juko | 0170a4d18648a21ea800ffe5f2c5f046f7aef82a51e70d16e8b792ab0b43e110

General

Target
2026-11-01_b1d9d1adf7767a8f8179aace6cddbf90_elex_wannacry.exe
Size 32KB
Sample261102-nkrh7seh32
SHA256 0170a4d18648a21ea800ffe5f2c5f046f7aef82a51e70d16e8b792ab0b43e110
MD5 b1d9d1adf7767a8f8179aace6cddbf90
SHA1 115d4cf05049f5e70ef0e7ab8fc8e7524d885fa6
SHA512 ec7a076f2e2b8bd69d007b69df5ed8f96fb52a459a75653e2ebb67b6d4c0085e7e5804a0867e2891bcf0e717da236c931b1ce72cb910c1ba03daa780eae237c8
SSDEEP 768:JZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqwmNPWQHXF:TLsF2Kerc64sTiX2IV0DgsF
TLSH
T123E2292B6AA17052C59320F0F9591F34C43D9DB9016BB0A2F7457B6928B2D63CF71ACE
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
behavioral2/files/0x000d00000001b869-3.dat	family_juko
behavioral2/files/0x000e00000001c4ef-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5144	WINWORD.exe
3960	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-1-5-21-4154726816-2055034831-2297277433-1000\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
1176	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	2026-11-01_b1d9d1adf7767a8f8179aace6cddbf90_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
2968	PING.EXE
1476	PING.EXE
2984	PING.EXE
1176	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1476	PING.EXE
2984	PING.EXE
2968	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4184 wrote to memory of 5144	4184	2026-11-01_b1d9d1adf7767a8f8179aace6cddbf90_elex_wannacry.exe	89
PID 5144 wrote to memory of 1176	5144	WINWORD.exe	90
PID 1176 wrote to memory of 2968	1176	cmd.exe	92
PID 1176 wrote to memory of 1476	1176	cmd.exe	93
PID 1176 wrote to memory of 2984	1176	cmd.exe	94
PID 1176 wrote to memory of 3960	1176	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-11-01_b1d9d1adf7767a8f8179aace6cddbf90_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-01_b1d9d1adf7767a8f8179aace6cddbf90_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4184
- C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
  "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" -r
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5144
- - 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\00001161" 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:1176
  - - 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:2968
  - - 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:1476
  - - 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:2984
  - - 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:3960

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

Remote System Discovery

1

T1018

System Information Discovery

1

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

00001161

Path C:\Users\Admin\AppData\Roaming\Mozilla\00001161
Size 32KB
SHA256 ef166a9fb5cde061f4f266615969c671fa165c5642e6f62d861b33818d048c5a
MD5 67581a696aa566487e5a62144e970857
SHA1 3861dd9e0a602897e4e72256b1c144c0b9498d9d
SHA512 671f8e9e3b11aa00b4aeec6468e3606bb5a85d8b828cd65e5b95d5e50f1a30e76db836a9cd3791e4292e55a02c5c0405e9a268d9b450e8fa527f460ae995fe63
SSDEEP 768:JZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqwmNPWQHXS:TLsF2Kerc64sTiX2IV0DgsS
TLSH
T173E2192B6AA17052C59320F0F9591F34C43D9DB9016BB0A2F7457B6928B2D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 0170a4d18648a21ea800ffe5f2c5f046f7aef82a51e70d16e8b792ab0b43e110
MD5 b1d9d1adf7767a8f8179aace6cddbf90
SHA1 115d4cf05049f5e70ef0e7ab8fc8e7524d885fa6
SHA512 ec7a076f2e2b8bd69d007b69df5ed8f96fb52a459a75653e2ebb67b6d4c0085e7e5804a0867e2891bcf0e717da236c931b1ce72cb910c1ba03daa780eae237c8
SSDEEP 768:JZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqwmNPWQHXF:TLsF2Kerc64sTiX2IV0DgsF
TLSH
T123E2292B6AA17052C59320F0F9591F34C43D9DB9016BB0A2F7457B6928B2D63CF71ACE
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