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SEKOIA_Exploit_Cve20191458_Strings

Detects compiled exploit for CVE-2019-1458 (Generic)

ExploitSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X
Author
Sekoia.io
Date
2022-08-29
Modified
2024-12-19
Score / Quality
75 / 80

What this rule detects

Detects compiled exploit for CVE-2019-1458 (Generic)

Targets: Windows PE.

It defines 5 patterns (5 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
exploit-cve20191458-strings.yarDetection Rule License 1.1
rule SEKOIA_Exploit_Cve20191458_Strings : CVE_2019_1458 FILE
{
	meta:
		description = "Detects compiled exploit for CVE-2019-1458 (Generic)"
		author = "Sekoia.io"
		id = "0be4a550-0f0a-4596-ab32-aafaececf919"
		date = "2022-08-29"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/exploit_cve20191458_strings.yar#L1-L21"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "8e22a79b3d7dc45d63062c71909faee61584c71b6ea7353ba0f40c00745a2075"
		score = 75
		quality = 80
		tags = "CVE-2019-1458, FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "[-] Failed to create SploitWnd window"
		$ = "[+] ProcessCreated with pid %d!"
		$ = "[!] Exploit fail, test:0x%p,tagWND:0x%p, error:0x%lx"
		$ = "[*] tagWND: 0x%p, tagCLS:0x%p, gap:0x%llx"
		$ = "[*] Simulating alt key press"

	condition:
		uint16be( 0 ) == 0x4d5a and filesize < 200KB and 3 of them
}

Strings (5 patterns)

IdentifierTypeValueModifiers
$text"[-] Failed to create SploitWnd window"
$text"[+] ProcessCreated with pid %d!"
$text"[!] Exploit fail, test:0x%p,tagWND:0x%p, error:0x%lx"
$text"[*] tagWND: 0x%p, tagCLS:0x%p, gap:0x%llx"
$text"[*] Simulating alt key press"

Condition

uint16be( 0 ) == 0x4d5a and filesize < 200KB and 3 of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • The file must be smaller than 200KB (a cheap guard that skips large files).
  • At least 3 patterns in the rule must match.

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References

Licence & attribution

Author: Sekoia.io

Source repository: SEKOIA.IO Community @ a438a5901a

Licence: Detection Rule License 1.1 (repository licence)

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: 0be4a550-0f0a-4596-ab32-aafaececf919

Metadata

version1.0
classificationTLP:CLEAR

Tags:CVE_2019_1458FILE

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