d62741712e9d6a1b25494a1a28417b0ffe544ef543aceddb5db513a051383688

General

Target
2026-08-27_f8a03a0541550faf12ddfc8f8acbc1c8_elex_wannacry.exe
Size 86KB
Sample260828-bb4e7aek7z
SHA256 d62741712e9d6a1b25494a1a28417b0ffe544ef543aceddb5db513a051383688
MD5 f8a03a0541550faf12ddfc8f8acbc1c8
SHA1 c4da4d6912cb42dea0640a975b0a386d2bf54e4d
SHA512 20f44bc37b8d1dd9b94332bb3e534e2841f81ed5ace39e02d12e14a8f5a0beb1b2014b08fe8d637d42d36d7db9fa5c259bdb654e37a8ed1ffc3a8c5047c07fc8
SSDEEP 1536:TSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlk:eSABNx6vb4RoI4pyjHYLhal01UoPXw
TLSH
T13E839D07ABAA58E9E1206C70162D773493EF986F3B2597A38344FE4D9133DC1EC3614A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
4920	cjwks.exe

Executes dropped EXE 1 IoCs

pid	Process
4920	cjwks.exe

Loads dropped DLL 1 IoCs

pid	Process
5484	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
4100	cmd.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3820	5484	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cjwks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-27_f8a03a0541550faf12ddfc8f8acbc1c8_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
4100	cmd.exe
1872	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1872	PING.EXE

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4120	2026-08-27_f8a03a0541550faf12ddfc8f8acbc1c8_elex_wannacry.exe
4920	cjwks.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4120 wrote to memory of 4100	4120	2026-08-27_f8a03a0541550faf12ddfc8f8acbc1c8_elex_wannacry.exe	89
PID 4100 wrote to memory of 1872	4100	cmd.exe	91
PID 4100 wrote to memory of 4920	4100	cmd.exe	92
PID 4920 wrote to memory of 5484	4920	cjwks.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-27_f8a03a0541550faf12ddfc8f8acbc1c8_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-27_f8a03a0541550faf12ddfc8f8acbc1c8_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4120
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\cjwks.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-27_f8a03a0541550faf12ddfc8f8acbc1c8_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:4100
- - 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:1872
- - \??\c:\cjwks.exe
    c:\cjwks.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-27_f8a03a0541550faf12ddfc8f8acbc1c8_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4920
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\svoceu\fuzai.dll",DoVirusScan c:\cjwks.exe
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      PID:5484
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 5484 -s 480
        5⤵
        Program crash
        
        PID:3820

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 240 -p 5484 -ip 5484
1⤵
PID:1540

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

cjwks.exe

Path \??\c:\cjwks.exe
Size 86KB
SHA256 a483f90a7bb0d327d0cfc98c981fecddfe599db508d9730fd73b0bd10af25ba9
MD5 dadf0d24f3d356d39878c6bfdab4e136
SHA1 1afc151382a48b1d750f4a598eff1590e23029b5
SHA512 6482a63e39287781a05448c36f95d8996da6697d05352467ea097db50663e16ed46eff04edab5fe7af6312235666292d349526a2f7f4bb7f40b49e71e81cac59
SSDEEP 1536:TSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzl/:eSABNx6vb4RoI4pyjHYLhal01UoPXD
TLSH
T1E5839D07ABAA58D9E1206C70162D773593EF986F3B2597A38384FE4D9133DC1EC3614A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

fuzai.dll

Path \??\c:\svoceu\fuzai.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/4120-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4120-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4920-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5484-9-0x0000000010000000-0x0000000010032000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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