LazyWiper has used PowerShell to enable data destruction on targeted systems.2
tool
LazyWiper S9039
- Type
- malware
- Platform
- Windows
- Created
- 22 April 2026
- Last modified
- 12 May 2026
LazyWiper is a destructive malware observed targeting a manufacturing sector company during the 2025 Poland Wiper Attacks. LazyWiper is a native Windows PowerShell script that is believed to have been generated by a large language model (LLM). LazyWiper overwrites files on the system using the C# function WriteRandomBytes() and can target multiple specific file types by their extensions.[1]
8
Techniques38th pct
6
Tactics53rd pct
0
Threat groupsNone recorded
1
Campaignunranked
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S9039
LazyWiper has used [System.Net.Dns]::GetHostName() and $env:COMPUTERNAME to enumerate the hostname of a system and determine if it is a domain controller.3
LazyWiper can specifically target multiple files by extension including: .rar, .tar.gz, .zip, .7z, .json, .bcp, .bak, .gho, .erf, .edb, .onepkg, .pst, and .ldiff.4
LazyWiper can halt execution if [System.Net.Dns]::GetHostName() or $env:COMPUTERNAME contains “pe-dc”.5
LazyWiper has overwritten files with pseudorandom 32‑byte sequences written at 16‑byte intervals making the file unrecoverable.6
LazyWiper is believed to have been generated by a large language model (LLM) due to the non-sensical comments in the code.7
Standing S9039
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
Techniques838th pct
38th percentile · 62% of 825 ATT&CK software entries have more Enterprise techniques.
Tactics653rd pct
53rd percentile · 53% 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.
Campaign185% 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 / technique41.5medTop 12%
88th percentile · 88% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Tests / technique7med
Detection coverage S9039
717 distinct rules cover the 8 techniques recorded for this tool. The 726 technique-to-rule mappings resolve to 717 distinct rules, because one rule can cover several techniques. 471 Sigma · 246 Splunk.
6 covered by at least one rule2 with no coverage717 distinct rules in total
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