juko | f3458eea402e044efe60a7a7c5d8e4b15d193aecb6cafbb216275115c0c4ddd1

General

Target
2026-07-04_103bc2babbf88a15c5514f857171d5fb_elex_wannacry.exe
Size 30KB
Sample260704-e2qhssa16w
SHA256 f3458eea402e044efe60a7a7c5d8e4b15d193aecb6cafbb216275115c0c4ddd1
MD5 103bc2babbf88a15c5514f857171d5fb
SHA1 ccb4b09f6ea8e86e091900bf2e36737162e68dd7
SHA512 c4af70e0d36815c088cac0b7546eef42fae586c8e18149042e11b6c850d5e24d0da52e8ed3de7d44adec8f52559e1d1b8af83c475f2e26739340f73ae3618c0c
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXM:tLsF2Kerc64sTiX2IV0DzloM
TLSH
T1D8E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
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/0x000700000001b85a-4.dat	family_juko
behavioral2/files/0x000d00000001c644-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2576	WINWORD.exe
1584	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-1-5-21-2132828192-1552876075-2324613956-1000\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	2026-07-04_103bc2babbf88a15c5514f857171d5fb_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

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
5340	cmd.exe
5612	PING.EXE
700	PING.EXE
5928	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5612	PING.EXE
700	PING.EXE
5928	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2724 wrote to memory of 2576	2724	2026-07-04_103bc2babbf88a15c5514f857171d5fb_elex_wannacry.exe	88
PID 2576 wrote to memory of 5340	2576	WINWORD.exe	89
PID 5340 wrote to memory of 5612	5340	cmd.exe	91
PID 5340 wrote to memory of 700	5340	cmd.exe	92
PID 5340 wrote to memory of 5928	5340	cmd.exe	93
PID 5340 wrote to memory of 1584	5340	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-07-04_103bc2babbf88a15c5514f857171d5fb_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-04_103bc2babbf88a15c5514f857171d5fb_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2724
- 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:2576
- - 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\00000AA3" 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:5340
  - - 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:5612
  - - 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:700
  - - 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:5928
  - - 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:1584

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

00000AA3

Path C:\Users\Admin\AppData\Roaming\Mozilla\00000AA3
Size 30KB
SHA256 6b910ddad6176a318c7bf83cad03504cbf54244f6f98e36cc1f4e9560bfc7586
MD5 343f8a55a2eac1b7201128af2f2ac127
SHA1 ffff3288f3f5a63bea50a23c5aaf83795bc75f17
SHA512 99f3cbd36b15948e681d864dd720e33709c011440e715f93f17fe6271e847fd93f0034887ced288ad0a8f0baeb53dd929777e0140c9cf79bfcdfc31511eaa800
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXa:tLsF2Kerc64sTiX2IV0Dzloa
TLSH
T122E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 30KB
SHA256 f3458eea402e044efe60a7a7c5d8e4b15d193aecb6cafbb216275115c0c4ddd1
MD5 103bc2babbf88a15c5514f857171d5fb
SHA1 ccb4b09f6ea8e86e091900bf2e36737162e68dd7
SHA512 c4af70e0d36815c088cac0b7546eef42fae586c8e18149042e11b6c850d5e24d0da52e8ed3de7d44adec8f52559e1d1b8af83c475f2e26739340f73ae3618c0c
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXM:tLsF2Kerc64sTiX2IV0DzloM
TLSH
T1D8E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
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