juko | 46cf7e222462103c17adbccd5a90554afe93dbb0f71ac59581f200886b12e088

General

Target
2026-05-04_d2c023e95156d81a442e007fdeea5e07_elex_wannacry.exe
Size 64KB
Sample260504-jph1eaet9t
SHA256 46cf7e222462103c17adbccd5a90554afe93dbb0f71ac59581f200886b12e088
MD5 d2c023e95156d81a442e007fdeea5e07
SHA1 29346fa0a87f28ba53c4c3dc2fbbb6322f1084ac
SHA512 ee51809b8b100760421aefac21302209b430f0f553ee933afc66a12bd48159c0fd2e691fc47c72722ba59844cc90c464b84007699f89b5eab8d049605c2bd718
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uu:sLy2Kerc64CiGIm8so28u
TLSH
T12E535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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 2 IoCs

resource	yara_rule
behavioral2/files/0x002600000002b216-4.dat	family_juko
behavioral2/files/0x001b00000002b33b-14.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4256	WINWORD.exe
4360	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-1-5-21-3847269522-1618051987-1942096715-1000\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	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-04_d2c023e95156d81a442e007fdeea5e07_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

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
2972	cmd.exe
2440	PING.EXE
2580	PING.EXE
3228	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2440	PING.EXE
2580	PING.EXE
3228	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3912 wrote to memory of 4256	3912	2026-05-04_d2c023e95156d81a442e007fdeea5e07_elex_wannacry.exe	80
PID 4256 wrote to memory of 2972	4256	WINWORD.exe	81
PID 2972 wrote to memory of 2440	2972	cmd.exe	83
PID 2972 wrote to memory of 2580	2972	cmd.exe	84
PID 2972 wrote to memory of 3228	2972	cmd.exe	85
PID 2972 wrote to memory of 4360	2972	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-05-04_d2c023e95156d81a442e007fdeea5e07_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-04_d2c023e95156d81a442e007fdeea5e07_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3912
- 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:4256
- - 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\00001982" 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:2972
  - - 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:2440
  - - 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:2580
  - - 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:3228
  - - 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:4360

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

00001982

Path C:\Users\Admin\AppData\Roaming\Mozilla\00001982
Size 64KB
SHA256 90a14e0aedb0675653fcef80e871293a082635918867b9b6667429b5cf1e2432
MD5 950c5ea3043f02fd0defd0676d5d43dc
SHA1 3fe230a5adaf154a87864f390605ccc52aeeb11f
SHA512 6cb1bc268b43c90ad285ba9adce92e7387ce4e4e8d0057ecfb0d1f7ce43281f6e9f50c766e498be5424812bd930c427fdc0539cb0816802322856a14726e4721
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uj:sLy2Kerc64CiGIm8so28j
TLSH
T17A535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 46cf7e222462103c17adbccd5a90554afe93dbb0f71ac59581f200886b12e088
MD5 d2c023e95156d81a442e007fdeea5e07
SHA1 29346fa0a87f28ba53c4c3dc2fbbb6322f1084ac
SHA512 ee51809b8b100760421aefac21302209b430f0f553ee933afc66a12bd48159c0fd2e691fc47c72722ba59844cc90c464b84007699f89b5eab8d049605c2bd718
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uu:sLy2Kerc64CiGIm8so28u
TLSH
T12E535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3912-11-0x0000000000830000-0x00000000008AA000-memory.dmp

Download

memory/4256-13-0x0000000000980000-0x00000000009FA000-memory.dmp

Download

memory/4360-16-0x0000000000860000-0x00000000008DA000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads