d8a19f43962c8a54b0658479ab6238ffc13c9f5422057eed93301516b488571d

General

Target
2026-09-08_bde43ff75470c5febc831232c7a7b4c2_elex_wannacry.exe
Size 88KB
Sample260908-py547abp2w
SHA256 d8a19f43962c8a54b0658479ab6238ffc13c9f5422057eed93301516b488571d
MD5 bde43ff75470c5febc831232c7a7b4c2
SHA1 0abf50df1a253c9780f2cec305448e59668f8f29
SHA512 3c573f40cc68bd9d9e79fd310cf3dd7ab442455362d27fc6763dc9d421702f8b9f115130d380530d90969b5500ee60e796a0d7deaba93400fa9277e53afac88b
SSDEEP 1536:TSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlj:eSABNx6vb4RoI4pyjHYLhal01UoPX
TLSH
T188939D07ABA698E9E1206C70162D773493EF986F3B2597A38344FE4D9133DC5EC3614A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
4768	effzl.exe

Executes dropped EXE 1 IoCs

pid	Process
4768	effzl.exe

Loads dropped DLL 1 IoCs

pid	Process
1204	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
6624	cmd.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
6640	1204	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	2026-09-08_bde43ff75470c5febc831232c7a7b4c2_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	effzl.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
6624	cmd.exe
3684	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3684	PING.EXE

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4700	2026-09-08_bde43ff75470c5febc831232c7a7b4c2_elex_wannacry.exe
4768	effzl.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4700 wrote to memory of 6624	4700	2026-09-08_bde43ff75470c5febc831232c7a7b4c2_elex_wannacry.exe	89
PID 6624 wrote to memory of 3684	6624	cmd.exe	91
PID 6624 wrote to memory of 4768	6624	cmd.exe	92
PID 4768 wrote to memory of 1204	4768	effzl.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-09-08_bde43ff75470c5febc831232c7a7b4c2_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-08_bde43ff75470c5febc831232c7a7b4c2_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4700
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\effzl.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-08_bde43ff75470c5febc831232c7a7b4c2_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:6624
- - 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:3684
- - \??\c:\effzl.exe
    c:\effzl.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-08_bde43ff75470c5febc831232c7a7b4c2_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4768
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\vvufa\iuasfisr.dll",DoVirusScan c:\effzl.exe
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      PID:1204
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1204 -s 484
        5⤵
        Program crash
        
        PID:6640

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1204 -ip 1204
1⤵
PID:5392

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

effzl.exe

Path \??\c:\effzl.exe
Size 88KB
SHA256 10da758f0e23cfc021612810321c290c10bbdf9ffd313a7b26361d683ead4727
MD5 c1d9821f6d0923f74d37e5cf38f4b389
SHA1 1072bc5f938df92c81fe26ad5735fcb67499b769
SHA512 ee18d9d65a90b6c87af5f04363f08139aedf9323c23a5492d2abdc6b2cb2941091970b26970d938fe1e6795743f2016cecda46b4403dacd2b7af27144591b26a
SSDEEP 1536:TSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlO:eSABNx6vb4RoI4pyjHYLhal01UoPX6
TLSH
T1B4939D07ABA598D9E1206C70162D773493EF986F3B2497A38344FE4DA533DC5EC3614A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

iuasfisr.dll

Path \??\c:\vvufa\iuasfisr.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/1204-9-0x0000000010000000-0x0000000010032000-memory.dmp

Download

memory/4700-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4700-2-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/4768-6-0x0000000000400000-0x0000000000417000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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