juko | 6e0ad042c435c33f10dcd8fa9b88544ae33b587d71a1c264cc90e2723667530e

General

Target
2026-05-17_32899d94531aa47a9b85c568e736943b_elex_wannacry.exe
Size 32KB
Sample260517-jd367sdw81
SHA256 6e0ad042c435c33f10dcd8fa9b88544ae33b587d71a1c264cc90e2723667530e
MD5 32899d94531aa47a9b85c568e736943b
SHA1 5a77a8c4db8d748f626a14d9b715de729da13842
SHA512 44531a75eb23ac1c1883ba94473afe66d765e27277ce216face0a47a4fbba346572a6cd344c425a9727bc20cfad017a6884bf7b0cb0b3fdfca67749da2bc505e
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqXNPWQHbfC:tLsF2Kerc64sTiX2IV0DYQa
TLSH
T14AE23B2B6AA17052C59320F0F9591F34C43D9DB9116BB0A2F7417B6928B2D63CF71ACE
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/0x00180000000256ca-4.dat	family_juko
behavioral2/files/0x001b00000002b3aa-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4408	WINWORD.exe
4004	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-1-5-21-2824035265-2271499813-2042964211-1000\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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-17_32899d94531aa47a9b85c568e736943b_elex_wannacry.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
1748	cmd.exe
3440	PING.EXE
3272	PING.EXE
3224	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3440	PING.EXE
3272	PING.EXE
3224	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3880 wrote to memory of 4408	3880	2026-05-17_32899d94531aa47a9b85c568e736943b_elex_wannacry.exe	81
PID 4408 wrote to memory of 1748	4408	WINWORD.exe	82
PID 1748 wrote to memory of 3440	1748	cmd.exe	84
PID 1748 wrote to memory of 3272	1748	cmd.exe	85
PID 1748 wrote to memory of 3224	1748	cmd.exe	86
PID 1748 wrote to memory of 4004	1748	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\2026-05-17_32899d94531aa47a9b85c568e736943b_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-17_32899d94531aa47a9b85c568e736943b_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3880
- 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:4408
- - 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\00000C45" 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:1748
  - - 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:3440
  - - 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:3272
  - - 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:3224
  - - 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:4004

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

00000C45

Path C:\Users\Admin\AppData\Roaming\Mozilla\00000C45
Size 32KB
SHA256 6100a0a4fd3f978f5ecd45b2692b8a6eb4bfce2d7a00d4656f8551e96ea35d7b
MD5 a647c7f64ae766ca0a86d12f964d7e24
SHA1 655af54fbfeceefdf57299deabc8655efdcad201
SHA512 f93bd342eb8064acdeef226ad6aed66a169b61bd68288fc5cb6b5e1ae41067f25c89dd77abf278f3161cef829c346ec562229254f22e8017058cd5d052f51a50
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqXNPWQHbfz:tLsF2Kerc64sTiX2IV0DYQb
TLSH
T1D3E23B2B6AA17052C59320F0F9591F34C43D9DB9116BB0A2F7417B6928B2D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 6e0ad042c435c33f10dcd8fa9b88544ae33b587d71a1c264cc90e2723667530e
MD5 32899d94531aa47a9b85c568e736943b
SHA1 5a77a8c4db8d748f626a14d9b715de729da13842
SHA512 44531a75eb23ac1c1883ba94473afe66d765e27277ce216face0a47a4fbba346572a6cd344c425a9727bc20cfad017a6884bf7b0cb0b3fdfca67749da2bc505e
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqXNPWQHbfC:tLsF2Kerc64sTiX2IV0DYQa
TLSH
T14AE23B2B6AA17052C59320F0F9591F34C43D9DB9116BB0A2F7417B6928B2D63CF71ACE
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