SYMBOLCOMMON_NAMEaka. SYNONYMS
win.thanatos_ransom (Back to overview)

Thanatos Ransomware


There is no description at this point.

References
2018-06-26Cisco TalosEdmund Brumaghin, Earl Carter, Andrew Williams
@online{brumaghin:20180626:files:661b639, author = {Edmund Brumaghin and Earl Carter and Andrew Williams}, title = {{Files Cannot Be Decrypted? Challenge Accepted. Talos Releases ThanatosDecryptor}}, date = {2018-06-26}, organization = {Cisco Talos}, url = {https://blog.talosintelligence.com/2018/06/ThanatosDecryptor.html}, language = {English}, urldate = {2020-01-09} } Files Cannot Be Decrypted? Challenge Accepted. Talos Releases ThanatosDecryptor
Thanatos Ransomware
2018-06-26Bleeping ComputerLawrence Abrams
@online{abrams:20180626:thanatos:bbe20fc, author = {Lawrence Abrams}, title = {{Thanatos Ransomware Decryptor Released by the Cisco Talos Group}}, date = {2018-06-26}, organization = {Bleeping Computer}, url = {https://www.bleepingcomputer.com/news/security/thanatos-ransomware-decryptor-released-by-the-cisco-talos-group/}, language = {English}, urldate = {2019-12-20} } Thanatos Ransomware Decryptor Released by the Cisco Talos Group
Thanatos Ransomware
2018-02-26Bleeping ComputerLawrence Abrams
@online{abrams:20180226:thanatos:546a986, author = {Lawrence Abrams}, title = {{Thanatos Ransomware Is First to Use Bitcoin Cash. Messes Up Encryption}}, date = {2018-02-26}, organization = {Bleeping Computer}, url = {https://www.bleepingcomputer.com/news/security/thanatos-ransomware-is-first-to-use-bitcoin-cash-messes-up-encryption/}, language = {English}, urldate = {2019-12-20} } Thanatos Ransomware Is First to Use Bitcoin Cash. Messes Up Encryption
Thanatos Ransomware
Yara Rules
[TLP:WHITE] win_thanatos_ransom_auto (20220411 | Detects win.thanatos_ransom.)
rule win_thanatos_ransom_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        version = "1"
        description = "Detects win.thanatos_ransom."
        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.thanatos_ransom"
        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 = { f685d0fdffff1f 7564 8b47fc 3bc7 735d }
            // n = 5, score = 100
            //   f685d0fdffff1f       | test                byte ptr [ebp - 0x230], 0x1f
            //   7564                 | jne                 0x66
            //   8b47fc               | mov                 eax, dword ptr [edi - 4]
            //   3bc7                 | cmp                 eax, edi
            //   735d                 | jae                 0x5f

        $sequence_1 = { 8904bde0774300 85c0 7514 6a0c 5e 8975e4 c745fcfeffffff }
            // n = 7, score = 100
            //   8904bde0774300       | mov                 dword ptr [edi*4 + 0x4377e0], eax
            //   85c0                 | test                eax, eax
            //   7514                 | jne                 0x16
            //   6a0c                 | push                0xc
            //   5e                   | pop                 esi
            //   8975e4               | mov                 dword ptr [ebp - 0x1c], esi
            //   c745fcfeffffff       | mov                 dword ptr [ebp - 4], 0xfffffffe

        $sequence_2 = { 0200 f00000 00d0 33d4 33d8 33dc }
            // n = 6, score = 100
            //   0200                 | add                 al, byte ptr [eax]
            //   f00000               | lock add            byte ptr [eax], al
            //   00d0                 | add                 al, dl
            //   33d4                 | xor                 edx, esp
            //   33d8                 | xor                 ebx, eax
            //   33dc                 | xor                 ebx, esp

        $sequence_3 = { 8b4568 c745500f000000 c7454c00000000 c6453c00 83f810 7242 8b4d54 }
            // n = 7, score = 100
            //   8b4568               | mov                 eax, dword ptr [ebp + 0x68]
            //   c745500f000000       | mov                 dword ptr [ebp + 0x50], 0xf
            //   c7454c00000000       | mov                 dword ptr [ebp + 0x4c], 0
            //   c6453c00             | mov                 byte ptr [ebp + 0x3c], 0
            //   83f810               | cmp                 eax, 0x10
            //   7242                 | jb                  0x44
            //   8b4d54               | mov                 ecx, dword ptr [ebp + 0x54]

        $sequence_4 = { 85c0 0f8418020000 6a00 53 ff15???????? 85c0 }
            // n = 6, score = 100
            //   85c0                 | test                eax, eax
            //   0f8418020000         | je                  0x21e
            //   6a00                 | push                0
            //   53                   | push                ebx
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax

        $sequence_5 = { c7461000000000 c60600 80bdf8feffff00 7504 33c9 eb16 8d8df8feffff }
            // n = 7, score = 100
            //   c7461000000000       | mov                 dword ptr [esi + 0x10], 0
            //   c60600               | mov                 byte ptr [esi], 0
            //   80bdf8feffff00       | cmp                 byte ptr [ebp - 0x108], 0
            //   7504                 | jne                 6
            //   33c9                 | xor                 ecx, ecx
            //   eb16                 | jmp                 0x18
            //   8d8df8feffff         | lea                 ecx, dword ptr [ebp - 0x108]

        $sequence_6 = { eb0c 0fb6c0 0fbe80a0684300 03c8 83c601 }
            // n = 5, score = 100
            //   eb0c                 | jmp                 0xe
            //   0fb6c0               | movzx               eax, al
            //   0fbe80a0684300       | movsx               eax, byte ptr [eax + 0x4368a0]
            //   03c8                 | add                 ecx, eax
            //   83c601               | add                 esi, 1

        $sequence_7 = { 6a00 6810040000 c785f4feffff00000000 ff15???????? }
            // n = 4, score = 100
            //   6a00                 | push                0
            //   6810040000           | push                0x410
            //   c785f4feffff00000000     | mov    dword ptr [ebp - 0x10c], 0
            //   ff15????????         |                     

        $sequence_8 = { eb06 8b35???????? ffb568ffffff ffd6 }
            // n = 4, score = 100
            //   eb06                 | jmp                 8
            //   8b35????????         |                     
            //   ffb568ffffff         | push                dword ptr [ebp - 0x98]
            //   ffd6                 | call                esi

        $sequence_9 = { 750c 8a06 8d8d8cfcffff 3a01 }
            // n = 4, score = 100
            //   750c                 | jne                 0xe
            //   8a06                 | mov                 al, byte ptr [esi]
            //   8d8d8cfcffff         | lea                 ecx, dword ptr [ebp - 0x374]
            //   3a01                 | cmp                 al, byte ptr [ecx]

    condition:
        7 of them and filesize < 516096
}
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