juko | ee01fd09ef0066990a2dfe5c11e36cc5412ba40df4e7eab2241ae85cb01f64d5

General

Target
2026-08-09_adab094ced05d207699b96e3e159de96_elex_wannacry.exe
Size 94KB
Sample260809-em75ashj61
SHA256 ee01fd09ef0066990a2dfe5c11e36cc5412ba40df4e7eab2241ae85cb01f64d5
MD5 adab094ced05d207699b96e3e159de96
SHA1 de7ad527734c746e31305908ba6800c6f43ca4e1
SHA512 57670d88fb85520574ed0325667feafb53df3a930fcf75dabd7d5977a89a9ed56e700de934da7b584c4845e732f8b98946c12e135c6d7cd214cf45015dd093aa
SSDEEP 1536:RLsF2Kerc64sTiX2IV0DxY8rqBLSaVl17oMvTbMvY4+oi9u6G6/N7:RLy2Kerc64CiGImFYgUBWTb4/N7
TLSH
T162937C2157A85153F0B246B0AD761B3098B97CB56AB3B21EBB03774D1871D21FF34B8A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution juko persistence trojan

Malware Config

Signatures

Family: Juko
Juko is a trojan written in C++.
trojan juko

Detects Juko 7 IoCs

resource	yara_rule
behavioral2/memory/3820-0-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko
behavioral2/files/0x00080000000187d5-5.dat	family_juko
behavioral2/memory/3820-10-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko
behavioral2/memory/3952-12-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko
behavioral2/files/0x001300000001c43e-13.dat	family_juko
behavioral2/memory/4844-15-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko
behavioral2/memory/4844-16-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3952	WINWORD.exe
4844	WINWORD.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1875162379-3804078649-638427191-1000\Software\Microsoft\Windows\CurrentVersion\Run\WINWORD = "C:\\Users\\Admin\\AppData\\Roaming\\Mozilla\\WINWORD.exe -r"	WINWORD.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 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
5824	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 7 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	2026-08-09_adab094ced05d207699b96e3e159de96_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 4 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
5824	cmd.exe
5988	PING.EXE
4512	PING.EXE
5672	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5988	PING.EXE
4512	PING.EXE
5672	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3820 wrote to memory of 3952	3820	2026-08-09_adab094ced05d207699b96e3e159de96_elex_wannacry.exe	90
PID 3952 wrote to memory of 5824	3952	WINWORD.exe	91
PID 5824 wrote to memory of 5988	5824	cmd.exe	93
PID 5824 wrote to memory of 4512	5824	cmd.exe	94
PID 5824 wrote to memory of 5672	5824	cmd.exe	95
PID 5824 wrote to memory of 4844	5824	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\2026-08-09_adab094ced05d207699b96e3e159de96_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-09_adab094ced05d207699b96e3e159de96_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3820
- C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
  "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" -r
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3952
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c ping 127.0.0.1 -n 2&del "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe"&ping 127.0.0.1 -n 2&rename "C:\Users\Admin\AppData\Roaming\Mozilla\00001434" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:5824
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:5988
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:4512
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:5672
  - - C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
      "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      PID:4844

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

Modify Registry

1

T1112

Credential Access

Discovery

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

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

00001434

Path C:\Users\Admin\AppData\Roaming\Mozilla\00001434
Size 94KB
SHA256 d44cbf58620068a9d0475e90e99f46452bb5175d43646b9741f9aee439791c98
MD5 9fc0fd8592f46807e3806e61173b1bf4
SHA1 19a6362fcc6f50d31c1c13cdd67db08b50968401
SHA512 bc0e423f79d6987621a6228af63c681fcc3016353eeef2c52c4219df7743e81c15fc0b82ed8b97e8c27282afba6d645ccee16a8af2af12da506f19cbfc53421c
SSDEEP 1536:RLsF2Kerc64sTiX2IV0DxY8rqBLSaVl17oMvTbMvY4+oi9u6G6/NI:RLy2Kerc64CiGImFYgUBWTb4/NI
TLSH
T1B1937C2157A85153F0B246B0AD761B3098B97CB56AB3B21EBB03774D1871D21FF34B8A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 94KB
SHA256 ee01fd09ef0066990a2dfe5c11e36cc5412ba40df4e7eab2241ae85cb01f64d5
MD5 adab094ced05d207699b96e3e159de96
SHA1 de7ad527734c746e31305908ba6800c6f43ca4e1
SHA512 57670d88fb85520574ed0325667feafb53df3a930fcf75dabd7d5977a89a9ed56e700de934da7b584c4845e732f8b98946c12e135c6d7cd214cf45015dd093aa
SSDEEP 1536:RLsF2Kerc64sTiX2IV0DxY8rqBLSaVl17oMvTbMvY4+oi9u6G6/N7:RLy2Kerc64CiGImFYgUBWTb4/N7
TLSH
T162937C2157A85153F0B246B0AD761B3098B97CB56AB3B21EBB03774D1871D21FF34B8A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3820-0-0x0000000000400000-0x000000000042B000-memory.dmp

Download

memory/3820-10-0x0000000000400000-0x000000000042B000-memory.dmp

Download

memory/3952-12-0x0000000000400000-0x000000000042B000-memory.dmp

Download

memory/4844-15-0x0000000000400000-0x000000000042B000-memory.dmp

Download

memory/4844-16-0x0000000000400000-0x000000000042B000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads