juko | 48b6008fd914c99e98fe843cac741a776dfda3978a01bf8acf88b119f5c253c5

General

Target
2026-08-08_ee0675a8d1f49206583844a8816c1ca7_elex_wannacry.exe
Size 50KB
Sample260808-klc6esck3x
SHA256 48b6008fd914c99e98fe843cac741a776dfda3978a01bf8acf88b119f5c253c5
MD5 ee0675a8d1f49206583844a8816c1ca7
SHA1 bfe19bc658d60c980598d3cf987cc91a275bfe07
SHA512 b3f079b8cdb91b91145b97e0f96fe478ce9c5151dc83dfc1c7a7decbfebe6f9a7a85c2f23432fce816fea891a7cf745a5a037bf1a36ee53552e4f74de18dc983
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILOY:tLsF2Kerc64sTiX2IV0DpL8SE9nYOY
TLSH
T11B33291A3B41E1D1C4A351B0EC5B4F74983AEDB58E276103BB85B70D1CB2A52CF3298E
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/0x000d00000001c645-4.dat	family_juko
behavioral2/files/0x000e00000001c646-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4248	WINWORD.exe
2980	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-1-5-21-1738198120-2966725515-3980530802-1000\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
4352	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	2026-08-08_ee0675a8d1f49206583844a8816c1ca7_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
1476	PING.EXE
2196	PING.EXE
1244	PING.EXE
4352	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1476	PING.EXE
2196	PING.EXE
1244	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5564 wrote to memory of 4248	5564	2026-08-08_ee0675a8d1f49206583844a8816c1ca7_elex_wannacry.exe	88
PID 4248 wrote to memory of 4352	4248	WINWORD.exe	89
PID 4352 wrote to memory of 1476	4352	cmd.exe	91
PID 4352 wrote to memory of 2196	4352	cmd.exe	92
PID 4352 wrote to memory of 1244	4352	cmd.exe	93
PID 4352 wrote to memory of 2980	4352	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-08-08_ee0675a8d1f49206583844a8816c1ca7_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-08_ee0675a8d1f49206583844a8816c1ca7_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5564
- 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:4248
- - 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\0000580D" 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:4352
  - - 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:2196
  - - 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:1244
  - - 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:2980

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

0000580D

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000580D
Size 50KB
SHA256 9f57ea41a9aae155343e8a8984c53023552842243cb2520a78cc996c0e7a57de
MD5 63204e4c749a0222297782fd6654e49b
SHA1 2d64e7b073f28974141e96e765884c0fa83a603f
SHA512 0d353f7a5f30311d483780ee64087978c2c33f159b1d45b3fce8807f287d767def2cd74ae9753e507df40f278de7d67875f41303f8f8470b77217491261e3da7
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILO4:tLsF2Kerc64sTiX2IV0DpL8SE9nYO4
TLSH
T12D33291A3B41E1D1C4A351B0EC5B4F74983AEDB58E276103BB85B70D1CB2A52CF3298E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 50KB
SHA256 48b6008fd914c99e98fe843cac741a776dfda3978a01bf8acf88b119f5c253c5
MD5 ee0675a8d1f49206583844a8816c1ca7
SHA1 bfe19bc658d60c980598d3cf987cc91a275bfe07
SHA512 b3f079b8cdb91b91145b97e0f96fe478ce9c5151dc83dfc1c7a7decbfebe6f9a7a85c2f23432fce816fea891a7cf745a5a037bf1a36ee53552e4f74de18dc983
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILOY:tLsF2Kerc64sTiX2IV0DpL8SE9nYOY
TLSH
T11B33291A3B41E1D1C4A351B0EC5B4F74983AEDB58E276103BB85B70D1CB2A52CF3298E
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