juko | aa19683be1ff43df16e52e18fcb42fd51febf91cc982b24148f15759ea300e8f

General

Target
2026-06-04_283d957e67f51cf9f245186b9b99d9e2_elex_wannacry.exe
Size 88KB
Sample260604-kdmpwsbt71
SHA256 aa19683be1ff43df16e52e18fcb42fd51febf91cc982b24148f15759ea300e8f
MD5 283d957e67f51cf9f245186b9b99d9e2
SHA1 cabe491eb2d22ab4f84b061a8e02c09b532c7618
SHA512 3c07206bcfd768c85e000be6b69105b00582e19eabf222ad15b7ff7175f1208e391f7256a263b006948c560c8acd2064d26e9434aaaa4a8393e115f66d07184b
SSDEEP 1536:5LsF2Kerc64sTiX2IV0DVk2Lbuzc/9yH8Ky9193jiT5l364KlVk937tgrd:5Ly2Kerc64CiGImRRLyzc/9yH8Ka1931
TLSH
T192934A8F73251205D9770979A2052F19AC3DADE78357A04CA7C4B1693833D3ACB3F6A9
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/0x001f0000000004a9-4.dat	family_juko
behavioral2/files/0x002b00000002b2db-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3044	WINWORD.exe
3148	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-1-5-21-1679180529-4058988202-686829476-1000\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	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	2026-06-04_283d957e67f51cf9f245186b9b99d9e2_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

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
4864	cmd.exe
5100	PING.EXE
4996	PING.EXE
4792	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5100	PING.EXE
4996	PING.EXE
4792	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1824 wrote to memory of 3044	1824	2026-06-04_283d957e67f51cf9f245186b9b99d9e2_elex_wannacry.exe	80
PID 3044 wrote to memory of 4864	3044	WINWORD.exe	81
PID 4864 wrote to memory of 5100	4864	cmd.exe	83
PID 4864 wrote to memory of 4996	4864	cmd.exe	84
PID 4864 wrote to memory of 4792	4864	cmd.exe	85
PID 4864 wrote to memory of 3148	4864	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-06-04_283d957e67f51cf9f245186b9b99d9e2_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-04_283d957e67f51cf9f245186b9b99d9e2_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1824
- 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:3044
- - 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\000052DE" 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:4864
  - - 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:5100
  - - 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:4996
  - - 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:4792
  - - 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:3148

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

000052DE

Path C:\Users\Admin\AppData\Roaming\Mozilla\000052DE
Size 88KB
SHA256 ca26e0d90d69337085850e45e55787079cf8748ca9ebff6a27782e966299fce4
MD5 880081be250ca7fa4e7e9dbfb0081c15
SHA1 90137aef89fe2149e81344cd2562416704a8a2d0
SHA512 c2287e28e1bbc1a96056cc29f4df28cd12c80866de54df9f27ded27b6d95da5cfbd6a15f8ad5206b198145a1e4598afef4a9707a18acda5dbbb62b4c267e891a
SSDEEP 1536:5LsF2Kerc64sTiX2IV0DVk2Lbuzc/9yH8Ky9193jiT5l364KlVk937tgrG:5Ly2Kerc64CiGImRRLyzc/9yH8Ka193O
TLSH
T108934A8F73251205D9770979A2052F19AC3DADE78357A04CA7C4B1693833D3ACB3F6A9
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 88KB
SHA256 aa19683be1ff43df16e52e18fcb42fd51febf91cc982b24148f15759ea300e8f
MD5 283d957e67f51cf9f245186b9b99d9e2
SHA1 cabe491eb2d22ab4f84b061a8e02c09b532c7618
SHA512 3c07206bcfd768c85e000be6b69105b00582e19eabf222ad15b7ff7175f1208e391f7256a263b006948c560c8acd2064d26e9434aaaa4a8393e115f66d07184b
SSDEEP 1536:5LsF2Kerc64sTiX2IV0DVk2Lbuzc/9yH8Ky9193jiT5l364KlVk937tgrd:5Ly2Kerc64CiGImRRLyzc/9yH8Ka1931
TLSH
T192934A8F73251205D9770979A2052F19AC3DADE78357A04CA7C4B1693833D3ACB3F6A9
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