juko | 1c45dd1dbdaef6a24f60224b422eadb0d3f99e110b84f977e313fced679225b6

Analysis

max time kernel
149s
max time network
146s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
02/05/2026, 08:03

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2026-05-02_c8ff08eaaa317b003a8a16aee1cc8308_elex_wannacry.exe
Size 56KB
Sample260502-jxxtjafs9m
SHA256 1c45dd1dbdaef6a24f60224b422eadb0d3f99e110b84f977e313fced679225b6
MD5 c8ff08eaaa317b003a8a16aee1cc8308
SHA1 471e18b69166f1f228c778605ee0fa39f1bc1e73
SHA512 8a738ae2014b664796f89b5eade4175da93a9faf4d77669001d161a2ba62f4f7b1a6670c3bc32cc916c661fa613dcbea88d878516f5218ed5d80c1f41fcb70c0
SSDEEP 1536:PLsF2Kerc64sTiX2IV0DeRa8OKFVG9WGWP:PLy2Kerc64CiGImqRa8OKFE9WBP
TLSH
T11C4319277AE55CD2C15360F0EAE49B308038FD7219279023E794BB9816BEC92DF7169D
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/6120-0-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/files/0x000f00000000d35d-5.dat	family_juko
behavioral2/memory/6120-13-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/3628-16-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/files/0x001b00000002b45c-17.dat	family_juko
behavioral2/memory/4568-19-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/4568-21-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3628	WINWORD.exe
4568	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-1-5-21-600123060-2148212387-2211176695-1000\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	2026-05-02_c8ff08eaaa317b003a8a16aee1cc8308_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
4744	PING.EXE
5068	PING.EXE
460	PING.EXE
5072	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
460	PING.EXE
4744	PING.EXE
5068	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 6120 wrote to memory of 3628	6120	2026-05-02_c8ff08eaaa317b003a8a16aee1cc8308_elex_wannacry.exe	79
PID 3628 wrote to memory of 5072	3628	WINWORD.exe	80
PID 5072 wrote to memory of 4744	5072	cmd.exe	82
PID 5072 wrote to memory of 5068	5072	cmd.exe	83
PID 5072 wrote to memory of 460	5072	cmd.exe	84
PID 5072 wrote to memory of 4568	5072	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\2026-05-02_c8ff08eaaa317b003a8a16aee1cc8308_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-02_c8ff08eaaa317b003a8a16aee1cc8308_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:6120
- 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:3628
- - 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\00005656" 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:5072
  - - 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:4744
  - - 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:5068
  - - 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:460
  - - 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:4568

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

Replay Monitor

Loading Replay Monitor...

Downloads

00005656

Path C:\Users\Admin\AppData\Roaming\Mozilla\00005656
Size 56KB
SHA256 1ff89d51fde6c970092d11af6ededafe88f531c211187093262292295ebc7ea9
MD5 0796324a3b2f0dd9f2b588da4dc1e5df
SHA1 7273106d430e23990d2555c05b23e8862f0ee004
SHA512 21dc1d13babf25510035a72ddb37ea89d888a7db1badc20e8cf57ca3639673df079f466ab0482ab1166b30d23e81c6ed408a24dab6635cdfedb3808fb128c656
SSDEEP 1536:PLsF2Kerc64sTiX2IV0DeRa8OKFVG9WGWZ:PLy2Kerc64CiGImqRa8OKFE9WBZ
TLSH
T1A14319277AE55CD2C15360F0EAE49B308038FD7219279023E794BB9816BEC92DF7169D
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 56KB
SHA256 1c45dd1dbdaef6a24f60224b422eadb0d3f99e110b84f977e313fced679225b6
MD5 c8ff08eaaa317b003a8a16aee1cc8308
SHA1 471e18b69166f1f228c778605ee0fa39f1bc1e73
SHA512 8a738ae2014b664796f89b5eade4175da93a9faf4d77669001d161a2ba62f4f7b1a6670c3bc32cc916c661fa613dcbea88d878516f5218ed5d80c1f41fcb70c0
SSDEEP 1536:PLsF2Kerc64sTiX2IV0DeRa8OKFVG9WGWP:PLy2Kerc64CiGImqRa8OKFE9WBP
TLSH
T11C4319277AE55CD2C15360F0EAE49B308038FD7219279023E794BB9816BEC92DF7169D
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3628-16-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/3628-15-0x00000000008A0000-0x00000000008EA000-memory.dmp

Download

memory/4568-19-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/4568-20-0x00000000009A0000-0x00000000009EA000-memory.dmp

Download

memory/4568-21-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/6120-0-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/6120-12-0x0000000000870000-0x00000000008BA000-memory.dmp

Download

memory/6120-13-0x0000000000400000-0x0000000000422000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads