juko | 97ba9912f20485bde6873282d57c594898a3e49768d9450a004bc0872b0f1d4f

General

Target
2026-07-14_d23f8f1c514e60dde321f221dcff25e7_elex_wannacry.exe
Size 87KB
Sample260714-ys3ljsft2z
SHA256 97ba9912f20485bde6873282d57c594898a3e49768d9450a004bc0872b0f1d4f
MD5 d23f8f1c514e60dde321f221dcff25e7
SHA1 503ac9f3186ad4e35510a3a051c83092f7818acb
SHA512 26d0d2b41555cb19273a27455a88d22c73bd1da48b71c96d2f354278653e9449fcc4e9c0fbb4df27ac1c2dec51df72ff68822f9b03e88fdc757065d62bec9ace
SSDEEP 1536:2LsF2Kerc64sTiX2IV0DpK8SE9nYOzmEQkwpf:2Ly2Kerc64CiGIm1K851YO6EQkwpf
TLSH
T11F93A1763A259190C48BD178E8155AA0B932DCF52FF71303E6417AAC59B1E13CFAE8C6
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 7 IoCs

resource	yara_rule
behavioral2/memory/5332-0-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/files/0x000f00000001c57f-5.dat	family_juko
behavioral2/memory/5332-9-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/memory/1156-12-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/files/0x000e00000001c580-13.dat	family_juko
behavioral2/memory/5000-15-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/memory/5000-16-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
1156	WINWORD.exe
5000	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-1-5-21-2301830172-776172150-2531349243-1000\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	2026-07-14_d23f8f1c514e60dde321f221dcff25e7_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
5304	PING.EXE
2548	PING.EXE
2956	cmd.exe
6128	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
6128	PING.EXE
5304	PING.EXE
2548	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5332 wrote to memory of 1156	5332	2026-07-14_d23f8f1c514e60dde321f221dcff25e7_elex_wannacry.exe	87
PID 1156 wrote to memory of 2956	1156	WINWORD.exe	88
PID 2956 wrote to memory of 6128	2956	cmd.exe	90
PID 2956 wrote to memory of 5304	2956	cmd.exe	91
PID 2956 wrote to memory of 2548	2956	cmd.exe	92
PID 2956 wrote to memory of 5000	2956	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-07-14_d23f8f1c514e60dde321f221dcff25e7_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-14_d23f8f1c514e60dde321f221dcff25e7_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5332
- 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:1156
- - 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\00004272" 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:2956
  - - 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:6128
  - - 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:5304
  - - 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:2548
  - - 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:5000

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:2460

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

Replay Monitor

Loading Replay Monitor...

Downloads

00004272

Path C:\Users\Admin\AppData\Roaming\Mozilla\00004272
Size 87KB
SHA256 332ba30ff5902ae260488e2087d539c576b3e9be1b79256991bbf5cd4a6e6dff
MD5 f551a4851b22e23fed927af7e5192e79
SHA1 1c7d0b73e4a5a509b8718ddfd60aff4245fa08ff
SHA512 1ed35a9eaf82c8f51230c9ecdb68b703c6c8672b1f83e71f8358db3482753f0adfa032723724942703e0119142b17f995f13e3bc82780213243a86e0fb8f6115
SSDEEP 1536:2LsF2Kerc64sTiX2IV0DpK8SE9nYOzmEQkwpl:2Ly2Kerc64CiGIm1K851YO6EQkwpl
TLSH
T19193A1763A259190C48BD178E8155AA0B932DCF52FF71303E6417AAC59B1E13CFAE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 87KB
SHA256 97ba9912f20485bde6873282d57c594898a3e49768d9450a004bc0872b0f1d4f
MD5 d23f8f1c514e60dde321f221dcff25e7
SHA1 503ac9f3186ad4e35510a3a051c83092f7818acb
SHA512 26d0d2b41555cb19273a27455a88d22c73bd1da48b71c96d2f354278653e9449fcc4e9c0fbb4df27ac1c2dec51df72ff68822f9b03e88fdc757065d62bec9ace
SSDEEP 1536:2LsF2Kerc64sTiX2IV0DpK8SE9nYOzmEQkwpf:2Ly2Kerc64CiGIm1K851YO6EQkwpf
TLSH
T11F93A1763A259190C48BD178E8155AA0B932DCF52FF71303E6417AAC59B1E13CFAE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1156-12-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/5000-15-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/5000-16-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/5332-0-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/5332-9-0x0000000000400000-0x0000000000425000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads