juko | 10af01aee06457e06e63c5a5a6fde7f10d7a02c8c8d98c8a3474f2807634a3b8

General

Target
2026-05-29_3532bab45d2a0ba80a5c5fff21c4dfdf_elex_wannacry.exe
Size 64KB
Sample260529-2dx93abs21
SHA256 10af01aee06457e06e63c5a5a6fde7f10d7a02c8c8d98c8a3474f2807634a3b8
MD5 3532bab45d2a0ba80a5c5fff21c4dfdf
SHA1 68cceb72a3381177c4930d5e98ed5f7b5edf039e
SHA512 a55d87a77fed7a26ecd7aa5e2e59a9da15bd6b95e48449abde2236815af2cb93c90aa6f13b095c024fa6e02c869a91363b58dea3d67aaa4a79af7684163e927d
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uK:sLy2Kerc64CiGIm8so28K
TLSH
T19A536C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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/0x001e00000002b416-4.dat	family_juko
behavioral2/files/0x001b00000002b61d-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4092	WINWORD.exe
2804	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-1-5-21-2824035265-2271499813-2042964211-1000\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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-29_3532bab45d2a0ba80a5c5fff21c4dfdf_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

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
4664	PING.EXE
4848	cmd.exe
3924	PING.EXE
4760	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4760	PING.EXE
4664	PING.EXE
3924	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4796 wrote to memory of 4092	4796	2026-05-29_3532bab45d2a0ba80a5c5fff21c4dfdf_elex_wannacry.exe	83
PID 4092 wrote to memory of 4848	4092	WINWORD.exe	84
PID 4848 wrote to memory of 3924	4848	cmd.exe	86
PID 4848 wrote to memory of 4760	4848	cmd.exe	87
PID 4848 wrote to memory of 4664	4848	cmd.exe	88
PID 4848 wrote to memory of 2804	4848	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\2026-05-29_3532bab45d2a0ba80a5c5fff21c4dfdf_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-29_3532bab45d2a0ba80a5c5fff21c4dfdf_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4796
- 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:4092
- - 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\00004E03" 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:4848
  - - 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:3924
  - - 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:4760
  - - 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:4664
  - - 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:2804

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

Replay Monitor

Loading Replay Monitor...

Downloads

00004E03

Path C:\Users\Admin\AppData\Roaming\Mozilla\00004E03
Size 64KB
SHA256 7cd695750a96a7b6ad5536595058c6d6e2d3b16ac25e3713c22c922b5fbab7bd
MD5 fff95f86a6ec262438c84d95e01bc7f7
SHA1 8cc758bd377ed8cceef31d8ab03b990d11e0eecd
SHA512 c942f32569c27452023b5b9409d12e4e7ed61e375c2818be89b711b3445fcfbc76175998609cd09e4699bf2cb962231f19e1c22d0f5be2b5a05d7bfac5bdac0e
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uA:sLy2Kerc64CiGIm8so28A
TLSH
T1DB535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 10af01aee06457e06e63c5a5a6fde7f10d7a02c8c8d98c8a3474f2807634a3b8
MD5 3532bab45d2a0ba80a5c5fff21c4dfdf
SHA1 68cceb72a3381177c4930d5e98ed5f7b5edf039e
SHA512 a55d87a77fed7a26ecd7aa5e2e59a9da15bd6b95e48449abde2236815af2cb93c90aa6f13b095c024fa6e02c869a91363b58dea3d67aaa4a79af7684163e927d
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uK:sLy2Kerc64CiGIm8so28K
TLSH
T19A536C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads