SYMBOLCOMMON_NAMEaka. SYNONYMS
win.tinymet (Back to overview)

TinyMet

aka: TiniMet

Actor(s): Anunak, TA505


TinyMet is a meterpreter stager.

References
2021-10-21CrowdStrikeAlex Clinton, Tasha Robinson
@online{clinton:20211021:stopping:3c26152, author = {Alex Clinton and Tasha Robinson}, title = {{Stopping GRACEFUL SPIDER: Falcon Complete’s Fast Response to Recent SolarWinds Serv-U Exploit Campaign}}, date = {2021-10-21}, organization = {CrowdStrike}, url = {https://www.crowdstrike.com/blog/how-falcon-complete-stopped-a-solarwinds-serv-u-exploit-campaign/}, language = {English}, urldate = {2021-11-02} } Stopping GRACEFUL SPIDER: Falcon Complete’s Fast Response to Recent SolarWinds Serv-U Exploit Campaign
Cobalt Strike FlawedGrace TinyMet
2021-05-11CrowdStrikeThe Falcon Complete Team
@online{team:20210511:response:7e4cf2d, author = {The Falcon Complete Team}, title = {{Response When Minutes Matter: Rising Up Against Ransomware}}, date = {2021-05-11}, organization = {CrowdStrike}, url = {https://www.crowdstrike.com/blog/how-falcon-complete-stopped-a-big-game-hunting-ransomware-attack/}, language = {English}, urldate = {2021-05-13} } Response When Minutes Matter: Rising Up Against Ransomware
TinyMet
2020-12-14BluelivAlberto Marín, Carlos Rubio, Blueliv Labs Team
@online{marn:20201214:using:e81621e, author = {Alberto Marín and Carlos Rubio and Blueliv Labs Team}, title = {{Using Qiling Framework to Unpack TA505 packed samples}}, date = {2020-12-14}, organization = {Blueliv}, url = {https://www.blueliv.com/cyber-security-and-cyber-threat-intelligence-blog-blueliv/using-qiling-framework-to-unpack-ta505-packed-samples/}, language = {English}, urldate = {2020-12-15} } Using Qiling Framework to Unpack TA505 packed samples
AndroMut Azorult Silence TinyMet
2020-06-17Twitter (@VK_intel)Vitali Kremez, malwrhunterteam
@online{kremez:20200617:signed:f8eecc6, author = {Vitali Kremez and malwrhunterteam}, title = {{Tweet on signed Tinymet payload (V.02) used by TA505}}, date = {2020-06-17}, organization = {Twitter (@VK_intel)}, url = {https://twitter.com/VK_Intel/status/1273292957429510150}, language = {English}, urldate = {2020-06-18} } Tweet on signed Tinymet payload (V.02) used by TA505
TinyMet
2020-03-26TelekomThomas Barabosch
@online{barabosch:20200326:ta505s:24d9805, author = {Thomas Barabosch}, title = {{TA505's Box of Chocolate - On Hidden Gems packed with the TA505 Packer}}, date = {2020-03-26}, organization = {Telekom}, url = {https://www.telekom.com/en/blog/group/article/cybersecurity-ta505-s-box-of-chocolate-597672}, language = {English}, urldate = {2020-03-27} } TA505's Box of Chocolate - On Hidden Gems packed with the TA505 Packer
Amadey Azorult Clop FlawedGrace Get2 SDBbot Silence TinyMet TA505
2020-02-28Financial Security InstituteFinancial Security Institute
@online{institute:20200228:profiling:ebaa39b, author = {Financial Security Institute}, title = {{Profiling of TA505 Threat Group That Continues to Attack the Financial Sector}}, date = {2020-02-28}, organization = {Financial Security Institute}, url = {https://www.fsec.or.kr/common/proc/fsec/bbs/163/fileDownLoad/2297.do}, language = {English}, urldate = {2020-02-28} } Profiling of TA505 Threat Group That Continues to Attack the Financial Sector
Amadey Clop FlawedAmmyy Rapid Ransom SDBbot TinyMet
2020-02-13QianxinQi Anxin Threat Intelligence Center
@techreport{center:20200213:report:146d333, author = {Qi Anxin Threat Intelligence Center}, title = {{APT Report 2019}}, date = {2020-02-13}, institution = {Qianxin}, url = {https://ti.qianxin.com/uploads/2020/02/13/cb78386a082f465f259b37dae5df4884.pdf}, language = {English}, urldate = {2020-02-27} } APT Report 2019
Chrysaor Exodus Dacls VPNFilter DNSRat Griffon KopiLuwak More_eggs SQLRat AppleJeus BONDUPDATER Agent.BTZ Anchor AndroMut AppleJeus BOOSTWRITE Brambul Carbanak Cobalt Strike Dacls DistTrack DNSpionage Dtrack ELECTRICFISH FlawedAmmyy FlawedGrace Get2 Grateful POS HOPLIGHT Imminent Monitor RAT jason Joanap KerrDown KEYMARBLE Lambert LightNeuron LoJax MiniDuke PolyglotDuke PowerRatankba Rising Sun SDBbot ServHelper Snatch Stuxnet TinyMet tRat TrickBot Volgmer X-Agent Zebrocy
2020SecureworksSecureWorks
@online{secureworks:2020:gold:97e5784, author = {SecureWorks}, title = {{GOLD NIAGARA}}, date = {2020}, organization = {Secureworks}, url = {https://www.secureworks.com/research/threat-profiles/gold-niagara}, language = {English}, urldate = {2020-05-23} } GOLD NIAGARA
Bateleur Griffon Carbanak Cobalt Strike DRIFTPIN TinyMet FIN7
2019-08-20Github (SherifEldeeb)Sherif Eldeeb
@online{eldeeb:20190820:source:66124bb, author = {Sherif Eldeeb}, title = {{Source code: TinyMet}}, date = {2019-08-20}, organization = {Github (SherifEldeeb)}, url = {https://github.com/SherifEldeeb/TinyMet}, language = {English}, urldate = {2020-02-13} } Source code: TinyMet
TinyMet
2019-03-20FlashpointJoshua Platt, Jason Reaves
@online{platt:20190320:fin7:bac265f, author = {Joshua Platt and Jason Reaves}, title = {{FIN7 Revisited: Inside Astra Panel and SQLRat Malware}}, date = {2019-03-20}, organization = {Flashpoint}, url = {https://www.flashpoint-intel.com/blog/fin7-revisited:-inside-astra-panel-and-sqlrat-malware/}, language = {English}, urldate = {2019-12-18} } FIN7 Revisited: Inside Astra Panel and SQLRat Malware
DNSRat TinyMet
Yara Rules
[TLP:WHITE] win_tinymet_auto (20220808 | Detects win.tinymet.)
rule win_tinymet_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-08-05"
        version = "1"
        description = "Detects win.tinymet."
        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.tinymet"
        malpedia_rule_date = "20220805"
        malpedia_hash = "6ec06c64bcfdbeda64eff021c766b4ce34542b71"
        malpedia_version = "20220808"
        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 = { 83c005 56 03c7 50 ff75fc ffd3 }
            // n = 6, score = 100
            //   83c005               | add                 eax, 5
            //   56                   | push                esi
            //   03c7                 | add                 eax, edi
            //   50                   | push                eax
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   ffd3                 | call                ebx

        $sequence_1 = { 6a3e 59 f7f1 8a821c104000 }
            // n = 4, score = 100
            //   6a3e                 | push                0x3e
            //   59                   | pop                 ecx
            //   f7f1                 | div                 ecx
            //   8a821c104000         | mov                 al, byte ptr [edx + 0x40101c]

        $sequence_2 = { 51 6a00 ff15???????? 57 ff7508 }
            // n = 5, score = 100
            //   51                   | push                ecx
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   57                   | push                edi
            //   ff7508               | push                dword ptr [ebp + 8]

        $sequence_3 = { 83c9ff 8bf8 894df8 85c9 741d 8d45f8 }
            // n = 6, score = 100
            //   83c9ff               | or                  ecx, 0xffffffff
            //   8bf8                 | mov                 edi, eax
            //   894df8               | mov                 dword ptr [ebp - 8], ecx
            //   85c9                 | test                ecx, ecx
            //   741d                 | je                  0x1f
            //   8d45f8               | lea                 eax, [ebp - 8]

        $sequence_4 = { e8???????? 83c40c 6aff e8???????? cc }
            // n = 5, score = 100
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   6aff                 | push                -1
            //   e8????????           |                     
            //   cc                   | int3                

        $sequence_5 = { a1???????? 59 50 ff35???????? }
            // n = 4, score = 100
            //   a1????????           |                     
            //   59                   | pop                 ecx
            //   50                   | push                eax
            //   ff35????????         |                     

        $sequence_6 = { 56 ff15???????? 8b4df8 03d9 }
            // n = 4, score = 100
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   03d9                 | add                 ebx, ecx

        $sequence_7 = { 8bec 83ec18 53 33db 56 57 885df0 }
            // n = 7, score = 100
            //   8bec                 | mov                 ebp, esp
            //   83ec18               | sub                 esp, 0x18
            //   53                   | push                ebx
            //   33db                 | xor                 ebx, ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   885df0               | mov                 byte ptr [ebp - 0x10], bl

    condition:
        7 of them and filesize < 57344
}
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