juko | 1ae464698e64fc6be82363b0e23ecfb76390912ce3176df5c2ae100ff0414deb

General

Target
2026-07-04_92d5df5e4667ebea10fb27f9e3dea61d_elex_wannacry.exe
Size 30KB
Sample260704-wp71rae16j
SHA256 1ae464698e64fc6be82363b0e23ecfb76390912ce3176df5c2ae100ff0414deb
MD5 92d5df5e4667ebea10fb27f9e3dea61d
SHA1 945bd2636c96f906333d2e8c5b6222ce464a05fb
SHA512 8c061960eb5adaad4c942d0755b126265e2143fc4a3c23002c4b69670e63d5458171f9384937a57e4a9fab85b4498547229911b8a95f151ae4142d685f3ebb46
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHX0:tLsF2Kerc64sTiX2IV0Dzlo0
TLSH
T116E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
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/0x0019000000011504-4.dat	family_juko
behavioral2/files/0x000f00000001c567-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
1208	WINWORD.exe
2140	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-1-5-21-2639994890-966400312-4246138405-1000\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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-07-04_92d5df5e4667ebea10fb27f9e3dea61d_elex_wannacry.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
2696	cmd.exe
4608	PING.EXE
464	PING.EXE
5136	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4608	PING.EXE
464	PING.EXE
5136	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5440 wrote to memory of 1208	5440	2026-07-04_92d5df5e4667ebea10fb27f9e3dea61d_elex_wannacry.exe	88
PID 1208 wrote to memory of 2696	1208	WINWORD.exe	89
PID 2696 wrote to memory of 4608	2696	cmd.exe	91
PID 2696 wrote to memory of 464	2696	cmd.exe	92
PID 2696 wrote to memory of 5136	2696	cmd.exe	93
PID 2696 wrote to memory of 2140	2696	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-07-04_92d5df5e4667ebea10fb27f9e3dea61d_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-04_92d5df5e4667ebea10fb27f9e3dea61d_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5440
- 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:1208
- - 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\00006E94" 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:2696
  - - 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:4608
  - - 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:464
  - - 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:5136
  - - 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:2140

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

00006E94

Path C:\Users\Admin\AppData\Roaming\Mozilla\00006E94
Size 30KB
SHA256 497d1e8a9336b276451d5099001987695eaaa9d55f662ef2c4f6a6c913abc745
MD5 cffb7fcda574ce8017b60c9011b38102
SHA1 baae7297ba52eab3a44ec2d6ec480e08eb524df6
SHA512 4de411fa4ae54b5e4b68ffef4c4efd09d8a45595055a8d0bea3329129a9cf2fd782cdef5b423f041ce0527c4bba2e4e946d4455ba4ae8221740aaef2e40915e9
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXA:tLsF2Kerc64sTiX2IV0DzloA
TLSH
T1F2E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 30KB
SHA256 1ae464698e64fc6be82363b0e23ecfb76390912ce3176df5c2ae100ff0414deb
MD5 92d5df5e4667ebea10fb27f9e3dea61d
SHA1 945bd2636c96f906333d2e8c5b6222ce464a05fb
SHA512 8c061960eb5adaad4c942d0755b126265e2143fc4a3c23002c4b69670e63d5458171f9384937a57e4a9fab85b4498547229911b8a95f151ae4142d685f3ebb46
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHX0:tLsF2Kerc64sTiX2IV0Dzlo0
TLSH
T116E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
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