juko | d22582868258a2798a7cc21d1d837f5e5432e9b9144fa9e76a7a1fc195d0aa17

General

Target
2026-05-29_3b2c7452ec771244b126cdf438ad494e_elex_wannacry.exe
Size 64KB
Sample260529-g7gtyset3w
SHA256 d22582868258a2798a7cc21d1d837f5e5432e9b9144fa9e76a7a1fc195d0aa17
MD5 3b2c7452ec771244b126cdf438ad494e
SHA1 635cc01cd053ad3cd6c9be778f73e3c41ba5eda8
SHA512 f5393ddd912790b8e1d54b717bde22d947f6c3c1adfbc6d2079a80f68345334b829ed88a06784e79887f7f8b4af066111a052ca2baf819a2a509ad338bfd795b
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/up:sLy2Kerc64CiGIm8so28p
TLSH
T113535C2AA5A220F8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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/0x0016000000025ad8-4.dat	family_juko
behavioral2/files/0x001b00000002b4c0-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4804	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-1-5-21-2746394149-3500112804-1243524366-1000\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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-29_3b2c7452ec771244b126cdf438ad494e_elex_wannacry.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
5024	cmd.exe
3796	PING.EXE
5892	PING.EXE
4880	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3796	PING.EXE
5892	PING.EXE
4880	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2708 wrote to memory of 4804	2708	2026-05-29_3b2c7452ec771244b126cdf438ad494e_elex_wannacry.exe	79
PID 4804 wrote to memory of 5024	4804	WINWORD.exe	80
PID 5024 wrote to memory of 3796	5024	cmd.exe	82
PID 5024 wrote to memory of 5892	5024	cmd.exe	83
PID 5024 wrote to memory of 4880	5024	cmd.exe	84
PID 5024 wrote to memory of 6020	5024	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\2026-05-29_3b2c7452ec771244b126cdf438ad494e_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-29_3b2c7452ec771244b126cdf438ad494e_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2708
- 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:4804
- - 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\00007614" 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:5024
  - - 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:3796
  - - 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:5892
  - - 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:4880
  - - 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

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Downloads

00007614

Path C:\Users\Admin\AppData\Roaming\Mozilla\00007614
Size 64KB
SHA256 2e502f7ed6d7d82d9fe26400941ccb8ada849dee3acf5c7a388150bbe285160f
MD5 d4002b6cfdfe5fcfe6980a8704f6b232
SHA1 b0bc4cc13785220557e2f83c845b968814953201
SHA512 3cedbe72e31a39a83bcc5d6138064e20518f3ed46db34316e6cc70cd79878e68908271e4dc580e84f85a6d81f0b5d2a29c2da7943da5a2aa1d02a4d4d2820119
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/u8:sLy2Kerc64CiGIm8so288
TLSH
T10F535C2AA5A220F8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 d22582868258a2798a7cc21d1d837f5e5432e9b9144fa9e76a7a1fc195d0aa17
MD5 3b2c7452ec771244b126cdf438ad494e
SHA1 635cc01cd053ad3cd6c9be778f73e3c41ba5eda8
SHA512 f5393ddd912790b8e1d54b717bde22d947f6c3c1adfbc6d2079a80f68345334b829ed88a06784e79887f7f8b4af066111a052ca2baf819a2a509ad338bfd795b
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/up:sLy2Kerc64CiGIm8so28p
TLSH
T113535C2AA5A220F8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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