juko | 6ec7dd14afe0ee511f7719d2fe3537d77617563cb8ab5bb762452c98afc27568

General

Target
2026-08-08_719b56ae630bdb88f2fb47c12c60b20c_elex_wannacry.exe
Size 50KB
Sample260808-ks2glaxshw
SHA256 6ec7dd14afe0ee511f7719d2fe3537d77617563cb8ab5bb762452c98afc27568
MD5 719b56ae630bdb88f2fb47c12c60b20c
SHA1 d29a1ef39aea2a58a39ef378a298d3b532eac84a
SHA512 f1dafc0de2dd105ac17a9a2584a9c3a07efe10db0e518732b390a04ebfd7551e343c7697ebd6717e1d344e8fa7d51c1b5e6c2ac142898019c55f897af7822a8b
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILO6:tLsF2Kerc64sTiX2IV0DpL8SE9nYO6
TLSH
T1EB33291A3B41E1D1C4A351B0EC5B4F74983AEDB58E676103BB85B70D1CB2A52CF7298E
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/0x00200000000118e7-4.dat	family_juko
behavioral2/files/0x000e00000001c525-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4140	WINWORD.exe
1824	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-1-5-21-1014449518-1831897916-4205727055-1000\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
3296	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	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-08_719b56ae630bdb88f2fb47c12c60b20c_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

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
3296	cmd.exe
3396	PING.EXE
1900	PING.EXE
5080	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3396	PING.EXE
1900	PING.EXE
5080	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4632 wrote to memory of 4140	4632	2026-08-08_719b56ae630bdb88f2fb47c12c60b20c_elex_wannacry.exe	90
PID 4140 wrote to memory of 3296	4140	WINWORD.exe	91
PID 3296 wrote to memory of 3396	3296	cmd.exe	93
PID 3296 wrote to memory of 1900	3296	cmd.exe	94
PID 3296 wrote to memory of 5080	3296	cmd.exe	95
PID 3296 wrote to memory of 1824	3296	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\2026-08-08_719b56ae630bdb88f2fb47c12c60b20c_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-08_719b56ae630bdb88f2fb47c12c60b20c_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4632
- 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:4140
- - 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\0000233D" 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:3296
  - - 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:3396
  - - 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:1900
  - - 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:5080
  - - 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:1824

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

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

0000233D

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000233D
Size 50KB
SHA256 3497dc00e718bd5b883ab843d41b08eb44364d876b297ad78c25fd2b8b1a7680
MD5 a9fe5b2fe980ac225dc27ed1a65ba0ef
SHA1 e2442174c87e6176c41661995f5412c5cba34e23
SHA512 362d651e1954691934675584588eca4e097f6035e31eb92c87ba5aa6c4c1ca63a0a04e7774e8f2988e3cb5c30eb7caa7d66f6814642b0eefb2500f0be6081081
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILOZ:tLsF2Kerc64sTiX2IV0DpL8SE9nYOZ
TLSH
T1DC33291A3B41E1D1C4A351B0EC5B4F74983AEDB58E276103BB85B70D1CB2A52CF3298E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 50KB
SHA256 6ec7dd14afe0ee511f7719d2fe3537d77617563cb8ab5bb762452c98afc27568
MD5 719b56ae630bdb88f2fb47c12c60b20c
SHA1 d29a1ef39aea2a58a39ef378a298d3b532eac84a
SHA512 f1dafc0de2dd105ac17a9a2584a9c3a07efe10db0e518732b390a04ebfd7551e343c7697ebd6717e1d344e8fa7d51c1b5e6c2ac142898019c55f897af7822a8b
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILO6:tLsF2Kerc64sTiX2IV0DpL8SE9nYO6
TLSH
T1EB33291A3B41E1D1C4A351B0EC5B4F74983AEDB58E676103BB85B70D1CB2A52CF7298E
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