juko | 2feb1e067f51be1766018570b63c7ec2966d162f665422e2750f37bc36cfe98a

General

Target
2026-06-03_92d5b4aeb4332cef505b8f7bbb7e585b_elex_wannacry.exe
Size 64KB
Sample260603-ea47wahs2s
SHA256 2feb1e067f51be1766018570b63c7ec2966d162f665422e2750f37bc36cfe98a
MD5 92d5b4aeb4332cef505b8f7bbb7e585b
SHA1 58f29ca1ed2961f174070b9bab076f8afcab92df
SHA512 634f46bec77ef30e5e7c73c331ff24b417cb1eb15ed7b9f631a7a64765d49e4266129561bce6942305e228dfe7c7209f50ec3fcdaa64d686801b51ab2234d7f0
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uI:sLy2Kerc64CiGIm8so28I
TLSH
T16A535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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/0x001e00000002b2be-4.dat	family_juko
behavioral2/files/0x001b00000002b5aa-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4656	WINWORD.exe
2824	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-1-5-21-2409539145-3342400454-2096821238-1000\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	2026-06-03_92d5b4aeb4332cef505b8f7bbb7e585b_elex_wannacry.exe
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

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
4156	PING.EXE
1948	PING.EXE
3020	PING.EXE
4392	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1948	PING.EXE
3020	PING.EXE
4156	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3676 wrote to memory of 4656	3676	2026-06-03_92d5b4aeb4332cef505b8f7bbb7e585b_elex_wannacry.exe	80
PID 4656 wrote to memory of 4392	4656	WINWORD.exe	81
PID 4392 wrote to memory of 4156	4392	cmd.exe	83
PID 4392 wrote to memory of 1948	4392	cmd.exe	84
PID 4392 wrote to memory of 3020	4392	cmd.exe	85
PID 4392 wrote to memory of 2824	4392	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-06-03_92d5b4aeb4332cef505b8f7bbb7e585b_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-03_92d5b4aeb4332cef505b8f7bbb7e585b_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3676
- 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:4656
- - 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\00007F48" 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:4392
  - - 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:4156
  - - 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:1948
  - - 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:3020
  - - 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:2824

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

00007F48

Path C:\Users\Admin\AppData\Roaming\Mozilla\00007F48
Size 64KB
SHA256 af496c4f1cb5d48dde29b7494dbc291cda582d3445a764aba4473db9e35b9b13
MD5 80e031bb52e45890f127d21255a9cc05
SHA1 46cd92b99c718e4023400ec8019fa27a6731dc96
SHA512 4255cfd41f61c4d2337421094834ba916f043666ff1af4ba593ee4b7e6b97e321d3bbb69eaf8c91157b006855acde1b42f1a030d0c0fafb424ea1d5221e09cb0
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uc:sLy2Kerc64CiGIm8so28c
TLSH
T143535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 2feb1e067f51be1766018570b63c7ec2966d162f665422e2750f37bc36cfe98a
MD5 92d5b4aeb4332cef505b8f7bbb7e585b
SHA1 58f29ca1ed2961f174070b9bab076f8afcab92df
SHA512 634f46bec77ef30e5e7c73c331ff24b417cb1eb15ed7b9f631a7a64765d49e4266129561bce6942305e228dfe7c7209f50ec3fcdaa64d686801b51ab2234d7f0
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uI:sLy2Kerc64CiGIm8so28I
TLSH
T16A535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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