SYMBOLCOMMON_NAMEaka. SYNONYMS
win.vhd_ransomware (Back to overview)

VHD Ransomware


There is no description at this point.

References
2022-06-23TrellixChristiaan Beek
@online{beek:20220623:sound:31e77bd, author = {Christiaan Beek}, title = {{The Sound of Malware}}, date = {2022-06-23}, organization = {Trellix}, url = {https://www.trellix.com/en-us/about/newsroom/stories/threat-labs/the-sound-of-malware.html}, language = {English}, urldate = {2022-06-27} } The Sound of Malware
Conti VHD Ransomware
2022-05-03TrellixChristiaan Beek
@online{beek:20220503:hermit:70ec592, author = {Christiaan Beek}, title = {{The Hermit Kingdom’s Ransomware play}}, date = {2022-05-03}, organization = {Trellix}, url = {https://www.trellix.com/en-us/about/newsroom/stories/threat-labs/the-hermit-kingdoms-ransomware-play.html}, language = {English}, urldate = {2022-05-04} } The Hermit Kingdom’s Ransomware play
VHD Ransomware
2021-08-17Seguranca InformaticaPedro Tavares
@online{tavares:20210817:secrets:e82be35, author = {Pedro Tavares}, title = {{Secrets behind the Lazarus’s VHD ransomware}}, date = {2021-08-17}, organization = {Seguranca Informatica}, url = {https://seguranca-informatica.pt/secrets-behind-the-lazaruss-vhd-ransomware/}, language = {English}, urldate = {2021-08-24} } Secrets behind the Lazarus’s VHD ransomware
VHD Ransomware
2020-07-29Kaspersky LabsGReAT
@online{great:20200729:trends:6810325, author = {GReAT}, title = {{APT trends report Q2 2020}}, date = {2020-07-29}, organization = {Kaspersky Labs}, url = {https://securelist.com/apt-trends-report-q2-2020/97937/}, language = {English}, urldate = {2020-07-30} } APT trends report Q2 2020
PhantomLance Dacls Penquin Turla elf.wellmess AppleJeus Dacls AcidBox Cobalt Strike Dacls EternalPetya Godlike12 Olympic Destroyer PlugX shadowhammer ShadowPad Sinowal VHD Ransomware Volgmer WellMess X-Agent XTunnel
2020-07-28Kaspersky LabsIvan Kwiatkowski, Pierre Delcher, Félix Aime
@online{kwiatkowski:20200728:lazarus:5b1523a, author = {Ivan Kwiatkowski and Pierre Delcher and Félix Aime}, title = {{Lazarus on the hunt for big game}}, date = {2020-07-28}, organization = {Kaspersky Labs}, url = {https://securelist.com/lazarus-on-the-hunt-for-big-game/97757/}, language = {English}, urldate = {2020-07-30} } Lazarus on the hunt for big game
Dacls Dacls Dacls VHD Ransomware
2020-03-22GrujaRS
@online{grujars:20200322:new:d94c371, author = {GrujaRS}, title = {{New #VHD (virtual hard disk)#Ransomware extension .vhd!}}, date = {2020-03-22}, url = {https://twitter.com/GrujaRS/status/1241657443282825217}, language = {English}, urldate = {2020-03-27} } New #VHD (virtual hard disk)#Ransomware extension .vhd!
VHD Ransomware
Yara Rules
[TLP:WHITE] win_vhd_ransomware_auto (20220516 | Detects win.vhd_ransomware.)
rule win_vhd_ransomware_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        version = "1"
        description = "Detects win.vhd_ransomware."
        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.vhd_ransomware"
        malpedia_rule_date = "20220513"
        malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26"
        malpedia_version = "20220516"
        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 = { 6a40 8d4d9c 51 52 ffd6 8b0d???????? 6a00 }
            // n = 7, score = 100
            //   6a40                 | push                0x40
            //   8d4d9c               | lea                 ecx, [ebp - 0x64]
            //   51                   | push                ecx
            //   52                   | push                edx
            //   ffd6                 | call                esi
            //   8b0d????????         |                     
            //   6a00                 | push                0

        $sequence_1 = { 83fa03 7c83 c745e400000000 8b7de4 837ddc00 7417 }
            // n = 6, score = 100
            //   83fa03               | cmp                 edx, 3
            //   7c83                 | jl                  0xffffff85
            //   c745e400000000       | mov                 dword ptr [ebp - 0x1c], 0
            //   8b7de4               | mov                 edi, dword ptr [ebp - 0x1c]
            //   837ddc00             | cmp                 dword ptr [ebp - 0x24], 0
            //   7417                 | je                  0x19

        $sequence_2 = { 83c40c e9???????? 8b9514e6ffff 019510e6ffff 81ec24030000 8bd4 33c0 }
            // n = 7, score = 100
            //   83c40c               | add                 esp, 0xc
            //   e9????????           |                     
            //   8b9514e6ffff         | mov                 edx, dword ptr [ebp - 0x19ec]
            //   019510e6ffff         | add                 dword ptr [ebp - 0x19f0], edx
            //   81ec24030000         | sub                 esp, 0x324
            //   8bd4                 | mov                 edx, esp
            //   33c0                 | xor                 eax, eax

        $sequence_3 = { 33ff 57 57 ff15???????? 85c0 0f8469010000 ff15???????? }
            // n = 7, score = 100
            //   33ff                 | xor                 edi, edi
            //   57                   | push                edi
            //   57                   | push                edi
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   0f8469010000         | je                  0x16f
            //   ff15????????         |                     

        $sequence_4 = { 8b4118 899104010000 8b511c 898108010000 89910c010000 bf0d000000 5b }
            // n = 7, score = 100
            //   8b4118               | mov                 eax, dword ptr [ecx + 0x18]
            //   899104010000         | mov                 dword ptr [ecx + 0x104], edx
            //   8b511c               | mov                 edx, dword ptr [ecx + 0x1c]
            //   898108010000         | mov                 dword ptr [ecx + 0x108], eax
            //   89910c010000         | mov                 dword ptr [ecx + 0x10c], edx
            //   bf0d000000           | mov                 edi, 0xd
            //   5b                   | pop                 ebx

        $sequence_5 = { 0f8f63ffffff 6a4f 68???????? 68???????? e8???????? 83c40c }
            // n = 6, score = 100
            //   0f8f63ffffff         | jg                  0xffffff69
            //   6a4f                 | push                0x4f
            //   68????????           |                     
            //   68????????           |                     
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc

        $sequence_6 = { 8d4508 803c103d 0f8459010000 8b4508 83f910 7303 8d4508 }
            // n = 7, score = 100
            //   8d4508               | lea                 eax, [ebp + 8]
            //   803c103d             | cmp                 byte ptr [eax + edx], 0x3d
            //   0f8459010000         | je                  0x15f
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   83f910               | cmp                 ecx, 0x10
            //   7303                 | jae                 5
            //   8d4508               | lea                 eax, [ebp + 8]

        $sequence_7 = { 83c408 3bc6 7438 8bf0 68???????? b910000000 bf???????? }
            // n = 7, score = 100
            //   83c408               | add                 esp, 8
            //   3bc6                 | cmp                 eax, esi
            //   7438                 | je                  0x3a
            //   8bf0                 | mov                 esi, eax
            //   68????????           |                     
            //   b910000000           | mov                 ecx, 0x10
            //   bf????????           |                     

        $sequence_8 = { 89b5e4fbffff 668985e8fbffff e8???????? 83c40c 56 8d95e4fbffff 52 }
            // n = 7, score = 100
            //   89b5e4fbffff         | mov                 dword ptr [ebp - 0x41c], esi
            //   668985e8fbffff       | mov                 word ptr [ebp - 0x418], ax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   56                   | push                esi
            //   8d95e4fbffff         | lea                 edx, [ebp - 0x41c]
            //   52                   | push                edx

        $sequence_9 = { 750b 858e20030000 7403 32c0 c3 8b07 }
            // n = 6, score = 100
            //   750b                 | jne                 0xd
            //   858e20030000         | test                dword ptr [esi + 0x320], ecx
            //   7403                 | je                  5
            //   32c0                 | xor                 al, al
            //   c3                   | ret                 
            //   8b07                 | mov                 eax, dword ptr [edi]

    condition:
        7 of them and filesize < 275456
}
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