9fe4b3d682a53373394ec8cf14197db0e26cfbbdb6cf41de3cde3c3157826c34

General

Target
2026-08-13_e84e6055904151f7ca055d98db264d54_elex_wannacry.exe
Size 87KB
Sample260813-jraf2svclb
SHA256 9fe4b3d682a53373394ec8cf14197db0e26cfbbdb6cf41de3cde3c3157826c34
MD5 e84e6055904151f7ca055d98db264d54
SHA1 d1ab7413deffae72cc0ca9005a935f85b5b481a0
SHA512 1c16c315177a9252543ce3523ddbb90e99be438e9165d19b94da426bc59ce0d6dad69302da042b78ad56e1b2739e812faaa5928dfd5f391f82bd21e79008fe5e
SSDEEP 1536:TSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzl+:eSABNx6vb4RoI4pyjHYLhal01UoPXS
TLSH
T145939C0BABAA58E9E1206C70152D377597EF94AB3B2597A38344FE4D9133CC1EC3614E
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
3840	blvvyf.exe

Executes dropped EXE 1 IoCs

pid	Process
3840	blvvyf.exe

Loads dropped DLL 1 IoCs

pid	Process
4460	rundll32.exe

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
788	cmd.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2940	4460	WerFault.exe	90

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	blvvyf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-13_e84e6055904151f7ca055d98db264d54_elex_wannacry.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
788	cmd.exe
1048	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1048	PING.EXE

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4772	2026-08-13_e84e6055904151f7ca055d98db264d54_elex_wannacry.exe
3840	blvvyf.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4772 wrote to memory of 788	4772	2026-08-13_e84e6055904151f7ca055d98db264d54_elex_wannacry.exe	86
PID 788 wrote to memory of 1048	788	cmd.exe	88
PID 788 wrote to memory of 3840	788	cmd.exe	89
PID 3840 wrote to memory of 4460	3840	blvvyf.exe	90

C:\Users\Admin\AppData\Local\Temp\2026-08-13_e84e6055904151f7ca055d98db264d54_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-13_e84e6055904151f7ca055d98db264d54_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4772
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\blvvyf.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-13_e84e6055904151f7ca055d98db264d54_elex_wannacry.exe"
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:788
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1048
- - \??\c:\blvvyf.exe
    c:\blvvyf.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-13_e84e6055904151f7ca055d98db264d54_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3840
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\wehnr\ydoyaep.dll",DoVirusScan c:\blvvyf.exe
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      PID:4460
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4460 -s 560
        5⤵
        Program crash
        
        PID:2940

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4460 -ip 4460
1⤵
PID:4872

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Remote System Discovery

1

T1018

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

blvvyf.exe

Path C:\blvvyf.exe
Size 87KB
SHA256 3e11509d3fe99b152d2e033f21216a7fa82d7728eef4ba95ea162f45c934be4f
MD5 f29cae2d420973493832fde40898c3de
SHA1 28177d9453ab8d17b5c15e31fe4145cb7d9f516a
SHA512 f8232cf1fe6d23aed41dc55b398c915d394900da2f58b50ad8163a147940cfaea381356b0ed9ffdd3f332ed33df50b7440d0c707a4e1b03b2f7dfde4f9f4c89c
SSDEEP 1536:TSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlt:eSABNx6vb4RoI4pyjHYLhal01UoPXx
TLSH
T140939D0BABA958E9E1206C70052D377597EF94AB3B2597A38384FE4D9133DC1EC3614E
MD5 SHA1 SHA512 SSDEEP TLSH

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ydoyaep.dll

Path \??\c:\wehnr\ydoyaep.dll
Size 50KB
SHA256 7604a0d3e695ff2f47b2961a860aa77e41952df48c132c18ac8d84e6ed3ee8eb
MD5 18cc91cc0c4c41e39a2c5310e760f0ef
SHA1 aaacc94db8d8a37e5d34878aa259d3274a5ff2a7
SHA512 8abba5220a7216288d0d2c683a5d01b796b1179464a2432eda991004348223c822c54ab39fd19302ff01974ec8d026e98280e9f1bdb67178126d75a974ecc7e7
SSDEEP 768:Z+arYIR3u5v4bGwCl56LNQQe5JBtGf1oTYtx/qQvo9:ZPrG57TzDxJS6Etx/ZvO
TLSH
T1AB33E178E1F4B8F6E46EAB345D82146DB1C16BD34D3080BA079224AF6C37E578B52731
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3840-7-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4460-10-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/4772-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4772-2-0x0000000000400000-0x0000000000417000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads