juko | b2abb5f115e9db3f0d099dab8c113c7ecf77b284a679637d909f628978bc03d5

General

Target
2026-05-09_1edc408feb4e60e6bdd0e6a2436a0a2c_elex_wannacry.exe
Size 32KB
Sample260509-3lctrshv9j
SHA256 b2abb5f115e9db3f0d099dab8c113c7ecf77b284a679637d909f628978bc03d5
MD5 1edc408feb4e60e6bdd0e6a2436a0a2c
SHA1 dfadff98611f30a284e73e382651cff33310beed
SHA512 97ef8a667fb1ebb01251e0bf7eb4536c2f5e459c07be5826c6d4dff28e0c5d39cfafe45dc11e49e2bb4369b6d6cb00bec0ebb429b593f744bddb104442ae2ce2
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHp9:OLsF2Kerc64sTiX2IV0Dhu9
TLSH
T18BE23A1B2AA17052C59320B0FA991F34C57D4CB6116BB066FB417B6928B2D63CFB0DCE
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/0x002b00000002b142-4.dat	family_juko
behavioral2/files/0x002000000002b14f-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3708	WINWORD.exe
4568	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-1-5-21-1383858298-2057492509-1726743289-1000\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	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	2026-05-09_1edc408feb4e60e6bdd0e6a2436a0a2c_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
2080	cmd.exe
1432	PING.EXE
1948	PING.EXE
3432	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1432	PING.EXE
1948	PING.EXE
3432	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5108 wrote to memory of 3708	5108	2026-05-09_1edc408feb4e60e6bdd0e6a2436a0a2c_elex_wannacry.exe	80
PID 3708 wrote to memory of 2080	3708	WINWORD.exe	81
PID 2080 wrote to memory of 1432	2080	cmd.exe	83
PID 2080 wrote to memory of 1948	2080	cmd.exe	84
PID 2080 wrote to memory of 3432	2080	cmd.exe	85
PID 2080 wrote to memory of 4568	2080	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-05-09_1edc408feb4e60e6bdd0e6a2436a0a2c_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-09_1edc408feb4e60e6bdd0e6a2436a0a2c_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5108
- 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:3708
- - 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\00002C00" 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:2080
  - - 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:1432
  - - 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:1948
  - - 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:3432
  - - 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:4568

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

00002C00

Path C:\Users\Admin\AppData\Roaming\Mozilla\00002C00
Size 32KB
SHA256 fe75a2a0ae50383a01763401898ea48cd0bf9cb838b87e075fb565d9ad043bd0
MD5 047d162adb20dfccc2707a4157de1ead
SHA1 f626297b1931496aca4a60b186597802565f54a6
SHA512 1fe36193651b1112449b259edf97cb9f20ad4f3d32c716ec3d4d388b89fe276f8927602e49bcec768a8a228560236d789c3cbc552fc383203d1caa4058645021
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHp0:OLsF2Kerc64sTiX2IV0Dhu0
TLSH
T120E23A1B2AA17052C59320B0FA991F34C57D4CB6116BB066FB417B6928B2D63CFB0DCE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 b2abb5f115e9db3f0d099dab8c113c7ecf77b284a679637d909f628978bc03d5
MD5 1edc408feb4e60e6bdd0e6a2436a0a2c
SHA1 dfadff98611f30a284e73e382651cff33310beed
SHA512 97ef8a667fb1ebb01251e0bf7eb4536c2f5e459c07be5826c6d4dff28e0c5d39cfafe45dc11e49e2bb4369b6d6cb00bec0ebb429b593f744bddb104442ae2ce2
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHp9:OLsF2Kerc64sTiX2IV0Dhu9
TLSH
T18BE23A1B2AA17052C59320B0FA991F34C57D4CB6116BB066FB417B6928B2D63CFB0DCE
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