juko | c7ff407e5f6495d21ea56ee0bcce579caada995375c3f93eba22088219574879

General

Target
2026-05-11_c2814e5a09aa5795c5e7232a1936db03_elex_wannacry.exe
Size 42KB
Sample260511-ra7dfsbx71
SHA256 c7ff407e5f6495d21ea56ee0bcce579caada995375c3f93eba22088219574879
MD5 c2814e5a09aa5795c5e7232a1936db03
SHA1 d9bd3a0cfb895db2927f4b2e41fa063184cf5936
SHA512 a2d7c7fc31c5add02ac369f9b055b3f1ec72f00ffcd5e374478d5e4e29b4c46339e9c8da20bafffa9987356e7736c00d08269aceb954973edd8617cc1f58df16
SSDEEP 768:zNZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqPNPWQHXFMcnrfrqx4RgutbGHix8f41t:z/LsF2Kerc64sTiX2IV0DgsfrfWJF2+G
TLSH
T18413171776A460D2CDB76074E91A4E30437E9CF664A7B317A72076202DB3D5ACFA02CE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery 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/0x000600000000f7e4-4.dat	family_juko
behavioral2/files/0x001a000000028e53-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4076	WINWORD.exe
6032	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-1-5-21-650218026-1419908266-2856590055-1000\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

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	2026-05-11_c2814e5a09aa5795c5e7232a1936db03_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
2024	cmd.exe
5048	PING.EXE
1028	PING.EXE
5364	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5048	PING.EXE
1028	PING.EXE
5364	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3328 wrote to memory of 4076	3328	2026-05-11_c2814e5a09aa5795c5e7232a1936db03_elex_wannacry.exe	79
PID 4076 wrote to memory of 2024	4076	WINWORD.exe	80
PID 2024 wrote to memory of 5048	2024	cmd.exe	82
PID 2024 wrote to memory of 1028	2024	cmd.exe	83
PID 2024 wrote to memory of 5364	2024	cmd.exe	84
PID 2024 wrote to memory of 6032	2024	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\2026-05-11_c2814e5a09aa5795c5e7232a1936db03_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-11_c2814e5a09aa5795c5e7232a1936db03_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3328
- 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:4076
- - 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\00005A72" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:2024
  - - 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:5048
  - - 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:1028
  - - 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:5364
  - - 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:6032

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

00005A72

Path C:\Users\Admin\AppData\Roaming\Mozilla\00005A72
Size 42KB
SHA256 8a9b02c6e3cc11dde9fbf51cddb6f610a70cb606d82f00126372070ad0d175ce
MD5 be69babde8092352ecf632cbea817691
SHA1 78124d669fc5a408181588a2df8dd598077709aa
SHA512 f99a1319efcc15c64643fe54c82b7ca5fc940ad4518aee9f06e38ba2050ea37745e971908dd88e03a8e954b8d0a727d0433a655d03359b41f8bdbc40aea2fed5
SSDEEP 768:zNZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqPNPWQHXFMcnrfrqx4RgutbGHix8f41Q:z/LsF2Kerc64sTiX2IV0DgsfrfWJF2+7
TLSH
T1BF13171376A460D2CDB76074E91A4E30437E9CF664A7B307A72076202DB3D5ACFA02CE
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 42KB
SHA256 c7ff407e5f6495d21ea56ee0bcce579caada995375c3f93eba22088219574879
MD5 c2814e5a09aa5795c5e7232a1936db03
SHA1 d9bd3a0cfb895db2927f4b2e41fa063184cf5936
SHA512 a2d7c7fc31c5add02ac369f9b055b3f1ec72f00ffcd5e374478d5e4e29b4c46339e9c8da20bafffa9987356e7736c00d08269aceb954973edd8617cc1f58df16
SSDEEP 768:zNZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqPNPWQHXFMcnrfrqx4RgutbGHix8f41t:z/LsF2Kerc64sTiX2IV0DgsfrfWJF2+G
TLSH
T18413171776A460D2CDB76074E91A4E30437E9CF664A7B317A72076202DB3D5ACFA02CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads