""ET TROJAN Observed Malicious DNS Query (Reyptson Ransomware CnC)""

SID: 2024469

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_07_17, deployment Perimeter, malware_family Ransomware, malware_family Reyptson, signature_severity Major, tag Ransomware, updated_at 2019_08_28, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

• md5

• 2f60c2dc9b89a78a450839ded2a1737a

Protocol: udp

Source Network: $HOME_NET

Source Port: any

Destination Network: any

Destination Port: 53

Flow:

Contents:

• Value: "|01|" Depth: 1 Offset: 2

• Value: "|00 01 00 00 00 00 00|"

• Value: "|10|37z2akkbd3vqphw5"

Within: 7

PCRE:

Special Options:

• nocase

• fast_pattern

source