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 (20211008 | Detects win.tinyloader.)
rule win_tinyloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-10-07"
        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 = "20211007"
        malpedia_hash = "e5b790e0f888f252d49063a1251ca60ec2832535"
        malpedia_version = "20211008"
        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 = { ff15???????? 8d9d40050000 53 50 ff95b0020000 83bd4005000001 }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   8d9d40050000         | lea                 ebx, dword ptr [ebp + 0x540]
            //   53                   | push                ebx
            //   50                   | push                eax
            //   ff95b0020000         | call                dword ptr [ebp + 0x2b0]
            //   83bd4005000001       | cmp                 dword ptr [ebp + 0x540], 1

        $sequence_1 = { 730c 90 83c004 90 }
            // n = 4, score = 100
            //   730c                 | jae                 0xe
            //   90                   | nop                 
            //   83c004               | add                 eax, 4
            //   90                   | nop                 

        $sequence_2 = { 83c004 83c304 ebe6 8b5d00 8b4308 83f800 }
            // n = 6, score = 100
            //   83c004               | add                 eax, 4
            //   83c304               | add                 ebx, 4
            //   ebe6                 | jmp                 0xffffffe8
            //   8b5d00               | mov                 ebx, dword ptr [ebp]
            //   8b4308               | mov                 eax, dword ptr [ebx + 8]
            //   83f800               | cmp                 eax, 0

        $sequence_3 = { 8985a0050000 0500200000 8985a8050000 0500080000 894508 0500200000 }
            // n = 6, score = 100
            //   8985a0050000         | mov                 dword ptr [ebp + 0x5a0], eax
            //   0500200000           | add                 eax, 0x2000
            //   8985a8050000         | mov                 dword ptr [ebp + 0x5a8], eax
            //   0500080000           | add                 eax, 0x800
            //   894508               | mov                 dword ptr [ebp + 8], eax
            //   0500200000           | add                 eax, 0x2000

        $sequence_4 = { 01da 8b12 8b4500 83c00c 891418 }
            // n = 5, score = 100
            //   01da                 | add                 edx, ebx
            //   8b12                 | mov                 edx, dword ptr [edx]
            //   8b4500               | mov                 eax, dword ptr [ebp]
            //   83c00c               | add                 eax, 0xc
            //   891418               | mov                 dword ptr [eax + ebx], edx

        $sequence_5 = { 8b5d00 894308 8b85f8070000 8b5d00 894304 }
            // n = 5, score = 100
            //   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_6 = { 894304 8b5d00 83bb0004000000 750a }
            // n = 4, score = 100
            //   894304               | mov                 dword ptr [ebx + 4], eax
            //   8b5d00               | mov                 ebx, dword ptr [ebp]
            //   83bb0004000000       | cmp                 dword ptr [ebx + 0x400], 0
            //   750a                 | jne                 0xc

        $sequence_7 = { 68???????? 68???????? ff15???????? 68???????? ff15???????? 8d3500304000 89c7 }
            // n = 7, score = 100
            //   68????????           |                     
            //   68????????           |                     
            //   ff15????????         |                     
            //   68????????           |                     
            //   ff15????????         |                     
            //   8d3500304000         | lea                 esi, dword ptr [0x403000]
            //   89c7                 | mov                 edi, eax

        $sequence_8 = { 89d0 c1c010 6689c8 90 }
            // n = 4, score = 100
            //   89d0                 | mov                 eax, edx
            //   c1c010               | rol                 eax, 0x10
            //   6689c8               | mov                 ax, cx
            //   90                   | nop                 

        $sequence_9 = { c70000000000 c7855808000000000000 8b5d00 039d58080000 6a00 6800040000 53 }
            // n = 7, score = 100
            //   c70000000000         | mov                 dword ptr [eax], 0
            //   c7855808000000000000     | mov    dword ptr [ebp + 0x858], 0
            //   8b5d00               | mov                 ebx, dword ptr [ebp]
            //   039d58080000         | add                 ebx, dword ptr [ebp + 0x858]
            //   6a00                 | push                0
            //   6800040000           | push                0x400
            //   53                   | push                ebx

        $sequence_10 = { 90 895830 90 8b1d???????? 90 }
            // n = 5, score = 100
            //   90                   | nop                 
            //   895830               | mov                 dword ptr [eax + 0x30], ebx
            //   90                   | nop                 
            //   8b1d????????         |                     
            //   90                   | nop                 

        $sequence_11 = { 8b4d00 8b4904 8b5500 01da 83c20c 310a }
            // n = 6, score = 100
            //   8b4d00               | mov                 ecx, dword ptr [ebp]
            //   8b4904               | mov                 ecx, dword ptr [ecx + 4]
            //   8b5500               | mov                 edx, dword ptr [ebp]
            //   01da                 | add                 edx, ebx
            //   83c20c               | add                 edx, 0xc
            //   310a                 | xor                 dword ptr [edx], ecx

        $sequence_12 = { e8???????? 53 68656c6c45 7865 637574 6541 0050ff }
            // n = 7, score = 100
            //   e8????????           |                     
            //   53                   | push                ebx
            //   68656c6c45           | push                0x456c6c65
            //   7865                 | js                  0x67
            //   637574               | arpl                word ptr [ebp + 0x74], si
            //   6541                 | inc                 ecx
            //   0050ff               | add                 byte ptr [eax - 1], dl

        $sequence_13 = { 90 8b1d???????? 90 8998f8070000 90 8b1d???????? 90 }
            // n = 7, score = 100
            //   90                   | nop                 
            //   8b1d????????         |                     
            //   90                   | nop                 
            //   8998f8070000         | mov                 dword ptr [eax + 0x7f8], ebx
            //   90                   | nop                 
            //   8b1d????????         |                     
            //   90                   | nop                 

        $sequence_14 = { 895838 90 89c6 90 }
            // n = 4, score = 100
            //   895838               | mov                 dword ptr [eax + 0x38], ebx
            //   90                   | nop                 
            //   89c6                 | mov                 esi, eax
            //   90                   | nop                 

        $sequence_15 = { 8bbb97114000 90 8938 90 81fb04030000 730d 90 }
            // n = 7, score = 100
            //   8bbb97114000         | mov                 edi, dword ptr [ebx + 0x401197]
            //   90                   | nop                 
            //   8938                 | mov                 dword ptr [eax], edi
            // 
            //   81fb04030000         | cmp                 ebx, 0x304
            //   730d                 | jae                 0xf
            //   90                   | nop                 

    condition:
        7 of them and filesize < 40960
}
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