juko | 3de4534c8e16799721b29a64b36ddecf52ea610205fc93025c965789eebadefb

General

Target
2026-09-20_f6d1e7a6a271e7db50e970aebe84b138_elex_wannacry.exe
Size 32KB
Sample260920-174hhadd79
SHA256 3de4534c8e16799721b29a64b36ddecf52ea610205fc93025c965789eebadefb
MD5 f6d1e7a6a271e7db50e970aebe84b138
SHA1 fb553e52f765623191646014dea7f1523059dd48
SHA512 6d132faa85ad2903911464201d26afbbabc2480de757d934267093155583c28478fb9b530ec369703ab82745e6a0ae3c83d4853f2a4e67cb7d29987a6fb4cc8a
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqXNPWQHbfs:tLsF2Kerc64sTiX2IV0DYQE
TLSH
T108E23B2B6AA17052C59320F0F9591F34C43D9DB9116BB0A2F7417B6928B2D63CF71ACE
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 2 IoCs

resource	yara_rule
behavioral2/files/0x001200000001b8aa-4.dat	family_juko
behavioral2/files/0x000f00000001c580-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3692	WINWORD.exe
1200	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-1-5-21-4057491610-3392471755-192832105-1000\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
472	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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-09-20_f6d1e7a6a271e7db50e970aebe84b138_elex_wannacry.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
472	cmd.exe
4588	PING.EXE
5436	PING.EXE
3724	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4588	PING.EXE
5436	PING.EXE
3724	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 912 wrote to memory of 3692	912	2026-09-20_f6d1e7a6a271e7db50e970aebe84b138_elex_wannacry.exe	90
PID 3692 wrote to memory of 472	3692	WINWORD.exe	91
PID 472 wrote to memory of 4588	472	cmd.exe	93
PID 472 wrote to memory of 5436	472	cmd.exe	94
PID 472 wrote to memory of 3724	472	cmd.exe	95
PID 472 wrote to memory of 1200	472	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\2026-09-20_f6d1e7a6a271e7db50e970aebe84b138_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-20_f6d1e7a6a271e7db50e970aebe84b138_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:912
- 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:3692
- - 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\0000709C" 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:472
  - - 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:4588
  - - 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:5436
  - - 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:3724
  - - 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:1200

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

Replay Monitor

Loading Replay Monitor...

Downloads

0000709C

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000709C
Size 32KB
SHA256 3d4429119331c0d05583a4d445e453e76393735fe0880fc997ed1dcea870f3bc
MD5 b70f2204361c07814b2964048c7d04c4
SHA1 f990a897637a4d8bd03a1472290c86930762a710
SHA512 d86da65a0d29af72601d93a01da8dca29f98a1d862fc1c118e16b938d249709d125161005f68b76d9a9d4ccd5cec45723ad216711d53c4655aafe6902f1208b8
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqXNPWQHbf2:tLsF2Kerc64sTiX2IV0DYQe
TLSH
T1F5E22A2B6AA17052C59320F0F9591F34C43D9DB9116BB0A2F7417B6928B2D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 3de4534c8e16799721b29a64b36ddecf52ea610205fc93025c965789eebadefb
MD5 f6d1e7a6a271e7db50e970aebe84b138
SHA1 fb553e52f765623191646014dea7f1523059dd48
SHA512 6d132faa85ad2903911464201d26afbbabc2480de757d934267093155583c28478fb9b530ec369703ab82745e6a0ae3c83d4853f2a4e67cb7d29987a6fb4cc8a
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqXNPWQHbfs:tLsF2Kerc64sTiX2IV0DYQE
TLSH
T108E23B2B6AA17052C59320F0F9591F34C43D9DB9116BB0A2F7417B6928B2D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads