juko | aca17cf02a1075e597b9ba934b39b5e359c9436afcc5550d6bc52061d34ff8d8

General

Target
2026-07-10_0a145593a0e278b83ef91c0eed80b62b_elex_wannacry.exe
Size 56KB
Sample260710-j7ncvahs2z
SHA256 aca17cf02a1075e597b9ba934b39b5e359c9436afcc5550d6bc52061d34ff8d8
MD5 0a145593a0e278b83ef91c0eed80b62b
SHA1 e221a3783d6ceb0e389c4774428ac57843c0183a
SHA512 35b815bc335f1855cda9e6800a14ddeb998da03dffdcc62978bf808cc7ba867d20d00646df8188e810f37cacfe1b088972bf43578fabfdf878c1502e06758484
SSDEEP 1536:PLsF2Kerc64sTiX2IV0DeRa8OKFVG9WGWm:PLy2Kerc64CiGImqRa8OKFE9WBm
TLSH
T1684319277AE55CD2C15360F0EAE49B308038FD7219279023E794BB9816BEC92DF7169D
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/6416-0-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/files/0x0010000000016cb6-5.dat	family_juko
behavioral2/memory/6416-9-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/1932-12-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/files/0x000c00000001c752-13.dat	family_juko
behavioral2/memory/5004-15-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/5004-16-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
1932	WINWORD.exe
5004	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-1-5-21-1014449518-1831897916-4205727055-1000\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	2026-07-10_0a145593a0e278b83ef91c0eed80b62b_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
6736	cmd.exe
6488	PING.EXE
4224	PING.EXE
6932	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
6488	PING.EXE
4224	PING.EXE
6932	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 6416 wrote to memory of 1932	6416	2026-07-10_0a145593a0e278b83ef91c0eed80b62b_elex_wannacry.exe	88
PID 1932 wrote to memory of 6736	1932	WINWORD.exe	89
PID 6736 wrote to memory of 6488	6736	cmd.exe	91
PID 6736 wrote to memory of 4224	6736	cmd.exe	92
PID 6736 wrote to memory of 6932	6736	cmd.exe	93
PID 6736 wrote to memory of 5004	6736	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-07-10_0a145593a0e278b83ef91c0eed80b62b_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-10_0a145593a0e278b83ef91c0eed80b62b_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:6416
- 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:1932
- - 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\00007C6B" 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:6736
  - - 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:6488
  - - 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:4224
  - - 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:6932
  - - 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:5004

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:7036

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

00007C6B

Path C:\Users\Admin\AppData\Roaming\Mozilla\00007C6B
Size 56KB
SHA256 2ea4b98a2f6991977801afbc4344a5e0c215d4efc21e5f9017e90a6238e66604
MD5 2188fdca68c08d50dd3e37bb8765d231
SHA1 bab8e2996cf441bca4ace503ac425d0a3ec0654f
SHA512 a2b3547633ab45e88073b37c0806df54bc40622491466dd257b610e980dad6d4a598ad326d4b1128395576431b163351c3b13ae32939a3806210e2868bd71fef
SSDEEP 1536:PLsF2Kerc64sTiX2IV0DeRa8OKFVG9WGWq:PLy2Kerc64CiGImqRa8OKFE9WBq
TLSH
T1884319277AE55CD2C15360F0EAE49B308038FD7219279023E794BB9816BEC92DF7169D
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 56KB
SHA256 aca17cf02a1075e597b9ba934b39b5e359c9436afcc5550d6bc52061d34ff8d8
MD5 0a145593a0e278b83ef91c0eed80b62b
SHA1 e221a3783d6ceb0e389c4774428ac57843c0183a
SHA512 35b815bc335f1855cda9e6800a14ddeb998da03dffdcc62978bf808cc7ba867d20d00646df8188e810f37cacfe1b088972bf43578fabfdf878c1502e06758484
SSDEEP 1536:PLsF2Kerc64sTiX2IV0DeRa8OKFVG9WGWm:PLy2Kerc64CiGImqRa8OKFE9WBm
TLSH
T1684319277AE55CD2C15360F0EAE49B308038FD7219279023E794BB9816BEC92DF7169D
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1932-12-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/5004-15-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/5004-16-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/6416-0-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/6416-9-0x0000000000400000-0x0000000000422000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads