juko | dc85ba46a3eedc90b1b7302b637d088c369897e6649bcae99010092cc0d60dcb

General

Target
2026-05-07_de5ab04e76d2ebba9cb28d586573942f_elex_wannacry.exe
Size 88KB
Sample260507-ddxfrset3s
SHA256 dc85ba46a3eedc90b1b7302b637d088c369897e6649bcae99010092cc0d60dcb
MD5 de5ab04e76d2ebba9cb28d586573942f
SHA1 bfa6a1c6df9ee880582809fc28975685b7097458
SHA512 97859b112e81d500f69a88c269cac266383d96344ddff41cf6918d2a3d50155f6166aa74714b56dcc1eb2333620f792e23d345890ccfc01f0f6c1579d805fd8d
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uwzCR3lsl5cN35fWJcedCgVjrsU:sLy2Kerc64CiGIm8so28wzCBlycJWee3
TLSH
T1E3933B2EA5A220FCCA57C170C6BB6B32D4357C251035B63E6344FF352E70E62A729E59
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/0x001c00000002b491-4.dat	family_juko
behavioral2/files/0x001700000002b492-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3068	WINWORD.exe
2792	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-1-5-21-2397528088-2630719772-1129911217-1000\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	2026-05-07_de5ab04e76d2ebba9cb28d586573942f_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
3316	PING.EXE
2896	PING.EXE
1064	PING.EXE
4572	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3316	PING.EXE
2896	PING.EXE
1064	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1044 wrote to memory of 3068	1044	2026-05-07_de5ab04e76d2ebba9cb28d586573942f_elex_wannacry.exe	79
PID 3068 wrote to memory of 4572	3068	WINWORD.exe	80
PID 4572 wrote to memory of 3316	4572	cmd.exe	82
PID 4572 wrote to memory of 2896	4572	cmd.exe	83
PID 4572 wrote to memory of 1064	4572	cmd.exe	84
PID 4572 wrote to memory of 2792	4572	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\2026-05-07_de5ab04e76d2ebba9cb28d586573942f_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-07_de5ab04e76d2ebba9cb28d586573942f_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1044
- 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:3068
- - 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\00007234" 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:4572
  - - 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:3316
  - - 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:2896
  - - 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:1064
  - - 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:2792

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

00007234

Path C:\Users\Admin\AppData\Roaming\Mozilla\00007234
Size 88KB
SHA256 1fc8b244fba79adc66966e67392e7e1fff725c1bebe5afc98d626d4ccea58c44
MD5 83fabe57a1aeebc373c6d938fb39a8ba
SHA1 4c936630c22b07ecbe3e0c97e95ab35158b8498b
SHA512 b7648d27687f770f94fdb4ecd6faf59ccb109ef7184c53ea1bdad405e07ca1a3261da09b9a4e081d42157fa0c3e62d72fc44db88bfe5566653fee67d95205f5e
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uwzCR3lsl5cN35fWJcedCgVjrsy:sLy2Kerc64CiGIm8so28wzCBlycJWeeJ
TLSH
T163933B2EA5A220FCCA57C170C6BB6B32D4357C251035B63E6344FF352E70E62A729E59
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 88KB
SHA256 dc85ba46a3eedc90b1b7302b637d088c369897e6649bcae99010092cc0d60dcb
MD5 de5ab04e76d2ebba9cb28d586573942f
SHA1 bfa6a1c6df9ee880582809fc28975685b7097458
SHA512 97859b112e81d500f69a88c269cac266383d96344ddff41cf6918d2a3d50155f6166aa74714b56dcc1eb2333620f792e23d345890ccfc01f0f6c1579d805fd8d
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uwzCR3lsl5cN35fWJcedCgVjrsU:sLy2Kerc64CiGIm8so28wzCBlycJWee3
TLSH
T1E3933B2EA5A220FCCA57C170C6BB6B32D4357C251035B63E6344FF352E70E62A729E59
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