juko | 29c93504d4ec3a149085c7332c9e99828e5981c4045fc69c48a9b5a27aac7007

General

Target
2026-07-03_11d036466350324d3fa2c27bdf8092b9_elex_wannacry.exe
Size 49KB
Sample260703-jsa4zadv6x
SHA256 29c93504d4ec3a149085c7332c9e99828e5981c4045fc69c48a9b5a27aac7007
MD5 11d036466350324d3fa2c27bdf8092b9
SHA1 8bb8108091e030b9e4e57ec3ac9cd476c711c0e2
SHA512 394b2a05e61c599ee69c6f4aef8a24321496e28d59a3dc87bd8a5c543947a7a0a1134c715e5ee7826efef04d3a489cbeada7c5ea8425d1cd8888444cd952eeaa
SSDEEP 1536:VLsF2Kerc64sTiX2IV0DhuD4p4kojVR6h2x:VLy2Kerc64CiGImVucp4kojWh2x
TLSH
T1D4334C0A3BD550C2D56205B0EDAA0F35933BEC391127A75EA780765A1C72D6BCF30E9E
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/1484-0-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/files/0x000a00000001b847-5.dat	family_juko
behavioral2/memory/1484-10-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/memory/5368-12-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/files/0x001200000001c5f8-13.dat	family_juko
behavioral2/memory/5404-15-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/memory/5404-16-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5368	WINWORD.exe
5404	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-1-5-21-2132828192-1552876075-2324613956-1000\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	2026-07-03_11d036466350324d3fa2c27bdf8092b9_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
3208	cmd.exe
5004	PING.EXE
2504	PING.EXE
5144	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5144	PING.EXE
5004	PING.EXE
2504	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1484 wrote to memory of 5368	1484	2026-07-03_11d036466350324d3fa2c27bdf8092b9_elex_wannacry.exe	88
PID 5368 wrote to memory of 3208	5368	WINWORD.exe	89
PID 3208 wrote to memory of 5004	3208	cmd.exe	91
PID 3208 wrote to memory of 2504	3208	cmd.exe	92
PID 3208 wrote to memory of 5144	3208	cmd.exe	93
PID 3208 wrote to memory of 5404	3208	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-07-03_11d036466350324d3fa2c27bdf8092b9_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-03_11d036466350324d3fa2c27bdf8092b9_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1484
- 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:5368
- - 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\00002DF7" 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:3208
  - - 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:5004
  - - 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:2504
  - - 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:5144
  - - 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:5404

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

00002DF7

Path C:\Users\Admin\AppData\Roaming\Mozilla\00002DF7
Size 49KB
SHA256 c36daee7739250a35cad50b0362df4f57be7e91f1c3669a92a2cb2bd3f3857e3
MD5 0437388f6e15958204eec22cdbcd06ee
SHA1 34352f1a1c1ebce16391775395a4d8b64e159758
SHA512 651d5408a69d14498a2e70eaf509860c8f4636fdde9585c6b5b68261d4ff18f3a2cc3fcbccdb0d04460f07f7b7e0257e39aaaa8e8cf738f6607369b17f27ee6a
SSDEEP 1536:VLsF2Kerc64sTiX2IV0DhuD4p4kojVR6h2q:VLy2Kerc64CiGImVucp4kojWh2q
TLSH
T108334B0A3BD550C2D56205B0EDAA0F35933BEC391127A75EA780765A1C72D6BCF30E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 49KB
SHA256 29c93504d4ec3a149085c7332c9e99828e5981c4045fc69c48a9b5a27aac7007
MD5 11d036466350324d3fa2c27bdf8092b9
SHA1 8bb8108091e030b9e4e57ec3ac9cd476c711c0e2
SHA512 394b2a05e61c599ee69c6f4aef8a24321496e28d59a3dc87bd8a5c543947a7a0a1134c715e5ee7826efef04d3a489cbeada7c5ea8425d1cd8888444cd952eeaa
SSDEEP 1536:VLsF2Kerc64sTiX2IV0DhuD4p4kojVR6h2x:VLy2Kerc64CiGImVucp4kojWh2x
TLSH
T1D4334C0A3BD550C2D56205B0EDAA0F35933BEC391127A75EA780765A1C72D6BCF30E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1484-0-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/1484-10-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/5368-12-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/5404-15-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/5404-16-0x0000000000400000-0x0000000000420000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads