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 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 (20220411 | Detects win.tinyloader.)
rule win_tinyloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        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 = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { 83f8ff 7505 e9???????? 8b4500 83c008 c70000000000 c7855808000000000000 }
            // n = 7, score = 100
            //   83f8ff               | cmp                 eax, -1
            //   7505                 | jne                 7
            //   e9????????           |                     
            //   8b4500               | mov                 eax, dword ptr [ebp]
            //   83c008               | add                 eax, 8
            //   c70000000000         | mov                 dword ptr [eax], 0
            //   c7855808000000000000     | mov    dword ptr [ebp + 0x858], 0

        $sequence_1 = { 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_2 = { 31db 90 31c9 90 }
            // n = 4, score = 100
            //   31db                 | xor                 ebx, ebx
            //   90                   | nop                 
            //   31c9                 | xor                 ecx, ecx
            //   90                   | nop                 

        $sequence_3 = { e9???????? 8b5d00 81c300040000 6a00 ff33 ff7500 }
            // n = 6, score = 100
            //   e9????????           |                     
            //   8b5d00               | mov                 ebx, dword ptr [ebp]
            //   81c300040000         | add                 ebx, 0x400
            //   6a00                 | push                0
            //   ff33                 | push                dword ptr [ebx]
            //   ff7500               | push                dword ptr [ebp]

        $sequence_4 = { ff15???????? 8d9d40050000 53 50 }
            // n = 4, score = 100
            //   ff15????????         |                     
            //   8d9d40050000         | lea                 ebx, dword ptr [ebp + 0x540]
            //   53                   | push                ebx
            //   50                   | push                eax

        $sequence_5 = { ff15???????? 8d3500304000 89c7 53 31c9 49 89ca }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   8d3500304000         | lea                 esi, dword ptr [0x403000]
            //   89c7                 | mov                 edi, eax
            //   53                   | push                ebx
            //   31c9                 | xor                 ecx, ecx
            //   49                   | dec                 ecx
            //   89ca                 | mov                 edx, ecx

        $sequence_6 = { 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_7 = { 31db 31c9 31d2 8b4d00 8b4904 8b5500 }
            // n = 6, score = 100
            //   31db                 | xor                 ebx, ebx
            //   31c9                 | xor                 ecx, ecx
            //   31d2                 | xor                 edx, edx
            //   8b4d00               | mov                 ecx, dword ptr [ebp]
            //   8b4904               | mov                 ecx, dword ptr [ecx + 4]
            //   8b5500               | mov                 edx, dword ptr [ebp]

        $sequence_8 = { 90 31db 90 90 8bbb97114000 90 8938 }
            // n = 7, score = 100
            //   90                   | nop                 
            //   31db                 | xor                 ebx, ebx
            //   90                   | nop                 
            //   90                   | nop                 
            //   8bbb97114000         | mov                 edi, dword ptr [ebx + 0x401197]
            //   90                   | nop                 
            //   8938                 | mov                 dword ptr [eax], edi

        $sequence_9 = { 8b5d00 66894308 6a10 ffb5a8050000 }
            // n = 4, score = 100
            //   8b5d00               | mov                 ebx, dword ptr [ebp]
            //   66894308             | mov                 word ptr [ebx + 8], ax
            //   6a10                 | push                0x10
            //   ffb5a8050000         | push                dword ptr [ebp + 0x5a8]

        $sequence_10 = { 8b4308 83f800 7407 807c03ffc3 7402 eb42 }
            // n = 6, score = 100
            //   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
            //   eb42                 | jmp                 0x44

        $sequence_11 = { 8985b0020000 83bdb002000000 7502 eb1f ff15???????? 8d9d40050000 }
            // n = 6, score = 100
            //   8985b0020000         | mov                 dword ptr [ebp + 0x2b0], eax
            //   83bdb002000000       | cmp                 dword ptr [ebp + 0x2b0], 0
            //   7502                 | jne                 4
            //   eb1f                 | jmp                 0x21
            //   ff15????????         |                     
            //   8d9d40050000         | lea                 ebx, dword ptr [ebp + 0x540]

        $sequence_12 = { 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_13 = { 8998f8070000 90 8b1d???????? 90 895830 }
            // n = 5, score = 100
            //   8998f8070000         | mov                 dword ptr [eax + 0x7f8], ebx
            //   90                   | nop                 
            //   8b1d????????         |                     
            //   90                   | nop                 
            //   895830               | mov                 dword ptr [eax + 0x30], ebx

        $sequence_14 = { 89c6 90 0500400100 90 31db }
            // n = 5, score = 100
            //   89c6                 | mov                 esi, eax
            //   90                   | nop                 
            //   0500400100           | add                 eax, 0x14000
            //   90                   | nop                 
            //   31db                 | xor                 ebx, ebx

        $sequence_15 = { 740e 83fb00 7509 90 3108 90 41 }
            // n = 7, score = 100
            //   740e                 | je                  0x10
            //   83fb00               | cmp                 ebx, 0
            //   7509                 | jne                 0xb
            //   90                   | nop                 
            //   3108                 | xor                 dword ptr [eax], ecx
            //   90                   | nop                 
            //   41                   | inc                 ecx

    condition:
        7 of them and filesize < 40960
}
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