84da04b76221fbe50a16262247ac60f628a8f62771235d1f829c6226d0ac604d

General

Target
2026-08-17_246d02960a144f7c2a11bcc839034f69_elex_feodo_wannacry.exe
Size 94KB
Sample260817-cwccwadn6w
SHA256 84da04b76221fbe50a16262247ac60f628a8f62771235d1f829c6226d0ac604d
MD5 246d02960a144f7c2a11bcc839034f69
SHA1 b730c192ed0c1201499faff17cdb6d44f903b299
SHA512 623cb5bdb193961ae2fe6c1668c09b7d69864d5cd77af53244b5ce9490d8e1c51ebfded1a4bdaee7a4dc1211cc78f209a374c3d2834f17a6df37677c7c7abbf8
SSDEEP 1536:VSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlo:QSABNx6vb4RoI4pyjHYLhal01UoPXE
TLSH
T1E793AD0BABAA08D9E220AD30152E377597FF946E3B149B978348FD4D9433CC1EC3614A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
5100	dvfmk.exe

Executes dropped EXE 1 IoCs

pid	Process
5100	dvfmk.exe

Loads dropped DLL 1 IoCs

pid	Process
1084	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
3448	cmd.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2868	1084	WerFault.exe	93

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	2026-08-17_246d02960a144f7c2a11bcc839034f69_elex_feodo_wannacry.exe
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	dvfmk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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
3448	cmd.exe
3420	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3420	PING.EXE

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2164	2026-08-17_246d02960a144f7c2a11bcc839034f69_elex_feodo_wannacry.exe
5100	dvfmk.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2164 wrote to memory of 3448	2164	2026-08-17_246d02960a144f7c2a11bcc839034f69_elex_feodo_wannacry.exe	89
PID 3448 wrote to memory of 3420	3448	cmd.exe	91
PID 3448 wrote to memory of 5100	3448	cmd.exe	92
PID 5100 wrote to memory of 1084	5100	dvfmk.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-17_246d02960a144f7c2a11bcc839034f69_elex_feodo_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-17_246d02960a144f7c2a11bcc839034f69_elex_feodo_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2164
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\dvfmk.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-17_246d02960a144f7c2a11bcc839034f69_elex_feodo_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:3448
- - 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:3420
- - \??\c:\dvfmk.exe
    c:\dvfmk.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-17_246d02960a144f7c2a11bcc839034f69_elex_feodo_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:5100
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\dfzvazyzk\vnfbf.dll",DoVirusScan c:\dvfmk.exe
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      PID:1084
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1084 -s 476
        5⤵
        Program crash
        
        PID:2868

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1084 -ip 1084
1⤵
PID:3184

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

vnfbf.dll

Path \??\c:\dfzvazyzk\vnfbf.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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dvfmk.exe

Path \??\c:\dvfmk.exe
Size 95KB
SHA256 8ff1b23f515dd1a1480244473e21989c0da6212137a4acbb30bd57b379867d43
MD5 90a153274b737ee7e27c859eb16383fd
SHA1 b147580839f42337c5d15cbefb10fb77ea7aa219
SHA512 d83a9cf2072c8bcc71ae223a401d08f27fc79fb42fd1c4a3207686aa0b17b8f6cdfffe4b5b9f654ccf17537cdd2da725681345ca171cac3a2b04f0ce6ee372ec
SSDEEP 1536:VSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlp:QSABNx6vb4RoI4pyjHYLhal01UoPXN
TLSH
T19A93AD0BABAA08D9E220AD70152D377597FF946E3B189B979348FD4D9433CC1EC3614A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1084-9-0x0000000010000000-0x0000000010032000-memory.dmp

Download

memory/2164-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/2164-2-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/5100-6-0x0000000000400000-0x0000000000417000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads