juko | 363e3c867c59a1846b2b651b1c3eda6b9f5c268ac32eac6decaa9c0b083d4db9

General

Target
2026-11-09_bd23c2437a40e8f8b06c9b75a04490be_elex_wannacry.exe
Size 88KB
Sample261110-m8dftaas31
SHA256 363e3c867c59a1846b2b651b1c3eda6b9f5c268ac32eac6decaa9c0b083d4db9
MD5 bd23c2437a40e8f8b06c9b75a04490be
SHA1 d340f151cb4d8888d58fcbc6bdaf661d0e1fecf6
SHA512 71e346bc0d8dd6728be924af3a7f88bcf3fc9e7f09d2a246ae96ce60a1ee2c3967677c29208cd69ab20667c3d43ce86558f9fc8d557ae19caff3ced45d886aed
SSDEEP 1536:5LsF2Kerc64sTiX2IV0DVk2Lbuzc/9yH8Ky9193jiT5l364KlVk937tgrm:5Ly2Kerc64CiGImRRLyzc/9yH8Ka193O
TLSH
T136934A8F73251205D9770979A2052F19AC3DADE78357A04CA7C4B1693833D3ACB3F6A9
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/0x000700000001b85a-3.dat	family_juko
behavioral2/files/0x000e00000001c422-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
1248	WINWORD.exe
2564	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-1-5-21-1404337215-1550464601-2805570857-1000\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
2680	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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-11-09_bd23c2437a40e8f8b06c9b75a04490be_elex_wannacry.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
2680	cmd.exe
5900	PING.EXE
1312	PING.EXE
460	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5900	PING.EXE
1312	PING.EXE
460	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5440 wrote to memory of 1248	5440	2026-11-09_bd23c2437a40e8f8b06c9b75a04490be_elex_wannacry.exe	89
PID 1248 wrote to memory of 2680	1248	WINWORD.exe	90
PID 2680 wrote to memory of 5900	2680	cmd.exe	92
PID 2680 wrote to memory of 1312	2680	cmd.exe	93
PID 2680 wrote to memory of 460	2680	cmd.exe	94
PID 2680 wrote to memory of 2564	2680	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-11-09_bd23c2437a40e8f8b06c9b75a04490be_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-09_bd23c2437a40e8f8b06c9b75a04490be_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5440
- 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:1248
- - 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\00005F5A" 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:2680
  - - 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:5900
  - - 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:1312
  - - 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
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      PID:2564

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

00005F5A

Path C:\Users\Admin\AppData\Roaming\Mozilla\00005F5A
Size 88KB
SHA256 8a7218351c6c251e20e3d2f1762be62df840f6938f2b5e25aa3268b086e302bc
MD5 ed4678b8b87e66b082a47e4353868eba
SHA1 f52ad930d33770624c187a632cf2db650550b601
SHA512 0c1c1f45e05ed6912f599f6a70542f6106685f46c9f8f7f841a687cc260f34c6fd6cf20ee7070c6cb26d54cad819e6a630914be1ff62bdb1cb27df19fd007261
SSDEEP 1536:5LsF2Kerc64sTiX2IV0DVk2Lbuzc/9yH8Ky9193jiT5l364KlVk937tgrc:5Ly2Kerc64CiGImRRLyzc/9yH8Ka1930
TLSH
T173934A8F73251205D9770979A2052F19AC3DADE78357A04CA7C4B1693833D3ACB3F6A9
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 88KB
SHA256 363e3c867c59a1846b2b651b1c3eda6b9f5c268ac32eac6decaa9c0b083d4db9
MD5 bd23c2437a40e8f8b06c9b75a04490be
SHA1 d340f151cb4d8888d58fcbc6bdaf661d0e1fecf6
SHA512 71e346bc0d8dd6728be924af3a7f88bcf3fc9e7f09d2a246ae96ce60a1ee2c3967677c29208cd69ab20667c3d43ce86558f9fc8d557ae19caff3ced45d886aed
SSDEEP 1536:5LsF2Kerc64sTiX2IV0DVk2Lbuzc/9yH8Ky9193jiT5l364KlVk937tgrm:5Ly2Kerc64CiGImRRLyzc/9yH8Ka193O
TLSH
T136934A8F73251205D9770979A2052F19AC3DADE78357A04CA7C4B1693833D3ACB3F6A9
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads