Description of Campaign
A malicious loader with an embedded Remote Access Tool (RAT) was discovered to provide the unknown threat actor with a range of capabilities. The malware allows remote administration, keylogging, the creation of a reverse shell, and the ability to upload and download files and additional malware.
Our ATR Team gathers and analyzes information from multiple open and closed sources before disseminating intelligence reports. This campaign was researched by CISA and
shared publicly.
How to use this article:
- Scroll down and review the Product Countermeasures section of this article. Consider implementing them if they are not already in place.
- Review the following articles:
Threat Hunting
| YARA |
rule CISA_10382580_03 : loader
{
meta:
Author = "CISA Code & Media Analysis"
Incident = "10382580"
Date = "2022-05-02"
Last_Modified = "20220602_1200"
Actor = "n/a"
Category = "Loader"
Family = "n/a"
Description = "Detects loader samples"
MD5_1 = "3764a0f1762a294f662f3bf86bac776f"
SHA256_1 = "f7f7b059b6a7dbd75b30b685b148025a0d4ceceab405e553ca28cacdeae43fab"
MD5_2 = "21fa1a043460c14709ef425ce24da4fd"
SHA256_2 = "66966ceae7e3a8aace6c27183067d861f9d7267aed30473a95168c3fe19f2c16"
MD5_3 = "e9c2b8bd1583baf3493824bf7b3ec51e"
SHA256_3 = "7ea294d30903c0ab690bc02b64b20af0cfe66a168d4622e55dee4d6233783751"
MD5_4 = "de0d57bdc10fee1e1e16e225788bb8de"
SHA256_4 = "33b89b8915aaa59a3c9db23343e8c249b2db260b9b10e88593b6ff2fb5f71d2b"
MD5_5 = "9b071311ecd1a72bfd715e34dbd1bd77"
SHA256_5 = "3c2c835042a05f8d974d9b35b994bcf8d5a0ce19128ebb362804c2d0f3eb42c0"
MD5_6 = "05d38bc82d362dd57190e3cb397f807d"
SHA256_6 = "4cd7efdb1a7ac8c4387c515a7b1925931beb212b95c4f9d8b716dbe18f54624f"
strings:
$s0 = { B8 01 00 00 00 48 6B C0 00 C6 44 04 20 A8 B8 01 }
$s1 = { 00 00 48 6B C0 01 C6 44 04 20 9A B8 01 00 00 }
$s2 = { 48 6B C0 02 C6 44 04 20 93 B8 01 00 00 00 48 }
$s3 = { C0 03 C6 44 04 20 9B B8 01 00 00 00 48 6B C0 }
condition:
all of them
} |
| YARA |
rule CISA_10382580_01 : rat
{
meta:
Author = "CISA Code & Media Analysis"
Incident = "10382580"
Date = "2022-05-25"
Last_Modified = "20220602_1200"
Actor = "n/a"
Category = "Remote Access Tool"
Family = "n/a"
Description = "Detects Remote Access Tool samples"
MD5_1 = "199a32712998c6d736a05b2dbd24a761"
SHA256_1 = "88a5e4b24747648a4e3f0a2d5282b51683260f9208b06788fc858c44559da1e8"
strings:
$s0 = { 0F B6 40 0F 6B C8 47 41 0F B6 40 0B 02 D1 6B C8 }
$s1 = { 35 41 0F B6 00 41 88 58 01 41 88 78 02 41 88 70 }
$s2 = { 66 83 F8 1E }
$s3 = { 66 83 F8 52 }
condition:
all of them
} |
This Knowledge Base article discusses a specific threat that's being tracked. The list of IOCs will change over time; check Trellix Insights for the latest IOCs.
Campaign IOC
| Type |
Value |
| IP-DST |
192.95.20.8 |
Minimum set of Manual Rules to improve protection to block this campaign:
IMPORTANT: Always follow best practices when you enable new rules and signatures.
When you implement new rules or signatures, always set them to Report mode first and check the alerts generated. Resolve any issues that arise and then set the rules to Block. This step mitigates against triggering false positives and allows you to refine your configuration.
For more information, see KB87843 - List of and best practices for Endpoint Security Dynamic Application Containment rules.
Endpoint Security - Advanced Threat Protection:
Rule ID: 5 Use GTI URL reputation to identify trusted or malicious processes
