7847a11c7a8a4df9b6aa42956abb08eaded9e1448a393eb92f5841ce3dff603f

General

Target
2026-08-21_efb5a438b873fcf39e1247d5c803c257_elex_wannacry.exe
Size 66KB
Sample260821-kl71sswfph
SHA256 7847a11c7a8a4df9b6aa42956abb08eaded9e1448a393eb92f5841ce3dff603f
MD5 efb5a438b873fcf39e1247d5c803c257
SHA1 636ab3a1449e326d64abd040c35ef16c2d332e25
SHA512 51150c8c6ceb292193de32686045f106ff6843a268eeae18c96f57f076712695e3fb6ba1e7fb176377be8f541f49147c376d00476d6b8384c6e5117d6e6a672c
SSDEEP 1536:X8tyvrSF+FZOmonEX2Dfpk8oJGap7tED3NE0NITOKQawoVn7:styPzouIS9HF2D3N9NWZd7
TLSH
T10563E1A33ED949A1D4142730304BB7338F2176A99643E529EB27DCA199DE174FC05B8F
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

discovery execution persistence privilege_escalation

Malware Config

Signatures

Creates a file in the Startup directory 1 TTPs 1 IoCs

A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

persistence privilege_escalation

Registry Run Keys / Startup Folder

T1547.001

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Update.bat	sqlserver.exe

Executes dropped EXE 2 IoCs

pid	Process
4064	sqlserver.exe
2860	2026-08-21_efb5a438b873fcf39e1247d5c803c257_elex_wannacry.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\dumpkernel.exe	2026-08-21_efb5a438b873fcf39e1247d5c803c257_elex_wannacry.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 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
2916	cmd.exe
3284	cmd.exe

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	2026-08-21_efb5a438b873fcf39e1247d5c803c257_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-21_efb5a438b873fcf39e1247d5c803c257_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sqlserver.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	sqlserver.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	sqlserver.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5000 wrote to memory of 4064	5000	2026-08-21_efb5a438b873fcf39e1247d5c803c257_elex_wannacry.exe	89
PID 5000 wrote to memory of 2916	5000	2026-08-21_efb5a438b873fcf39e1247d5c803c257_elex_wannacry.exe	90
PID 5000 wrote to memory of 3284	5000	2026-08-21_efb5a438b873fcf39e1247d5c803c257_elex_wannacry.exe	92
PID 3284 wrote to memory of 2860	3284	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-08-21_efb5a438b873fcf39e1247d5c803c257_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-21_efb5a438b873fcf39e1247d5c803c257_elex_wannacry.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5000
- C:\Windows\temp\sqlserver.exe
  "C:\Windows\temp\sqlserver.exe"
  2⤵
  - Creates a file in the Startup directory
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  PID:4064
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Windows\temp\tttdelzzz.bat" "
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:2916
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Windows\temp\tttbrozzz.bat" "
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3284
- - C:\Users\Admin\AppData\Local\Temp\2026-08-21_efb5a438b873fcf39e1247d5c803c257_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-21_efb5a438b873fcf39e1247d5c803c257_elex_wannacry.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2860

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

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

sqlserver.exe

Path C:\Windows\Temp\sqlserver.exe
Size 15KB
SHA256 23fea8b183632f91e5a4d1d6a43283846c734eee820eb2084ad428b7cbe92d53
MD5 c83a01f25ea0e1c9200c5893aa2d2199
SHA1 d0c53a1aaf2be6aec7b0f73e767b62fffb010f08
SHA512 3961ce6f4e8871a5032fc5616e057e15892d846270d572f156aebd5557b72cf5dd0139e87306073243b366851e6db09b83f41294a8230836597c2c840e2704d7
SSDEEP 384:y4Od9Q2hJy5g75oOuHh7parHdAI0ptTvzTn:y4aQ2hJyjOuHhntzz
TLSH
T1D3623D5A79479F43C594C0B12B68AB38E7B9B4773D188053D740CE483E7F8819529F8E
MD5 SHA1 SHA512 SSDEEP TLSH

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tttbrozzz.bat

Path C:\Windows\Temp\tttbrozzz.bat
Size 582B
SHA256 2410c82612f5446c449c60f2e36937139bf3a5c85b750cb8ed85b083824cb0dd
MD5 81be79c63440c647776c105dfc51ad8e
SHA1 e6de51a7f97de3bcaad64639d0e0f7781158891b
SHA512 81f8e82305ca22ebdf7e27381fab9034622e8bf94f09b0ba858313d90d846df565a9600e0a512c6f289be824fbe1f7d16832e7c66de82ac3668e3bfcf09b46c3
TLSH
T14DF04C14C2FE85662860A0125FA6590EA310F879BE942F524F00434AE59080BFE97202
MD5 SHA1 SHA512 TLSH

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tttdelzzz.bat

Path C:\Windows\Temp\tttdelzzz.bat
Size 313B
SHA256 09c4cfb7c4caf7edb72105fec1af729ca0eb6f7f4ed60aed9ad600155e166aee
MD5 e9b2da15b7e577fea99155ca818fe68e
SHA1 ea93520f6247b9a78a553522084a1f79b39dfa3f
SHA512 bba0a723691707fda211c50fe4da73d1abdafb0e7f635312d8cc6877804d7e3d912cef033fd9dbf0263f939a795faa536641b2e711d2a592be173c53580b90a9
TLSH
T17DE0721899FC4A435C30A012AFA21A4EE204F8B92D892F834F028391E99180EBCCB202
MD5 SHA1 SHA512 TLSH

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Server32History.dat

Path C:\Windows\temp\Server32History.dat
Size 21KB
SHA256 2b77c10a72b76e907f82ba26d59bdd59df1c6e8a7dee6ad19d4e51aa78b92a42
MD5 4e4aad9e67d25d9898ee557037abf245
SHA1 daa539a4c182c4657c06e6e3d679ab6098c5850b
SHA512 5490b9c9412c05842c39605450206f1a27359a49f48367237da369c4b1988677f4a063ec85e49bfbb60649678fae11b978fd2eb655c0005a226f17774629db3d
SSDEEP 384:H4Pt0PzH0nk2LyGbUBxOH09OhkT1NU2qxdeWe+JWe:YF0Pz0npyGbD09O6TXGB
TLSH
T1A3A239433F8B8933D2B142714E32A669B7A7F0718E346E174B50024D2EB84935DFAB29
MD5 SHA1 SHA512 SSDEEP TLSH

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads