juko | 64078b6324a7dbe60e511ab08d56fe0f0e2b454ace7cff0c95464fd2574e7ecd

General

Target
2026-05-29_f8f56d50554d6fa34c316a4d7fd5c0f0_elex_wannacry.exe
Size 32KB
Sample260529-lm15bagx21
SHA256 64078b6324a7dbe60e511ab08d56fe0f0e2b454ace7cff0c95464fd2574e7ecd
MD5 f8f56d50554d6fa34c316a4d7fd5c0f0
SHA1 e480d1e95a0f12a96163cc3fb9def94770b719b2
SHA512 c2aa7fc868b2935916ea82a7946b9b9fdb8ccb4c21076bd830bcdfae66e9d8ef50a5fdaced7cfa28990a5fc9d09b36d0425879a1eb5d41e35eecb9e41ce3a078
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpe:OLsF2Kerc64sTiX2IV0Dhue
TLSH
T105E23A1B2AA17052C59320B0FA991F34C57D4DB6116BB066FB417B6928B2D63CFB0DCE
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/0x002000000002b309-4.dat	family_juko
behavioral2/files/0x001a00000002b511-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5076	WINWORD.exe
4948	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-1-5-21-1636999435-3883760687-346127294-1000\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	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	2026-05-29_f8f56d50554d6fa34c316a4d7fd5c0f0_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
5096	PING.EXE
2480	PING.EXE
2992	cmd.exe
3548	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3548	PING.EXE
5096	PING.EXE
2480	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1640 wrote to memory of 5076	1640	2026-05-29_f8f56d50554d6fa34c316a4d7fd5c0f0_elex_wannacry.exe	80
PID 5076 wrote to memory of 2992	5076	WINWORD.exe	81
PID 2992 wrote to memory of 3548	2992	cmd.exe	83
PID 2992 wrote to memory of 5096	2992	cmd.exe	84
PID 2992 wrote to memory of 2480	2992	cmd.exe	85
PID 2992 wrote to memory of 4948	2992	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-05-29_f8f56d50554d6fa34c316a4d7fd5c0f0_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-29_f8f56d50554d6fa34c316a4d7fd5c0f0_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1640
- 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:5076
- - 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\00006010" 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:2992
  - - 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:3548
  - - 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:5096
  - - 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:2480
  - - 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:4948

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

00006010

Path C:\Users\Admin\AppData\Roaming\Mozilla\00006010
Size 32KB
SHA256 d47ced4df3b2e50854a72a8d36a55ad8c28b481cebe1025a97ad920fd58b9fc5
MD5 34f5be5b47270ac3fad19dcf260cf797
SHA1 03625e85a3ec8fa9cdfc8dab648f023031787521
SHA512 dfacbdf0ea76a90f71ad7c08d2fd3f0f573eb0a3166f017a8ee6b102054bee56c50d2f449e92fa4b17010aebc0900104ad092f8b8f43354739b3b901d70f2dac
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpy:OLsF2Kerc64sTiX2IV0Dhuy
TLSH
T1C4E23A1B2AA17052C59320B0FA991F34C57D4CB6116BB066FB417B6928B2D63CFB0DCE
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 64078b6324a7dbe60e511ab08d56fe0f0e2b454ace7cff0c95464fd2574e7ecd
MD5 f8f56d50554d6fa34c316a4d7fd5c0f0
SHA1 e480d1e95a0f12a96163cc3fb9def94770b719b2
SHA512 c2aa7fc868b2935916ea82a7946b9b9fdb8ccb4c21076bd830bcdfae66e9d8ef50a5fdaced7cfa28990a5fc9d09b36d0425879a1eb5d41e35eecb9e41ce3a078
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpe:OLsF2Kerc64sTiX2IV0Dhue
TLSH
T105E23A1B2AA17052C59320B0FA991F34C57D4DB6116BB066FB417B6928B2D63CFB0DCE
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