juko | f498f018c4a707253ae482ffdcc1a5b43666ef284db202cd4dec14c83094a12f

General

Target
2026-05-29_2e68e4552b5071888b0df403674b5817_elex_wannacry.exe
Size 64KB
Sample260529-2desqaa19x
SHA256 f498f018c4a707253ae482ffdcc1a5b43666ef284db202cd4dec14c83094a12f
MD5 2e68e4552b5071888b0df403674b5817
SHA1 bdf2d184da3f947d5647d16d30d720fb1e14f6ae
SHA512 acb1be3cf61ae847ceb8ce118ff0e88ce2a8715231a37fdcc10b0e0238afa9829b2c9cebdd5e8bc83973cacbef90df659fabeb10fbfd0f965884fa0c2b2c4f4b
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uG:sLy2Kerc64CiGIm8so28G
TLSH
T12B535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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/0x001f00000002b329-4.dat	family_juko
behavioral2/files/0x001b00000002b538-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5028	WINWORD.exe
804	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-1-5-21-2409539145-3342400454-2096821238-1000\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	2026-05-29_2e68e4552b5071888b0df403674b5817_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
3660	cmd.exe
3384	PING.EXE
2952	PING.EXE
3628	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3384	PING.EXE
2952	PING.EXE
3628	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3760 wrote to memory of 5028	3760	2026-05-29_2e68e4552b5071888b0df403674b5817_elex_wannacry.exe	80
PID 5028 wrote to memory of 3660	5028	WINWORD.exe	81
PID 3660 wrote to memory of 3384	3660	cmd.exe	83
PID 3660 wrote to memory of 2952	3660	cmd.exe	84
PID 3660 wrote to memory of 3628	3660	cmd.exe	85
PID 3660 wrote to memory of 804	3660	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-05-29_2e68e4552b5071888b0df403674b5817_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-29_2e68e4552b5071888b0df403674b5817_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3760
- 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:5028
- - 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\00007528" 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:3660
  - - 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:3384
  - - 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:2952
  - - 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:3628
  - - 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:804

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

00007528

Path C:\Users\Admin\AppData\Roaming\Mozilla\00007528
Size 64KB
SHA256 3ccdd8221bc160340e50f476adf25a8ac0eecba475917d2476c7cc5ae3ac5f5e
MD5 033c6e773f218418bf902ec562463c65
SHA1 0615558050d5e6f0a36ce308de405e545df99911
SHA512 baf13ae6fecb12933e7d60ce12be4979abe993cda1737ab30246f48c1e58d880e84d09a204be1706371b453b3c7449c00616fb0ba3a5340eb57c010796d5feef
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uO:sLy2Kerc64CiGIm8so28O
TLSH
T133535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 f498f018c4a707253ae482ffdcc1a5b43666ef284db202cd4dec14c83094a12f
MD5 2e68e4552b5071888b0df403674b5817
SHA1 bdf2d184da3f947d5647d16d30d720fb1e14f6ae
SHA512 acb1be3cf61ae847ceb8ce118ff0e88ce2a8715231a37fdcc10b0e0238afa9829b2c9cebdd5e8bc83973cacbef90df659fabeb10fbfd0f965884fa0c2b2c4f4b
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uG:sLy2Kerc64CiGIm8so28G
TLSH
T12B535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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