16f1b5a1cea3c78a759ffe1b9de9f065dabb8ec219f875e6bde605aa5700cd3a

General

Target
2026-08-23_bc1923d11817683dbed951a8d5bf8db7_elex_feodo_wannacry.exe
Size 96KB
Sample260823-27n89abl41
SHA256 16f1b5a1cea3c78a759ffe1b9de9f065dabb8ec219f875e6bde605aa5700cd3a
MD5 bc1923d11817683dbed951a8d5bf8db7
SHA1 3eb9856aa0336a25f1d2c00a003a662bf990c9f1
SHA512 3293d4864d56d56bb65ed1da4ea04ef9640adcd196e06ca8ec1f8d4b2be6fdbdf04695fd95e4a251063cb8b9d746776c7d8277efb4b837e64460dedf9cdb8a7a
SSDEEP 1536:VSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzl5:QSABNx6vb4RoI4pyjHYLhal01UoPXt
TLSH
T19AA3AD0BABAA48D9E220AD70152E377597FF946E3B149B939344FD4D9433CC1EC3614A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
1600	yfqgofax.exe

Executes dropped EXE 1 IoCs

pid	Process
1600	yfqgofax.exe

Loads dropped DLL 1 IoCs

pid	Process
6068	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
2692	cmd.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
5424	6068	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	2026-08-23_bc1923d11817683dbed951a8d5bf8db7_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	yfqgofax.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
4228	PING.EXE
2692	cmd.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4228	PING.EXE

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1004	2026-08-23_bc1923d11817683dbed951a8d5bf8db7_elex_feodo_wannacry.exe
1600	yfqgofax.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1004 wrote to memory of 2692	1004	2026-08-23_bc1923d11817683dbed951a8d5bf8db7_elex_feodo_wannacry.exe	89
PID 2692 wrote to memory of 4228	2692	cmd.exe	91
PID 2692 wrote to memory of 1600	2692	cmd.exe	92
PID 1600 wrote to memory of 6068	1600	yfqgofax.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-23_bc1923d11817683dbed951a8d5bf8db7_elex_feodo_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-23_bc1923d11817683dbed951a8d5bf8db7_elex_feodo_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1004
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\yfqgofax.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-23_bc1923d11817683dbed951a8d5bf8db7_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:2692
- - 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:4228
- - \??\c:\yfqgofax.exe
    c:\yfqgofax.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-23_bc1923d11817683dbed951a8d5bf8db7_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:1600
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\gmbtz\fiumdixhu.dll",DoVirusScan c:\yfqgofax.exe
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      PID:6068
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 6068 -s 476
        5⤵
        Program crash
        
        PID:5424

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 396 -p 6068 -ip 6068
1⤵
PID:5552

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

fiumdixhu.dll

Path \??\c:\gmbtz\fiumdixhu.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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yfqgofax.exe

Path \??\c:\yfqgofax.exe
Size 96KB
SHA256 e952c6d4f120b146afb5fe0aedd793526bd82f3f8fd131215f6958235907b3b0
MD5 ee88cae67fc6c7d2d23d4cae046b50ed
SHA1 90fdec3c82ed5027a943ead5fb90a31e259c65b9
SHA512 49d0463630b1f4066549a201dcda60beec4f691bcdb11273f7a58f3f63a512c0d978e7426d8b4850d4a41f867f4fbdc950271be48a76ec7e47733f87f971f038
SSDEEP 1536:VSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlS:QSABNx6vb4RoI4pyjHYLhal01UoPXO
TLSH
T1EDA3AD0BAFAA48D9E220AD70152E377597EF946E3B1497939348FE4D9433CC1EC3614A
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1004-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/1004-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/1600-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/6068-9-0x0000000010000000-0x0000000010032000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads