b2c8990ab4508a65281093ec815f99d3a5ff4ab127a43782e8f0f5dc737ae300

General

Target
2026-08-24_68df0d1bc60d421a351dcf4b2b1a2838_elex_feodo_wannacry.exe
Size 94KB
Sample260825-nd8txa1crc
SHA256 b2c8990ab4508a65281093ec815f99d3a5ff4ab127a43782e8f0f5dc737ae300
MD5 68df0d1bc60d421a351dcf4b2b1a2838
SHA1 6ac65d68e0ec394384d743f677f27400951a544a
SHA512 28a3b2b47834672799f613867f1cffca72471fde94ba211dddbe5f0f8c8068cb2b124a78e6a0cd7e30b4afc32313842c669aa7cb1f07eb69a4bdacf3fbb8d93f
SSDEEP 1536:VSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlf:QSABNx6vb4RoI4pyjHYLhal01UoPX
TLSH
T1BC93AD0BAFAA18D9E220AD71152D377597EF846E3B149B978349FD4D9433CC0EC3614A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
5080	isjimu.exe

Executes dropped EXE 1 IoCs

pid	Process
5080	isjimu.exe

Loads dropped DLL 1 IoCs

pid	Process
2672	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
3876	cmd.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4560	2672	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	isjimu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-24_68df0d1bc60d421a351dcf4b2b1a2838_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

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
3876	cmd.exe
3260	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3260	PING.EXE

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4364	2026-08-24_68df0d1bc60d421a351dcf4b2b1a2838_elex_feodo_wannacry.exe
5080	isjimu.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4364 wrote to memory of 3876	4364	2026-08-24_68df0d1bc60d421a351dcf4b2b1a2838_elex_feodo_wannacry.exe	89
PID 3876 wrote to memory of 3260	3876	cmd.exe	91
PID 3876 wrote to memory of 5080	3876	cmd.exe	92
PID 5080 wrote to memory of 2672	5080	isjimu.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-24_68df0d1bc60d421a351dcf4b2b1a2838_elex_feodo_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-24_68df0d1bc60d421a351dcf4b2b1a2838_elex_feodo_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4364
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\isjimu.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-24_68df0d1bc60d421a351dcf4b2b1a2838_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:3876
- - 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:3260
- - \??\c:\isjimu.exe
    c:\isjimu.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-24_68df0d1bc60d421a351dcf4b2b1a2838_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:5080
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\tiwgx\nfgheb.dll",DoVirusScan c:\isjimu.exe
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      PID:2672
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2672 -s 476
        5⤵
        Program crash
        
        PID:4560

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 2672 -ip 2672
1⤵
PID:3332

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

isjimu.exe

Path \??\c:\isjimu.exe
Size 95KB
SHA256 9fbefbc9b3217d4e180eec161af278f73ae5edfa94579f981c02494ecd005bf4
MD5 044806f9f6b18d3e81b9dae40f74055a
SHA1 7dc32e6c8e494702eb1b1b6c3a24175f78078616
SHA512 ac44d4c18310369a029748c0ede98a3a93421706c91244b24750ea509c3239bbfbc9811b3a9fe87c0640a4d9e34e866b5fe740eadda9f409c167dc66e09dd52f
SSDEEP 1536:VSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzls:QSABNx6vb4RoI4pyjHYLhal01UoPXg
TLSH
T1C793AE0BAFAA08D9E220AD71156D377597EF846E3B1897978349FE4D9433CC0EC3614A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

nfgheb.dll

Path \??\c:\tiwgx\nfgheb.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

Submit Download

memory/2672-9-0x0000000010000000-0x0000000010032000-memory.dmp

Download

memory/4364-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4364-2-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/5080-6-0x0000000000400000-0x0000000000417000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads