juko | 60749bf5948f517deeb5959a658e690b4a7d7ef9ddc1ce092516ec32c3e30683

General

Target
2026-05-06_2f04f9d47c785d44b063e88244b475e8_elex_wannacry.exe
Size 64KB
Sample260506-jdl8pagx4p
SHA256 60749bf5948f517deeb5959a658e690b4a7d7ef9ddc1ce092516ec32c3e30683
MD5 2f04f9d47c785d44b063e88244b475e8
SHA1 330fe3b472d3abd779cb4135690e55bc440d06a2
SHA512 06484dadfbe8aeec55722f012157d4b2ccadfaab72eaa1cd83fcdadd5a08c2d3899b78bf8d3b88fba3643ae3ab11b544ffdfd772bf1f6de48115d02f0033cf77
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/up:sLy2Kerc64CiGIm8so28p
TLSH
T1D4535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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/0x000b00000001f15c-4.dat	family_juko
behavioral1/files/0x00090000000243e9-14.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	2026-05-06_2f04f9d47c785d44b063e88244b475e8_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
3844	WINWORD.exe
4788	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	2026-05-06_2f04f9d47c785d44b063e88244b475e8_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
4820	PING.EXE
4680	PING.EXE
4760	PING.EXE
5228	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4820	PING.EXE
4680	PING.EXE
4760	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4724 wrote to memory of 3844	4724	2026-05-06_2f04f9d47c785d44b063e88244b475e8_elex_wannacry.exe	85
PID 3844 wrote to memory of 5228	3844	WINWORD.exe	86
PID 5228 wrote to memory of 4820	5228	cmd.exe	88
PID 5228 wrote to memory of 4680	5228	cmd.exe	89
PID 5228 wrote to memory of 4760	5228	cmd.exe	90
PID 5228 wrote to memory of 4788	5228	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\2026-05-06_2f04f9d47c785d44b063e88244b475e8_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-06_2f04f9d47c785d44b063e88244b475e8_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4724
- 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:3844
- - 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\00006419" 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:5228
  - - 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:4820
  - - 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:4680
  - - 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:4760
  - - 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:4788

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

00006419

Path C:\Users\Admin\AppData\Roaming\Mozilla\00006419
Size 64KB
SHA256 16af96ec240b0ae3ab0da56f9d211490f868f98e2708f5eaf98f5e13098e9688
MD5 7b6d5cbfd20f5e6179390334ee95b52e
SHA1 5ad211eb9c802f543ffbbf8b8e41a4aa68fc3c5b
SHA512 52393cdecf9eea1edbefbb2e13b8ec299c5572ab7a18fbd8d001de7883973bd33294af952fa619b1199504b9e81286b9fff4ed4d2f04a83dca4541681ba072a6
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/u8:sLy2Kerc64CiGIm8so288
TLSH
T1E8535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 60749bf5948f517deeb5959a658e690b4a7d7ef9ddc1ce092516ec32c3e30683
MD5 2f04f9d47c785d44b063e88244b475e8
SHA1 330fe3b472d3abd779cb4135690e55bc440d06a2
SHA512 06484dadfbe8aeec55722f012157d4b2ccadfaab72eaa1cd83fcdadd5a08c2d3899b78bf8d3b88fba3643ae3ab11b544ffdfd772bf1f6de48115d02f0033cf77
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/up:sLy2Kerc64CiGIm8so28p
TLSH
T1D4535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3844-13-0x0000000000590000-0x00000000005EF000-memory.dmp

Download

memory/4724-11-0x00000000025B0000-0x000000000260F000-memory.dmp

Download

memory/4788-16-0x00000000020B0000-0x000000000210F000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads