juko | a9182946b7e3c6dab025eb33678379144d3daae3ac6f8cbfaef5a0a1c86b758f

General

Target
2026-08-04_99babe0cad50bbe0004c83e9eabff45a_elex_wannacry.exe
Size 69KB
Sample260804-xtfbzafe66
SHA256 a9182946b7e3c6dab025eb33678379144d3daae3ac6f8cbfaef5a0a1c86b758f
MD5 99babe0cad50bbe0004c83e9eabff45a
SHA1 6398eabe8aeea98bb69b29c758a2ef38e387625a
SHA512 1b9ed1ca492c3f430727e5aa0a9cc026d74875f61e668352430bf49d335a16eb9a8f787935f1ed0e51c4bbb771167f4c5c51a7704d8188bd90f4e398a0635a4d
SSDEEP 1536:tLsF2Kerc64sTiX2IV0DpK8SE9nYOhoQ6YBwEM9U:tLy2Kerc64CiGIm1K851YOhqYBwEM9U
TLSH
T19D63F70737A4A1E1D0A35270E8660B649B37ECB19A73A3077B94771D1DB2A41CF31B9B
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/0x000900000001e42d-4.dat	family_juko
behavioral1/files/0x000d00000002446c-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-1-5-21-2370214745-1838013427-2987045292-1000\Control Panel\International\Geo\Nation	2026-08-04_99babe0cad50bbe0004c83e9eabff45a_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2370214745-1838013427-2987045292-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
5112	WINWORD.exe
1584	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-1-5-21-2370214745-1838013427-2987045292-1000\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
5048	cmd.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	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	2026-08-04_99babe0cad50bbe0004c83e9eabff45a_elex_wannacry.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
5048	cmd.exe
4812	PING.EXE
5084	PING.EXE
4744	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4812	PING.EXE
5084	PING.EXE
4744	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2216 wrote to memory of 5112	2216	2026-08-04_99babe0cad50bbe0004c83e9eabff45a_elex_wannacry.exe	85
PID 5112 wrote to memory of 5048	5112	WINWORD.exe	86
PID 5048 wrote to memory of 4812	5048	cmd.exe	88
PID 5048 wrote to memory of 5084	5048	cmd.exe	91
PID 5048 wrote to memory of 4744	5048	cmd.exe	94
PID 5048 wrote to memory of 1584	5048	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-04_99babe0cad50bbe0004c83e9eabff45a_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-04_99babe0cad50bbe0004c83e9eabff45a_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2216
- 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:5112
- - 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\00005E13" 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:5048
  - - 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:4812
  - - 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:5084
  - - 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:4744
  - - 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:1584

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

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

00005E13

Path C:\Users\Admin\AppData\Roaming\Mozilla\00005E13
Size 69KB
SHA256 5da15b0fdad8ea298e98733e9a74d1d6740760089b7fd284ff4126a2102e3d5f
MD5 b5a96aeee3ea8c2f487b5f234946e70a
SHA1 0dcadf504f45442a641e9e052ce217bea8620767
SHA512 8edab948bb8424b2dd5da2e4daf5c5e2ed440ea8fbeae86da4b2df30ffa31b65e3653cccad48aa1c87bed0197c2f5cc7d5b0d1f86608dbf455ff5115e60a5d3e
SSDEEP 1536:tLsF2Kerc64sTiX2IV0DpK8SE9nYOhoQ6YBwEM9e:tLy2Kerc64CiGIm1K851YOhqYBwEM9e
TLSH
T16C63F70737A4A1E1D0A35270E8660B649B37ECB19A73A2077B94771D1DB2A41CF31B9B
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 69KB
SHA256 a9182946b7e3c6dab025eb33678379144d3daae3ac6f8cbfaef5a0a1c86b758f
MD5 99babe0cad50bbe0004c83e9eabff45a
SHA1 6398eabe8aeea98bb69b29c758a2ef38e387625a
SHA512 1b9ed1ca492c3f430727e5aa0a9cc026d74875f61e668352430bf49d335a16eb9a8f787935f1ed0e51c4bbb771167f4c5c51a7704d8188bd90f4e398a0635a4d
SSDEEP 1536:tLsF2Kerc64sTiX2IV0DpK8SE9nYOhoQ6YBwEM9U:tLy2Kerc64CiGIm1K851YOhqYBwEM9U
TLSH
T19D63F70737A4A1E1D0A35270E8660B649B37ECB19A73A3077B94771D1DB2A41CF31B9B
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