juko | 9addcf8a69ac4a324ca0297ab497a07b67197794a806533e20fdb3124052a9cc

General

Target
2026-04-16_109eeeda21fbc8e9fb23e46c3559fdcc_elex_wannacry.exe
Size 30KB
Sample260416-qbf28af18m
SHA256 9addcf8a69ac4a324ca0297ab497a07b67197794a806533e20fdb3124052a9cc
MD5 109eeeda21fbc8e9fb23e46c3559fdcc
SHA1 69dbab3f2965aa7ae87cf85347bd7c44c99244e8
SHA512 b6757c0ff2f69588a360504e5d7119e003332b2a12b3a43c9a329a73292b6efe853d4ade8cc8a9db99bb1206b407f6c9d4c3835622f038a76c398888cb3754dc
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqjNPWQHrm:OLsF2Kerc64sTiX2IV0D8Mm
TLSH
T106E27D2E3EA28053C5D301F0E9A91F78C97E913B2539A05BCF400D492CF1D65DAB1E8E
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
behavioral1/files/0x0006000000023076-4.dat	family_juko
behavioral1/files/0x0009000000024480-9.dat	family_juko

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-721190819-434563495-2007910846-1000\Control Panel\International\Geo\Nation	2026-04-16_109eeeda21fbc8e9fb23e46c3559fdcc_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-721190819-434563495-2007910846-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
4684	WINWORD.exe
2120	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-1-5-21-721190819-434563495-2007910846-1000\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	2026-04-16_109eeeda21fbc8e9fb23e46c3559fdcc_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
5444	PING.EXE
5604	cmd.exe
1968	PING.EXE
4160	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1968	PING.EXE
4160	PING.EXE
5444	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2044 wrote to memory of 4684	2044	2026-04-16_109eeeda21fbc8e9fb23e46c3559fdcc_elex_wannacry.exe	84
PID 4684 wrote to memory of 5604	4684	WINWORD.exe	85
PID 5604 wrote to memory of 1968	5604	cmd.exe	87
PID 5604 wrote to memory of 4160	5604	cmd.exe	88
PID 5604 wrote to memory of 5444	5604	cmd.exe	89
PID 5604 wrote to memory of 2120	5604	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\2026-04-16_109eeeda21fbc8e9fb23e46c3559fdcc_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-16_109eeeda21fbc8e9fb23e46c3559fdcc_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2044
- C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
  "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" -r
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4684
- - 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\000043F6" 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:5604
  - - 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:1968
  - - 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:4160
  - - 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:5444
  - - 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:2120

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

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

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

000043F6

Path C:\Users\Admin\AppData\Roaming\Mozilla\000043F6
Size 30KB
SHA256 04c84a4966be1476d2b5ba412b802b29221ddb83090b3732a69f823c8dcb6524
MD5 38e03680a90ea71548f96de0c76a2144
SHA1 e8660f5e8f5a9b984e8e258ef7dc2ec3bafef356
SHA512 90771c16f29419a7eb5b9408e91c591be12ba3186e265b2f6b4a73328300e7c69b4958cef8ece7f2492a5e79d91edd5aca250b443ab944d04acfafafdd13a87b
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqjNPWQHr7:OLsF2Kerc64sTiX2IV0D8M7
TLSH
T1F4E27D2E3EA28053C5D301F0E9A91F78C97E913B2539A05BCF400D492CF1D65DAB1E8E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 30KB
SHA256 9addcf8a69ac4a324ca0297ab497a07b67197794a806533e20fdb3124052a9cc
MD5 109eeeda21fbc8e9fb23e46c3559fdcc
SHA1 69dbab3f2965aa7ae87cf85347bd7c44c99244e8
SHA512 b6757c0ff2f69588a360504e5d7119e003332b2a12b3a43c9a329a73292b6efe853d4ade8cc8a9db99bb1206b407f6c9d4c3835622f038a76c398888cb3754dc
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqjNPWQHrm:OLsF2Kerc64sTiX2IV0D8Mm
TLSH
T106E27D2E3EA28053C5D301F0E9A91F78C97E913B2539A05BCF400D492CF1D65DAB1E8E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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