juko | cc892c1fe18eb9a68e9f3896e89a1ce7b58fcafc0a92ba81f87a126ba6003c6f

General

Target
2026-09-01_681ce167d2ce6f195716850128c75448_elex_wannacry.exe
Size 32KB
Sample260903-mm42msgf58
SHA256 cc892c1fe18eb9a68e9f3896e89a1ce7b58fcafc0a92ba81f87a126ba6003c6f
MD5 681ce167d2ce6f195716850128c75448
SHA1 779c4b1a879db7fc681ce7eada195c5da3acbb4e
SHA512 3b9dd49df65470ccfbd291608895c81c9beb9c6ff1a18678af28f226440180185da34f544f0786f69cedae3d7170a1e3523cf18260d34e156e6f7372a835c524
SSDEEP 768:uNZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqwNPWQHD4kqXlT:cLsF2Kerc64sTiX2IV0DzY4kMZ
TLSH
T178E23B2B6AA17052C59320B0F9592F35C43D9CB9016BB062F7417B6928B2D63CF71ACE
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
behavioral1/files/0x000b000000024366-4.dat	family_juko
behavioral1/files/0x000900000002453d-12.dat	family_juko

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-540052884-2969440504-464782435-1000\Control Panel\International\Geo\Nation	2026-09-01_681ce167d2ce6f195716850128c75448_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-540052884-2969440504-464782435-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
4620	WINWORD.exe
416	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-1-5-21-540052884-2969440504-464782435-1000\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
3892	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	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	2026-09-01_681ce167d2ce6f195716850128c75448_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

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
3892	cmd.exe
2348	PING.EXE
1832	PING.EXE
4704	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4704	PING.EXE
2348	PING.EXE
1832	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1788 wrote to memory of 4620	1788	2026-09-01_681ce167d2ce6f195716850128c75448_elex_wannacry.exe	85
PID 4620 wrote to memory of 3892	4620	WINWORD.exe	86
PID 3892 wrote to memory of 2348	3892	cmd.exe	88
PID 3892 wrote to memory of 1832	3892	cmd.exe	89
PID 3892 wrote to memory of 4704	3892	cmd.exe	90
PID 3892 wrote to memory of 416	3892	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\2026-09-01_681ce167d2ce6f195716850128c75448_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-01_681ce167d2ce6f195716850128c75448_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1788
- C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
  "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" -r
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4620
- - 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\000015C3" 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:3892
  - - 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:2348
  - - 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:1832
  - - 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:4704
  - - 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:416

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

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

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

000015C3

Path C:\Users\Admin\AppData\Roaming\Mozilla\000015C3
Size 32KB
SHA256 5c59fc9e25719ad3107c39dfc0f6392dc4b08aa4cc0f781606fe02d6bdc050a6
MD5 f32122a01b30c395b913db132c81fe21
SHA1 9aced1cae54f94a12a8b5dd7b39fd685ec6ff54e
SHA512 45aa2fdd70470f35bc7150f31d062557afeb14bf82c827531a01bdd48fac8c3b4eec449e22b9775cf77b67b2cae94035f6aa5e9dd6951997c8128f543fda4d52
SSDEEP 768:uNZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqwNPWQHD4kqXlt:cLsF2Kerc64sTiX2IV0DzY4kM3
TLSH
T1CBE23B2B6AA17052C59320B0F9592F35C43D9CB9016BB066F7417B6928B2D63CF71ECE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 cc892c1fe18eb9a68e9f3896e89a1ce7b58fcafc0a92ba81f87a126ba6003c6f
MD5 681ce167d2ce6f195716850128c75448
SHA1 779c4b1a879db7fc681ce7eada195c5da3acbb4e
SHA512 3b9dd49df65470ccfbd291608895c81c9beb9c6ff1a18678af28f226440180185da34f544f0786f69cedae3d7170a1e3523cf18260d34e156e6f7372a835c524
SSDEEP 768:uNZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqwNPWQHD4kqXlT:cLsF2Kerc64sTiX2IV0DzY4kMZ
TLSH
T178E23B2B6AA17052C59320B0F9592F35C43D9CB9016BB062F7417B6928B2D63CF71ACE
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