SYMBOLCOMMON_NAMEaka. SYNONYMS
win.8t_dropper (Back to overview)

8.t Dropper

aka: 8t_dropper, RoyalRoad

Actor(s): Hellsing, Ice Fog, Pirate Panda, RANCOR, TA428, Tick, Tonto Team, Karma Panda


8T_Dropper has been used by Chinese threat actor TA428 in order to install Cotx RAT onto victim's machines during Operation LagTime IT. According to Proofpoint the attack was developed against a number of government agencies in East Asia overseeing government information technology, domestic affairs, foreign affairs, economic development, and political processes. The dropper was delivered through an RTF document exploiting CVE-2018-0798.

References
2021-02-28PWC UKPWC UK
@techreport{uk:20210228:cyber:bd780cd, author = {PWC UK}, title = {{Cyber Threats 2020: A Year in Retrospect}}, date = {2021-02-28}, institution = {PWC UK}, url = {https://www.pwc.co.uk/cyber-security/pdf/pwc-cyber-threats-2020-a-year-in-retrospect.pdf}, language = {English}, urldate = {2021-03-04} } Cyber Threats 2020: A Year in Retrospect
elf.wellmess FlowerPower PowGoop 8.t Dropper Agent.BTZ Agent Tesla Appleseed Ave Maria Bankshot BazarBackdoor BLINDINGCAN Chinoxy Conti Cotx RAT Crimson RAT DUSTMAN Emotet FriedEx FunnyDream Hakbit Mailto Maze METALJACK Nefilim Oblique RAT Pay2Key PlugX QakBot REvil Ryuk StoneDrill StrongPity SUNBURST SUPERNOVA TrickBot TurlaRPC Turla SilentMoon WastedLocker WellMess Winnti ZeroCleare
2021-01-13AlienVaultTom Hegel
@techreport{hegel:20210113:global:72b7b9d, author = {Tom Hegel}, title = {{A Global Perspective of the SideWinder APT}}, date = {2021-01-13}, institution = {AlienVault}, url = {https://cdn-cybersecurity.att.com/docs/global-perspective-of-the-sidewinder-apt.pdf}, language = {English}, urldate = {2021-01-18} } A Global Perspective of the SideWinder APT
8.t Dropper Koadic SideWinder
2021-01-04nao_sec blognao_sec
@online{naosec:20210104:royal:041b9d3, author = {nao_sec}, title = {{Royal Road! Re:Dive}}, date = {2021-01-04}, organization = {nao_sec blog}, url = {https://nao-sec.org/2021/01/royal-road-redive.html}, language = {English}, urldate = {2021-01-05} } Royal Road! Re:Dive
8.t Dropper Chinoxy FlowCloud FunnyDream Lookback
2020-09-16RiskIQJon Gross
@online{gross:20200916:riskiq:da4b864, author = {Jon Gross}, title = {{RiskIQ: Adventures in Cookie Land - Part 2}}, date = {2020-09-16}, organization = {RiskIQ}, url = {https://community.riskiq.com/article/56fa1b2f}, language = {English}, urldate = {2020-09-23} } RiskIQ: Adventures in Cookie Land - Part 2
8.t Dropper Chinoxy Poison Ivy
2020-08-19RiskIQJon Gross, Cory Kennedy
@online{gross:20200819:riskiq:94e5ccf, author = {Jon Gross and Cory Kennedy}, title = {{RiskIQ Adventures in Cookie Land - Part 1}}, date = {2020-08-19}, organization = {RiskIQ}, url = {https://community.riskiq.com/article/5fe2da7f}, language = {English}, urldate = {2020-09-23} } RiskIQ Adventures in Cookie Land - Part 1
8.t Dropper Chinoxy
2020-06-03Kaspersky LabsGReAT, Mark Lechtik, Giampaolo Dedola
@online{great:20200603:cycldek:ed9a830, author = {GReAT and Mark Lechtik and Giampaolo Dedola}, title = {{Cycldek: Bridging the (air) gap}}, date = {2020-06-03}, organization = {Kaspersky Labs}, url = {https://securelist.com/cycldek-bridging-the-air-gap/97157/}, language = {English}, urldate = {2020-06-03} } Cycldek: Bridging the (air) gap
8.t Dropper NewCore RAT PlugX USBCulprit Hellsing
2020-03-21MalwareLab.plMaciej Kotowicz
@online{kotowicz:20200321:royal:da8fd16, author = {Maciej Kotowicz}, title = {{On the Royal Road}}, date = {2020-03-21}, organization = {MalwareLab.pl}, url = {https://blog.malwarelab.pl/posts/on_the_royal_road/}, language = {English}, urldate = {2020-03-24} } On the Royal Road
8.t Dropper
2020-03-20Medium SebdravenSébastien Larinier
@online{larinier:20200320:new:3da1211, author = {Sébastien Larinier}, title = {{New version of chinoxy backdoor using COVID19 alerts document lure}}, date = {2020-03-20}, organization = {Medium Sebdraven}, url = {https://medium.com/@Sebdraven/new-version-of-chinoxy-backdoor-using-covid19-document-lure-83fa294c0746}, language = {English}, urldate = {2020-03-26} } New version of chinoxy backdoor using COVID19 alerts document lure
8.t Dropper Chinoxy
2020-03-12Check PointCheck Point Research
@online{research:20200312:vicious:3218bb8, author = {Check Point Research}, title = {{Vicious Panda: The COVID Campaign}}, date = {2020-03-12}, organization = {Check Point}, url = {https://research.checkpoint.com/2020/vicious-panda-the-covid-campaign/}, language = {English}, urldate = {2020-03-13} } Vicious Panda: The COVID Campaign
8.t Dropper BYEBY Enfal Korlia Poison Ivy
2020-03-11Virus BulletinGhareeb Saad, Michael Raggi
@online{saad:20200311:attribution:3efcc0a, author = {Ghareeb Saad and Michael Raggi}, title = {{Attribution is in the object: using RTF object dimensions to track APT phishing weaponizers}}, date = {2020-03-11}, organization = {Virus Bulletin}, url = {https://www.virusbulletin.com/virusbulletin/2020/03/vb2019-paper-attribution-object-using-rtf-object-dimensions-track-apt-phishing-weaponizers/}, language = {English}, urldate = {2020-03-13} } Attribution is in the object: using RTF object dimensions to track APT phishing weaponizers
8.t Dropper
2020-03-04CrowdStrikeCrowdStrike
@techreport{crowdstrike:20200304:2020:818c85f, author = {CrowdStrike}, title = {{2020 CrowdStrike Global Threat Report}}, date = {2020-03-04}, institution = {CrowdStrike}, url = {https://go.crowdstrike.com/rs/281-OBQ-266/images/Report2020CrowdStrikeGlobalThreatReport.pdf}, language = {English}, urldate = {2020-07-24} } 2020 CrowdStrike Global Threat Report
MESSAGETAP More_eggs 8.t Dropper Anchor BabyShark BadNews Clop Cobalt Strike CobInt Cobra Carbon System Cutwail DanaBot Dharma DoppelDridex DoppelPaymer Dridex Emotet FlawedAmmyy FriedEx Gandcrab Get2 IcedID ISFB KerrDown LightNeuron LockerGoga Maze MECHANICAL Necurs Nokki Outlook Backdoor Phobos Predator The Thief QakBot REvil RobinHood Ryuk SDBbot Skipper SmokeLoader TerraRecon TerraStealer TerraTV TinyLoader TrickBot vidar Winnti ANTHROPOID SPIDER APT31 APT39 BlackTech BuhTrap Charming Kitten CLOCKWORK SPIDER DOPPEL SPIDER FIN7 Gamaredon Group Leviathan MONTY SPIDER Mustang Panda NARWHAL SPIDER NOCTURNAL SPIDER PINCHY SPIDER Pirate Panda SALTY SPIDER SCULLY SPIDER SMOKY SPIDER Thrip VENOM SPIDER
2019-09-22Check Point ResearchCheck Point Research
@online{research:20190922:rancor:e834f67, author = {Check Point Research}, title = {{Rancor: The Year of The Phish}}, date = {2019-09-22}, organization = {Check Point Research}, url = {https://research.checkpoint.com/2019/rancor-the-year-of-the-phish/}, language = {English}, urldate = {2020-03-04} } Rancor: The Year of The Phish
8.t Dropper Cobalt Strike
2019-07-23ProofpointMichael Raggi, Dennis Schwarz, Proofpoint Threat Insight Team
@online{raggi:20190723:chinese:804ec1c, author = {Michael Raggi and Dennis Schwarz and Proofpoint Threat Insight Team}, title = {{Chinese APT “Operation LagTime IT” Targets Government Information Technology Agencies in Eastern Asia}}, date = {2019-07-23}, organization = {Proofpoint}, url = {https://www.proofpoint.com/us/threat-insight/post/chinese-apt-operation-lagtime-it-targets-government-information-technology}, language = {English}, urldate = {2021-02-06} } Chinese APT “Operation LagTime IT” Targets Government Information Technology Agencies in Eastern Asia
8.t Dropper Cotx RAT Poison Ivy TA428
2019-01-03m4n0w4r
@online{m4n0w4r:20190103:another:2f48120, author = {m4n0w4r}, title = {{Another malicious document with CVE-2017–11882}}, date = {2019-01-03}, url = {https://tradahacking.vn/another-malicious-document-with-cve-2017-11882-839e9c0bbf2f}, language = {Vietnamese}, urldate = {2020-03-11} } Another malicious document with CVE-2017–11882
8.t Dropper
2018-11-03m4n0w4r
@online{m4n0w4r:20181103:l:d496fbd, author = {m4n0w4r}, title = {{Là 1937CN hay OceanLotus hay Lazarus …}}, date = {2018-11-03}, url = {https://tradahacking.vn/l%C3%A0-1937cn-hay-oceanlotus-hay-lazarus-6ca15fe1b241}, language = {Vietnamese}, urldate = {2020-03-11} } Là 1937CN hay OceanLotus hay Lazarus …
8.t Dropper
2018-07-31Medium SebdravenSébastien Larinier
@online{larinier:20180731:malicious:571d2df, author = {Sébastien Larinier}, title = {{Malicious document targets Vietnamese officials}}, date = {2018-07-31}, organization = {Medium Sebdraven}, url = {https://medium.com/@Sebdraven/malicious-document-targets-vietnamese-officials-acb3b9d8b80a?}, language = {English}, urldate = {2020-03-04} } Malicious document targets Vietnamese officials
8.t Dropper
Yara Rules
[TLP:WHITE] win_8t_dropper_auto (20210616 | Detects win.8t_dropper.)
rule win_8t_dropper_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.8t_dropper."
        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.8t_dropper"
        malpedia_rule_date = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 8d942410010000 6804010000 52 68???????? ff15???????? 8d842410010000 }
            // n = 6, score = 200
            //   8d942410010000       | lea                 edx, dword ptr [esp + 0x110]
            //   6804010000           | push                0x104
            //   52                   | push                edx
            //   68????????           |                     
            //   ff15????????         |                     
            //   8d842410010000       | lea                 eax, dword ptr [esp + 0x110]

        $sequence_1 = { e8???????? 83c40c c3 8b442408 83f801 }
            // n = 5, score = 200
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   c3                   | ret                 
            //   8b442408             | mov                 eax, dword ptr [esp + 8]
            //   83f801               | cmp                 eax, 1

        $sequence_2 = { 85c0 7559 8b4c2408 51 ff15???????? 8d942410010000 6804010000 }
            // n = 7, score = 200
            //   85c0                 | test                eax, eax
            //   7559                 | jne                 0x5b
            //   8b4c2408             | mov                 ecx, dword ptr [esp + 8]
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8d942410010000       | lea                 edx, dword ptr [esp + 0x110]
            //   6804010000           | push                0x104

        $sequence_3 = { 50 ff15???????? 85c0 7559 8b4c2408 }
            // n = 5, score = 200
            //   50                   | push                eax
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7559                 | jne                 0x5b
            //   8b4c2408             | mov                 ecx, dword ptr [esp + 8]

        $sequence_4 = { c6440c0c52 c6440c0d75 c6440c0e6e 8d4c2408 51 683f000f00 50 }
            // n = 7, score = 200
            //   c6440c0c52           | mov                 byte ptr [esp + ecx + 0xc], 0x52
            //   c6440c0d75           | mov                 byte ptr [esp + ecx + 0xd], 0x75
            //   c6440c0e6e           | mov                 byte ptr [esp + ecx + 0xe], 0x6e
            //   8d4c2408             | lea                 ecx, dword ptr [esp + 8]
            //   51                   | push                ecx
            //   683f000f00           | push                0xf003f
            //   50                   | push                eax

        $sequence_5 = { 83c40c c3 8b442408 83f801 }
            // n = 4, score = 200
            //   83c40c               | add                 esp, 0xc
            //   c3                   | ret                 
            //   8b442408             | mov                 eax, dword ptr [esp + 8]
            //   83f801               | cmp                 eax, 1

        $sequence_6 = { 33c0 8d7c240d c644240c00 f3ab 66ab aa bf???????? }
            // n = 7, score = 200
            //   33c0                 | xor                 eax, eax
            //   8d7c240d             | lea                 edi, dword ptr [esp + 0xd]
            //   c644240c00           | mov                 byte ptr [esp + 0xc], 0
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   66ab                 | stosw               word ptr es:[edi], ax
            //   aa                   | stosb               byte ptr es:[edi], al
            //   bf????????           |                     

        $sequence_7 = { f7d1 49 c6440c0c52 c6440c0d75 c6440c0e6e 8d4c2408 }
            // n = 6, score = 200
            //   f7d1                 | not                 ecx
            //   49                   | dec                 ecx
            //   c6440c0c52           | mov                 byte ptr [esp + ecx + 0xc], 0x52
            //   c6440c0d75           | mov                 byte ptr [esp + ecx + 0xd], 0x75
            //   c6440c0e6e           | mov                 byte ptr [esp + ecx + 0xe], 0x6e
            //   8d4c2408             | lea                 ecx, dword ptr [esp + 8]

        $sequence_8 = { f7d1 49 c6440c0c52 c6440c0d75 c6440c0e6e 8d4c2408 51 }
            // n = 7, score = 200
            //   f7d1                 | not                 ecx
            //   49                   | dec                 ecx
            //   c6440c0c52           | mov                 byte ptr [esp + ecx + 0xc], 0x52
            //   c6440c0d75           | mov                 byte ptr [esp + ecx + 0xd], 0x75
            //   c6440c0e6e           | mov                 byte ptr [esp + ecx + 0xe], 0x6e
            //   8d4c2408             | lea                 ecx, dword ptr [esp + 8]
            //   51                   | push                ecx

        $sequence_9 = { 8d842410010000 68???????? 50 e8???????? 8bf0 83c408 }
            // n = 6, score = 200
            //   8d842410010000       | lea                 eax, dword ptr [esp + 0x110]
            //   68????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   83c408               | add                 esp, 8

    condition:
        7 of them and filesize < 147456
}
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