SYMBOLCOMMON_NAMEaka. SYNONYMS
win.nemty (Back to overview)

Nemty

VTCollection    

Nemty is a ransomware that was discovered in September 2019. Fortinet states that they found it being distributed through similar ways as Sodinokibi and also noted artfifacts they had seen before in Gandcrab.

References
2022-08-08Medium CSIS TechblogBenoît Ancel
An inside view of domain anonymization as-a-service — the BraZZZerSFF infrastructure
Riltok magecart Anubis Azorult BetaBot Buer CoalaBot CryptBot DiamondFox DreamBot GCleaner ISFB Loki Password Stealer (PWS) MedusaLocker MeguminTrojan Nemty PsiX RedLine Stealer SmokeLoader STOP TinyNuke Vidar Zloader
2022-04-21Sentinel LABSAntonis Terefos
Nokoyawa Ransomware | New Karma/Nemty Variant Wears Thin Disguise
Hive Karma Nemty Nokoyawa Ransomware
2022-03-16SymantecSymantec Threat Hunter Team
The Ransomware Threat Landscape: What to Expect in 2022
AvosLocker BlackCat BlackMatter Conti DarkSide DoppelPaymer Emotet Hive Karma Mespinoza Nemty Squirrelwaffle VegaLocker WastedLocker Yanluowang Zeppelin
2021-10-18SentinelOneAntonis Terefos
Karma Ransomware | An Emerging Threat With A Hint of Nemty Pedigree
Karma Nemty
2021-05-25KasperskyFedor Sinitsyn, Yanis Zinchenko
Evolution of JSWorm ransomware
Nefilim Nemty
2021-05-10DarkTracerDarkTracer
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
2021-05-06Cyborg SecurityBrandon Denker
Ransomware: Hunting for Inhibiting System Backup or Recovery
Avaddon Conti DarkSide LockBit Mailto Maze Mespinoza Nemty PwndLocker RagnarLocker RansomEXX REvil Ryuk Snatch ThunderX
2021-04-12PTSecurityPTSecurity
PaaS, or how hackers evade antivirus software
Amadey Bunitu Cerber Dridex ISFB KPOT Stealer Mailto Nemty Phobos Pony Predator The Thief QakBot Raccoon RTM SmokeLoader Zloader
2021-02-23CrowdStrikeCrowdStrike
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 Evilnum OUTLAW SPIDER RIDDLE SPIDER SOLAR SPIDER VIKING SPIDER
2021-02-02CRONUPGermán Fernández
De ataque con Malware a incidente de Ransomware
Avaddon BazarBackdoor Buer Clop Cobalt Strike Conti DanaBot Dharma Dridex Egregor Emotet Empire Downloader FriedEx GootKit IcedID MegaCortex Nemty Phorpiex PwndLocker PyXie QakBot RansomEXX REvil Ryuk SDBbot SmokeLoader TrickBot Zloader
2021-01-25Medium CSIS TechblogBenoît Ancel
The Nemty affiliate model
Nemty
2021-01-01SecureworksSecureWorks
Threat Profile: GOLD MANSARD
Nefilim Nemty GOLD MANSARD
2020-07-29ESET Researchwelivesecurity
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 PlugX Pony REvil Socelars STOP Tinba TrickBot WannaCryptor
2020-05-04SentinelOneJim Walter
Meet NEMTY Successor, Nefilim/Nephilim Ransomware
Nefilim Nemty
2020-04-02McAfeeAlexandre Mundo, Marc Rivero López
Nemty Ransomware – Learning by Doing
Nemty
2020-03-24Bleeping ComputerLawrence Abrams
Three More Ransomware Families Create Sites to Leak Stolen Data
Clop DoppelPaymer Maze Nefilim Nemty REvil
2020-02-18LastlineJason Zhang, Stefano Ortolani
Nemty Ransomware Scaling UP: APAC Mailboxes Swarmed by Dual Downloaders
Nemty Phorpiex
2020-01-10Github (albertzsigovits)Albert Zsigovits
Nemty ransomware
Nemty
2019-11-04SymantecEduardo Altares, Muhammad Hasib Latif, Nguyen Hoang Giang
Nemty Ransomware Expands Its Reach, Also Delivered by Trik Botnet
Nemty Phorpiex
2019-10-10TesorionFrank van den Hurk
Nemty update: decryptors for Nemty 1.5 and 1.6
Nemty
2019-10-10Bleeping ComputerLawrence Abrams
Nemty Ransomware Decryptor Released, Recover Files for Free
Nemty
2019-09-17FortinetJoie Salvio
Nemty Ransomware 1.0: A Threat in its Early Stage
Nemty
2019-09-08Bleeping ComputerIonut Ilascu
Fake PayPal Site Spreads Nemty Ransomware
Nemty
2019-09-03Bleeping ComputerIonut Ilascu
Nemty Ransomware Gets Distribution from RIG Exploit Kit
Nemty
2019-08-26Bleeping ComputerIonut Ilascu
New Nemty Ransomware May Spread via Compromised RDP Connections
Nemty
2019-08-24Github (k-vitali)Vitali Kremez
Notes on Nemty Ransomware
Nemty
Yara Rules
[TLP:WHITE] win_nemty_auto (20230808 | Detects win.nemty.)
rule win_nemty_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-12-06"
        version = "1"
        description = "Detects win.nemty."
        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.nemty"
        malpedia_rule_date = "20231130"
        malpedia_hash = "fc8a0e9f343f6d6ded9e7df1a64dac0cc68d7351"
        malpedia_version = "20230808"
        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 = { 51 e8???????? 59 e8???????? 83c438 85c0 }
            // n = 6, score = 300
            //   51                   | push                ecx
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   e8????????           |                     
            //   83c438               | add                 esp, 0x38
            //   85c0                 | test                eax, eax

        $sequence_1 = { 8945a4 a1???????? 59 bf???????? 8bca 83f810 7302 }
            // n = 7, score = 300
            //   8945a4               | mov                 dword ptr [ebp - 0x5c], eax
            //   a1????????           |                     
            //   59                   | pop                 ecx
            //   bf????????           |                     
            //   8bca                 | mov                 ecx, edx
            //   83f810               | cmp                 eax, 0x10
            //   7302                 | jae                 4

        $sequence_2 = { 81ec18040000 a1???????? 33c5 8945fc 837d2010 8b4508 }
            // n = 6, score = 300
            //   81ec18040000         | sub                 esp, 0x418
            //   a1????????           |                     
            //   33c5                 | xor                 eax, ebp
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   837d2010             | cmp                 dword ptr [ebp + 0x20], 0x10
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]

        $sequence_3 = { 83781408 8b4810 57 7202 8b00 8b3d???????? 33db }
            // n = 7, score = 300
            //   83781408             | cmp                 dword ptr [eax + 0x14], 8
            //   8b4810               | mov                 ecx, dword ptr [eax + 0x10]
            //   57                   | push                edi
            //   7202                 | jb                  4
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   8b3d????????         |                     
            //   33db                 | xor                 ebx, ebx

        $sequence_4 = { 6a1c 99 5e f7fe 33db 895dd8 }
            // n = 6, score = 300
            //   6a1c                 | push                0x1c
            //   99                   | cdq                 
            //   5e                   | pop                 esi
            //   f7fe                 | idiv                esi
            //   33db                 | xor                 ebx, ebx
            //   895dd8               | mov                 dword ptr [ebp - 0x28], ebx

        $sequence_5 = { 33ff e8???????? 83c61c 3b7510 75ef 6a00 }
            // n = 6, score = 300
            //   33ff                 | xor                 edi, edi
            //   e8????????           |                     
            //   83c61c               | add                 esi, 0x1c
            //   3b7510               | cmp                 esi, dword ptr [ebp + 0x10]
            //   75ef                 | jne                 0xfffffff1
            //   6a00                 | push                0

        $sequence_6 = { 83ec1c 8bd8 8bc4 68???????? e8???????? }
            // n = 5, score = 300
            //   83ec1c               | sub                 esp, 0x1c
            //   8bd8                 | mov                 ebx, eax
            //   8bc4                 | mov                 eax, esp
            //   68????????           |                     
            //   e8????????           |                     

        $sequence_7 = { 8db4248c000000 e8???????? 53 8d742454 }
            // n = 4, score = 300
            //   8db4248c000000       | lea                 esi, [esp + 0x8c]
            //   e8????????           |                     
            //   53                   | push                ebx
            //   8d742454             | lea                 esi, [esp + 0x54]

        $sequence_8 = { 7509 be???????? 85c0 7405 }
            // n = 4, score = 300
            //   7509                 | jne                 0xb
            //   be????????           |                     
            //   85c0                 | test                eax, eax
            //   7405                 | je                  7

        $sequence_9 = { 837d3810 8bf8 8b4524 59 7303 8d4524 837d3810 }
            // n = 7, score = 300
            //   837d3810             | cmp                 dword ptr [ebp + 0x38], 0x10
            //   8bf8                 | mov                 edi, eax
            //   8b4524               | mov                 eax, dword ptr [ebp + 0x24]
            //   59                   | pop                 ecx
            //   7303                 | jae                 5
            //   8d4524               | lea                 eax, [ebp + 0x24]
            //   837d3810             | cmp                 dword ptr [ebp + 0x38], 0x10

    condition:
        7 of them and filesize < 204800
}
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