juko | 4e19bcbcd3b427264609a8b667d0c32cbc1483e8aac4fc71f42b4e140fad18d1

General

Target
2026-07-01_fdc677556f6c47d13375426318f32c0f_elex_wannacry.exe
Size 64KB
Sample260701-nfv1tscv5p
SHA256 4e19bcbcd3b427264609a8b667d0c32cbc1483e8aac4fc71f42b4e140fad18d1
MD5 fdc677556f6c47d13375426318f32c0f
SHA1 0b468cb1556c44f898d586cc85c024acb2f662f6
SHA512 d47a67e2da060dc24e64151c9da317df3a378ea997d9b8b255cdb6d4ae1f8ae2c13a48d75b403ba269c1ae969a0bc59edf0079785d070d169e3bac2012b728c3
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/ui:sLy2Kerc64CiGIm8so28i
TLSH
T161535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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/0x00160000000118e5-4.dat	family_juko
behavioral2/files/0x000f00000001c60f-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
6176	WINWORD.exe
6588	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-1-5-21-1935666426-3801330415-1166019131-1000\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	2026-07-01_fdc677556f6c47d13375426318f32c0f_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
1928	PING.EXE
2188	PING.EXE
5360	PING.EXE
1424	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1928	PING.EXE
2188	PING.EXE
5360	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4196 wrote to memory of 6176	4196	2026-07-01_fdc677556f6c47d13375426318f32c0f_elex_wannacry.exe	89
PID 6176 wrote to memory of 1424	6176	WINWORD.exe	90
PID 1424 wrote to memory of 1928	1424	cmd.exe	92
PID 1424 wrote to memory of 2188	1424	cmd.exe	93
PID 1424 wrote to memory of 5360	1424	cmd.exe	94
PID 1424 wrote to memory of 6588	1424	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-07-01_fdc677556f6c47d13375426318f32c0f_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-01_fdc677556f6c47d13375426318f32c0f_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4196
- 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:6176
- - 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\00006456" 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:1424
  - - 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:1928
  - - 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:2188
  - - 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:5360
  - - 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:6588

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

00006456

Path C:\Users\Admin\AppData\Roaming\Mozilla\00006456
Size 64KB
SHA256 bdd10b55cc66cda9efc333ccddedeacfdb7c7ef593ee7d477e8dc6a98352d4fa
MD5 be7fdb87d51a7de07ec0a64028bb986c
SHA1 cdc01895a71705614158d457d7291363d3c529cd
SHA512 88c5d350dd9d60bd04e017bce82559f7a3df185186c8ba755ce176c06075c64cd9537c783256e46c536eadf5515b66846bd6477618e3baabf996afb110011571
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uV:sLy2Kerc64CiGIm8so28V
TLSH
T12D535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 4e19bcbcd3b427264609a8b667d0c32cbc1483e8aac4fc71f42b4e140fad18d1
MD5 fdc677556f6c47d13375426318f32c0f
SHA1 0b468cb1556c44f898d586cc85c024acb2f662f6
SHA512 d47a67e2da060dc24e64151c9da317df3a378ea997d9b8b255cdb6d4ae1f8ae2c13a48d75b403ba269c1ae969a0bc59edf0079785d070d169e3bac2012b728c3
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/ui:sLy2Kerc64CiGIm8so28i
TLSH
T161535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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