juko | 9addcf8a69ac4a324ca0297ab497a07b67197794a806533e20fdb3124052a9cc

General

Target
2026-04-16_109eeeda21fbc8e9fb23e46c3559fdcc_elex_wannacry.exe
Size 30KB
Sample260416-qbf28af18m
SHA256 9addcf8a69ac4a324ca0297ab497a07b67197794a806533e20fdb3124052a9cc
MD5 109eeeda21fbc8e9fb23e46c3559fdcc
SHA1 69dbab3f2965aa7ae87cf85347bd7c44c99244e8
SHA512 b6757c0ff2f69588a360504e5d7119e003332b2a12b3a43c9a329a73292b6efe853d4ade8cc8a9db99bb1206b407f6c9d4c3835622f038a76c398888cb3754dc
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqjNPWQHrm:OLsF2Kerc64sTiX2IV0D8Mm
TLSH
T106E27D2E3EA28053C5D301F0E9A91F78C97E913B2539A05BCF400D492CF1D65DAB1E8E
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/0x001b00000002a117-4.dat	family_juko
behavioral2/files/0x001b00000002b39d-9.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5252	WINWORD.exe
488	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-1-5-21-1456842261-3464001825-2855069093-1000\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	2026-04-16_109eeeda21fbc8e9fb23e46c3559fdcc_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
4956	PING.EXE
4964	PING.EXE
1084	cmd.exe
4876	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4876	PING.EXE
4956	PING.EXE
4964	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5004 wrote to memory of 5252	5004	2026-04-16_109eeeda21fbc8e9fb23e46c3559fdcc_elex_wannacry.exe	79
PID 5252 wrote to memory of 1084	5252	WINWORD.exe	80
PID 1084 wrote to memory of 4876	1084	cmd.exe	82
PID 1084 wrote to memory of 4956	1084	cmd.exe	83
PID 1084 wrote to memory of 4964	1084	cmd.exe	84
PID 1084 wrote to memory of 488	1084	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\2026-04-16_109eeeda21fbc8e9fb23e46c3559fdcc_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-16_109eeeda21fbc8e9fb23e46c3559fdcc_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5004
- 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:5252
- - 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\000029BB" 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:1084
  - - 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:4876
  - - 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:4956
  - - 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:4964
  - - 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:488

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

000029BB

Path C:\Users\Admin\AppData\Roaming\Mozilla\000029BB
Size 30KB
SHA256 1be84e753dd588137ebd3cd65bf8a65dd1acd6bda5339cd8d59806718dc4e658
MD5 e0c707104105546e580b9d890625805c
SHA1 fbdcc18af908f719a74453a481e50b25430c9748
SHA512 fdee377666388d9c79263cfb1348ac436b7d7a5b40686da715ef9e03f035c786df9947f0bee92e378e415bd5d271815f80358ce210fe04631763eba0090dbaf0
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqjNPWQHrl:OLsF2Kerc64sTiX2IV0D8Ml
TLSH
T14BE27D2E3EA28053C5D301F0E9A91F78C97E953B2539A05BCF400D492CF1D65DAB1E8E
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 30KB
SHA256 9addcf8a69ac4a324ca0297ab497a07b67197794a806533e20fdb3124052a9cc
MD5 109eeeda21fbc8e9fb23e46c3559fdcc
SHA1 69dbab3f2965aa7ae87cf85347bd7c44c99244e8
SHA512 b6757c0ff2f69588a360504e5d7119e003332b2a12b3a43c9a329a73292b6efe853d4ade8cc8a9db99bb1206b407f6c9d4c3835622f038a76c398888cb3754dc
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqjNPWQHrm:OLsF2Kerc64sTiX2IV0D8Mm
TLSH
T106E27D2E3EA28053C5D301F0E9A91F78C97E913B2539A05BCF400D492CF1D65DAB1E8E
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