juko | da1094e3c99a29a81bd0f9bb89abc5968aff5370c04e2dc8e1e699b2ea6a34d4

General

Target
2026-11-11_007bbafbaca10b7c1181bba4e42a102b_elex_wannacry.exe
Size 32KB
Sample261113-xbrbhsft6x
SHA256 da1094e3c99a29a81bd0f9bb89abc5968aff5370c04e2dc8e1e699b2ea6a34d4
MD5 007bbafbaca10b7c1181bba4e42a102b
SHA1 6dddca30505d6e26347a285723c850d491b65b19
SHA512 ecf0183b200393393e004c916f22fe18dcba38bea54da6653ee03a575b94d3f4dc0c8a4a56620e4daa6e7364e13f57859d4f0dc5420fd30c7ae80cc399f655a2
SSDEEP 768:2ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqxNPWQH4lGl:iLsF2Kerc64sTiX2IV0D2hI
TLSH
T122E22A2B6AA17052C59320F0F9592F34C43D9DB9116BB062F7417B6928B2D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution 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/0x000e00000001c466-3.dat	family_juko
behavioral2/files/0x0004000000000413-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2704	WINWORD.exe
4660	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-1-5-21-4280978039-528710165-233981602-1000\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

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
3880	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	WINWORD.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	WINWORD.exe

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	2026-11-11_007bbafbaca10b7c1181bba4e42a102b_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
3880	cmd.exe
5440	PING.EXE
5108	PING.EXE
2840	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5440	PING.EXE
5108	PING.EXE
2840	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4772 wrote to memory of 2704	4772	2026-11-11_007bbafbaca10b7c1181bba4e42a102b_elex_wannacry.exe	89
PID 2704 wrote to memory of 3880	2704	WINWORD.exe	90
PID 3880 wrote to memory of 5440	3880	cmd.exe	92
PID 3880 wrote to memory of 5108	3880	cmd.exe	93
PID 3880 wrote to memory of 2840	3880	cmd.exe	94
PID 3880 wrote to memory of 4660	3880	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-11-11_007bbafbaca10b7c1181bba4e42a102b_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-11_007bbafbaca10b7c1181bba4e42a102b_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4772
- 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:2704
- - 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\00000835" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:3880
  - - 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:5440
  - - 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:5108
  - - 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:2840
  - - 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
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      PID:4660

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

2

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

00000835

Path C:\Users\Admin\AppData\Roaming\Mozilla\00000835
Size 32KB
SHA256 b4ab34f9810f3a88ed2053b5f792e85c77d46878cd07bd22a235cb3cc1fe4e16
MD5 cdb13f56421bbed48e4c352be412612c
SHA1 a1de84f2a0cbb8bfd510bb6be43f5871e378e31a
SHA512 76f83d73bff0d99e16798999012d55e510b1cde4ecdc271ccd1d8ca11b05d00d6bc8411130ef8f6a101f6d02327c1caadc7c9f8a9643de288c613642e17515e0
SSDEEP 768:2ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqxNPWQH4lGd:iLsF2Kerc64sTiX2IV0D2hM
TLSH
T175E23A2B6AA17052C59320F0F9592F34C43D9DB9016BB062F7417B6928B2D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 da1094e3c99a29a81bd0f9bb89abc5968aff5370c04e2dc8e1e699b2ea6a34d4
MD5 007bbafbaca10b7c1181bba4e42a102b
SHA1 6dddca30505d6e26347a285723c850d491b65b19
SHA512 ecf0183b200393393e004c916f22fe18dcba38bea54da6653ee03a575b94d3f4dc0c8a4a56620e4daa6e7364e13f57859d4f0dc5420fd30c7ae80cc399f655a2
SSDEEP 768:2ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqxNPWQH4lGl:iLsF2Kerc64sTiX2IV0D2hI
TLSH
T122E22A2B6AA17052C59320F0F9592F34C43D9DB9116BB062F7417B6928B2D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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