6d3121d675731a90986a4f9cd15e216e8bfbe9f45a1955a1fb5c017a6e5867c6

General

Target
2026-08-18_54c73320d5f6634b7589f718b6c5a4f9_elex_feodo_wannacry.exe
Size 96KB
Sample260818-p9wpwssgpg
SHA256 6d3121d675731a90986a4f9cd15e216e8bfbe9f45a1955a1fb5c017a6e5867c6
MD5 54c73320d5f6634b7589f718b6c5a4f9
SHA1 d900c4b9d37739b242ea8ef4331a2dbb649971e7
SHA512 229811e75fbc64ea4d7e0ff7c86a1e80631700f8b6f999d091db84d14669795e301f0c3c3d3083fe73079683531799744d32d3cb06fc82ff795599b4aff795d5
SSDEEP 1536:VSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlp:QSABNx6vb4RoI4pyjHYLhal01UoPXF
TLSH
T1CBA3AE0BAFAA08D9E220AD71152D377597EF846E3B149B978349FE4D9433CC0EC3614A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
3592	teqeszc.exe

Executes dropped EXE 1 IoCs

pid	Process
3592	teqeszc.exe

Loads dropped DLL 1 IoCs

pid	Process
4188	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
4828	cmd.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2864	4188	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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-18_54c73320d5f6634b7589f718b6c5a4f9_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	teqeszc.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
4828	cmd.exe
4064	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4064	PING.EXE

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4312	2026-08-18_54c73320d5f6634b7589f718b6c5a4f9_elex_feodo_wannacry.exe
3592	teqeszc.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4312 wrote to memory of 4828	4312	2026-08-18_54c73320d5f6634b7589f718b6c5a4f9_elex_feodo_wannacry.exe	89
PID 4828 wrote to memory of 4064	4828	cmd.exe	91
PID 4828 wrote to memory of 3592	4828	cmd.exe	92
PID 3592 wrote to memory of 4188	3592	teqeszc.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-18_54c73320d5f6634b7589f718b6c5a4f9_elex_feodo_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-18_54c73320d5f6634b7589f718b6c5a4f9_elex_feodo_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4312
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\teqeszc.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-18_54c73320d5f6634b7589f718b6c5a4f9_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:4828
- - 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:4064
- - \??\c:\teqeszc.exe
    c:\teqeszc.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-18_54c73320d5f6634b7589f718b6c5a4f9_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:3592
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\rnxyebeob\pkbwk.dll",DoVirusScan c:\teqeszc.exe
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      PID:4188
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4188 -s 476
        5⤵
        Program crash
        
        PID:2864

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4188 -ip 4188
1⤵
PID:2436

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

pkbwk.dll

Path \??\c:\rnxyebeob\pkbwk.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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teqeszc.exe

Path \??\c:\teqeszc.exe
Size 96KB
SHA256 0d5f019d39f17cccb5113ee20058796ebee0e62eff3a6a1815514cbf25028bea
MD5 d6a6b8b786ef5407d848adf08e699e4c
SHA1 c34c368132a0858dce5d65564f2c3d944b3ca177
SHA512 fd263cbe4a46609a183322dca6b7d4d45577a88fa03e8c77067c04d8acdd16a84faa2413185f515ec47eb885095005504cd9c4aac65a10d0fd822df2ba3e8f3c
SSDEEP 1536:VSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlb:QSABNx6vb4RoI4pyjHYLhal01UoPXn
TLSH
T171A3AE0BAFAA48D9E120AD70152D377597EF846E3B1897978348FE4D9433CD0EC3614A
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3592-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4188-9-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/4312-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4312-2-0x0000000000400000-0x0000000000417000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads