Essential information

Value / Name

636e35705ca1637fa3419e7728592b581be4e5dc

Confidence

100/100

Revoked

Yes

Valid from

20/05/2022 10:48

Valid until

23/08/2023 10:48

Pattern type

yara

Published

20/12/2025 19:32

Modified

20/12/2025 19:47

Author / Source

AlienVault

Description

Pattern

rule apt_CN_TwistedPanda_SPINNER_2 {   
      meta:   
         author = "Check Point Research"   
         description = "Detect an older variant of SPINNER payload used by TwistedPanda"   
         date = "2022-04-14"   
         hash = "28ecd1127bac08759d018787484b1bd16213809a2cc414514dc1ea87eb4c5ab8"   
            
      strings:   
         // C7 ?? ?? ?? 00 00 00                                mov     dword ptr [eax+??], ??   
         // C7 ?? ?? ?? 00 00 00                                mov     dword ptr [eax+??], ??   
         // C6                                                  mov     byte ptr [eax], 0   
         $config_init = { C7 [3] 00 00 00 C7 [3] 00 00 00 C6 }   
      
         $c2_cmd_1 = { 01 00 03 10 }   
         $c2_cmd_2 = { 02 00 01 10 }   
         $c2_cmd_3 = { 01 00 01 10 }   
         $c2_cmd_4 = { 01 00 00 10 }   
         $c2_cmd_5 = { 02 00 00 10 }   
      
         // 80 B3 ?? ?? ?? ?? ??                    xor     ds:dd_encrypted_url[ebx], 50h   
         // 8D BB ?? ?? ?? ??                       lea     edi, dd_encrypted_url[ebx]   
         // 8B 56 14                                mov     edx, [esi+14h]   
         // 8B C2                                   mov     eax, edx   
         // 8B 4E 10                                mov     ecx, [esi+10h]   
         // 2B C1                                   sub     eax, ecx   
         // 83 F8 01                                cmp     eax, 1   
         $decryption = { 80 B3 [5] 8D BB [4] 8B 56 14 8B C2 8B 4E 10 2B C1 83 F8 01 }   
       
      condition:   
         // MZ signature at offset 0 and ...   
         uint16(0) == 0x5A4D and   
              
         // ... PE signature at offset stored in MZ header at 0x3C   
         uint32(uint32(0x3C)) == 0x00004550 and    
         filesize < 3000KB  and #config_init > 10 and 2 of ($c2_cmd_*) and $decryption   
   }

Labels / Tags

Labels: hodur plugx spinner twisted panda

Marking (TLP)

TLP:CLEAR