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 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
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 (20210616 | Detects win.tinyloader.)
rule win_tinyloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.tinyloader."
        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.tinyloader"
        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 = { 7407 807c03ffc3 7402 eb42 8b4500 }
            // n = 5, score = 100
            //   7407                 | je                  9
            //   807c03ffc3           | cmp                 byte ptr [ebx + eax - 1], 0xc3
            //   7402                 | je                  4
            //   eb42                 | jmp                 0x44
            //   8b4500               | mov                 eax, dword ptr [ebp]

        $sequence_1 = { 90 8938 90 81fb04030000 730d 90 83c004 }
            // n = 7, score = 100
            //   90                   | nop                 
            //   8938                 | mov                 dword ptr [eax], edi
            //   90                   | nop                 
            //   81fb04030000         | cmp                 ebx, 0x304
            //   730d                 | jae                 0xf
            //   90                   | nop                 
            //   83c004               | add                 eax, 4

        $sequence_2 = { ebc3 8b5d00 8b4308 3b8558080000 7402 ebb3 31c0 }
            // n = 7, score = 100
            //   ebc3                 | jmp                 0xffffffc5
            //   8b5d00               | mov                 ebx, dword ptr [ebp]
            //   8b4308               | mov                 eax, dword ptr [ebx + 8]
            //   3b8558080000         | cmp                 eax, dword ptr [ebp + 0x858]
            //   7402                 | je                  4
            //   ebb3                 | jmp                 0xffffffb5
            //   31c0                 | xor                 eax, eax

        $sequence_3 = { 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_4 = { 6a40 6800300000 6800800200 6a00 ff15???????? 90 8b1d???????? }
            // n = 7, score = 100
            //   6a40                 | push                0x40
            //   6800300000           | push                0x3000
            //   6800800200           | push                0x28000
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   90                   | nop                 
            //   8b1d????????         |                     

        $sequence_5 = { 7702 eb28 83e80c 39c3 }
            // n = 4, score = 100
            //   7702                 | ja                  4
            //   eb28                 | jmp                 0x2a
            //   83e80c               | sub                 eax, 0xc
            //   39c3                 | cmp                 ebx, eax

        $sequence_6 = { e8???????? 53 68656c6c45 7865 637574 }
            // n = 5, score = 100
            //   e8????????           |                     
            //   53                   | push                ebx
            //   68656c6c45           | push                0x456c6c65
            //   7865                 | js                  0x67
            //   637574               | arpl                word ptr [ebp + 0x74], si

        $sequence_7 = { 83f8ff 7505 e9???????? 8b5d00 81c300040000 6a00 ff33 }
            // n = 7, score = 100
            //   83f8ff               | cmp                 eax, -1
            //   7505                 | jne                 7
            //   e9????????           |                     
            //   8b5d00               | mov                 ebx, dword ptr [ebp]
            //   81c300040000         | add                 ebx, 0x400
            //   6a00                 | push                0
            //   ff33                 | push                dword ptr [ebx]

        $sequence_8 = { 90 0500400100 90 31db 90 90 8bbb97114000 }
            // n = 7, score = 100
            //   90                   | nop                 
            //   0500400100           | add                 eax, 0x14000
            //   90                   | nop                 
            //   31db                 | xor                 ebx, ebx
            //   90                   | nop                 
            //   90                   | nop                 
            //   8bbb97114000         | mov                 edi, dword ptr [ebx + 0x401197]

        $sequence_9 = { 66894308 6a10 ffb5a8050000 ffb5b8050000 }
            // n = 4, score = 100
            //   66894308             | mov                 word ptr [ebx + 8], ax
            //   6a10                 | push                0x10
            //   ffb5a8050000         | push                dword ptr [ebp + 0x5a8]
            //   ffb5b8050000         | push                dword ptr [ebp + 0x5b8]

        $sequence_10 = { c3 e8???????? 894500 0500200000 8985a0050000 0500200000 }
            // n = 6, score = 100
            //   c3                   | ret                 
            //   e8????????           |                     
            //   894500               | mov                 dword ptr [ebp], eax
            //   0500200000           | add                 eax, 0x2000
            //   8985a0050000         | mov                 dword ptr [ebp + 0x5a0], eax
            //   0500200000           | add                 eax, 0x2000

        $sequence_11 = { 3b8558080000 7308 83c004 83c304 ebe6 8b5d00 8b4308 }
            // n = 7, score = 100
            //   3b8558080000         | cmp                 eax, dword ptr [ebp + 0x858]
            //   7308                 | jae                 0xa
            //   83c004               | add                 eax, 4
            //   83c304               | add                 ebx, 4
            //   ebe6                 | jmp                 0xffffffe8
            //   8b5d00               | mov                 ebx, dword ptr [ebp]
            //   8b4308               | mov                 eax, dword ptr [ebx + 8]

        $sequence_12 = { 90 31c9 90 3108 90 }
            // n = 5, score = 100
            //   90                   | nop                 
            //   31c9                 | xor                 ecx, ecx
            //   90                   | nop                 
            //   3108                 | xor                 dword ptr [eax], ecx
            //   90                   | nop                 

        $sequence_13 = { 0050ff 15???????? c705????????00010000 68???????? 68???????? }
            // n = 5, score = 100
            //   0050ff               | add                 byte ptr [eax - 1], dl
            //   15????????           |                     
            //   c705????????00010000     |     
            //   68????????           |                     
            //   68????????           |                     

        $sequence_14 = { 90 8b1d???????? 90 8998f8070000 90 8b1d???????? }
            // n = 6, score = 100
            //   90                   | nop                 
            //   8b1d????????         |                     
            //   90                   | nop                 
            //   8998f8070000         | mov                 dword ptr [eax + 0x7f8], ebx
            //   90                   | nop                 
            //   8b1d????????         |                     

        $sequence_15 = { 7368 656c 6c 3332 2e646c }
            // n = 5, score = 100
            //   7368                 | jae                 0x6a
            //   656c                 | insb                byte ptr es:[edi], dx
            //   6c                   | insb                byte ptr es:[edi], dx
            //   3332                 | xor                 esi, dword ptr [edx]
            //   2e646c               | insb                byte ptr es:[edi], dx

    condition:
        7 of them and filesize < 40960
}
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