1591707c7252b2fcf8a3d0e86a77051765c5806a56eb1f9186c0c56b7169f830

General

Target
2026-09-05_5533084ea81073ff0fc590a6acaf0514_elex_wannacry.exe
Size 87KB
Sample260907-13phsawgje
SHA256 1591707c7252b2fcf8a3d0e86a77051765c5806a56eb1f9186c0c56b7169f830
MD5 5533084ea81073ff0fc590a6acaf0514
SHA1 343afbe834fb2b42e11d91a698ed011917dd9fc6
SHA512 ccb688a07d84c72ef44e7fa9462a3f1c578a4b1f5837c25445205dc52a40bd91a206e0778ad88f160792e0c2a7e8e1b0c832b0ac6fcd2d71100371b082f014f9
SSDEEP 1536:TSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlP:eSABNx6vb4RoI4pyjHYLhal01UoPXT
TLSH
T1C7939D07ABAA58E9E1206C70162D773593EF986F3B2597A38344FE4D9133DC1EC3614A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
3148	yfvkmnzk.exe

Executes dropped EXE 1 IoCs

pid	Process
3148	yfvkmnzk.exe

Loads dropped DLL 1 IoCs

pid	Process
5100	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
2016	cmd.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4744	5100	WerFault.exe	91

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	2026-09-05_5533084ea81073ff0fc590a6acaf0514_elex_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	yfvkmnzk.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
2016	cmd.exe
2448	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2448	PING.EXE

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3900	2026-09-05_5533084ea81073ff0fc590a6acaf0514_elex_wannacry.exe
3148	yfvkmnzk.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3900 wrote to memory of 2016	3900	2026-09-05_5533084ea81073ff0fc590a6acaf0514_elex_wannacry.exe	87
PID 2016 wrote to memory of 2448	2016	cmd.exe	89
PID 2016 wrote to memory of 3148	2016	cmd.exe	90
PID 3148 wrote to memory of 5100	3148	yfvkmnzk.exe	91

C:\Users\Admin\AppData\Local\Temp\2026-09-05_5533084ea81073ff0fc590a6acaf0514_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-05_5533084ea81073ff0fc590a6acaf0514_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3900
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\yfvkmnzk.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-05_5533084ea81073ff0fc590a6acaf0514_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:2016
- - 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:2448
- - \??\c:\yfvkmnzk.exe
    c:\yfvkmnzk.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-05_5533084ea81073ff0fc590a6acaf0514_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3148
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\ghcha\zpjcf.dll",DoVirusScan c:\yfvkmnzk.exe
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      PID:5100
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 5100 -s 560
        5⤵
        Program crash
        
        PID:4744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 5100 -ip 5100
1⤵
PID:4180

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

yfvkmnzk.exe

Path C:\yfvkmnzk.exe
Size 87KB
SHA256 ff713ca0abbbe449c83591255ce993e3fff555f49e042a16e1de3d30af44cfe7
MD5 0724f189f2a22589b84038d215caa412
SHA1 b4eb065e8873dca635a8a2b7cd364132d5d93779
SHA512 cfe618900868ec9536806bdbfad0368751c17018c7ea52490dbecaf04adffb25e7e537501430a1012c9b96de93bb0ed129c87f29108cffdc2e12007f00f4cbbb
SSDEEP 1536:TSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzll:eSABNx6vb4RoI4pyjHYLhal01UoPX5
TLSH
T190939D07ABA598D9E1206C70162D773593EE986F3B2497A38344FE4D9133DC5EC3614E
MD5 SHA1 SHA512 SSDEEP TLSH

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zpjcf.dll

Path \??\c:\ghcha\zpjcf.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/3148-7-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3900-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3900-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5100-10-0x0000000010000000-0x0000000010032000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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