juko | 10c9c02d21cdcba4c64653a712d1faebf4e0d1d2994a9aa85a3ceaa730c0b773

Analysis

max time kernel
149s
max time network
147s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
04/05/2026, 16:53

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General

Target
2026-05-04_5181049bbc6c31315e6f35c173ce3b33_elex_wannacry.exe
Size 61KB
Sample260504-vecw7ab13j
SHA256 10c9c02d21cdcba4c64653a712d1faebf4e0d1d2994a9aa85a3ceaa730c0b773
MD5 5181049bbc6c31315e6f35c173ce3b33
SHA1 3fc2c684909f706c9f7eb9d934c748e8b6e0014b
SHA512 8be632c3ed43609bfec9ae0daf8656926f26f9776e2fba35da4b79ff3a811b0cefbbe6c2d5846cce6290b5b97eadb682e53ff948418b624a4e1f140712a07324
SSDEEP 1536:yLsF2Kerc64sTiX2IV0DZZbyyCwlAY0VdTQK:yLy2Kerc64CiGImVZuyp8TB
TLSH
T13C532C26B950B072D95220B06A6D6B36417A9DF10317A1D3E7407ADC68F2FD2EF306CE
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/2572-0-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/files/0x001b00000002b48b-5.dat	family_juko
behavioral2/memory/2572-13-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/1060-16-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/files/0x001b00000002b48f-17.dat	family_juko
behavioral2/memory/3488-19-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/3488-28-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
1060	WINWORD.exe
3488	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-1-5-21-1456842261-3464001825-2855069093-1000\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	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-04_5181049bbc6c31315e6f35c173ce3b33_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

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
6004	cmd.exe
5892	PING.EXE
2380	PING.EXE
3628	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5892	PING.EXE
2380	PING.EXE
3628	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2572 wrote to memory of 1060	2572	2026-05-04_5181049bbc6c31315e6f35c173ce3b33_elex_wannacry.exe	78
PID 1060 wrote to memory of 6004	1060	WINWORD.exe	79
PID 6004 wrote to memory of 5892	6004	cmd.exe	81
PID 6004 wrote to memory of 2380	6004	cmd.exe	82
PID 6004 wrote to memory of 3628	6004	cmd.exe	83
PID 6004 wrote to memory of 3488	6004	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\2026-05-04_5181049bbc6c31315e6f35c173ce3b33_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-04_5181049bbc6c31315e6f35c173ce3b33_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2572
- 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:1060
- - 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\00003D07" 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:6004
  - - 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:5892
  - - 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:2380
  - - 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:3628
  - - 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:3488

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

00003D07

Path C:\Users\Admin\AppData\Roaming\Mozilla\00003D07
Size 61KB
SHA256 525455b170cd89f7cde960cbdf5d5306fa4738322576368b6f9bba855da66228
MD5 5f0bfa5b5aecd93710250feb70bb8489
SHA1 59bf980386cd81ef3b1cb8398d0a5830f7c40d0b
SHA512 336004725180878f7847db83d5b7ac6acdc3357e96752b9f170537f002eb6d47f358273b005171d9d8eedcfad4bd6fd7b3250309168aaeb56aec9d4d05b1a855
SSDEEP 1536:yLsF2Kerc64sTiX2IV0DZZbyyCwlAY0VdTQw:yLy2Kerc64CiGImVZuyp8Tr
TLSH
T169532C26B950B072D95220B06A6D6B36417A9DF10317A1D3E7407ADC68F2FD2EF306CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 61KB
SHA256 10c9c02d21cdcba4c64653a712d1faebf4e0d1d2994a9aa85a3ceaa730c0b773
MD5 5181049bbc6c31315e6f35c173ce3b33
SHA1 3fc2c684909f706c9f7eb9d934c748e8b6e0014b
SHA512 8be632c3ed43609bfec9ae0daf8656926f26f9776e2fba35da4b79ff3a811b0cefbbe6c2d5846cce6290b5b97eadb682e53ff948418b624a4e1f140712a07324
SSDEEP 1536:yLsF2Kerc64sTiX2IV0DZZbyyCwlAY0VdTQK:yLy2Kerc64CiGImVZuyp8TB
TLSH
T13C532C26B950B072D95220B06A6D6B36417A9DF10317A1D3E7407ADC68F2FD2EF306CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1060-15-0x00000000008D0000-0x0000000000992000-memory.dmp

Download

memory/1060-16-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/2572-12-0x0000000000840000-0x0000000000902000-memory.dmp

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memory/2572-0-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/2572-13-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/3488-19-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/3488-20-0x0000000000980000-0x0000000000A42000-memory.dmp

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memory/3488-22-0x0000000000980000-0x0000000000A42000-memory.dmp

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memory/3488-28-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/3488-33-0x0000000000980000-0x0000000000A42000-memory.dmp

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memory/3488-34-0x0000000000980000-0x0000000000A42000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads