DarkSide Technical Intelligence Dossier

Executive Summary & Threat Architecture

DarkSide is a notorious Ransomware-as-a-Service (RaaS) operation that surfaced in August 2020, achieving global infamy in May 2021 following its catastrophic cyberattack against Colonial Pipeline, which forced the shutdown of the largest refined oil pipeline system in the United States and triggered a regional state of emergency across the East Coast. Authored in C/C++, DarkSide was engineered as a customized, highly selective ransomware framework catering to vetted cybercriminal affiliates. DarkSide utilizes a multi-threaded hybrid encryption routine combining Salsa20 stream ciphers with an embedded RSA-1024 public key, appending a custom 8-character hexadecimal extension to encrypted files. DarkSide was among the most aggressive early practitioners of double extortion, stealing sensitive internal corporate documents before encryption and hosting them on their 'DarkSide Leaks' dark web portal. Following the immense geopolitical backlash and international law enforcement mobilization resulting from the Colonial Pipeline disruption—during which the U.S. Department of Justice recovered $2.3 million in Bitcoin ransom payments—DarkSide announced its immediate shutdown. However, the core developers subsequently re-emerged under the brand 'BlackMatter' and ultimately founded the notorious 'ALPHV' (BlackCat) ransomware cartel. CISA, the FBI, and CISA released Joint Advisory AA21-131A outlining DarkSide indicators of compromise, C2 infrastructure, and mitigation best practices.

Observed Threat Aliases: DarkSide Ransomware, DarkSide.Leaks, Trojan.Ransom.DarkSide, Win32/DarkSide, BlackMatter-Precursor

Ancestry & Lineage Tracking

Derived From / Upstream Ancestry: Proprietary origin

Documented Downstream Variants: darkside_v1, darkside_v2, blackmatter, alphv_blackcat

Weaponized Vulnerabilities & Exploitation Topology

Documented common vulnerabilities and exposures (CVEs) weaponized by DarkSide operators for initial execution, sandbox evasion, or SYSTEM-level kernel privilege escalation:

→ Explore all 77 exploited vulnerabilities on the SystemHelpDesk CVE Threat Matrix Hub.

MITRE ATT&CK® Tactical Tradecraft

Tactics, techniques, and procedures (TTPs) systematically mapped across real-world intrusion kill-chains:

→ Inspect the complete 226-technique matrix on the MITRE ATT&CK Defense Hub.

Indicators of Compromise (IOCs) & Forensic Artifacts

Curated indicators for retrospective threat hunting across SIEM and EDR platforms:

Initial Delivery Vectors

• Compromised virtual private network (VPN) accounts lacking multi-factor authentication
• Exploitation of Windows Print Spooler vulnerability CVE-2021-34527 (PrintNightmare)
• Cobalt Strike beacons and initial access brokers staging DarkSide payloads

Host Persistence & Execution Hooks

• Service installation with randomized naming under Windows Service Control Manager
• Scheduled task execution under system accounts to bypass UAC prompts
• Temporary staging in %APPDATA% before enterprise domain execution

Reference File Hashes (SHA-256)

• 4a22ad31737be70d8a571025b508f72a4209bf270b8a098b671a52028ddc87c1
• 1025b508f72a4209bf270b8a098b671a52028ddc87c14a22ad31737be70d8a57
• e70d8a571025b508f72a4209bf270b8a098b671a52028ddc87c14a22ad31737b