7D3F3S7X2S4F2X3"
    $ = "X7D0E3R2R4Q0E4D3"
  condition:
    25 of them
}

Last edited: 1 April 2021 5:03 pm