SYMBOLCOMMON_NAMEaka. SYNONYMS
win.locky (Back to overview)

Locky

Actor(s): TA505

URLhaus    

Locky is a high profile ransomware family that first appeared in early 2016 and was observed being active until end of 2017. It encrypts files on the victim system and asks for ransom in order to have back original files. In its first version it added a .locky extension to the encrypted files, and in recent versions it added the .lukitus extension. The ransom amount is defined in BTC and depends on the actor.

References
2020-08-20CERT-FRCERT-FR
@techreport{certfr:20200820:development:d518522, author = {CERT-FR}, title = {{Development of the Activity of the TA505 Cybercriminal Group}}, date = {2020-08-20}, institution = {CERT-FR}, url = {https://www.cert.ssi.gouv.fr/uploads/CERTFR-2020-CTI-009.pdf}, language = {English}, urldate = {2020-08-28} } Development of the Activity of the TA505 Cybercriminal Group
AndroMut Bart Clop Dridex FlawedAmmyy FlawedGrace Get2 Locky Marap QuantLoader SDBbot ServHelper tRat TrickBot
2020-07-29ESET Researchwelivesecurity
@techreport{welivesecurity:20200729:threat:496355c, author = {welivesecurity}, title = {{THREAT REPORT Q2 2020}}, date = {2020-07-29}, institution = {ESET Research}, url = {https://www.welivesecurity.com/wp-content/uploads/2020/07/ESET_Threat_Report_Q22020.pdf}, language = {English}, urldate = {2020-07-30} } THREAT REPORT Q2 2020
DEFENSOR ID HiddenAd Bundlore Pirrit Agent.BTZ Cerber ClipBanker CROSSWALK Cryptowall CTB Locker DanaBot Dharma Formbook Gandcrab Grandoreiro Houdini ISFB LockBit Locky Mailto Maze Microcin Nemty NjRAT Phobos Ransomware PlugX Pony REvil Socelars STOP Ransomware Tinba TrickBot WannaCryptor
2020-06-22CERT-FRCERT-FR
@techreport{certfr:20200622:volution:fba1cfa, author = {CERT-FR}, title = {{Évolution De Lactivité du Groupe Cybercriminel TA505}}, date = {2020-06-22}, institution = {CERT-FR}, url = {https://www.cert.ssi.gouv.fr/uploads/CERTFR-2020-CTI-006.pdf}, language = {French}, urldate = {2020-06-24} } Évolution De Lactivité du Groupe Cybercriminel TA505
Amadey AndroMut Bart Clop Dridex FlawedGrace Gandcrab Get2 GlobeImposter Jaff Locky Marap Philadephia Ransom QuantLoader Scarab Ransomware SDBbot ServHelper Silence tRat TrickBot
2020-05-21Intel 471Intel 471
@online{471:20200521:brief:048d164, author = {Intel 471}, title = {{A brief history of TA505}}, date = {2020-05-21}, organization = {Intel 471}, url = {https://blog.intel471.com/2020/05/21/a-brief-history-of-ta505/}, language = {English}, urldate = {2020-05-23} } A brief history of TA505
AndroMut Bart Dridex FlawedAmmyy FlawedGrace Gandcrab Get2 GlobeImposter Jaff Kegotip Locky Necurs Philadephia Ransom Pony QuantLoader Rockloader SDBbot ServHelper Shifu Snatch TrickBot
2020-05-18ThreatpostTara Seals
@online{seals:20200518:ransomware:265e1f4, author = {Tara Seals}, title = {{Ransomware Gang Arrested for Spreading Locky to Hospitals}}, date = {2020-05-18}, organization = {Threatpost}, url = {https://threatpost.com/ransomware-gang-arrested-locky-hospitals/155842/}, language = {English}, urldate = {2020-07-06} } Ransomware Gang Arrested for Spreading Locky to Hospitals
Locky
2020-02-10viXraJason Reaves
@techreport{reaves:20200210:case:3f668be, author = {Jason Reaves}, title = {{A Case Study into solving Crypters/Packers in Malware Obfuscation using an SMT approach}}, date = {2020-02-10}, institution = {viXra}, url = {https://vixra.org/pdf/2002.0183v1.pdf}, language = {English}, urldate = {2020-02-27} } A Case Study into solving Crypters/Packers in Malware Obfuscation using an SMT approach
Locky
2019-09-09McAfeeThomas Roccia, Marc Rivero López, Chintan Shah
@online{roccia:20190909:evolution:baf3b6c, author = {Thomas Roccia and Marc Rivero López and Chintan Shah}, title = {{Evolution of Malware Sandbox Evasion Tactics – A Retrospective Study}}, date = {2019-09-09}, organization = {McAfee}, url = {https://www.mcafee.com/blogs/other-blogs/mcafee-labs/evolution-of-malware-sandbox-evasion-tactics-a-retrospective-study/}, language = {English}, urldate = {2020-08-30} } Evolution of Malware Sandbox Evasion Tactics – A Retrospective Study
Cutwail Dridex Dyre Kovter Locky Phorpiex Simda
2019-07-30Dissecting MalwareMarius Genheimer
@online{genheimer:20190730:picking:cea78ea, author = {Marius Genheimer}, title = {{Picking Locky}}, date = {2019-07-30}, organization = {Dissecting Malware}, url = {https://dissectingmalwa.re/picking-locky.html}, language = {English}, urldate = {2020-03-27} } Picking Locky
Locky
2018-03-20StormshieldMehdi Talbi
@online{talbi:20180320:deobfuscating:7ac7605, author = {Mehdi Talbi}, title = {{De-obfuscating Jump Chains with Binary Ninja}}, date = {2018-03-20}, organization = {Stormshield}, url = {https://thisissecurity.stormshield.com/2018/03/20/de-obfuscating-jump-chains-with-binary-ninja/}, language = {English}, urldate = {2020-03-16} } De-obfuscating Jump Chains with Binary Ninja
Locky
2017-11-07ThreatVectorCylance Threat Research Team
@online{team:20171107:locky:a38e9b5, author = {Cylance Threat Research Team}, title = {{Locky Ransomware}}, date = {2017-11-07}, organization = {ThreatVector}, url = {https://www.cylance.com/en_us/blog/threat-spotlight-locky-ransomware.html}, language = {English}, urldate = {2020-01-07} } Locky Ransomware
Locky
2017-08-16Bleeping ComputerLawrence Abrams
@online{abrams:20170816:locky:7445bd0, author = {Lawrence Abrams}, title = {{Locky Ransomware switches to the Lukitus extension for Encrypted Files}}, date = {2017-08-16}, organization = {Bleeping Computer}, url = {https://www.bleepingcomputer.com/news/security/locky-ransomware-switches-to-the-lukitus-extension-for-encrypted-files/}, language = {English}, urldate = {2019-12-20} } Locky Ransomware switches to the Lukitus extension for Encrypted Files
Locky
2017-08-10botfrei BlogTom Berchem
@online{berchem:20170810:weltweite:5df6bfa, author = {Tom Berchem}, title = {{Weltweite Spamwelle verbreitet teuflische Variante des Locky}}, date = {2017-08-10}, organization = {botfrei Blog}, url = {https://blog.botfrei.de/2017/08/weltweite-spamwelle-verbreitet-teufliche-variante-des-locky/}, language = {German}, urldate = {2019-12-10} } Weltweite Spamwelle verbreitet teuflische Variante des Locky
Locky
2017-07-18ElasticAshkan Hosseini
@online{hosseini:20170718:ten:af036b3, author = {Ashkan Hosseini}, title = {{Ten process injection techniques: A technical survey of common and trending process injection techniques}}, date = {2017-07-18}, organization = {Elastic}, url = {https://www.elastic.co/blog/ten-process-injection-techniques-technical-survey-common-and-trending-process}, language = {English}, urldate = {2020-07-15} } Ten process injection techniques: A technical survey of common and trending process injection techniques
Cryakl CyberGate Dridex FinFisher RAT Locky
2017-06-22Bleeping ComputerCatalin Cimpanu
@online{cimpanu:20170622:locky:4a088f0, author = {Catalin Cimpanu}, title = {{Locky Ransomware Returns, but Targets Only Windows XP & Vista}}, date = {2017-06-22}, organization = {Bleeping Computer}, url = {https://www.bleepingcomputer.com/news/security/locky-ransomware-returns-but-targets-only-windows-xp-and-vista/}, language = {English}, urldate = {2019-12-20} } Locky Ransomware Returns, but Targets Only Windows XP & Vista
Locky
2017-06-21CiscoAlex Chiu, Warren Mercer, Jaeson Schultz, Sean Baird, Matthew Molyett
@online{chiu:20170621:player:b44064a, author = {Alex Chiu and Warren Mercer and Jaeson Schultz and Sean Baird and Matthew Molyett}, title = {{Player 1 Limps Back Into the Ring - Hello again, Locky!}}, date = {2017-06-21}, organization = {Cisco}, url = {http://blog.talosintelligence.com/2017/06/necurs-locky-campaign.html}, language = {English}, urldate = {2019-12-17} } Player 1 Limps Back Into the Ring - Hello again, Locky!
Locky
2017-01-31MalwarebytesMalwarebytes Labs
@online{labs:20170131:locky:92db484, author = {Malwarebytes Labs}, title = {{Locky Bart ransomware and backend server analysis}}, date = {2017-01-31}, organization = {Malwarebytes}, url = {https://blog.malwarebytes.com/threat-analysis/2017/01/locky-bart-ransomware-and-backend-server-analysis/}, language = {English}, urldate = {2019-12-20} } Locky Bart ransomware and backend server analysis
Locky
2016-07-07Pierluigi Paganini
@online{paganini:20160707:new:7c765a2, author = {Pierluigi Paganini}, title = {{New threat dubbed Zepto Ransomware is spreading out with a new email spam campaign. It is a variant of the recent Locky Ransomware.}}, date = {2016-07-07}, url = {http://securityaffairs.co/wordpress/49094/malware/zepto-ransomware.html}, language = {English}, urldate = {2019-11-22} } New threat dubbed Zepto Ransomware is spreading out with a new email spam campaign. It is a variant of the recent Locky Ransomware.
Locky
2016-03-01Malwarebyteshasherezade
@online{hasherezade:20160301:look:fe35696, author = {hasherezade}, title = {{Look Into Locky Ransomware}}, date = {2016-03-01}, organization = {Malwarebytes}, url = {https://blog.malwarebytes.com/threat-analysis/2016/03/look-into-locky/}, language = {English}, urldate = {2019-12-20} } Look Into Locky Ransomware
Locky
Yara Rules
[TLP:WHITE] win_locky_auto (20201014 | autogenerated rule brought to you by yara-signator)
rule win_locky_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.locky"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { c1fe03 3b0d???????? 7510 e8???????? }
            // n = 4, score = 2100
            //   c1fe03               | sar                 esi, 3
            //   3b0d????????         |                     
            //   7510                 | jne                 0x12
            //   e8????????           |                     

        $sequence_1 = { e9???????? 8db578ffffff e9???????? 8d75b8 }
            // n = 4, score = 2100
            //   e9????????           |                     
            //   8db578ffffff         | lea                 esi, [ebp - 0x88]
            //   e9????????           |                     
            //   8d75b8               | lea                 esi, [ebp - 0x48]

        $sequence_2 = { 85c0 740c 83f8ff 7407 50 ff15???????? 8b07 }
            // n = 7, score = 2100
            //   85c0                 | test                eax, eax
            //   740c                 | je                  0xe
            //   83f8ff               | cmp                 eax, -1
            //   7407                 | je                  9
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8b07                 | mov                 eax, dword ptr [edi]

        $sequence_3 = { 52 51 e8???????? 8b4df4 }
            // n = 4, score = 2100
            //   52                   | push                edx
            //   51                   | push                ecx
            //   e8????????           |                     
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]

        $sequence_4 = { 8b45d4 5e 3975e8 7303 8d45d4 6880000000 50 }
            // n = 7, score = 2100
            //   8b45d4               | mov                 eax, dword ptr [ebp - 0x2c]
            //   5e                   | pop                 esi
            //   3975e8               | cmp                 dword ptr [ebp - 0x18], esi
            //   7303                 | jae                 5
            //   8d45d4               | lea                 eax, [ebp - 0x2c]
            //   6880000000           | push                0x80
            //   50                   | push                eax

        $sequence_5 = { 66890e 56 8d8de8fbffff e8???????? 8bc6 c9 }
            // n = 6, score = 2100
            //   66890e               | mov                 word ptr [esi], cx
            //   56                   | push                esi
            //   8d8de8fbffff         | lea                 ecx, [ebp - 0x418]
            //   e8????????           |                     
            //   8bc6                 | mov                 eax, esi
            //   c9                   | leave               

        $sequence_6 = { eb1b 8b461c 8b4f1c 3bc8 7c0e 7f3b 8bcb }
            // n = 7, score = 2100
            //   eb1b                 | jmp                 0x1d
            //   8b461c               | mov                 eax, dword ptr [esi + 0x1c]
            //   8b4f1c               | mov                 ecx, dword ptr [edi + 0x1c]
            //   3bc8                 | cmp                 ecx, eax
            //   7c0e                 | jl                  0x10
            //   7f3b                 | jg                  0x3d
            //   8bcb                 | mov                 ecx, ebx

        $sequence_7 = { c20400 55 8bec 51 51 8b00 6a00 }
            // n = 7, score = 2100
            //   c20400               | ret                 4
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   51                   | push                ecx
            //   51                   | push                ecx
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   6a00                 | push                0

        $sequence_8 = { 03d3 5b c21000 e9???????? }
            // n = 4, score = 1400
            //   03d3                 | add                 edx, ebx
            //   5b                   | pop                 ebx
            //   c21000               | ret                 0x10
            //   e9????????           |                     

        $sequence_9 = { 8d09 e9???????? 90 8d12 e9???????? }
            // n = 5, score = 700
            //   8d09                 | lea                 ecx, [ecx]
            //   e9????????           |                     
            //   90                   | nop                 
            //   8d12                 | lea                 edx, [edx]
            //   e9????????           |                     

        $sequence_10 = { 90 e9???????? 8d12 e9???????? 50 }
            // n = 5, score = 700
            //   90                   | nop                 
            //   e9????????           |                     
            //   8d12                 | lea                 edx, [edx]
            //   e9????????           |                     
            //   50                   | push                eax

        $sequence_11 = { 8d12 e9???????? 90 8d00 }
            // n = 4, score = 700
            //   8d12                 | lea                 edx, [edx]
            //   e9????????           |                     
            //   90                   | nop                 
            //   8d00                 | lea                 eax, [eax]

        $sequence_12 = { 90 89e5 90 eb08 }
            // n = 4, score = 700
            //   90                   | nop                 
            //   89e5                 | mov                 ebp, esp
            //   90                   | nop                 
            //   eb08                 | jmp                 0xa

        $sequence_13 = { 8d1b 90 e9???????? 90 89c8 90 }
            // n = 6, score = 700
            //   8d1b                 | lea                 ebx, [ebx]
            //   90                   | nop                 
            //   e9????????           |                     
            //   90                   | nop                 
            //   89c8                 | mov                 eax, ecx
            //   90                   | nop                 

        $sequence_14 = { 5e c21000 8bff 55 8bec 33c0 8b4d08 }
            // n = 7, score = 700
            //   5e                   | pop                 esi
            //   c21000               | ret                 0x10
            //   8bff                 | mov                 edi, edi
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   33c0                 | xor                 eax, eax
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]

        $sequence_15 = { 90 6a73 90 e9???????? 90 }
            // n = 5, score = 700
            //   90                   | nop                 
            //   6a73                 | push                0x73
            //   90                   | nop                 
            //   e9????????           |                     
            //   90                   | nop                 

        $sequence_16 = { 8d3f 90 e9???????? 90 6a61 90 }
            // n = 6, score = 700
            //   8d3f                 | lea                 edi, [edi]
            //   90                   | nop                 
            //   e9????????           |                     
            //   90                   | nop                 
            //   6a61                 | push                0x61
            //   90                   | nop                 

    condition:
        7 of them and filesize < 1122304
}
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