SYMBOLCOMMON_NAMEaka. SYNONYMS
win.lolsnif (Back to overview)

LOLSnif


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References
2020-08-28CheckpointCheck Point Research
@online{research:20200828:gozi:944c005, author = {Check Point Research}, title = {{Gozi: The Malware with a Thousand Faces}}, date = {2020-08-28}, organization = {Checkpoint}, url = {https://research.checkpoint.com/2020/gozi-the-malware-with-a-thousand-faces/}, language = {English}, urldate = {2020-09-01} } Gozi: The Malware with a Thousand Faces
DreamBot ISFB LOLSnif SaiGon
2020-07-28Medium (@vishal_thakur)Vishal Thakur
@online{thakur:20200728:lolsnif:33c59cf, author = {Vishal Thakur}, title = {{LOLSnif Malware}}, date = {2020-07-28}, organization = {Medium (@vishal_thakur)}, url = {https://medium.com/@vishal_thakur/lolsnif-malware-e6cb2e731e63}, language = {English}, urldate = {2020-08-05} } LOLSnif Malware
LOLSnif
2020-05-14TelekomThomas Barabosch
@online{barabosch:20200514:lolsnif:c7a2736, author = {Thomas Barabosch}, title = {{LOLSnif – Tracking Another Ursnif-Based Targeted Campaign}}, date = {2020-05-14}, organization = {Telekom}, url = {https://www.telekom.com/en/blog/group/article/lolsnif-tracking-another-ursnif-based-targeted-campaign-600062}, language = {English}, urldate = {2020-05-14} } LOLSnif – Tracking Another Ursnif-Based Targeted Campaign
LOLSnif
2020-04-24The DFIR ReportThe DFIR Report
@online{report:20200424:ursnif:e983798, author = {The DFIR Report}, title = {{Ursnif via LOLbins}}, date = {2020-04-24}, organization = {The DFIR Report}, url = {https://thedfirreport.com/2020/04/24/ursnif-via-lolbins/}, language = {English}, urldate = {2020-05-15} } Ursnif via LOLbins
Cobalt Strike LOLSnif
Yara Rules
[TLP:WHITE] win_lolsnif_auto (20201014 | autogenerated rule brought to you by yara-signator)
rule win_lolsnif_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.lolsnif"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { 0f8483000000 ff7524 8d45c8 ff7520 56 ff7514 ff7510 }
            // n = 7, score = 100
            //   0f8483000000         | je                  0x89
            //   ff7524               | push                dword ptr [ebp + 0x24]
            //   8d45c8               | lea                 eax, [ebp - 0x38]
            //   ff7520               | push                dword ptr [ebp + 0x20]
            //   56                   | push                esi
            //   ff7514               | push                dword ptr [ebp + 0x14]
            //   ff7510               | push                dword ptr [ebp + 0x10]

        $sequence_1 = { 0fb6c9 33d1 83e20f c1e804 330495807f7000 c1e904 8bd0 }
            // n = 7, score = 100
            //   0fb6c9               | movzx               ecx, cl
            //   33d1                 | xor                 edx, ecx
            //   83e20f               | and                 edx, 0xf
            //   c1e804               | shr                 eax, 4
            //   330495807f7000       | xor                 eax, dword ptr [edx*4 + 0x707f80]
            //   c1e904               | shr                 ecx, 4
            //   8bd0                 | mov                 edx, eax

        $sequence_2 = { 6683244600 8d45f8 50 ff750c ff7508 53 }
            // n = 6, score = 100
            //   6683244600           | and                 word ptr [esi + eax*2], 0
            //   8d45f8               | lea                 eax, [ebp - 8]
            //   50                   | push                eax
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   53                   | push                ebx

        $sequence_3 = { 0f84f9000000 ff7514 33c0 56 884c1eff e8???????? 50 }
            // n = 7, score = 100
            //   0f84f9000000         | je                  0xff
            //   ff7514               | push                dword ptr [ebp + 0x14]
            //   33c0                 | xor                 eax, eax
            //   56                   | push                esi
            //   884c1eff             | mov                 byte ptr [esi + ebx - 1], cl
            //   e8????????           |                     
            //   50                   | push                eax

        $sequence_4 = { 35b1390d66 50 8bd3 e8???????? eb02 33c0 85c0 }
            // n = 7, score = 100
            //   35b1390d66           | xor                 eax, 0x660d39b1
            //   50                   | push                eax
            //   8bd3                 | mov                 edx, ebx
            //   e8????????           |                     
            //   eb02                 | jmp                 4
            //   33c0                 | xor                 eax, eax
            //   85c0                 | test                eax, eax

        $sequence_5 = { ff15???????? eb0c 50 ff15???????? eb03 6a08 }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   eb0c                 | jmp                 0xe
            //   50                   | push                eax
            //   ff15????????         |                     
            //   eb03                 | jmp                 5
            //   6a08                 | push                8

        $sequence_6 = { 8bf0 85f6 7c72 837d1000 740e 8b45fc 8b08 }
            // n = 7, score = 100
            //   8bf0                 | mov                 esi, eax
            //   85f6                 | test                esi, esi
            //   7c72                 | jl                  0x74
            //   837d1000             | cmp                 dword ptr [ebp + 0x10], 0
            //   740e                 | je                  0x10
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8b08                 | mov                 ecx, dword ptr [eax]

        $sequence_7 = { c20400 83ec18 8364240c00 53 55 bd04010000 6850020000 }
            // n = 7, score = 100
            //   c20400               | ret                 4
            //   83ec18               | sub                 esp, 0x18
            //   8364240c00           | and                 dword ptr [esp + 0xc], 0
            //   53                   | push                ebx
            //   55                   | push                ebp
            //   bd04010000           | mov                 ebp, 0x104
            //   6850020000           | push                0x250

        $sequence_8 = { 8d4c2410 e8???????? 85c0 0f8489000000 e8???????? 85c0 7431 }
            // n = 7, score = 100
            //   8d4c2410             | lea                 ecx, [esp + 0x10]
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   0f8489000000         | je                  0x8f
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7431                 | je                  0x33

        $sequence_9 = { 66ff01 83f803 7212 0fb70c4502777000 8d8c4e92810000 66ff01 83665000 }
            // n = 7, score = 100
            //   66ff01               | inc                 word ptr [ecx]
            //   83f803               | cmp                 eax, 3
            //   7212                 | jb                  0x14
            //   0fb70c4502777000     | movzx               ecx, word ptr [eax*2 + 0x707702]
            //   8d8c4e92810000       | lea                 ecx, [esi + ecx*2 + 0x8192]
            //   66ff01               | inc                 word ptr [ecx]
            //   83665000             | and                 dword ptr [esi + 0x50], 0

    condition:
        7 of them and filesize < 425984
}
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