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 APT23 APT31 APT39 APT40 BlackTech BuhTrap Charming Kitten CLOCKWORK SPIDER DOPPEL SPIDER FIN7 Gamaredon Group GOBLIN PANDA MONTY SPIDER MUSTANG PANDA NARWHAL SPIDER NOCTURNAL SPIDER PINCHY SPIDER SALTY SPIDER SCULLY SPIDER SMOKY SPIDER Thrip VENOM SPIDER VICEROY TIGER
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 (20230125 | Detects win.tinyloader.)
rule win_tinyloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 29d8 90 31db 90 31c9 }
            // n = 5, score = 100
            //   29d8                 | sub                 eax, ebx
            //   90                   | nop                 
            //   31db                 | xor                 ebx, ebx
            //   90                   | nop                 
            //   31c9                 | xor                 ecx, ecx

        $sequence_1 = { 8985a8050000 0500080000 894508 0500200000 894518 0500200000 894510 }
            // n = 7, score = 100
            //   8985a8050000         | mov                 dword ptr [ebp + 0x5a8], eax
            //   0500080000           | add                 eax, 0x800
            //   894508               | mov                 dword ptr [ebp + 8], eax
            //   0500200000           | add                 eax, 0x2000
            //   894518               | mov                 dword ptr [ebp + 0x18], eax
            //   0500200000           | add                 eax, 0x2000
            //   894510               | mov                 dword ptr [ebp + 0x10], eax

        $sequence_2 = { 81fb04030000 730d 90 83c004 }
            // n = 4, score = 100
            //   81fb04030000         | cmp                 ebx, 0x304
            //   730d                 | jae                 0xf
            //   90                   | nop                 
            //   83c004               | add                 eax, 4

        $sequence_3 = { 637574 6541 0050ff 15???????? c705????????00010000 68???????? 68???????? }
            // n = 7, score = 100
            //   637574               | arpl                word ptr [ebp + 0x74], si
            //   6541                 | inc                 ecx
            //   0050ff               | add                 byte ptr [eax - 1], dl
            //   15????????           |                     
            //   c705????????00010000     |     
            //   68????????           |                     
            //   68????????           |                     

        $sequence_4 = { 0500080000 894520 ffb5a0050000 6802020000 }
            // n = 4, score = 100
            //   0500080000           | add                 eax, 0x800
            //   894520               | mov                 dword ptr [ebp + 0x20], eax
            //   ffb5a0050000         | push                dword ptr [ebp + 0x5a0]
            //   6802020000           | push                0x202

        $sequence_5 = { 90 895830 90 8b1d???????? 90 895838 }
            // n = 6, score = 100
            //   90                   | nop                 
            //   895830               | mov                 dword ptr [eax + 0x30], ebx
            //   90                   | nop                 
            //   8b1d????????         |                     
            //   90                   | nop                 
            //   895838               | mov                 dword ptr [eax + 0x38], ebx

        $sequence_6 = { 7302 ebc3 8b5d00 8b4308 3b8558080000 7402 }
            // n = 6, score = 100
            //   7302                 | jae                 4
            //   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

        $sequence_7 = { 895838 90 89c6 90 0500400100 }
            // n = 5, score = 100
            //   895838               | mov                 dword ptr [eax + 0x38], ebx
            //   90                   | nop                 
            //   89c6                 | mov                 esi, eax
            //   90                   | nop                 
            //   0500400100           | add                 eax, 0x14000

        $sequence_8 = { 8b5510 01da 8b12 8b4500 83c00c }
            // n = 5, score = 100
            //   8b5510               | mov                 edx, dword ptr [ebp + 0x10]
            //   01da                 | add                 edx, ebx
            //   8b12                 | mov                 edx, dword ptr [edx]
            //   8b4500               | mov                 eax, dword ptr [ebp]
            //   83c00c               | add                 eax, 0xc

        $sequence_9 = { ffb5a8050000 ffb5b8050000 ff15???????? 83f8ff 7505 }
            // n = 5, score = 100
            //   ffb5a8050000         | push                dword ptr [ebp + 0x5a8]
            //   ffb5b8050000         | push                dword ptr [ebp + 0x5b8]
            //   ff15????????         |                     
            //   83f8ff               | cmp                 eax, -1
            //   7505                 | jne                 7

        $sequence_10 = { c131da 4f 75d5 f7d2 f7d1 5b 89d0 }
            // n = 7, score = 100
            //   c131da               | sal                 dword ptr [ecx], 0xda
            //   4f                   | dec                 edi
            //   75d5                 | jne                 0xffffffd7
            //   f7d2                 | not                 edx
            //   f7d1                 | not                 ecx
            //   5b                   | pop                 ebx
            //   89d0                 | mov                 eax, edx

        $sequence_11 = { 6a00 ff33 ff7500 ffb5b8050000 }
            // n = 4, score = 100
            //   6a00                 | push                0
            //   ff33                 | push                dword ptr [ebx]
            //   ff7500               | push                dword ptr [ebp]
            //   ffb5b8050000         | push                dword ptr [ebp + 0x5b8]

        $sequence_12 = { 90 8998f8070000 90 8b1d???????? 90 895830 }
            // n = 6, score = 100
            //   90                   | nop                 
            //   8998f8070000         | mov                 dword ptr [eax + 0x7f8], ebx
            //   90                   | nop                 
            //   8b1d????????         |                     
            //   90                   | nop                 
            //   895830               | mov                 dword ptr [eax + 0x30], ebx

        $sequence_13 = { 83e80c 39c3 7321 3d80020000 731a 83f800 7615 }
            // n = 7, score = 100
            //   83e80c               | sub                 eax, 0xc
            //   39c3                 | cmp                 ebx, eax
            //   7321                 | jae                 0x23
            //   3d80020000           | cmp                 eax, 0x280
            //   731a                 | jae                 0x1c
            //   83f800               | cmp                 eax, 0
            //   7615                 | jbe                 0x17

        $sequence_14 = { c78540050000000000ba 6a40 6800300000 6800400100 6a00 ff15???????? }
            // n = 6, score = 100
            //   c78540050000000000ba     | mov    dword ptr [ebp + 0x540], 0xba000000
            //   6a40                 | push                0x40
            //   6800300000           | push                0x3000
            //   6800400100           | push                0x14000
            //   6a00                 | push                0
            //   ff15????????         |                     

        $sequence_15 = { 90 8938 90 81fb04030000 }
            // n = 4, score = 100
            //   90                   | nop                 
            //   8938                 | mov                 dword ptr [eax], edi
            //   90                   | nop                 
            //   81fb04030000         | cmp                 ebx, 0x304

    condition:
        7 of them and filesize < 40960
}
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