juko | 67d08da4023beef715611a19b06d86ef39639dd49f6456765c18d6293032a81c

General

Target
2026-07-09_ebe477fa19eae355c4cc129789afa0ac_elex_wannacry.exe
Size 68KB
Sample260709-jncf8se151
SHA256 67d08da4023beef715611a19b06d86ef39639dd49f6456765c18d6293032a81c
MD5 ebe477fa19eae355c4cc129789afa0ac
SHA1 f6a3d2e332373e25cca85773fe5846f4542e748f
SHA512 bd9447f24dfa9a7e02406edba2f3f2d6c19ced3f9fb72d00efa1796fa5d545020180affe38089bebcba800b6ff01ee0ea7e0374cd87efa3aeb6e22ecc6a2fb38
SSDEEP 768:4ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHd2LGm4a4RjF+S7wpo:0LsF2Kerc64sTiX2IV0DVk2LGmEQkwpo
TLSH
T14F63A0B629761011C48BD478E8186A60B933CCF53BF75753E3017AA89AB4D538FDE8C6
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/5664-0-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/files/0x0005000000016b41-5.dat	family_juko
behavioral2/memory/5664-9-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/memory/6068-12-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/files/0x0006000000016caa-13.dat	family_juko
behavioral2/memory/700-15-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/memory/700-16-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
6068	WINWORD.exe
700	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-1-5-21-2377119455-1173575704-3843639301-1000\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	2026-07-09_ebe477fa19eae355c4cc129789afa0ac_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
2884	PING.EXE
4876	cmd.exe
2268	PING.EXE
5488	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2268	PING.EXE
5488	PING.EXE
2884	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5664 wrote to memory of 6068	5664	2026-07-09_ebe477fa19eae355c4cc129789afa0ac_elex_wannacry.exe	88
PID 6068 wrote to memory of 4876	6068	WINWORD.exe	89
PID 4876 wrote to memory of 2268	4876	cmd.exe	91
PID 4876 wrote to memory of 5488	4876	cmd.exe	92
PID 4876 wrote to memory of 2884	4876	cmd.exe	93
PID 4876 wrote to memory of 700	4876	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-07-09_ebe477fa19eae355c4cc129789afa0ac_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-09_ebe477fa19eae355c4cc129789afa0ac_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5664
- 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:6068
- - 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\00000BB8" 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:4876
  - - 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:2268
  - - 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:5488
  - - 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:2884
  - - 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:700

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

00000BB8

Path C:\Users\Admin\AppData\Roaming\Mozilla\00000BB8
Size 68KB
SHA256 6c5f2721b71fc528599826593bf1548a7f41156d2abf74473e4292a5e1640487
MD5 790872ae629d104b7515f7a028d1f639
SHA1 f65c0ec64d6571e7a70e69b2ee90fd7baa18feb3
SHA512 1cc66b579fd3183a0faeb786830281b335e75e83647865453625e892ff3af8c277c7c666a9141bf8d7149794241ed3edae785dfd7c093c03cd879c15ab06cd11
SSDEEP 768:4ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHd2LGm4a4RjF+S7wpL:0LsF2Kerc64sTiX2IV0DVk2LGmEQkwpL
TLSH
T1B463A0B629761011C48BD478E8186A60B933CCF53BF75753E3017AA89AB4D138FDE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 68KB
SHA256 67d08da4023beef715611a19b06d86ef39639dd49f6456765c18d6293032a81c
MD5 ebe477fa19eae355c4cc129789afa0ac
SHA1 f6a3d2e332373e25cca85773fe5846f4542e748f
SHA512 bd9447f24dfa9a7e02406edba2f3f2d6c19ced3f9fb72d00efa1796fa5d545020180affe38089bebcba800b6ff01ee0ea7e0374cd87efa3aeb6e22ecc6a2fb38
SSDEEP 768:4ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHd2LGm4a4RjF+S7wpo:0LsF2Kerc64sTiX2IV0DVk2LGmEQkwpo
TLSH
T14F63A0B629761011C48BD478E8186A60B933CCF53BF75753E3017AA89AB4D538FDE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/700-15-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/700-16-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/5664-0-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/5664-9-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/6068-12-0x0000000000400000-0x0000000000425000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads