juko | ee01fd09ef0066990a2dfe5c11e36cc5412ba40df4e7eab2241ae85cb01f64d5

General

Target
2026-08-09_adab094ced05d207699b96e3e159de96_elex_wannacry.exe
Size 94KB
Sample260809-em75ashj61
SHA256 ee01fd09ef0066990a2dfe5c11e36cc5412ba40df4e7eab2241ae85cb01f64d5
MD5 adab094ced05d207699b96e3e159de96
SHA1 de7ad527734c746e31305908ba6800c6f43ca4e1
SHA512 57670d88fb85520574ed0325667feafb53df3a930fcf75dabd7d5977a89a9ed56e700de934da7b584c4845e732f8b98946c12e135c6d7cd214cf45015dd093aa
SSDEEP 1536:RLsF2Kerc64sTiX2IV0DxY8rqBLSaVl17oMvTbMvY4+oi9u6G6/N7:RLy2Kerc64CiGImFYgUBWTb4/N7
TLSH
T162937C2157A85153F0B246B0AD761B3098B97CB56AB3B21EBB03774D1871D21FF34B8A
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 8 IoCs

resource	yara_rule
behavioral1/memory/4448-0-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko
behavioral1/files/0x00130000000243ce-5.dat	family_juko
behavioral1/memory/724-13-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko
behavioral1/memory/4448-12-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko
behavioral1/memory/724-15-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko
behavioral1/files/0x00080000000244b0-16.dat	family_juko
behavioral1/memory/364-18-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko
behavioral1/memory/364-19-0x0000000000400000-0x000000000042B000-memory.dmp	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-1-5-21-668679576-120646659-2289335452-1000\Control Panel\International\Geo\Nation	2026-08-09_adab094ced05d207699b96e3e159de96_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-668679576-120646659-2289335452-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
724	WINWORD.exe
364	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-1-5-21-668679576-120646659-2289335452-1000\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
3460	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	2026-08-09_adab094ced05d207699b96e3e159de96_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
3460	cmd.exe
4820	PING.EXE
4296	PING.EXE
2312	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4820	PING.EXE
4296	PING.EXE
2312	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4448 wrote to memory of 724	4448	2026-08-09_adab094ced05d207699b96e3e159de96_elex_wannacry.exe	86
PID 724 wrote to memory of 3460	724	WINWORD.exe	87
PID 3460 wrote to memory of 4820	3460	cmd.exe	89
PID 3460 wrote to memory of 4296	3460	cmd.exe	92
PID 3460 wrote to memory of 2312	3460	cmd.exe	95
PID 3460 wrote to memory of 364	3460	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\2026-08-09_adab094ced05d207699b96e3e159de96_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-09_adab094ced05d207699b96e3e159de96_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4448
- 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:724
- - 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\000046EB" 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:3460
  - - 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:4296
  - - 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:2312
  - - 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:364

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

000046EB

Path C:\Users\Admin\AppData\Roaming\Mozilla\000046EB
Size 94KB
SHA256 1d7c0c453d34f21c4723bc3ffcae04c6199c6f9e906d53ae1c82346dea108d3a
MD5 b582754ba4cfd54f2fb0617a5f16966d
SHA1 aa7ed35b4b0a14e85538363c8d9b707ff55573be
SHA512 56334c64059da05746cc20421f0e1abff002e6691604154e405cfcbbeb23f7975c4232b6e8500f34b37e1231ddfdf44b4000bdb435eb62bfc7e27665493881d4
SSDEEP 1536:RLsF2Kerc64sTiX2IV0DxY8rqBLSaVl17oMvTbMvY4+oi9u6G6/Np:RLy2Kerc64CiGImFYgUBWTb4/Np
TLSH
T177937C2157A85153F0B246B0AD761B3098B97CB56AB3B21EBB03774D1871D21FF34B8A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 94KB
SHA256 ee01fd09ef0066990a2dfe5c11e36cc5412ba40df4e7eab2241ae85cb01f64d5
MD5 adab094ced05d207699b96e3e159de96
SHA1 de7ad527734c746e31305908ba6800c6f43ca4e1
SHA512 57670d88fb85520574ed0325667feafb53df3a930fcf75dabd7d5977a89a9ed56e700de934da7b584c4845e732f8b98946c12e135c6d7cd214cf45015dd093aa
SSDEEP 1536:RLsF2Kerc64sTiX2IV0DxY8rqBLSaVl17oMvTbMvY4+oi9u6G6/N7:RLy2Kerc64CiGImFYgUBWTb4/N7
TLSH
T162937C2157A85153F0B246B0AD761B3098B97CB56AB3B21EBB03774D1871D21FF34B8A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/364-18-0x0000000000400000-0x000000000042B000-memory.dmp

Download

memory/364-19-0x0000000000400000-0x000000000042B000-memory.dmp

Download

memory/724-13-0x0000000000400000-0x000000000042B000-memory.dmp

Download

memory/724-15-0x0000000000400000-0x000000000042B000-memory.dmp

Download

memory/4448-0-0x0000000000400000-0x000000000042B000-memory.dmp

Download

memory/4448-12-0x0000000000400000-0x000000000042B000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads