juko | f33f2439e38892f435d43896b027d675a374590663c84cf4006035c1483d51ca

General

Target
2026-04-25_74b7ad65fb66be953bd286d21776c8d8_elex_wannacry.exe
Size 42KB
Sample260425-ccmphabx2t
SHA256 f33f2439e38892f435d43896b027d675a374590663c84cf4006035c1483d51ca
MD5 74b7ad65fb66be953bd286d21776c8d8
SHA1 a171b030c980cac663ba7bab793ba35db6abb104
SHA512 848fcaf1ef17862d9526b31c9ef4e741ee950174bae73aa996bcd792365743f71f2a02f660ebcaef0ea82ebb5d378db56f7b1a22ad7bc649b53afa7c065aa5a8
SSDEEP 768:zNZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqPNPWQHXFMcnrfrqx4RgutbGHix8f41g:z/LsF2Kerc64sTiX2IV0DgsfrfWJF2+f
TLSH
T1AA13171776A460D2CDB76074E91A5E30437E9CF664A7B317A72076202DB3D5ACFA02CE
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/0x001f00000002b0b8-4.dat	family_juko
behavioral2/files/0x001a00000002b39f-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4108	WINWORD.exe
1624	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-1-5-21-2122505878-652277452-2375749442-1000\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	2026-04-25_74b7ad65fb66be953bd286d21776c8d8_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
884	cmd.exe
4572	PING.EXE
2648	PING.EXE
1504	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4572	PING.EXE
2648	PING.EXE
1504	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3240 wrote to memory of 4108	3240	2026-04-25_74b7ad65fb66be953bd286d21776c8d8_elex_wannacry.exe	80
PID 4108 wrote to memory of 884	4108	WINWORD.exe	81
PID 884 wrote to memory of 4572	884	cmd.exe	83
PID 884 wrote to memory of 2648	884	cmd.exe	84
PID 884 wrote to memory of 1504	884	cmd.exe	85
PID 884 wrote to memory of 1624	884	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-04-25_74b7ad65fb66be953bd286d21776c8d8_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-25_74b7ad65fb66be953bd286d21776c8d8_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3240
- 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:4108
- - 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\000030AA" 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:884
  - - 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:4572
  - - 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:2648
  - - 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:1504
  - - 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:1624

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

Replay Monitor

Loading Replay Monitor...

Downloads

000030AA

Path C:\Users\Admin\AppData\Roaming\Mozilla\000030AA
Size 42KB
SHA256 30fdcebf439929c2e9873c33d9705d1fe190d6539af9dada4694ad74bc81dbd9
MD5 066a5e3e6dff54326fc34260a65f9371
SHA1 7327398df0c97d750e62967817cb4d07d070062a
SHA512 b6d5565e7e4d32a78f1c52fe1e3e52d04a0daf4d00057b17f3dfaf0c022c87c2be581d5373d6bf5845088a85fa441b3fb293ca7db1fc2f03ada6631f02e3fe5a
SSDEEP 768:zNZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqPNPWQHXFMcnrfrqx4RgutbGHix8f41y:z/LsF2Kerc64sTiX2IV0DgsfrfWJF2+N
TLSH
T17E13171776A460D2CDB76074E91A4E30437E9DF664A7B317A72076202DB3D5ACFA02CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 42KB
SHA256 f33f2439e38892f435d43896b027d675a374590663c84cf4006035c1483d51ca
MD5 74b7ad65fb66be953bd286d21776c8d8
SHA1 a171b030c980cac663ba7bab793ba35db6abb104
SHA512 848fcaf1ef17862d9526b31c9ef4e741ee950174bae73aa996bcd792365743f71f2a02f660ebcaef0ea82ebb5d378db56f7b1a22ad7bc649b53afa7c065aa5a8
SSDEEP 768:zNZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqPNPWQHXFMcnrfrqx4RgutbGHix8f41g:z/LsF2Kerc64sTiX2IV0DgsfrfWJF2+f
TLSH
T1AA13171776A460D2CDB76074E91A5E30437E9CF664A7B317A72076202DB3D5ACFA02CE
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