SYMBOLCOMMON_NAMEaka. SYNONYMS
win.suncrypt (Back to overview)

SunCrypt


According to PCrisk, Suncrypt ransomware prevents victims from accessing files by encryption. It also renames all encrypted files and creates a ransom message. It renames encrypted files by appending a string of random characters as the new extension.

References
2022-07-27Trend MicroBuddy Tancio, Jed Valderama
@online{tancio:20220727:gootkit:f1c63fa, author = {Buddy Tancio and Jed Valderama}, title = {{Gootkit Loader’s Updated Tactics and Fileless Delivery of Cobalt Strike}}, date = {2022-07-27}, organization = {Trend Micro}, url = {https://www.trendmicro.com/en_us/research/22/g/gootkit-loaders-updated-tactics-and-fileless-delivery-of-cobalt-strike.html}, language = {English}, urldate = {2022-07-29} } Gootkit Loader’s Updated Tactics and Fileless Delivery of Cobalt Strike
Cobalt Strike GootKit Kronos REvil SunCrypt
2022-04-12LIFARSVlad Pasca
@techreport{pasca:20220412:detailed:132144b, author = {Vlad Pasca}, title = {{A Detailed Analysis of The SunCrypt Ransomware}}, date = {2022-04-12}, institution = {LIFARS}, url = {https://cdn.pathfactory.com/assets/10555/contents/394789/0dd521f8-aa64-4517-834e-bc852e9ab95d.pdf}, language = {English}, urldate = {2022-04-24} } A Detailed Analysis of The SunCrypt Ransomware
SunCrypt
2022-04-01Bleeping ComputerLawrence Abrams
@online{abrams:20220401:week:14d9669, author = {Lawrence Abrams}, title = {{The Week in Ransomware - April 1st 2022 - 'I can fight with a keyboard'}}, date = {2022-04-01}, organization = {Bleeping Computer}, url = {https://www.bleepingcomputer.com/news/security/the-week-in-ransomware-april-1st-2022-i-can-fight-with-a-keyboard/}, language = {English}, urldate = {2022-04-05} } The Week in Ransomware - April 1st 2022 - 'I can fight with a keyboard'
Hive Dharma LockBit STOP SunCrypt
2022-03-28Bleeping ComputerBill Toulas
@online{toulas:20220328:suncrypt:27f9b79, author = {Bill Toulas}, title = {{SunCrypt ransomware is still alive and kicking in 2022}}, date = {2022-03-28}, organization = {Bleeping Computer}, url = {https://www.bleepingcomputer.com/news/security/suncrypt-ransomware-is-still-alive-and-kicking-in-2022/}, language = {English}, urldate = {2022-03-29} } SunCrypt ransomware is still alive and kicking in 2022
SunCrypt
2022-03-28Minerva LabsNatalie Zargarov
@online{zargarov:20220328:suncrypt:123d4d5, author = {Natalie Zargarov}, title = {{SunCrypt Ransomware Gains New Capabilities in 2022}}, date = {2022-03-28}, organization = {Minerva Labs}, url = {https://blog.minerva-labs.com/suncrypt-ransomware-gains-new-abilities-in-2022}, language = {English}, urldate = {2022-03-29} } SunCrypt Ransomware Gains New Capabilities in 2022
SunCrypt
2021-09-09Medium s2wlabS2W TALON
@online{talon:20210909:case:fdbe983, author = {S2W TALON}, title = {{Case Analysis of Suncrypt Ransomware Negotiation and Bitcoin Transaction}}, date = {2021-09-09}, organization = {Medium s2wlab}, url = {https://medium.com/s2wlab/case-analysis-of-suncrypt-ransomware-negotiation-and-bitcoin-transaction-43a2194ac0bc}, language = {English}, urldate = {2021-09-12} } Case Analysis of Suncrypt Ransomware Negotiation and Bitcoin Transaction
SunCrypt
2021-07-22S2W LAB Inc.Denise Dasom Kim, Jungyeon Lim, Yeonghyeon Jeong, Sujin Lim
@online{kim:20210722:w4:c901bea, author = {Denise Dasom Kim and Jungyeon Lim and Yeonghyeon Jeong and Sujin Lim}, title = {{W4 July | EN | Story of the week: Ransomware on the Darkweb}}, date = {2021-07-22}, organization = {S2W LAB Inc.}, url = {https://medium.com/s2wlab/w4-july-en-story-of-the-week-ransomware-on-the-darkweb-c61965d0386a}, language = {English}, urldate = {2021-07-26} } W4 July | EN | Story of the week: Ransomware on the Darkweb
LockBit SunCrypt
2021-05-10DarkTracerDarkTracer
@online{darktracer:20210510:intelligence:b9d1c3f, author = {DarkTracer}, title = {{Intelligence Report on Ransomware Gangs on the DarkWeb: List of victim organizations attacked by ransomware gangs released on the DarkWeb}}, date = {2021-05-10}, organization = {DarkTracer}, url = {https://docs.google.com/spreadsheets/d/1MI8Z2tBhmqQ5X8Wf_ozv3dVjz5sJOs-3}, language = {English}, urldate = {2021-05-13} } Intelligence Report on Ransomware Gangs on the DarkWeb: List of victim organizations attacked by ransomware gangs released on the DarkWeb
RansomEXX Avaddon Babuk Clop Conti Cuba DarkSide DoppelPaymer Egregor Hades LockBit Mailto Maze MedusaLocker Mespinoza Mount Locker Nefilim Nemty Pay2Key PwndLocker RagnarLocker Ragnarok RansomEXX REvil Sekhmet SunCrypt ThunderX
2021-04-26CoveWareCoveWare
@online{coveware:20210426:ransomware:12586d5, author = {CoveWare}, title = {{Ransomware Attack Vectors Shift as New Software Vulnerability Exploits Abound}}, date = {2021-04-26}, organization = {CoveWare}, url = {https://www.coveware.com/blog/ransomware-attack-vectors-shift-as-new-software-vulnerability-exploits-abound}, language = {English}, urldate = {2021-05-13} } Ransomware Attack Vectors Shift as New Software Vulnerability Exploits Abound
Avaddon Clop Conti DarkSide Egregor LockBit Mailto Phobos REvil Ryuk SunCrypt
2021-04-07ANALYST1Jon DiMaggio
@online{dimaggio:20210407:ransom:a109d6f, author = {Jon DiMaggio}, title = {{Ransom Mafia - Analysis of the World's First Ransomware Cartel}}, date = {2021-04-07}, organization = {ANALYST1}, url = {https://analyst1.com/blog/ransom-mafia-analysis-of-the-worlds-first-ransomware-cartel}, language = {English}, urldate = {2021-06-01} } Ransom Mafia - Analysis of the World's First Ransomware Cartel
Conti Egregor LockBit Maze RagnarLocker SunCrypt VIKING SPIDER
2021-04-07ANALYST1Jon DiMaggio
@techreport{dimaggio:20210407:ransom:a543eac, author = {Jon DiMaggio}, title = {{Ransom Mafia Analysis of the World's First Ransomware Cartel}}, date = {2021-04-07}, institution = {ANALYST1}, url = {https://analyst1.com/file-assets/RANSOM-MAFIA-ANALYSIS-OF-THE-WORLD%E2%80%99S-FIRST-RANSOMWARE-CARTEL.pdf}, language = {English}, urldate = {2021-04-09} } Ransom Mafia Analysis of the World's First Ransomware Cartel
Conti Egregor LockBit Maze RagnarLocker Ryuk SunCrypt TA2101 VIKING SPIDER
2021-03-28PC's Xcetra SupportDavid Ledbetter
@online{ledbetter:20210328:suncrypt:121d53e, author = {David Ledbetter}, title = {{SunCrypt, PowerShell obfuscation, shellcode and more yara}}, date = {2021-03-28}, organization = {PC's Xcetra Support}, url = {https://pcsxcetrasupport3.wordpress.com/2021/03/28/suncrypt-powershell-obfuscation-shellcode-and-more-yara/}, language = {English}, urldate = {2021-03-31} } SunCrypt, PowerShell obfuscation, shellcode and more yara
SunCrypt
2021-03-02IntezerJoakim Kennedy
@online{kennedy:20210302:when:b33af31, author = {Joakim Kennedy}, title = {{When Viruses Mutate: Did SunCrypt Ransomware Evolve from QNAPCrypt?}}, date = {2021-03-02}, organization = {Intezer}, url = {https://www.intezer.com/blog/malware-analysis/when-viruses-mutate-did-suncrypt-ransomware-evolve-from-qnapcrypt}, language = {English}, urldate = {2021-03-04} } When Viruses Mutate: Did SunCrypt Ransomware Evolve from QNAPCrypt?
QNAPCrypt SunCrypt
2021-02-23CrowdStrikeCrowdStrike
@techreport{crowdstrike:20210223:2021:bf5bc4f, author = {CrowdStrike}, title = {{2021 Global Threat Report}}, date = {2021-02-23}, institution = {CrowdStrike}, url = {https://go.crowdstrike.com/rs/281-OBQ-266/images/Report2021GTR.pdf}, language = {English}, urldate = {2021-02-25} } 2021 Global Threat Report
RansomEXX Amadey Anchor Avaddon BazarBackdoor Clop Cobalt Strike Conti Cutwail DanaBot DarkSide DoppelPaymer Dridex Egregor Emotet Hakbit IcedID JSOutProx KerrDown LockBit Mailto Maze MedusaLocker Mespinoza Mount Locker NedDnLoader Nemty Pay2Key PlugX Pushdo PwndLocker PyXie QakBot Quasar RAT RagnarLocker Ragnarok RansomEXX REvil Ryuk Sekhmet ShadowPad SmokeLoader Snake SUNBURST SunCrypt TEARDROP TrickBot WastedLocker Winnti Zloader KNOCKOUT SPIDER OUTLAW SPIDER RIDDLE SPIDER SOLAR SPIDER VIKING SPIDER
2021-02-04ChainanalysisChainalysis Team
@online{team:20210204:blockchain:4e63b2f, author = {Chainalysis Team}, title = {{Blockchain Analysis Shows Connections Between Four of 2020’s Biggest Ransomware Strains}}, date = {2021-02-04}, organization = {Chainanalysis}, url = {https://blog.chainalysis.com/reports/ransomware-connections-maze-egregor-suncrypt-doppelpaymer}, language = {English}, urldate = {2021-02-06} } Blockchain Analysis Shows Connections Between Four of 2020’s Biggest Ransomware Strains
DoppelPaymer Egregor Maze SunCrypt
2020-12-16AccenturePaul Mansfield
@online{mansfield:20201216:tracking:25540bd, author = {Paul Mansfield}, title = {{Tracking and combatting an evolving danger: Ransomware extortion}}, date = {2020-12-16}, organization = {Accenture}, url = {https://www.accenture.com/us-en/blogs/cyber-defense/evolving-danger-ransomware-extortion}, language = {English}, urldate = {2020-12-17} } Tracking and combatting an evolving danger: Ransomware extortion
DarkSide Egregor Maze Nefilim RagnarLocker REvil Ryuk SunCrypt
2020-11-16Intel 471Intel 471
@online{471:20201116:ransomwareasaservice:11a5a8b, author = {Intel 471}, title = {{Ransomware-as-a-service: The pandemic within a pandemic}}, date = {2020-11-16}, organization = {Intel 471}, url = {https://public.intel471.com/blog/ransomware-as-a-service-2020-ryuk-maze-revil-egregor-doppelpaymer/}, language = {English}, urldate = {2020-11-17} } Ransomware-as-a-service: The pandemic within a pandemic
Avaddon Clop Conti DoppelPaymer Egregor Hakbit Mailto Maze Mespinoza RagnarLocker REvil Ryuk SunCrypt ThunderX
2020-11-12Medium Sapphirex00Sapphire
@online{sapphire:20201112:diving:6b388eb, author = {Sapphire}, title = {{Diving into the Sun — SunCrypt: A new neighbour in the ransomware mafia}}, date = {2020-11-12}, organization = {Medium Sapphirex00}, url = {https://medium.com/@sapphirex00/diving-into-the-sun-suncrypt-a-new-neighbour-in-the-ransomware-mafia-d89010c9df83}, language = {English}, urldate = {2020-11-23} } Diving into the Sun — SunCrypt: A new neighbour in the ransomware mafia
SunCrypt
2020-10-23HornetsecurityHornetsecurity Security Lab
@online{lab:20201023:leakwareransomwarehybrid:ae1de8e, author = {Hornetsecurity Security Lab}, title = {{Leakware-Ransomware-Hybrid Attacks}}, date = {2020-10-23}, organization = {Hornetsecurity}, url = {https://www.hornetsecurity.com/en/security-informationen-en/leakware-ransomware-hybrid-attacks/}, language = {English}, urldate = {2020-12-08} } Leakware-Ransomware-Hybrid Attacks
Avaddon Clop Conti DarkSide DoppelPaymer Mailto Maze Mespinoza Nefilim RagnarLocker REvil Sekhmet SunCrypt
2020-10-08TesorionGijs Rijnders
@online{rijnders:20201008:shining:f05b53d, author = {Gijs Rijnders}, title = {{Shining a light on SunCrypt’s curious file encryption mechanism}}, date = {2020-10-08}, organization = {Tesorion}, url = {https://www.tesorion.nl/en/posts/shining-a-light-on-suncrypts-curious-file-encryption-mechanism/}, language = {English}, urldate = {2022-04-07} } Shining a light on SunCrypt’s curious file encryption mechanism
SunCrypt
2020-10-01KELAVictoria Kivilevich
@online{kivilevich:20201001:to:fd3aa09, author = {Victoria Kivilevich}, title = {{To Attack or Not to Attack: Targeting the Healthcare Sector in the Underground Ecosystem}}, date = {2020-10-01}, organization = {KELA}, url = {https://ke-la.com/to-attack-or-not-to-attack-targeting-the-healthcare-sector-in-the-underground-ecosystem/}, language = {English}, urldate = {2021-05-07} } To Attack or Not to Attack: Targeting the Healthcare Sector in the Underground Ecosystem
Conti DoppelPaymer Mailto Maze REvil Ryuk SunCrypt
2020-09-29PWC UKAndy Auld
@online{auld:20200929:whats:2782a62, author = {Andy Auld}, title = {{What's behind the increase in ransomware attacks this year?}}, date = {2020-09-29}, organization = {PWC UK}, url = {https://www.pwc.co.uk/issues/cyber-security-services/insights/what-is-behind-ransomware-attacks-increase.html}, language = {English}, urldate = {2021-05-25} } What's behind the increase in ransomware attacks this year?
DarkSide Avaddon Clop Conti DoppelPaymer Dridex Emotet FriedEx Mailto PwndLocker QakBot REvil Ryuk SMAUG SunCrypt TrickBot WastedLocker
2020-08-26Bleeping ComputerLawrence Abrams
@online{abrams:20200826:suncrypt:426964e, author = {Lawrence Abrams}, title = {{SunCrypt Ransomware sheds light on the Maze ransomware cartel}}, date = {2020-08-26}, organization = {Bleeping Computer}, url = {https://www.bleepingcomputer.com/news/security/suncrypt-ransomware-sheds-light-on-the-maze-ransomware-cartel/}, language = {English}, urldate = {2020-08-27} } SunCrypt Ransomware sheds light on the Maze ransomware cartel
SunCrypt
Yara Rules
[TLP:WHITE] win_suncrypt_auto (20230715 | Detects win.suncrypt.)
rule win_suncrypt_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.suncrypt."
        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.suncrypt"
        malpedia_rule_date = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 5d c3 33c0 b901000000 50 51 56 }
            // n = 7, score = 200
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   33c0                 | xor                 eax, eax
            //   b901000000           | mov                 ecx, 1
            //   50                   | push                eax
            //   51                   | push                ecx
            //   56                   | push                esi

        $sequence_1 = { 894de4 33ce c1c108 894dcc 03ca 8b55f4 8bd9 }
            // n = 7, score = 200
            //   894de4               | mov                 dword ptr [ebp - 0x1c], ecx
            //   33ce                 | xor                 ecx, esi
            //   c1c108               | rol                 ecx, 8
            //   894dcc               | mov                 dword ptr [ebp - 0x34], ecx
            //   03ca                 | add                 ecx, edx
            //   8b55f4               | mov                 edx, dword ptr [ebp - 0xc]
            //   8bd9                 | mov                 ebx, ecx

        $sequence_2 = { 8945ac 89856cffffff 8d0c02 8bc7 33c1 }
            // n = 5, score = 200
            //   8945ac               | mov                 dword ptr [ebp - 0x54], eax
            //   89856cffffff         | mov                 dword ptr [ebp - 0x94], eax
            //   8d0c02               | lea                 ecx, [edx + eax]
            //   8bc7                 | mov                 eax, edi
            //   33c1                 | xor                 eax, ecx

        $sequence_3 = { 0431 83f020 8845f5 8b45c0 0432 83f074 }
            // n = 6, score = 200
            //   0431                 | add                 al, 0x31
            //   83f020               | xor                 eax, 0x20
            //   8845f5               | mov                 byte ptr [ebp - 0xb], al
            //   8b45c0               | mov                 eax, dword ptr [ebp - 0x40]
            //   0432                 | add                 al, 0x32
            //   83f074               | xor                 eax, 0x74

        $sequence_4 = { 3c40 7518 8b06 8b400c 85c0 74a7 }
            // n = 6, score = 200
            //   3c40                 | cmp                 al, 0x40
            //   7518                 | jne                 0x1a
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   8b400c               | mov                 eax, dword ptr [eax + 0xc]
            //   85c0                 | test                eax, eax
            //   74a7                 | je                  0xffffffa9

        $sequence_5 = { 83c002 50 ff75e8 8d470c c7470400000000 }
            // n = 5, score = 200
            //   83c002               | add                 eax, 2
            //   50                   | push                eax
            //   ff75e8               | push                dword ptr [ebp - 0x18]
            //   8d470c               | lea                 eax, [edi + 0xc]
            //   c7470400000000       | mov                 dword ptr [edi + 4], 0

        $sequence_6 = { 2bd6 8a06 46 3ac1 7548 8a0c32 84c9 }
            // n = 7, score = 200
            //   2bd6                 | sub                 edx, esi
            //   8a06                 | mov                 al, byte ptr [esi]
            //   46                   | inc                 esi
            //   3ac1                 | cmp                 al, cl
            //   7548                 | jne                 0x4a
            //   8a0c32               | mov                 cl, byte ptr [edx + esi]
            //   84c9                 | test                cl, cl

        $sequence_7 = { 83c40c 5e 5d c3 8b550c 85d2 7406 }
            // n = 7, score = 200
            //   83c40c               | add                 esp, 0xc
            //   5e                   | pop                 esi
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   85d2                 | test                edx, edx
            //   7406                 | je                  8

        $sequence_8 = { 894598 8b8544ffffff 8945fc 8b853cffffff 8955d0 8945ec }
            // n = 6, score = 200
            //   894598               | mov                 dword ptr [ebp - 0x68], eax
            //   8b8544ffffff         | mov                 eax, dword ptr [ebp - 0xbc]
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   8b853cffffff         | mov                 eax, dword ptr [ebp - 0xc4]
            //   8955d0               | mov                 dword ptr [ebp - 0x30], edx
            //   8945ec               | mov                 dword ptr [ebp - 0x14], eax

        $sequence_9 = { 85d2 743d 80c980 884c35f4 8ac8 46 c1e807 }
            // n = 7, score = 200
            //   85d2                 | test                edx, edx
            //   743d                 | je                  0x3f
            //   80c980               | or                  cl, 0x80
            //   884c35f4             | mov                 byte ptr [ebp + esi - 0xc], cl
            //   8ac8                 | mov                 cl, al
            //   46                   | inc                 esi
            //   c1e807               | shr                 eax, 7

    condition:
        7 of them and filesize < 172032
}
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