juko | 5601a4eda687d1137a237e0c03dad18b9d84e5aa4291a109fef5c312f817e891

General

Target
2026-08-12_d5b05ddbf87eb8dbf5470bf52f091923_elex_wannacry.exe
Size 64KB
Sample260813-abtejsgj8x
SHA256 5601a4eda687d1137a237e0c03dad18b9d84e5aa4291a109fef5c312f817e891
MD5 d5b05ddbf87eb8dbf5470bf52f091923
SHA1 ac362300cff5e2d398d9ab5c8929e70c2c3d55a2
SHA512 433c5fe53f6dafe6acbabaf43fefb28563dbde99a9a4f0fe2a8959b30a638ced3c43f39575066a1dcf4e4a4669088c965d9213ad9f72b9f16f3e84203e60edf8
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/ui:sLy2Kerc64CiGIm8so28i
TLSH
T1ED535C2AA5A220F8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution 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/0x001300000001c4b3-4.dat	family_juko
behavioral2/files/0x000d00000001c5f1-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2256	WINWORD.exe
4880	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-1-5-21-2115213192-531537726-3295841909-1000\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

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
2952	cmd.exe

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	2026-08-12_d5b05ddbf87eb8dbf5470bf52f091923_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
3980	PING.EXE
5452	PING.EXE
4468	PING.EXE
2952	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3980	PING.EXE
5452	PING.EXE
4468	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4352 wrote to memory of 2256	4352	2026-08-12_d5b05ddbf87eb8dbf5470bf52f091923_elex_wannacry.exe	88
PID 2256 wrote to memory of 2952	2256	WINWORD.exe	89
PID 2952 wrote to memory of 3980	2952	cmd.exe	91
PID 2952 wrote to memory of 5452	2952	cmd.exe	92
PID 2952 wrote to memory of 4468	2952	cmd.exe	93
PID 2952 wrote to memory of 4880	2952	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-08-12_d5b05ddbf87eb8dbf5470bf52f091923_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-12_d5b05ddbf87eb8dbf5470bf52f091923_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4352
- 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:2256
- - 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\00007826" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    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:3980
  - - 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:5452
  - - 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:4468
  - - 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:4880

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

00007826

Path C:\Users\Admin\AppData\Roaming\Mozilla\00007826
Size 64KB
SHA256 b938b5412b788043862c03be118ff8932f16fa87df85f2bfe8e388253ed714c2
MD5 1672aafae75ec9e4dd704c342b7bb2e1
SHA1 14c080c237b90d12e16aeb361c1c63bd16ba2796
SHA512 50962964e65c323819c15f643ae9f82cbb0aa44119bc7ad73ca5109e0bc77614f2936039b07afd2c98f4147bee45b3a61eb700cb802b136981f949b1f0941199
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/un:sLy2Kerc64CiGIm8so28n
TLSH
T174535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 5601a4eda687d1137a237e0c03dad18b9d84e5aa4291a109fef5c312f817e891
MD5 d5b05ddbf87eb8dbf5470bf52f091923
SHA1 ac362300cff5e2d398d9ab5c8929e70c2c3d55a2
SHA512 433c5fe53f6dafe6acbabaf43fefb28563dbde99a9a4f0fe2a8959b30a638ced3c43f39575066a1dcf4e4a4669088c965d9213ad9f72b9f16f3e84203e60edf8
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/ui:sLy2Kerc64CiGIm8so28i
TLSH
T1ED535C2AA5A220F8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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