juko | a27c114964a52ade04abc1a3297fb4976b02a81a25316d0829857cbeca5ed632

General

Target
2026-06-30_a7357d0b7d49fe28a4f8f6349e8625d7_elex_wannacry.exe
Size 30KB
Sample260701-d1cd4sdw3m
SHA256 a27c114964a52ade04abc1a3297fb4976b02a81a25316d0829857cbeca5ed632
MD5 a7357d0b7d49fe28a4f8f6349e8625d7
SHA1 7b0a5a4e0c429b075b95f0b768b41cf6588a120d
SHA512 1c129ed57d3076f2a62531a0ed6229d3e7654655b73fc31ee8e2bc11c9bef3ca3e76334f5b2230f6f3103bccc031dd342682d994888323c60bbde18b3de23e65
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXP:tLsF2Kerc64sTiX2IV0DzloP
TLSH
T19FE26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
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/0x0007000000016b43-4.dat	family_juko
behavioral2/files/0x001700000001c44c-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5068	WINWORD.exe
5088	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-1-5-21-2132828192-1552876075-2324613956-1000\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	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	2026-06-30_a7357d0b7d49fe28a4f8f6349e8625d7_elex_wannacry.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
1420	cmd.exe
3452	PING.EXE
3744	PING.EXE
5652	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3744	PING.EXE
5652	PING.EXE
3452	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3520 wrote to memory of 5068	3520	2026-06-30_a7357d0b7d49fe28a4f8f6349e8625d7_elex_wannacry.exe	88
PID 5068 wrote to memory of 1420	5068	WINWORD.exe	89
PID 1420 wrote to memory of 3452	1420	cmd.exe	91
PID 1420 wrote to memory of 3744	1420	cmd.exe	92
PID 1420 wrote to memory of 5652	1420	cmd.exe	93
PID 1420 wrote to memory of 5088	1420	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-06-30_a7357d0b7d49fe28a4f8f6349e8625d7_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-30_a7357d0b7d49fe28a4f8f6349e8625d7_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3520
- 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:5068
- - 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\00005C52" 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:1420
  - - 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:3452
  - - 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:3744
  - - 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:5652
  - - 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:5088

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

00005C52

Path C:\Users\Admin\AppData\Roaming\Mozilla\00005C52
Size 30KB
SHA256 e0bdf8bafb3874cc613be7268625e012b8a026da5d171775ae1ae8054cfe6383
MD5 99c651bbbec1a1af02e0af6a6b174d52
SHA1 5f00ce0006e180145a1649cfd093a7c3b8d9c8bd
SHA512 baefdedc616a589c062ac9f0f51b33e892edac9bb31bc9fa0b4e007e0fe1c78c3f2bda2f5299f95bb572986f3e2816a115533a06857f80cf2019fbff8fcb0715
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXH:tLsF2Kerc64sTiX2IV0DzloH
TLSH
T186E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 30KB
SHA256 a27c114964a52ade04abc1a3297fb4976b02a81a25316d0829857cbeca5ed632
MD5 a7357d0b7d49fe28a4f8f6349e8625d7
SHA1 7b0a5a4e0c429b075b95f0b768b41cf6588a120d
SHA512 1c129ed57d3076f2a62531a0ed6229d3e7654655b73fc31ee8e2bc11c9bef3ca3e76334f5b2230f6f3103bccc031dd342682d994888323c60bbde18b3de23e65
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXP:tLsF2Kerc64sTiX2IV0DzloP
TLSH
T19FE26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
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