SYMBOLCOMMON_NAMEaka. SYNONYMS
win.lockfile (Back to overview)

LockFile


A ransomware first observed in July 2021.

References
2022-06-23SecureworksCounter Threat Unit ResearchTeam
@online{researchteam:20220623:bronze:8bccd74, author = {Counter Threat Unit ResearchTeam}, title = {{BRONZE STARLIGHT Ransomware Operations Use HUI Loader}}, date = {2022-06-23}, organization = {Secureworks}, url = {https://www.secureworks.com/research/bronze-starlight-ransomware-operations-use-hui-loader}, language = {English}, urldate = {2022-09-20} } BRONZE STARLIGHT Ransomware Operations Use HUI Loader
ATOMSILO Cobalt Strike HUI Loader LockFile NightSky Pandora PlugX Quasar RAT Rook SodaMaster
2022-05-09MicrosoftMicrosoft 365 Defender Threat Intelligence Team, Microsoft Threat Intelligence Center (MSTIC)
@online{team:20220509:ransomwareasaservice:13ec472, author = {Microsoft 365 Defender Threat Intelligence Team and Microsoft Threat Intelligence Center (MSTIC)}, title = {{Ransomware-as-a-service: Understanding the cybercrime gig economy and how to protect yourself}}, date = {2022-05-09}, organization = {Microsoft}, url = {https://www.microsoft.com/security/blog/2022/05/09/ransomware-as-a-service-understanding-the-cybercrime-gig-economy-and-how-to-protect-yourself}, language = {English}, urldate = {2022-05-17} } Ransomware-as-a-service: Understanding the cybercrime gig economy and how to protect yourself
AnchorDNS BlackCat BlackMatter Conti DarkSide HelloKitty Hive LockBit REvil FAKEUPDATES Griffon ATOMSILO BazarBackdoor BlackCat BlackMatter Blister Cobalt Strike Conti DarkSide Emotet FiveHands Gozi HelloKitty Hive IcedID ISFB JSSLoader LockBit LockFile Maze NightSky Pandora Phobos Phoenix Locker PhotoLoader QakBot REvil Rook Ryuk SystemBC TrickBot WastedLocker BRONZE STARLIGHT
2022-04-20Bleeping ComputerBill Toulas
@online{toulas:20220420:microsoft:c1073df, author = {Bill Toulas}, title = {{Microsoft Exchange servers hacked to deploy Hive ransomware}}, date = {2022-04-20}, organization = {Bleeping Computer}, url = {https://www.bleepingcomputer.com/news/security/microsoft-exchange-servers-hacked-to-deploy-hive-ransomware/}, language = {English}, urldate = {2022-04-24} } Microsoft Exchange servers hacked to deploy Hive ransomware
Babuk BlackByte Conti Hive LockFile
2022-03-17SophosTilly Travers
@online{travers:20220317:ransomware:df38f2f, author = {Tilly Travers}, title = {{The Ransomware Threat Intelligence Center}}, date = {2022-03-17}, organization = {Sophos}, url = {https://news.sophos.com/en-us/2022/03/17/the-ransomware-threat-intelligence-center/}, language = {English}, urldate = {2022-03-18} } The Ransomware Threat Intelligence Center
ATOMSILO Avaddon AvosLocker BlackKingdom Ransomware BlackMatter Conti Cring DarkSide dearcry Dharma Egregor Entropy Epsilon Red Gandcrab Karma LockBit LockFile Mailto Maze Nefilim RagnarLocker Ragnarok REvil RobinHood Ryuk SamSam Snatch WannaCryptor WastedLocker
2021-10-27Avast DecodedAvast
@online{avast:20211027:avast:6b44ea1, author = {Avast}, title = {{Avast releases decryptor for AtomSilo and LockFile ransomware}}, date = {2021-10-27}, organization = {Avast Decoded}, url = {https://decoded.avast.io/threatintel/decryptor-for-atomsilo-and-lockfile-ransomware/}, language = {English}, urldate = {2021-11-08} } Avast releases decryptor for AtomSilo and LockFile ransomware
ATOMSILO LockFile
2021-09-26NSFOCUSJie Ji
@online{ji:20210926:insights:51c06b8, author = {Jie Ji}, title = {{Insights into Ransomware Spread Using Exchange 1-Day Vulnerabilities 1-2}}, date = {2021-09-26}, organization = {NSFOCUS}, url = {https://nsfocusglobal.com/insights-into-ransomware-spread-using-exchange-1-day-vulnerabilities-1-2/}, language = {English}, urldate = {2021-11-25} } Insights into Ransomware Spread Using Exchange 1-Day Vulnerabilities 1-2
Cobalt Strike LockFile
2021-08-30CSO OnlineLucian Constantin
@online{constantin:20210830:lockfile:f792736, author = {Lucian Constantin}, title = {{LockFile ransomware uses intermittent encryption to evade detection}}, date = {2021-08-30}, organization = {CSO Online}, url = {https://www.csoonline.com/article/3631517/lockfile-ransomware-uses-intermittent-encryption-to-evade-detection.html}, language = {English}, urldate = {2021-08-31} } LockFile ransomware uses intermittent encryption to evade detection
LockFile
2021-08-28The Hacker NewsRavie Lakshmanan
@online{lakshmanan:20210828:lockfile:aa9e07a, author = {Ravie Lakshmanan}, title = {{LockFile Ransomware Bypasses Protection Using Intermittent File Encryption}}, date = {2021-08-28}, organization = {The Hacker News}, url = {https://thehackernews.com/2021/08/lockfile-ransomware-bypasses-protection.html}, language = {English}, urldate = {2021-08-31} } LockFile Ransomware Bypasses Protection Using Intermittent File Encryption
LockFile
2021-08-27SophosMark Loman
@online{loman:20210827:lockfile:cc8483f, author = {Mark Loman}, title = {{LockFile ransomware’s box of tricks: intermittent encryption and evasion}}, date = {2021-08-27}, organization = {Sophos}, url = {https://news.sophos.com/en-us/2021/08/27/lockfile-ransomwares-box-of-tricks-intermittent-encryption-and-evasion/}, language = {English}, urldate = {2021-08-30} } LockFile ransomware’s box of tricks: intermittent encryption and evasion
LockFile
2021-08-25Cybleinccybleinc
@online{cybleinc:20210825:lockfile:0bc870f, author = {cybleinc}, title = {{​LockFile Ransomware: Exploiting Microsoft Exchange Vulnerabilities Using ProxyShell}}, date = {2021-08-25}, organization = {Cybleinc}, url = {https://blog.cyble.com/2021/08/25/lockfile-ransomware-using-proxyshell-attack-to-deploy-ransomware/}, language = {English}, urldate = {2021-08-31} } ​LockFile Ransomware: Exploiting Microsoft Exchange Vulnerabilities Using ProxyShell
LockFile
2021-08-23Sophos SecOpsGreg Iddon
@online{iddon:20210823:proxyshell:5568890, author = {Greg Iddon}, title = {{ProxyShell vulnerabilities in Microsoft Exchange: What to do}}, date = {2021-08-23}, organization = {Sophos SecOps}, url = {https://news.sophos.com/en-us/2021/08/23/proxyshell-vulnerabilities-in-microsoft-exchange-what-to-do/}, language = {English}, urldate = {2022-03-18} } ProxyShell vulnerabilities in Microsoft Exchange: What to do
LockFile
2021-08-20SymantecThreat Hunter Team
@online{team:20210820:lockfile:28cc466, author = {Threat Hunter Team}, title = {{LockFile: Ransomware Uses PetitPotam Exploit to Compromise Windows Domain Controllers}}, date = {2021-08-20}, organization = {Symantec}, url = {https://symantec-enterprise-blogs.security.com/blogs/threat-intelligence/lockfile-ransomware-new-petitpotam-windows}, language = {English}, urldate = {2021-08-24} } LockFile: Ransomware Uses PetitPotam Exploit to Compromise Windows Domain Controllers
LockFile
2021-08-20Twitter (@VirITeXplorer)TG Soft
@online{soft:20210820:about:dccc915, author = {TG Soft}, title = {{Tweet about LockFile attacks in Italy}}, date = {2021-08-20}, organization = {Twitter (@VirITeXplorer)}, url = {https://twitter.com/VirITeXplorer/status/1428750497872232459}, language = {English}, urldate = {2021-08-31} } Tweet about LockFile attacks in Italy
LockFile
Yara Rules
[TLP:WHITE] win_lockfile_auto (20230125 | Detects win.lockfile.)
rule win_lockfile_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.lockfile."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.lockfile"
        malpedia_rule_date = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { 4d03e5 488bf2 4c8d0401 488b4720 4c3bc1 4883d600 49f76668 }
            // n = 7, score = 200
            //   4d03e5               | jb                  0x638
            //   488bf2               | dec                 eax
            //   4c8d0401             | mov                 dword ptr [esp + 0x40], ebp
            //   488b4720             | dec                 eax
            //   4c3bc1               | mov                 eax, ebx
            //   4883d600             | dec                 eax
            //   49f76668             | sub                 eax, edx

        $sequence_1 = { 4c8d442438 498bd7 488d4c2440 488b442440 ff9000010000 90 488d4c2440 }
            // n = 7, score = 200
            //   4c8d442438           | dec                 eax
            //   498bd7               | mov                 dword ptr [edx], eax
            //   488d4c2440           | dec                 eax
            //   488b442440           | cmp                 eax, ecx
            //   ff9000010000         | jbe                 0x453
            //   90                   | mov                 ebx, 1
            //   488d4c2440           | cmp                 edi, ebx

        $sequence_2 = { 4883d100 4c3bde 4c8b5d9f 4883d100 4d3bf7 4f8d040b }
            // n = 6, score = 200
            //   4883d100             | xor                 ecx, esi
            //   4c3bde               | xor                 ecx, edx
            //   4c8b5d9f             | add                 ebx, 0x6ed9eba1
            //   4883d100             | inc                 ecx
            //   4d3bf7               | ror                 eax, 2
            //   4f8d040b             | add                 eax, ebx

        $sequence_3 = { 498bc7 4c89442450 4889542428 488955d8 4c8945e8 66660f1f840000000000 4c8921 }
            // n = 7, score = 200
            //   498bc7               | dec                 eax
            //   4c89442450           | lea                 eax, [0x36eba]
            //   4889542428           | dec                 eax
            //   488955d8             | mov                 dword ptr [esp + 0x48], ebx
            //   4c8945e8             | dec                 eax
            //   66660f1f840000000000     | lea    ecx, [esp + 0x30]
            //   4c8921               | dec                 eax

        $sequence_4 = { 75f0 85ff 0f840d020000 3bcf 0f83d3000000 498bd7 488bcd }
            // n = 7, score = 200
            //   75f0                 | mov                 dword ptr [ebp + 0x60], eax
            //   85ff                 | xor                 edi, edi
            //   0f840d020000         | dec                 eax
            //   3bcf                 | mov                 dword ptr [ebp - 0x10], eax
            //   0f83d3000000         | inc                 ecx
            //   498bd7               | mov                 eax, 0x104
            //   488bcd               | dec                 eax

        $sequence_5 = { 488bdd 48c1fb02 488bd3 488d4c2428 e8???????? 4889442428 488d1c98 }
            // n = 7, score = 200
            //   488bdd               | dec                 ecx
            //   48c1fb02             | mov                 eax, dword ptr [edi]
            //   488bd3               | dec                 esp
            //   488d4c2428           | mov                 eax, dword ptr [ebp + 0x77]
            //   e8????????           |                     
            //   4889442428           | dec                 eax
            //   488d1c98             | add                 edx, dword ptr [esi + 8]

        $sequence_6 = { 418bcd 498b442420 49f721 4c8be2 4d8d0c00 4d3bc8 4d13e5 }
            // n = 7, score = 200
            //   418bcd               | inc                 ecx
            //   498b442420           | movups              xmm0, xmmword ptr [ecx + eax*8]
            //   49f721               | dec                 eax
            //   4c8be2               | lea                 edx, [0x1d003]
            //   4d8d0c00             | movsd               xmm2, qword ptr [edx + eax*8]
            //   4d3bc8               | addsd               xmm2, xmm5
            //   4d13e5               | subsd               xmm5, xmm1

        $sequence_7 = { 488bfa 33c0 f348ab 488bca e8???????? 90 4c8d45d8 }
            // n = 7, score = 200
            //   488bfa               | lea                 edx, [0x66039]
            //   33c0                 | dec                 eax
            //   f348ab               | mov                 ecx, ebx
            //   488bca               | mov                 byte ptr [ebx + 0xb], 0
            //   e8????????           |                     
            //   90                   | dec                 eax
            //   4c8d45d8             | lea                 eax, [esp + 0x30]

        $sequence_8 = { 4c3bfb 72d6 4c8bb42490000000 4c8bbc2480000000 488b742430 4c8bef 483bfb }
            // n = 7, score = 200
            //   4c3bfb               | mov                 ecx, dword ptr [esi + 8]
            //   72d6                 | dec                 eax
            //   4c8bb42490000000     | sub                 ecx, edi
            //   4c8bbc2480000000     | dec                 eax
            //   488b742430           | mov                 eax, ebx
            //   4c8bef               | dec                 eax
            //   483bfb               | imul                ecx

        $sequence_9 = { 0430 346c 88442474 8b442440 0431 3420 88442475 }
            // n = 7, score = 200
            //   0430                 | mov                 eax, dword ptr [esp + 0x40]
            //   346c                 | add                 al, 0x18
            //   88442474             | mov                 eax, dword ptr [esp + 0x40]
            //   8b442440             | add                 al, 0x17
            //   0431                 | xor                 al, 0x65
            //   3420                 | mov                 byte ptr [esp + 0x5b], al
            //   88442475             | mov                 eax, dword ptr [esp + 0x40]

    condition:
        7 of them and filesize < 1163264
}
Download all Yara Rules