Diverse Threat Actors Exploiting Critical WinRAR Vulnerability CVE-2025-8088

    Date: 01/29/2026

    Severity: High

    Summary

    Multiple threat actors, including Russia- and China-linked state-sponsored groups as well as financially motivated attackers, are actively exploiting the critical CVE-2025-8088 flaw in WinRAR. The vulnerability, patched in July 2025, allows path traversal to drop malicious files into the Windows Startup folder, enabling persistence and payload delivery. Ongoing abuse of this n-day highlights how attackers continue to capitalize on slow patch adoption and gaps in basic software hygiene to gain initial access across varied intrusion campaigns.

    Indicators of Compromise (IOC) List

    Hash

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    Gurucul Threat Detection and Incident Response (TDIR) Queries for Detection

    Detection Query 1 :

    sha256hash IN ("55b3dc57929d8eacfdadc71d92483eabe4874bf3d0189f861b145705a0f0a8fe","ba86b6e0199b8907427364246f049efd67dc4eda0b5078f4bc7607253634cf24","b53069a380a9dd3dc1c758888d0e50dd43935f16df0f7124c77569375a9f44f5","c7726c166e1947fdbf808a50b75ca7400d56fa6fef2a76cefe314848db22c76c","498961237cf1c48f1e7764829818c5ba0af24a234c2f29c4420fb80276aec676","b90ef1d21523eeffbca17181ccccf269bca3840786fcbf5c73218c6e1d6a51a9","5b64786ed92545eeac013be9456e1ff03d95073910742e45ff6b88a86e91901b","e836873479ff558cfb885097e8783356aad1f2d30b69d825b3a71cb7a57cf930","ed5b920dad5dcd3f9e55828f82a27211a212839c8942531c288535b92df7f453","272c86c6db95f1ef8b83f672b65e64df16494cae261e1aba1aeb1e59dcb68524","ae93d9327a91e90bf7744c6ce0eb4affb3acb62a5d1b2dafd645cba9af28d795","ffc6c3805bbaef2c4003763fd5fac0ebcccf99a1656f10cf7677f6c2a5d16dbd","a54bcafd9d4ece87fa314d508a68f47b0ec3351c0a270aa2ed3a0e275b9db03c","958921ea0995482fb04ea4a50bbdb654f272ab991046a43c1fdbd22da302d544","edc1f7528ca93ec432daca820f47e08d218b79cceca1ee764966f8f90d6a58bd","53f1b841d323c211c715b8f80d0efb9529440caae921a60340de027052946dd9","aea13e5871b683a19a05015ff0369b412b985d47eb67a3af93f44400a026b4b0","bb4856a66bf7e0de18522e35798c0a8734179c1aab21ed2ad6821aaa99e1cb4c","cf8ebfd98da3025dc09d0b3bbeef874d8f9c4d4ba4937719f0a9a3aa04c81beb","4f4567abe9ff520797b04b04255bbbe07ecdddb594559d436ac53314ec62c1b3","68d9020aa9b509a6d018d6d9f4c77e7604a588b2848e05da6a4d9f82d725f91b","6d3586aa6603f1c1c79d7bd7e0b5c5f0cc8e8a84577c35d21b0f462656c2e1f9","33580073680016f23bf474e6e62c61bf6a776e561385bfb06788a4713114ba9d","defe25e400d4925d8a2bb4b1181044d06a8bf61688fd9c9ea59f1e0bb7bc21d8","29f89486bb820d40c9bee8bf70ee8664ea270b16e486af4a53ab703996943256","2c40e7cf613bf2806ff6e9bc396058fe4f85926493979189dbdbc7d615b7cb14","3b85d0261ab2531aba9e2992eb85273be0e26fe61e4592862d8f45d6807ceee4","54305c7b95d8105601461bb18de87f1f679d833f15e38a9ee7895a0c8605c0d0","5dee69127d501142413fb93fd2af8c8a378682c140c52b48990a5c41f2ce3616","867a05d67dd184d544d5513f4f07959a7c2b558197c99cb8139ea797ad9fbece","91e61fd77460393a89a8af657d09df6a815465f6ce22f1db8277d58342b32249","b2b62703a1ef7d9d3376c6b3609cd901cbccdcca80fba940ce8ed3f4e54cdbe6","cf35ce47b35f1405969f40633fcf35132ca3ccb3fdfded8cc270fc2223049b80","d981a16b9da1615514a02f5ebb38416a009f5621c0b718214d5b105c9f552389","ddd67dda5d58c7480152c9f6e8043c3ea7de2e593beedf86b867b83f005bf0cc","ea0869fa9d5e23bdd16cddfefbbf9c67744598f379be306ff652f910db1ba162","ef0e1bb2d389ab8b5f15d2f83cf978662e18e31dbe875f39db563e8a019af577","f3e5667d02f95c001c717dfc5a0e100d2b701be4ec35a3e6875dc276431a7497","f6761b5341a33188a7a1ca7a904d5866e07b8ddbde9adebdbce4306923cfc60a","fc2a6138786fae4e33dc343aea2b1a7cd6411187307ea2c82cd96b45f6d1f2a0","a97f460bfa612f1d406823620d0d25e381f9b980a0497e2775269917a7150f04","d418f878fa02729b38b5384bcb3216872a968f5d0c9c77609d8c5aacedb07546","8a7ee2a8e6b3476319a3a0d5846805fd25fa388c7f2215668bc134202ea093fa","3b47df790abb4eb3ac570b50bf96bb1943d4b46851430ebf3fc36f645061491b")

    Reference:

    https://cloud.google.com/blog/topics/threat-intelligence/exploiting-critical-winrar-vulnerability/


    Tags

    VulnerabilityThreat ActorAPTRussiaChinaCVE-2025ExploitWinRAR

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