juko | fa0e88d3ecfa9aa478932bf75236c5a3fbb1a442bb8de860fd14fdfdecfeebaa

General

Target
2026-09-29_1e0777c096d8f53926742a69844bf2f8_elex_wannacry.exe
Size 47KB
Sample260930-3b3mfawdmc
SHA256 fa0e88d3ecfa9aa478932bf75236c5a3fbb1a442bb8de860fd14fdfdecfeebaa
MD5 1e0777c096d8f53926742a69844bf2f8
SHA1 30f0a1831f3d5c82d09fcbb586a3505075b060a7
SHA512 f872b83bd87e3ad5805934792c62fcd48c6960e3732ae4dd789531e240cf9b0f7c30eb9d4795b3535c75c2167736abe0377a0b20e7ae7307fc0ba7543eda9686
SSDEEP 768:tyZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqZNPWQHmgyFIvA0vqxet2dMINJf:t2LsF2Kerc64sTiX2IV0DOlgy6vlvqxt
TLSH
T148235B173EA520C1D6D610B0EAA90F78843DEDB50127A152F780B65D2CB6E62DF71ECE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution 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/0x00070000000004ec-4.dat	family_juko
behavioral1/files/0x0004000000022bcc-12.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-1-5-21-1696934516-3600988056-1840298893-1000\Control Panel\International\Geo\Nation	2026-09-29_1e0777c096d8f53926742a69844bf2f8_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1696934516-3600988056-1840298893-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
4072	WINWORD.exe
3232	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-1-5-21-1696934516-3600988056-1840298893-1000\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

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
1824	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	WINWORD.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	WINWORD.exe

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	2026-09-29_1e0777c096d8f53926742a69844bf2f8_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
1824	cmd.exe
4660	PING.EXE
3464	PING.EXE
4492	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4660	PING.EXE
3464	PING.EXE
4492	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4724 wrote to memory of 4072	4724	2026-09-29_1e0777c096d8f53926742a69844bf2f8_elex_wannacry.exe	90
PID 4072 wrote to memory of 1824	4072	WINWORD.exe	91
PID 1824 wrote to memory of 4660	1824	cmd.exe	93
PID 1824 wrote to memory of 3464	1824	cmd.exe	96
PID 1824 wrote to memory of 4492	1824	cmd.exe	99
PID 1824 wrote to memory of 3232	1824	cmd.exe	100

C:\Users\Admin\AppData\Local\Temp\2026-09-29_1e0777c096d8f53926742a69844bf2f8_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-29_1e0777c096d8f53926742a69844bf2f8_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:4072
- - 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\00002819" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:1824
  - - 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:4660
  - - 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:3464
  - - 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:4492
  - - 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
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      PID:3232

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

2

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

00002819

Path C:\Users\Admin\AppData\Roaming\Mozilla\00002819
Size 47KB
SHA256 962d1e4028fbde81544d0f158229dac8756bfb9c3f8db098d82939cec9ad39a5
MD5 9215f3b60ed9a53efc279b4318a94593
SHA1 a82a63b4ea19a8d5a80b2ec73b1e4481958c7e77
SHA512 a8938c1be60668ef2ce0eac7541feef28c15dcea8c49f3dff21658bba45a1c230cd77f78934ae715664e4dca85151591feb1cd8571f6647571fb119898b556fc
SSDEEP 768:tyZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqZNPWQHmgyFIvA0vqxet2dMINJc:t2LsF2Kerc64sTiX2IV0DOlgy6vlvqxa
TLSH
T154235B173EA520C1D6D610B0EAA90F78843DEDB50127A152F780B65D2CB6E62DF71ECE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 47KB
SHA256 fa0e88d3ecfa9aa478932bf75236c5a3fbb1a442bb8de860fd14fdfdecfeebaa
MD5 1e0777c096d8f53926742a69844bf2f8
SHA1 30f0a1831f3d5c82d09fcbb586a3505075b060a7
SHA512 f872b83bd87e3ad5805934792c62fcd48c6960e3732ae4dd789531e240cf9b0f7c30eb9d4795b3535c75c2167736abe0377a0b20e7ae7307fc0ba7543eda9686
SSDEEP 768:tyZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqZNPWQHmgyFIvA0vqxet2dMINJf:t2LsF2Kerc64sTiX2IV0DOlgy6vlvqxt
TLSH
T148235B173EA520C1D6D610B0EAA90F78843DEDB50127A152F780B65D2CB6E62DF71ECE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads