SYMBOLCOMMON_NAMEaka. SYNONYMS
win.taurus_stealer (Back to overview)

Taurus Stealer


According to Zscaler, Taurus is a stealer that surfaced in June 2020. It is being developed by the author(s) that previously created Predator the Thief. The name overlaps partly with the StealerOne / Terra* family (also aliased Taurus Loader) but appears to be a completely disjunct project.

References
2021-06-02MorphisecMichael Gorelik
@online{gorelik:20210602:google:eb1bf13, author = {Michael Gorelik}, title = {{Google PPC Ads Deliver Redline, Taurus, and mini-Redline Infostealers}}, date = {2021-06-02}, organization = {Morphisec}, url = {https://blog.morphisec.com/google-ppc-ads-deliver-redline-taurus-and-mini-redline-infostealers}, language = {English}, urldate = {2021-06-16} } Google PPC Ads Deliver Redline, Taurus, and mini-Redline Infostealers
RedLine Stealer Taurus Stealer
2021-05-07BluelivAlberto Marín
@online{marn:20210507:indepth:1b9ec2f, author = {Alberto Marín}, title = {{An In-Depth analysis of the new Taurus Stealer}}, date = {2021-05-07}, organization = {Blueliv}, url = {https://www.blueliv.com/cyber-security-and-cyber-threat-intelligence-blog-blueliv/an-in-depth-analysis-of-the-new-taurus-stealer/}, language = {English}, urldate = {2021-05-13} } An In-Depth analysis of the new Taurus Stealer
Taurus Stealer
2021-03-15MinervaLabsTom Roter
@online{roter:20210315:taurus:c3ab709, author = {Tom Roter}, title = {{Taurus Stealer's Evolution}}, date = {2021-03-15}, organization = {MinervaLabs}, url = {https://blog.minerva-labs.com/taurus-stealers-evolution}, language = {English}, urldate = {2021-03-31} } Taurus Stealer's Evolution
Taurus Stealer
2020-09-07Github (StrangerealIntel)StrangerealIntel
@online{strangerealintel:20200907:time:07064dc, author = {StrangerealIntel}, title = {{Time to take the bull by the horns}}, date = {2020-09-07}, organization = {Github (StrangerealIntel)}, url = {https://github.com/StrangerealIntel/CyberThreatIntel/blob/master/Additional%20Analysis/UnknownTA/2020-09-07/Analysis.md}, language = {English}, urldate = {2020-09-15} } Time to take the bull by the horns
RedLine Stealer Taurus Stealer
2020-06-26ZscalerAvinash Kumar, Uday Pratap Singh
@online{kumar:20200626:taurus:4d00888, author = {Avinash Kumar and Uday Pratap Singh}, title = {{Taurus: The New Stealer in Town}}, date = {2020-06-26}, organization = {Zscaler}, url = {https://www.zscaler.com/blogs/research/taurus-new-stealer-town}, language = {English}, urldate = {2020-08-13} } Taurus: The New Stealer in Town
Taurus Stealer
Yara Rules
[TLP:WHITE] win_taurus_stealer_auto (20220411 | Detects win.taurus_stealer.)
rule win_taurus_stealer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        version = "1"
        description = "Detects win.taurus_stealer."
        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.taurus_stealer"
        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 = { 8d4de8 e8???????? 8d4db8 e8???????? 51 8b7dec 8d4db8 }
            // n = 7, score = 200
            //   8d4de8               | lea                 ecx, dword ptr [ebp - 0x18]
            //   e8????????           |                     
            //   8d4db8               | lea                 ecx, dword ptr [ebp - 0x48]
            //   e8????????           |                     
            //   51                   | push                ecx
            //   8b7dec               | mov                 edi, dword ptr [ebp - 0x14]
            //   8d4db8               | lea                 ecx, dword ptr [ebp - 0x48]

        $sequence_1 = { 8d4df5 8bd0 51 8d4d94 e8???????? 59 50 }
            // n = 7, score = 200
            //   8d4df5               | lea                 ecx, dword ptr [ebp - 0xb]
            //   8bd0                 | mov                 edx, eax
            //   51                   | push                ecx
            //   8d4d94               | lea                 ecx, dword ptr [ebp - 0x6c]
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   50                   | push                eax

        $sequence_2 = { ebf1 8d4718 8855ec 50 8d55e5 8d4db4 e8???????? }
            // n = 7, score = 200
            //   ebf1                 | jmp                 0xfffffff3
            //   8d4718               | lea                 eax, dword ptr [edi + 0x18]
            //   8855ec               | mov                 byte ptr [ebp - 0x14], dl
            //   50                   | push                eax
            //   8d55e5               | lea                 edx, dword ptr [ebp - 0x1b]
            //   8d4db4               | lea                 ecx, dword ptr [ebp - 0x4c]
            //   e8????????           |                     

        $sequence_3 = { 8bc4 ff7508 50 e8???????? 8d9510ffffff 8d8d70ffffff e8???????? }
            // n = 7, score = 200
            //   8bc4                 | mov                 eax, esp
            //   ff7508               | push                dword ptr [ebp + 8]
            //   50                   | push                eax
            //   e8????????           |                     
            //   8d9510ffffff         | lea                 edx, dword ptr [ebp - 0xf0]
            //   8d8d70ffffff         | lea                 ecx, dword ptr [ebp - 0x90]
            //   e8????????           |                     

        $sequence_4 = { 8d8c2494000000 e8???????? 8d8c2420020000 e8???????? 8d8c2408020000 e8???????? 8d8c2438020000 }
            // n = 7, score = 200
            //   8d8c2494000000       | lea                 ecx, dword ptr [esp + 0x94]
            //   e8????????           |                     
            //   8d8c2420020000       | lea                 ecx, dword ptr [esp + 0x220]
            //   e8????????           |                     
            //   8d8c2408020000       | lea                 ecx, dword ptr [esp + 0x208]
            //   e8????????           |                     
            //   8d8c2438020000       | lea                 ecx, dword ptr [esp + 0x238]

        $sequence_5 = { 40 83f80a 7305 8a4df0 ebf1 8d4df1 c645fb00 }
            // n = 7, score = 200
            //   40                   | inc                 eax
            //   83f80a               | cmp                 eax, 0xa
            //   7305                 | jae                 7
            //   8a4df0               | mov                 cl, byte ptr [ebp - 0x10]
            //   ebf1                 | jmp                 0xfffffff3
            //   8d4df1               | lea                 ecx, dword ptr [ebp - 0xf]
            //   c645fb00             | mov                 byte ptr [ebp - 5], 0

        $sequence_6 = { 7305 8a4dec ebf1 8855ef b00f c7459f0f585f49 8bca }
            // n = 7, score = 200
            //   7305                 | jae                 7
            //   8a4dec               | mov                 cl, byte ptr [ebp - 0x14]
            //   ebf1                 | jmp                 0xfffffff3
            //   8855ef               | mov                 byte ptr [ebp - 0x11], dl
            //   b00f                 | mov                 al, 0xf
            //   c7459f0f585f49       | mov                 dword ptr [ebp - 0x61], 0x495f580f
            //   8bca                 | mov                 ecx, edx

        $sequence_7 = { 8d8d58ffffff 83cb40 e8???????? 8b5514 8bf0 51 }
            // n = 6, score = 200
            //   8d8d58ffffff         | lea                 ecx, dword ptr [ebp - 0xa8]
            //   83cb40               | or                  ebx, 0x40
            //   e8????????           |                     
            //   8b5514               | mov                 edx, dword ptr [ebp + 0x14]
            //   8bf0                 | mov                 esi, eax
            //   51                   | push                ecx

        $sequence_8 = { 50 8d55d9 8d4db4 e8???????? 59 8d4df5 8bd0 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   8d55d9               | lea                 edx, dword ptr [ebp - 0x27]
            //   8d4db4               | lea                 ecx, dword ptr [ebp - 0x4c]
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   8d4df5               | lea                 ecx, dword ptr [ebp - 0xb]
            //   8bd0                 | mov                 edx, eax

        $sequence_9 = { 837f1410 7202 8b3f 8b96fc000000 8b8ef8000000 e8???????? 8d4dfc }
            // n = 7, score = 200
            //   837f1410             | cmp                 dword ptr [edi + 0x14], 0x10
            //   7202                 | jb                  4
            //   8b3f                 | mov                 edi, dword ptr [edi]
            //   8b96fc000000         | mov                 edx, dword ptr [esi + 0xfc]
            //   8b8ef8000000         | mov                 ecx, dword ptr [esi + 0xf8]
            //   e8????????           |                     
            //   8d4dfc               | lea                 ecx, dword ptr [ebp - 4]

    condition:
        7 of them and filesize < 524288
}
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