juko | 60bd8e03d7dec9a0a89513d74f4963301054abd47cf538ea2fa012734017a5aa

General

Target
2026-04-22_a363dea4dbf8d599d6196d30f8ee4293_elex_wannacry.exe
Size 57KB
Sample260422-dsvwgsbz21
SHA256 60bd8e03d7dec9a0a89513d74f4963301054abd47cf538ea2fa012734017a5aa
MD5 a363dea4dbf8d599d6196d30f8ee4293
SHA1 62633993dd68d142a304c0c0c09d2c10412ac376
SHA512 22e1b15eda08f54761ba66e39bfb056437e1a2d5f526e3618bd4996b7754e9c524f9318304c2d0fb1296afa27fd339a3c2586dc32ffa48dfdd1e9e69af760c0e
SSDEEP 1536:qLsF2Kerc64sTiX2IV0DYlNpyyCwlAY0VdTQI:qLy2Kerc64CiGImklNUyp8Tz
TLSH
T1FF433C16B950B072D99220B06A6D6B36417A9DF10317A1D3E7407ADD68F2FD2EF306CE
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/4484-0-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/files/0x001e00000002b1b8-6.dat	family_juko
behavioral2/memory/4484-12-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/4172-14-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/files/0x001b00000002b39a-15.dat	family_juko
behavioral2/memory/4364-17-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/4364-18-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4172	WINWORD.exe
4364	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-1-5-21-1383858298-2057492509-1726743289-1000\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	2026-04-22_a363dea4dbf8d599d6196d30f8ee4293_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
4464	PING.EXE
1092	PING.EXE
744	cmd.exe
4100	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4100	PING.EXE
4464	PING.EXE
1092	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4484 wrote to memory of 4172	4484	2026-04-22_a363dea4dbf8d599d6196d30f8ee4293_elex_wannacry.exe	80
PID 4172 wrote to memory of 744	4172	WINWORD.exe	81
PID 744 wrote to memory of 4100	744	cmd.exe	83
PID 744 wrote to memory of 4464	744	cmd.exe	84
PID 744 wrote to memory of 1092	744	cmd.exe	85
PID 744 wrote to memory of 4364	744	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-04-22_a363dea4dbf8d599d6196d30f8ee4293_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-22_a363dea4dbf8d599d6196d30f8ee4293_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4484
- 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:4172
- - 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\000015ED" 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:744
  - - 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:4100
  - - 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:4464
  - - 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:1092
  - - 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:4364

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

000015ED

Path C:\Users\Admin\AppData\Roaming\Mozilla\000015ED
Size 57KB
SHA256 f5df8d8eb10f69f99a919ad297ab349c1607a975519b2cd890c2bebd9a282bd6
MD5 9cc114420e87691d258bbb09adce62ea
SHA1 0f7eccb6ed534dc728fd40b7bd235f3cb09a4225
SHA512 33d162a6e0d288923652b18e97749e9882902221c18b3578df3521ddfeeb351e85644d34f34f9ed36b4fac79d69aa2ebf065d4ce814e259e0ea6c5a2c0572e06
SSDEEP 1536:qLsF2Kerc64sTiX2IV0DYlNpyyCwlAY0VdTQU:qLy2Kerc64CiGImklNUyp8T/
TLSH
T158433C16B950B072D99220B06A6D6B36417A9DF10317A1D3E7407ADD68F2FD2EF306CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 57KB
SHA256 60bd8e03d7dec9a0a89513d74f4963301054abd47cf538ea2fa012734017a5aa
MD5 a363dea4dbf8d599d6196d30f8ee4293
SHA1 62633993dd68d142a304c0c0c09d2c10412ac376
SHA512 22e1b15eda08f54761ba66e39bfb056437e1a2d5f526e3618bd4996b7754e9c524f9318304c2d0fb1296afa27fd339a3c2586dc32ffa48dfdd1e9e69af760c0e
SSDEEP 1536:qLsF2Kerc64sTiX2IV0DYlNpyyCwlAY0VdTQI:qLy2Kerc64CiGImklNUyp8Tz
TLSH
T1FF433C16B950B072D99220B06A6D6B36417A9DF10317A1D3E7407ADD68F2FD2EF306CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4172-14-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/4364-17-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/4364-18-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/4484-0-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/4484-12-0x0000000000400000-0x0000000000422000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads