tool

LookBack S0582

Type: malware
Platform: Windows
Created: 1 March 2021
Last modified: 25 April 2025

LookBack is a remote access trojan written in C++ that was used against at least three US utility companies in July 2019. The TALONITE activity group has been observed using LookBack.[1][2][3]

Techniques70th pct

TacticsTop 20%

Threat groupsNone recorded

CampaignsNone recorded

Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.

MITRE reference S0582

System Service Discovery T1007↗

LookBack can enumerate services on the victim machine.4

Discovery13 detection rules

Match Legitimate Resource Name or Location T1036.005↗

LookBack has a C2 proxy tool that masquerades as GUP.exe, which is software used by Notepad++.5

Stealth27 detection rules

Process Discovery T1057↗

LookBack can list running processes.6

Discovery10 detection rules

Windows Command Shell T1059.003↗

LookBack executes the cmd.exe command.7

Execution61 detection rules

Visual Basic T1059.005↗

LookBack has used VBA macros in Microsoft Word attachments to drop additional files to the host.8

Execution36 detection rules

File Deletion T1070.004↗

LookBack removes itself after execution and can delete files on the system.9

Stealth30 detection rules

Standing S0582

Reach is how much of ATT&CK this tool touches. Coverage is how well defended each thing it does is, as a median per technique rather than a total — a total would just restate the reach. Each figure is ranked against all 825 ATT&CK software entries only where that population actually spreads. Where most of the population shares one value, a percentile would rank the tie instead of the entity, so the raw value is shown and no rank is claimed.

Reach

Techniques1670th pct

70th percentile · 70% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.

Tactics8Top 20%

80th percentile · 80% of 825 ATT&CK software entries have this many tactics spanned or fewer.

Threat groups061% tie · 22 values

61% of the population shares a single value across only 22 distinct values, so a percentile here would rank the tie, not the entity.

Campaigns085% tie · 8 values

85% of the population shares a single value across only 8 distinct values, so a percentile here would rank the tie, not the entity.

Coverage

Rules / technique28med71st pct

71st percentile · 71% of 825 ATT&CK software entries have this many detection rules per technique or fewer.

Tests / technique8med

Detection coverage S0582

499 distinct rules cover the 16 techniques recorded for this tool. The 512 technique-to-rule mappings resolve to 499 distinct rules, because one rule can cover several techniques. 378 Sigma · 121 Splunk.

15 covered by at least one rule1 with no coverage499 distinct rules in total

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MITRE reference S0582

Reach

Coverage

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