juko | 57bd4138961dfbae0d1dccde87b15608f1fb50fa8d08a1b374cc57d7a62c24e3

General

Target
2026-07-01_2028b2b3ef58842f6704ef0932c045c9_elex_wannacry.exe
Size 30KB
Sample260701-pdgwvsdw2k
SHA256 57bd4138961dfbae0d1dccde87b15608f1fb50fa8d08a1b374cc57d7a62c24e3
MD5 2028b2b3ef58842f6704ef0932c045c9
SHA1 fef1b66e7e854738561a970f91429ac83ee6be9e
SHA512 1b14931f2e3f5868ddf31ff499bc7e63725e061d75f7cdeef673d14be2921e8feef9225bd564938fcf4b3ca8ca6a975c06aad5de33c8fe5382d7d7a312d1af4a
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqkkzNPWQHrD:OLsF2Kerc64sTiX2IV0DkFMD
TLSH
T1C5E27D2E3EA28053C5D700F0E9A92F78C97E953B2569A05BCB400D4D3CF1D65DAB1E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery 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/0x0011000000006912-4.dat	family_juko
behavioral2/files/0x0009000000016d03-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5316	WINWORD.exe
3456	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-1-5-21-3047816590-610495838-277027736-1000\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

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	2026-07-01_2028b2b3ef58842f6704ef0932c045c9_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
832	cmd.exe
2752	PING.EXE
1152	PING.EXE
2268	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2752	PING.EXE
1152	PING.EXE
2268	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1040 wrote to memory of 5316	1040	2026-07-01_2028b2b3ef58842f6704ef0932c045c9_elex_wannacry.exe	88
PID 5316 wrote to memory of 832	5316	WINWORD.exe	89
PID 832 wrote to memory of 2752	832	cmd.exe	91
PID 832 wrote to memory of 1152	832	cmd.exe	92
PID 832 wrote to memory of 2268	832	cmd.exe	93
PID 832 wrote to memory of 3456	832	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-07-01_2028b2b3ef58842f6704ef0932c045c9_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-01_2028b2b3ef58842f6704ef0932c045c9_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1040
- 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:5316
- - 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\000065BA" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:832
  - - 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:2752
  - - 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:1152
  - - 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:2268
  - - 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:3456

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

000065BA

Path C:\Users\Admin\AppData\Roaming\Mozilla\000065BA
Size 30KB
SHA256 0cf5ca998295e3cde7daf04252fa16c73c1917c19cab3e1a040a521e9665efed
MD5 ba4c50b6d87078543f115f9273b36d58
SHA1 b8e4468a87ee4f963f3d8a3d40be0e4031f18d4c
SHA512 646e50cb0850e3ca940c23ae937ea45150338338cf7d63f7db9a62bef3745708487af9e8ff7f226ff453beb00799183b5f1800b01b2674e349dbca01e18b3bec
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqkkzNPWQHrd:OLsF2Kerc64sTiX2IV0DkFMd
TLSH
T1A4E27D2E3EA28053C5D700F0E9A91F78C97E953B2569A05BCB400D4D3CF1D65DAB1E9E
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 30KB
SHA256 57bd4138961dfbae0d1dccde87b15608f1fb50fa8d08a1b374cc57d7a62c24e3
MD5 2028b2b3ef58842f6704ef0932c045c9
SHA1 fef1b66e7e854738561a970f91429ac83ee6be9e
SHA512 1b14931f2e3f5868ddf31ff499bc7e63725e061d75f7cdeef673d14be2921e8feef9225bd564938fcf4b3ca8ca6a975c06aad5de33c8fe5382d7d7a312d1af4a
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqkkzNPWQHrD:OLsF2Kerc64sTiX2IV0DkFMD
TLSH
T1C5E27D2E3EA28053C5D700F0E9A92F78C97E953B2569A05BCB400D4D3CF1D65DAB1E9E
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