SYMBOLCOMMON_NAMEaka. SYNONYMS
win.sienna_purple (Back to overview)

SiennaPurple

aka: HolyLocker, H0lyGh0st

Ransomware used by threat actor group DEV-0530, attributed by MSTIC to North Korean origin.

References
2022-08-04BlackberryBlackBerry Research & Intelligence Team
@online{team:20220804:north:395b87f, author = {BlackBerry Research & Intelligence Team}, title = {{North Korean H0lyGh0st Ransomware Has Ties to Global Geopolitics}}, date = {2022-08-04}, organization = {Blackberry}, url = {https://blogs.blackberry.com/en/2022/08/h0lygh0st-ransomware}, language = {English}, urldate = {2022-08-22} } North Korean H0lyGh0st Ransomware Has Ties to Global Geopolitics
SiennaBlue SiennaPurple
2022-07-14MicrosoftMicrosoft Threat Intelligence Center (MSTIC), Microsoft Digital Security Unit (DSU)
@online{mstic:20220714:north:876e680, author = {Microsoft Threat Intelligence Center (MSTIC) and Microsoft Digital Security Unit (DSU)}, title = {{North Korean threat actor (H0lyGh0st /DEV-0530) targets small and midsize businesses with H0lyGh0st ransomware}}, date = {2022-07-14}, organization = {Microsoft}, url = {https://www.microsoft.com/security/blog/2022/07/14/north-korean-threat-actor-targets-small-and-midsize-businesses-with-h0lygh0st-ransomware/}, language = {English}, urldate = {2022-07-15} } North Korean threat actor (H0lyGh0st /DEV-0530) targets small and midsize businesses with H0lyGh0st ransomware
SiennaBlue SiennaPurple
Yara Rules
[TLP:WHITE] win_sienna_purple_auto (20230125 | Detects win.sienna_purple.)
rule win_sienna_purple_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.sienna_purple."
        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.sienna_purple"
        malpedia_rule_date = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { a1???????? 33c5 8945fc 803d????????00 8bc1 53 56 }
            // n = 7, score = 100
            //   a1????????           |                     
            //   33c5                 | xor                 eax, ebp
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   803d????????00       |                     
            //   8bc1                 | mov                 eax, ecx
            //   53                   | push                ebx
            //   56                   | push                esi

        $sequence_1 = { 8d8de0feffff c645fc01 e8???????? c685d7feffff01 e9???????? 8d4dc8 c645fc02 }
            // n = 7, score = 100
            //   8d8de0feffff         | lea                 ecx, [ebp - 0x120]
            //   c645fc01             | mov                 byte ptr [ebp - 4], 1
            //   e8????????           |                     
            //   c685d7feffff01       | mov                 byte ptr [ebp - 0x129], 1
            //   e9????????           |                     
            //   8d4dc8               | lea                 ecx, [ebp - 0x38]
            //   c645fc02             | mov                 byte ptr [ebp - 4], 2

        $sequence_2 = { e9???????? 8d8df8fdffff e9???????? 8d8d54ffffff e9???????? 8d8de0feffff e9???????? }
            // n = 7, score = 100
            //   e9????????           |                     
            //   8d8df8fdffff         | lea                 ecx, [ebp - 0x208]
            //   e9????????           |                     
            //   8d8d54ffffff         | lea                 ecx, [ebp - 0xac]
            //   e9????????           |                     
            //   8d8de0feffff         | lea                 ecx, [ebp - 0x120]
            //   e9????????           |                     

        $sequence_3 = { b001 5e 5d c3 3d17040000 7557 833d????????00 }
            // n = 7, score = 100
            //   b001                 | mov                 al, 1
            //   5e                   | pop                 esi
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   3d17040000           | cmp                 eax, 0x417
            //   7557                 | jne                 0x59
            //   833d????????00       |                     

        $sequence_4 = { e8???????? 83c404 894640 85c0 7514 8b4d08 68???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   894640               | mov                 dword ptr [esi + 0x40], eax
            //   85c0                 | test                eax, eax
            //   7514                 | jne                 0x16
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   68????????           |                     

        $sequence_5 = { c745fc00000000 e8???????? 8b8dd4feffff 8d85d8feffff 56 50 6a16 }
            // n = 7, score = 100
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   e8????????           |                     
            //   8b8dd4feffff         | mov                 ecx, dword ptr [ebp - 0x12c]
            //   8d85d8feffff         | lea                 eax, [ebp - 0x128]
            //   56                   | push                esi
            //   50                   | push                eax
            //   6a16                 | push                0x16

        $sequence_6 = { c1e008 c78524ffffff00000000 8a0f 888d22ffffff 0fb6c9 0bc1 8b8d14ffffff }
            // n = 7, score = 100
            //   c1e008               | shl                 eax, 8
            //   c78524ffffff00000000     | mov    dword ptr [ebp - 0xdc], 0
            //   8a0f                 | mov                 cl, byte ptr [edi]
            //   888d22ffffff         | mov                 byte ptr [ebp - 0xde], cl
            //   0fb6c9               | movzx               ecx, cl
            //   0bc1                 | or                  eax, ecx
            //   8b8d14ffffff         | mov                 ecx, dword ptr [ebp - 0xec]

        $sequence_7 = { c645fc07 e8???????? 8d8dd8feffff c645fc06 e8???????? 8d8dc4feffff c645fc00 }
            // n = 7, score = 100
            //   c645fc07             | mov                 byte ptr [ebp - 4], 7
            //   e8????????           |                     
            //   8d8dd8feffff         | lea                 ecx, [ebp - 0x128]
            //   c645fc06             | mov                 byte ptr [ebp - 4], 6
            //   e8????????           |                     
            //   8d8dc4feffff         | lea                 ecx, [ebp - 0x13c]
            //   c645fc00             | mov                 byte ptr [ebp - 4], 0

        $sequence_8 = { e8???????? 6a74 8d85c0feffff 6a00 50 e8???????? 83c40c }
            // n = 7, score = 100
            //   e8????????           |                     
            //   6a74                 | push                0x74
            //   8d85c0feffff         | lea                 eax, [ebp - 0x140]
            //   6a00                 | push                0
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc

        $sequence_9 = { 85d2 75ef 8b4914 85c9 7414 81c198000000 e8???????? }
            // n = 7, score = 100
            //   85d2                 | test                edx, edx
            //   75ef                 | jne                 0xfffffff1
            //   8b4914               | mov                 ecx, dword ptr [ecx + 0x14]
            //   85c9                 | test                ecx, ecx
            //   7414                 | je                  0x16
            //   81c198000000         | add                 ecx, 0x98
            //   e8????????           |                     

    condition:
        7 of them and filesize < 2930688
}
Download all Yara Rules