juko | 61bd7009bb04525f618dc7778ffdb6872259dd0f143cccfdba3949235ef6729c

General

Target
2026-07-16_076415d313b10205524081f5eebe3dc8_elex_wannacry.exe
Size 68KB
Sample260716-dhrfbaft7t
SHA256 61bd7009bb04525f618dc7778ffdb6872259dd0f143cccfdba3949235ef6729c
MD5 076415d313b10205524081f5eebe3dc8
SHA1 80a28116e7912f9cea6314ed2f9b0694bb2f496e
SHA512 2bd81b714a16c2514d8c66129f61d5f5dfc58d5e7b3d32db319a3c60061ca598e9af3703a296bf3aa35e16c83a859739fd91345f96117937bbd5b110df6c57dc
SSDEEP 768:4ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHd2LGm4a4RjF+S7wp9:0LsF2Kerc64sTiX2IV0DVk2LGmEQkwp9
TLSH
T18963A0B629761011C48BD478E8186A60B933CCF53BF75753E3017AA89AB4D138FDE8C6
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/1444-0-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/files/0x00080000000187d5-5.dat	family_juko
behavioral2/memory/1444-9-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/memory/5020-12-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/files/0x001400000001c4b1-13.dat	family_juko
behavioral2/memory/5968-15-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/memory/5968-16-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5020	WINWORD.exe
5968	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-1-5-21-1875162379-3804078649-638427191-1000\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	2026-07-16_076415d313b10205524081f5eebe3dc8_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
2768	cmd.exe
3024	PING.EXE
2632	PING.EXE
4840	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3024	PING.EXE
2632	PING.EXE
4840	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1444 wrote to memory of 5020	1444	2026-07-16_076415d313b10205524081f5eebe3dc8_elex_wannacry.exe	89
PID 5020 wrote to memory of 2768	5020	WINWORD.exe	90
PID 2768 wrote to memory of 3024	2768	cmd.exe	92
PID 2768 wrote to memory of 2632	2768	cmd.exe	93
PID 2768 wrote to memory of 4840	2768	cmd.exe	94
PID 2768 wrote to memory of 5968	2768	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-07-16_076415d313b10205524081f5eebe3dc8_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-16_076415d313b10205524081f5eebe3dc8_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1444
- 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:5020
- - 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\00007D17" 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:2768
  - - 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:3024
  - - 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:2632
  - - 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:4840
  - - 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:5968

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

00007D17

Path C:\Users\Admin\AppData\Roaming\Mozilla\00007D17
Size 68KB
SHA256 cd6c755855247c99bfcb193cbd2189a4fdc2b1b72cdf4177ccf53f976d6d39a9
MD5 ab8760808dc0fad7e31ac62d592ed54e
SHA1 6c9eea2fb2945247efa8393ffb6586e2bc267747
SHA512 948bd615234247eadd7d1b054df3dc0d951483e83637b75035a11f60309d8476704987d0a56de85015421de00241828140d7cec792edf0eca7de671e9a9df6fb
SSDEEP 768:4ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHd2LGm4a4RjF+S7wpn:0LsF2Kerc64sTiX2IV0DVk2LGmEQkwpn
TLSH
T16763A0B629761011C48BD478E9186A60B933CCF53BF75753E3017AA89AB4D138FDE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 68KB
SHA256 61bd7009bb04525f618dc7778ffdb6872259dd0f143cccfdba3949235ef6729c
MD5 076415d313b10205524081f5eebe3dc8
SHA1 80a28116e7912f9cea6314ed2f9b0694bb2f496e
SHA512 2bd81b714a16c2514d8c66129f61d5f5dfc58d5e7b3d32db319a3c60061ca598e9af3703a296bf3aa35e16c83a859739fd91345f96117937bbd5b110df6c57dc
SSDEEP 768:4ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHd2LGm4a4RjF+S7wp9:0LsF2Kerc64sTiX2IV0DVk2LGmEQkwp9
TLSH
T18963A0B629761011C48BD478E8186A60B933CCF53BF75753E3017AA89AB4D138FDE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1444-0-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/1444-9-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/5020-12-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/5968-15-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/5968-16-0x0000000000400000-0x0000000000425000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads