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
2022-08-02Recorded FutureInsikt Group
@techreport{group:20220802:initial:5caddb5, author = {Insikt Group}, title = {{Initial Access Brokers Are Key to Rise in Ransomware Attacks}}, date = {2022-08-02}, institution = {Recorded Future}, url = {https://go.recordedfuture.com/hubfs/reports/cta-2022-0802.pdf}, language = {English}, urldate = {2022-08-05} } Initial Access Brokers Are Key to Rise in Ransomware Attacks
Azorult BlackMatter Conti Mars Stealer Raccoon RedLine Stealer Taurus Stealer Vidar
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 (20221125 | Detects win.taurus_stealer.)
rule win_taurus_stealer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        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 = "20221118"
        malpedia_hash = "e0702e2e6d1d00da65c8a29a4ebacd0a4c59e1af"
        malpedia_version = "20221125"
        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 = { e8???????? 8d4dde 0fb600 50 e8???????? 56 8d4ddf }
            // n = 7, score = 200
            //   e8????????           |                     
            //   8d4dde               | lea                 ecx, [ebp - 0x22]
            //   0fb600               | movzx               eax, byte ptr [eax]
            //   50                   | push                eax
            //   e8????????           |                     
            //   56                   | push                esi
            //   8d4ddf               | lea                 ecx, [ebp - 0x21]

        $sequence_1 = { 6a00 8d4c2418 51 57 53 ff742420 ffd0 }
            // n = 7, score = 200
            //   6a00                 | push                0
            //   8d4c2418             | lea                 ecx, [esp + 0x18]
            //   51                   | push                ecx
            //   57                   | push                edi
            //   53                   | push                ebx
            //   ff742420             | push                dword ptr [esp + 0x20]
            //   ffd0                 | call                eax

        $sequence_2 = { 2b06 6a30 59 99 f7f9 8b0e 6bd030 }
            // n = 7, score = 200
            //   2b06                 | sub                 eax, dword ptr [esi]
            //   6a30                 | push                0x30
            //   59                   | pop                 ecx
            //   99                   | cdq                 
            //   f7f9                 | idiv                ecx
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   6bd030               | imul                edx, eax, 0x30

        $sequence_3 = { 250f000080 7905 48 83c8f0 40 28440dd6 41 }
            // n = 7, score = 200
            //   250f000080           | and                 eax, 0x8000000f
            //   7905                 | jns                 7
            //   48                   | dec                 eax
            //   83c8f0               | or                  eax, 0xfffffff0
            //   40                   | inc                 eax
            //   28440dd6             | sub                 byte ptr [ebp + ecx - 0x2a], al
            //   41                   | inc                 ecx

        $sequence_4 = { 8b75d0 8d853cffffff 50 8d8e24080000 e8???????? 837dc810 8d45b4 }
            // n = 7, score = 200
            //   8b75d0               | mov                 esi, dword ptr [ebp - 0x30]
            //   8d853cffffff         | lea                 eax, [ebp - 0xc4]
            //   50                   | push                eax
            //   8d8e24080000         | lea                 ecx, [esi + 0x824]
            //   e8????????           |                     
            //   837dc810             | cmp                 dword ptr [ebp - 0x38], 0x10
            //   8d45b4               | lea                 eax, [ebp - 0x4c]

        $sequence_5 = { 2b4738 6a0c 99 59 f7f9 8bc8 33c0 }
            // n = 7, score = 200
            //   2b4738               | sub                 eax, dword ptr [edi + 0x38]
            //   6a0c                 | push                0xc
            //   99                   | cdq                 
            //   59                   | pop                 ecx
            //   f7f9                 | idiv                ecx
            //   8bc8                 | mov                 ecx, eax
            //   33c0                 | xor                 eax, eax

        $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 = { 50 8bcf e8???????? 8945bc b216 c745da160f4c47 33c9 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   8bcf                 | mov                 ecx, edi
            //   e8????????           |                     
            //   8945bc               | mov                 dword ptr [ebp - 0x44], eax
            //   b216                 | mov                 dl, 0x16
            //   c745da160f4c47       | mov                 dword ptr [ebp - 0x26], 0x474c0f16
            //   33c9                 | xor                 ecx, ecx

        $sequence_8 = { 7202 8b36 8b5168 8b09 e8???????? 56 ffd0 }
            // n = 7, score = 200
            //   7202                 | jb                  4
            //   8b36                 | mov                 esi, dword ptr [esi]
            //   8b5168               | mov                 edx, dword ptr [ecx + 0x68]
            //   8b09                 | mov                 ecx, dword ptr [ecx]
            //   e8????????           |                     
            //   56                   | push                esi
            //   ffd0                 | call                eax

        $sequence_9 = { 83c610 e8???????? 56 8d4dd8 51 50 8d8d7cfeffff }
            // n = 7, score = 200
            //   83c610               | add                 esi, 0x10
            //   e8????????           |                     
            //   56                   | push                esi
            //   8d4dd8               | lea                 ecx, [ebp - 0x28]
            //   51                   | push                ecx
            //   50                   | push                eax
            //   8d8d7cfeffff         | lea                 ecx, [ebp - 0x184]

    condition:
        7 of them and filesize < 524288
}
Download all Yara Rules