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
2023-05-16SecureworksCounter Threat Unit ResearchTeam
@online{researchteam:20230516:growing:c703021, author = {Counter Threat Unit ResearchTeam}, title = {{The Growing Threat from Infostealers}}, date = {2023-05-16}, organization = {Secureworks}, url = {https://www.secureworks.com/research/the-growing-threat-from-infostealers}, language = {English}, urldate = {2023-07-31} } The Growing Threat from Infostealers
Graphiron GraphSteel Raccoon RedLine Stealer Rhadamanthys Taurus Stealer Vidar
2023-02-03AonZachary Reichert
@online{reichert:20230203:agentvx:21829c8, author = {Zachary Reichert}, title = {{AgentVX And Taurus}}, date = {2023-02-03}, organization = {Aon}, url = {https://www.aon.com/cyber-solutions/aon_cyber_labs/agentvx-and-taurus/}, language = {English}, urldate = {2023-05-02} } AgentVX And Taurus
Taurus Stealer
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://outpost24.com/blog/an-in-depth-analysis-of-the-new-taurus-stealer/}, language = {English}, urldate = {2023-08-07} } 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 (20230715 | Detects win.taurus_stealer.)
rule win_taurus_stealer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        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 = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 8b4604 3906 7512 8b4508 33ff 8938 897804 }
            // n = 7, score = 200
            //   8b4604               | mov                 eax, dword ptr [esi + 4]
            //   3906                 | cmp                 dword ptr [esi], eax
            //   7512                 | jne                 0x14
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   33ff                 | xor                 edi, edi
            //   8938                 | mov                 dword ptr [eax], edi
            //   897804               | mov                 dword ptr [eax + 4], edi

        $sequence_1 = { 03fb 8b5df0 81e100ff00ff c1c008 25ff00ff00 8955e0 0bc8 }
            // n = 7, score = 200
            //   03fb                 | add                 edi, ebx
            //   8b5df0               | mov                 ebx, dword ptr [ebp - 0x10]
            //   81e100ff00ff         | and                 ecx, 0xff00ff00
            //   c1c008               | rol                 eax, 8
            //   25ff00ff00           | and                 eax, 0xff00ff
            //   8955e0               | mov                 dword ptr [ebp - 0x20], edx
            //   0bc8                 | or                  ecx, eax

        $sequence_2 = { 88442423 58 885c241c c644241d4d 66c74424207573 88442422 66c74424237d00 }
            // n = 7, score = 200
            //   88442423             | mov                 byte ptr [esp + 0x23], al
            //   58                   | pop                 eax
            //   885c241c             | mov                 byte ptr [esp + 0x1c], bl
            //   c644241d4d           | mov                 byte ptr [esp + 0x1d], 0x4d
            //   66c74424207573       | mov                 word ptr [esp + 0x20], 0x7375
            //   88442422             | mov                 byte ptr [esp + 0x22], al
            //   66c74424237d00       | mov                 word ptr [esp + 0x23], 0x7d

        $sequence_3 = { c645ff00 8d5101 8a01 41 84c0 75f9 2bca }
            // n = 7, score = 200
            //   c645ff00             | mov                 byte ptr [ebp - 1], 0
            //   8d5101               | lea                 edx, [ecx + 1]
            //   8a01                 | mov                 al, byte ptr [ecx]
            //   41                   | inc                 ecx
            //   84c0                 | test                al, al
            //   75f9                 | jne                 0xfffffffb
            //   2bca                 | sub                 ecx, edx

        $sequence_4 = { c645f500 f6c301 740b 8d8df0feffff e8???????? 807df500 0f846a060000 }
            // n = 7, score = 200
            //   c645f500             | mov                 byte ptr [ebp - 0xb], 0
            //   f6c301               | test                bl, 1
            //   740b                 | je                  0xd
            //   8d8df0feffff         | lea                 ecx, [ebp - 0x110]
            //   e8????????           |                     
            //   807df500             | cmp                 byte ptr [ebp - 0xb], 0
            //   0f846a060000         | je                  0x670

        $sequence_5 = { 8d4dcb 8845cf e8???????? 6a69 8d4dcb 8845d0 e8???????? }
            // n = 7, score = 200
            //   8d4dcb               | lea                 ecx, [ebp - 0x35]
            //   8845cf               | mov                 byte ptr [ebp - 0x31], al
            //   e8????????           |                     
            //   6a69                 | push                0x69
            //   8d4dcb               | lea                 ecx, [ebp - 0x35]
            //   8845d0               | mov                 byte ptr [ebp - 0x30], al
            //   e8????????           |                     

        $sequence_6 = { e8???????? 50 8d8c244c010000 e8???????? 389c249f0f0000 8d8c2448010000 0f95c0 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   50                   | push                eax
            //   8d8c244c010000       | lea                 ecx, [esp + 0x14c]
            //   e8????????           |                     
            //   389c249f0f0000       | cmp                 byte ptr [esp + 0xf9f], bl
            //   8d8c2448010000       | lea                 ecx, [esp + 0x148]
            //   0f95c0               | setne               al

        $sequence_7 = { e8???????? 8d45b4 50 8d4b30 e8???????? 8b4508 83400448 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   8d45b4               | lea                 eax, [ebp - 0x4c]
            //   50                   | push                eax
            //   8d4b30               | lea                 ecx, [ebx + 0x30]
            //   e8????????           |                     
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   83400448             | add                 dword ptr [eax + 4], 0x48

        $sequence_8 = { 56 8d4df4 e8???????? 8d4df3 0fb600 50 e8???????? }
            // n = 7, score = 200
            //   56                   | push                esi
            //   8d4df4               | lea                 ecx, [ebp - 0xc]
            //   e8????????           |                     
            //   8d4df3               | lea                 ecx, [ebp - 0xd]
            //   0fb600               | movzx               eax, byte ptr [eax]
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_9 = { 8d82dcbc1b8f 03c1 8b7df8 8b4dc4 8bd0 334dc0 334df4 }
            // n = 7, score = 200
            //   8d82dcbc1b8f         | lea                 eax, [edx - 0x70e44324]
            //   03c1                 | add                 eax, ecx
            //   8b7df8               | mov                 edi, dword ptr [ebp - 8]
            //   8b4dc4               | mov                 ecx, dword ptr [ebp - 0x3c]
            //   8bd0                 | mov                 edx, eax
            //   334dc0               | xor                 ecx, dword ptr [ebp - 0x40]
            //   334df4               | xor                 ecx, dword ptr [ebp - 0xc]

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