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
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 = {2020-03-04} } 2020 CrowdStrike Global Threat Report
MESSAGETAP More_eggs 8.t Dropper Anchor BabyShark BadNews Clop Cobalt Strike CobInt Cobra Carbon System Cutwail DanaBot Dharma DoppelPaymer Dridex Emotet FlawedAmmyy FriedEx Gandcrab Get2 IcedID ISFB KerrDown LightNeuron LockerGoga Maze Necurs Nokki Outlook Backdoor Phobos Ransomware Predator The Thief QakBot REvil RobinHood Ryuk SDBbot Skipper SmokeLoader TerraRecon TerraStealer TerraTV TinyLoader TrickBot vidar Winnti ANTHROPOID SPIDER Anunak APT39 BlackTech BuhTrap Charming Kitten CLOCKWORD SPIDER DOPPEL SPIDER Gamaredon Group Judgment Panda 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 = {2019-12-20} } Chinese APT “Operation LagTime IT” Targets Government Information Technology Agencies in Eastern Asia
8.t Dropper Cotx RAT 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 (20200529 | autogenerated rule brought to you by yara-signator)
rule win_8t_dropper_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-05-30"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.4.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.8t_dropper"
        malpedia_rule_date = "20200529"
        malpedia_hash = "92c362319514e5a6da26204961446caa3a8b32a8"
        malpedia_version = "20200529"
        malpedia_license = "CC BY-NC-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 / approach 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 = { 83c408 85f6 741b 56 6800700000 6a01 68???????? }
            // n = 7, score = 200
            //   83c408               | add                 esp, 8
            //   85f6                 | test                esi, esi
            //   741b                 | je                  0x1d
            //   56                   | push                esi
            //   6800700000           | push                0x7000
            //   6a01                 | push                1
            //   68????????           |                     

        $sequence_1 = { e8???????? 8bf0 83c408 85f6 741b 56 }
            // n = 6, score = 200
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   83c408               | add                 esp, 8
            //   85f6                 | test                esi, esi
            //   741b                 | je                  0x1d
            //   56                   | push                esi

        $sequence_2 = { 6a40 ff74240c ff74240c e8???????? 83c40c c3 8b442408 }
            // n = 7, score = 200
            //   6a40                 | push                0x40
            //   ff74240c             | push                dword ptr [esp + 0xc]
            //   ff74240c             | push                dword ptr [esp + 0xc]
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   c3                   | ret                 
            //   8b442408             | mov                 eax, dword ptr [esp + 8]

        $sequence_3 = { ff15???????? 8d842410010000 68???????? 50 e8???????? 8bf0 }
            // n = 6, score = 200
            //   ff15????????         |                     
            //   8d842410010000       | lea                 eax, [esp + 0x110]
            //   68????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax

        $sequence_4 = { 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_5 = { 83c9ff f2ae f7d1 49 c6440c0c52 }
            // n = 5, score = 200
            //   83c9ff               | or                  ecx, 0xffffffff
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]
            //   f7d1                 | not                 ecx
            //   49                   | dec                 ecx
            //   c6440c0c52           | mov                 byte ptr [esp + ecx + 0xc], 0x52

        $sequence_6 = { 81ec0c020000 56 57 b940000000 33c0 8d7c240d }
            // n = 6, score = 200
            //   81ec0c020000         | sub                 esp, 0x20c
            //   56                   | push                esi
            //   57                   | push                edi
            //   b940000000           | mov                 ecx, 0x40
            //   33c0                 | xor                 eax, eax
            //   8d7c240d             | lea                 edi, [esp + 0xd]

        $sequence_7 = { 83c408 85f6 741b 56 6800700000 6a01 }
            // n = 6, score = 200
            //   83c408               | add                 esp, 8
            //   85f6                 | test                esi, esi
            //   741b                 | je                  0x1d
            //   56                   | push                esi
            //   6800700000           | push                0x7000
            //   6a01                 | push                1

        $sequence_8 = { f2ae f7d1 49 c6440c0c52 }
            // n = 4, score = 200
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]
            //   f7d1                 | not                 ecx
            //   49                   | dec                 ecx
            //   c6440c0c52           | mov                 byte ptr [esp + ecx + 0xc], 0x52

        $sequence_9 = { 6a01 68???????? e8???????? 56 e8???????? 83c414 5f }
            // n = 7, score = 200
            //   6a01                 | push                1
            //   68????????           |                     
            //   e8????????           |                     
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c414               | add                 esp, 0x14
            //   5f                   | pop                 edi

    condition:
        7 of them and filesize < 147456
}
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