juko | ecce3e1c69fd831e7b2f424e9f55eba2364fa00572904130ee39ea3430df4608

General

Target
2026-06-04_6272939a7422102d3eefdeb4ae9b6662_elex_wannacry.exe
Size 64KB
Sample260604-h931mscs2k
SHA256 ecce3e1c69fd831e7b2f424e9f55eba2364fa00572904130ee39ea3430df4608
MD5 6272939a7422102d3eefdeb4ae9b6662
SHA1 958aff921de944a3cce20a01670fc2df8c2ae772
SHA512 d8d45764552653614366d18b098c413cc07dd25345f6a66256c4eaf606f7c21bf923313c89dae313b5d6dce30493612ffe29c03ea07fff798a1b0adb8fb1998d
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uu:sLy2Kerc64CiGIm8so28u
TLSH
T114536C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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/0x0012000000025ee6-4.dat	family_juko
behavioral2/files/0x000300000002a8f9-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5916	WINWORD.exe
6020	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-1-5-21-1768642833-2142038154-4041560723-1000\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	2026-06-04_6272939a7422102d3eefdeb4ae9b6662_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
4980	cmd.exe
2968	PING.EXE
6076	PING.EXE
1656	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2968	PING.EXE
6076	PING.EXE
1656	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3700 wrote to memory of 5916	3700	2026-06-04_6272939a7422102d3eefdeb4ae9b6662_elex_wannacry.exe	80
PID 5916 wrote to memory of 4980	5916	WINWORD.exe	81
PID 4980 wrote to memory of 2968	4980	cmd.exe	83
PID 4980 wrote to memory of 6076	4980	cmd.exe	84
PID 4980 wrote to memory of 1656	4980	cmd.exe	85
PID 4980 wrote to memory of 6020	4980	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-06-04_6272939a7422102d3eefdeb4ae9b6662_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-04_6272939a7422102d3eefdeb4ae9b6662_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3700
- 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:5916
- - 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\0000796A" 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:4980
  - - 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:2968
  - - 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:6076
  - - 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:1656
  - - 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:6020

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

0000796A

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000796A
Size 64KB
SHA256 0db326ce27ebe6ce0a66d6d399e1174634f72bb109c5536e0e0c3c8c5b3409b2
MD5 afd2cb85ebba885ce1141d8e9fbc721f
SHA1 cae0b082b61046e20c384a172910fc1393a7836a
SHA512 7630640028b5f46220bed9c725c932478d2613e60d090362caf739bc4ddfc78addf82d345632226f21e0d984d9dc3a4354f88dd15853e34842801357252c9360
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/ul:sLy2Kerc64CiGIm8so28l
TLSH
T16F535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 ecce3e1c69fd831e7b2f424e9f55eba2364fa00572904130ee39ea3430df4608
MD5 6272939a7422102d3eefdeb4ae9b6662
SHA1 958aff921de944a3cce20a01670fc2df8c2ae772
SHA512 d8d45764552653614366d18b098c413cc07dd25345f6a66256c4eaf606f7c21bf923313c89dae313b5d6dce30493612ffe29c03ea07fff798a1b0adb8fb1998d
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uu:sLy2Kerc64CiGIm8so28u
TLSH
T114536C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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