SYMBOLCOMMON_NAMEaka. SYNONYMS
win.vhd_ransomware (Back to overview)

VHD Ransomware


There is no description at this point.

References
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 (20211008 | Detects win.vhd_ransomware.)
rule win_vhd_ransomware_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-10-07"
        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 = "20211007"
        malpedia_hash = "e5b790e0f888f252d49063a1251ca60ec2832535"
        malpedia_version = "20211008"
        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 = { 7e26 8dbdd0fcffff 2bfa 8d4204 }
            // n = 4, score = 100
            //   7e26                 | jle                 0x28
            //   8dbdd0fcffff         | lea                 edi, dword ptr [ebp - 0x330]
            //   2bfa                 | sub                 edi, edx
            //   8d4204               | lea                 eax, dword ptr [edx + 4]

        $sequence_1 = { 83ec10 53 33c0 57 8d9b00000000 0fb65c8602 0fb64c8603 }
            // n = 7, score = 100
            //   83ec10               | sub                 esp, 0x10
            //   53                   | push                ebx
            //   33c0                 | xor                 eax, eax
            //   57                   | push                edi
            //   8d9b00000000         | lea                 ebx, dword ptr [ebx]
            //   0fb65c8602           | movzx               ebx, byte ptr [esi + eax*4 + 2]
            //   0fb64c8603           | movzx               ecx, byte ptr [esi + eax*4 + 3]

        $sequence_2 = { 83bde4fbffff40 0f8678000000 8d8de8fbffff 68???????? 51 e8???????? }
            // n = 6, score = 100
            //   83bde4fbffff40       | cmp                 dword ptr [ebp - 0x41c], 0x40
            //   0f8678000000         | jbe                 0x7e
            //   8d8de8fbffff         | lea                 ecx, dword ptr [ebp - 0x418]
            //   68????????           |                     
            //   51                   | push                ecx
            //   e8????????           |                     

        $sequence_3 = { e8???????? 8be5 5d c3 8b4508 8b4d0c 8b1d???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   8b1d????????         |                     

        $sequence_4 = { 8bf0 b9c9000000 f3a5 8bb5ccfcffff 33c0 c70300000000 b9c8000000 }
            // n = 7, score = 100
            //   8bf0                 | mov                 esi, eax
            //   b9c9000000           | mov                 ecx, 0xc9
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   8bb5ccfcffff         | mov                 esi, dword ptr [ebp - 0x334]
            //   33c0                 | xor                 eax, eax
            //   c70300000000         | mov                 dword ptr [ebx], 0
            //   b9c8000000           | mov                 ecx, 0xc8

        $sequence_5 = { 8dbdd4fcffff f3ab 8b4d0c c785d0fcffff01000000 }
            // n = 4, score = 100
            //   8dbdd4fcffff         | lea                 edi, dword ptr [ebp - 0x32c]
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   c785d0fcffff01000000     | mov    dword ptr [ebp - 0x330], 1

        $sequence_6 = { 33d3 c1e210 0bd1 891486 }
            // n = 4, score = 100
            //   33d3                 | xor                 edx, ebx
            //   c1e210               | shl                 edx, 0x10
            //   0bd1                 | or                  edx, ecx
            //   891486               | mov                 dword ptr [esi + eax*4], edx

        $sequence_7 = { b9c8000000 8bfa f3ab 8b450c 899598f9ffff c70601000000 }
            // n = 6, score = 100
            //   b9c8000000           | mov                 ecx, 0xc8
            //   8bfa                 | mov                 edi, edx
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   899598f9ffff         | mov                 dword ptr [ebp - 0x668], edx
            //   c70601000000         | mov                 dword ptr [esi], 1

        $sequence_8 = { 7425 6a00 8d8588b4ffff 50 6800200000 }
            // n = 5, score = 100
            //   7425                 | je                  0x27
            //   6a00                 | push                0
            //   8d8588b4ffff         | lea                 eax, dword ptr [ebp - 0x4b78]
            //   50                   | push                eax
            //   6800200000           | push                0x2000

        $sequence_9 = { 53 e8???????? 8b85a0f9ffff 50 e8???????? 8b8d9cf9ffff }
            // n = 6, score = 100
            //   53                   | push                ebx
            //   e8????????           |                     
            //   8b85a0f9ffff         | mov                 eax, dword ptr [ebp - 0x660]
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b8d9cf9ffff         | mov                 ecx, dword ptr [ebp - 0x664]

    condition:
        7 of them and filesize < 275456
}
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