""ET TROJAN Win.Backdoor.Kolobko-9950676-0 Retrieving CnC Commands""

SID: 2038508

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_08_15, deployment Perimeter, signature_severity Major, updated_at 2022_08_15

Reference:

• Link

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

• Value: "GET"

• Value: "/bot/" Depth: 5

• Value: "?botid="

• Value: "User-Agent|3a 20|Mozilla|2f|5|2e|0|2028|Windows|20|NT|20|10|2e|0|3b20|Win64|3b20|x64|2920|AppleWebKit|2f|537|2e|36|2028|KHTML|2c20|like|20|Gecko|2920|Chrome|2f|99|2e|0|2e|4844|2e|51|20|Safari|2f|537|2e|36|20|Edg|2f|99|2e|0|2e|1150|2e|36|20|Trailer|2f|95|2e|3|2e|1132|2e|33|0d 0a|"

Within: 9

PCRE:

Special Options:

• http_method

• http_uri

• http_uri

• fast_pattern

• http_header

source