SYMBOLCOMMON_NAMEaka. SYNONYMS
win.tinyloader (Back to overview)

TinyLoader

Actor(s): Tiny Spider


There is no description at this point.

References
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 DoppelPaymer Dridex Emotet FlawedAmmyy FriedEx Gandcrab Get2 IcedID ISFB KerrDown LightNeuron LockerGoga Maze MECHANICAL 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 APT31 APT39 BlackTech BuhTrap Charming Kitten CLOCKWORD SPIDER DOPPEL SPIDER Gamaredon Group Leviathan MONTY SPIDER Mustang Panda NARWHAL SPIDER NOCTURNAL SPIDER Pinchy Spider Pirate Panda Salty Spider SCULLY SPIDER SMOKY SPIDER Thrip VENOM SPIDER
2016-05-10ProofpointMatthew Mesa, Darien Huss
@online{mesa:20160510:setting:2b54ce3, author = {Matthew Mesa and Darien Huss}, title = {{Setting Sights On Retail: AbaddonPOS Now Targeting Specific POS Software}}, date = {2016-05-10}, organization = {Proofpoint}, url = {https://www.proofpoint.com/us/threat-insight/post/abaddonpos-now-targeting-specific-pos-software}, language = {English}, urldate = {2019-12-20} } Setting Sights On Retail: AbaddonPOS Now Targeting Specific POS Software
AbaddonPOS TinyLoader
2015-11-11ProofpointDarien Huss
@online{huss:20151111:abaddonpos:ca72c4c, author = {Darien Huss}, title = {{AbaddonPOS: A new point of sale threat linked to Vawtrak}}, date = {2015-11-11}, organization = {Proofpoint}, url = {https://www.proofpoint.com/us/threat-insight/post/AbaddonPOS-A-New-Point-Of-Sale-Threat-Linked-To-Vawtrak}, language = {English}, urldate = {2019-12-20} } AbaddonPOS: A new point of sale threat linked to Vawtrak
AbaddonPOS TinyLoader
Yara Rules
[TLP:WHITE] win_tinyloader_auto (20201014 | autogenerated rule brought to you by yara-signator)
rule win_tinyloader_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.tinyloader"
        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 = { 8b5d00 039d58080000 6a00 6800040000 }
            // n = 4, score = 100
            //   8b5d00               | mov                 ebx, dword ptr [ebp]
            //   039d58080000         | add                 ebx, dword ptr [ebp + 0x858]
            //   6a00                 | push                0
            //   6800040000           | push                0x400

        $sequence_1 = { 637574 6541 0050ff 15???????? c705????????00010000 }
            // n = 5, score = 100
            //   637574               | arpl                word ptr [ebp + 0x74], si
            //   6541                 | inc                 ecx
            //   0050ff               | add                 byte ptr [eax - 1], dl
            //   15????????           |                     
            //   c705????????00010000     |     

        $sequence_2 = { 7405 83f800 7505 e9???????? 018558080000 }
            // n = 5, score = 100
            //   7405                 | je                  7
            //   83f800               | cmp                 eax, 0
            //   7505                 | jne                 7
            //   e9????????           |                     
            //   018558080000         | add                 dword ptr [ebp + 0x858], eax

        $sequence_3 = { c783000400000c000000 8b8540050000 8b5d00 894308 8b85f8070000 8b5d00 894304 }
            // n = 7, score = 100
            //   c783000400000c000000     | mov    dword ptr [ebx + 0x400], 0xc
            //   8b8540050000         | mov                 eax, dword ptr [ebp + 0x540]
            //   8b5d00               | mov                 ebx, dword ptr [ebp]
            //   894308               | mov                 dword ptr [ebx + 8], eax
            //   8b85f8070000         | mov                 eax, dword ptr [ebp + 0x7f8]
            //   8b5d00               | mov                 ebx, dword ptr [ebp]
            //   894304               | mov                 dword ptr [ebx + 4], eax

        $sequence_4 = { 81fb04030000 730c 90 83c004 90 }
            // n = 5, score = 100
            //   81fb04030000         | cmp                 ebx, 0x304
            //   730c                 | jae                 0xe
            //   90                   | nop                 
            //   83c004               | add                 eax, 4
            //   90                   | nop                 

        $sequence_5 = { 894518 0500200000 894510 0500080000 894520 ffb5a0050000 }
            // n = 6, score = 100
            //   894518               | mov                 dword ptr [ebp + 0x18], eax
            //   0500200000           | add                 eax, 0x2000
            //   894510               | mov                 dword ptr [ebp + 0x10], eax
            //   0500080000           | add                 eax, 0x800
            //   894520               | mov                 dword ptr [ebp + 0x20], eax
            //   ffb5a0050000         | push                dword ptr [ebp + 0x5a0]

        $sequence_6 = { 8b5d00 8b4308 83f800 7407 807c03ffc3 7402 }
            // n = 6, score = 100
            //   8b5d00               | mov                 ebx, dword ptr [ebp]
            //   8b4308               | mov                 eax, dword ptr [ebx + 8]
            //   83f800               | cmp                 eax, 0
            //   7407                 | je                  9
            //   807c03ffc3           | cmp                 byte ptr [ebx + eax - 1], 0xc3
            //   7402                 | je                  4

        $sequence_7 = { 83c00c ffd0 31db 8b4500 8b8000040000 }
            // n = 5, score = 100
            //   83c00c               | add                 eax, 0xc
            //   ffd0                 | call                eax
            //   31db                 | xor                 ebx, ebx
            //   8b4500               | mov                 eax, dword ptr [ebp]
            //   8b8000040000         | mov                 eax, dword ptr [eax + 0x400]

        $sequence_8 = { 8938 90 81fb04030000 730d }
            // n = 4, score = 100
            //   8938                 | mov                 dword ptr [eax], edi
            //   90                   | nop                 
            //   81fb04030000         | cmp                 ebx, 0x304
            //   730d                 | jae                 0xf

        $sequence_9 = { ff15???????? e8???????? 7368 656c 6c }
            // n = 5, score = 100
            //   ff15????????         |                     
            //   e8????????           |                     
            //   7368                 | jae                 0x6a
            //   656c                 | insb                byte ptr es:[edi], dx
            //   6c                   | insb                byte ptr es:[edi], dx

        $sequence_10 = { 15???????? c705????????00010000 68???????? 68???????? ff15???????? }
            // n = 5, score = 100
            //   15????????           |                     
            //   c705????????00010000     |     
            //   68????????           |                     
            //   68????????           |                     
            //   ff15????????         |                     

        $sequence_11 = { 6832a00000 ff15???????? 8b9da8050000 66894302 }
            // n = 4, score = 100
            //   6832a00000           | push                0xa032
            //   ff15????????         |                     
            //   8b9da8050000         | mov                 ebx, dword ptr [ebp + 0x5a8]
            //   66894302             | mov                 word ptr [ebx + 2], ax

        $sequence_12 = { 8b5d00 894304 8b5d00 81c300040000 }
            // n = 4, score = 100
            //   8b5d00               | mov                 ebx, dword ptr [ebp]
            //   894304               | mov                 dword ptr [ebx + 4], eax
            //   8b5d00               | mov                 ebx, dword ptr [ebp]
            //   81c300040000         | add                 ebx, 0x400

        $sequence_13 = { 90 895830 90 8b1d???????? 90 }
            // n = 5, score = 100
            //   90                   | nop                 
            //   895830               | mov                 dword ptr [eax + 0x30], ebx
            //   90                   | nop                 
            //   8b1d????????         |                     
            //   90                   | nop                 

        $sequence_14 = { 90 895838 90 89c6 90 }
            // n = 5, score = 100
            //   90                   | nop                 
            //   895838               | mov                 dword ptr [eax + 0x38], ebx
            //   90                   | nop                 
            //   89c6                 | mov                 esi, eax
            //   90                   | nop                 

        $sequence_15 = { 31db 90 90 8bbb97114000 90 8938 }
            // n = 6, score = 100
            //   31db                 | xor                 ebx, ebx
            //   90                   | nop                 
            //   90                   | nop                 
            //   8bbb97114000         | mov                 edi, dword ptr [ebx + 0x401197]
            //   90                   | nop                 
            //   8938                 | mov                 dword ptr [eax], edi

    condition:
        7 of them and filesize < 40960
}
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