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
behavioral1/files/0x0003000000022cce-4.dat	family_juko
behavioral1/files/0x00180000000242b3-12.dat	family_juko

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1788976790-1541110888-1636651838-1000\Control Panel\International\Geo\Nation	2026-05-29_3532bab45d2a0ba80a5c5fff21c4dfdf_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1788976790-1541110888-1636651838-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
3552	WINWORD.exe
4716	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-1-5-21-1788976790-1541110888-1636651838-1000\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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.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
4564	cmd.exe
4468	PING.EXE
3804	PING.EXE
4156	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4468	PING.EXE
3804	PING.EXE
4156	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 724 wrote to memory of 3552	724	2026-05-29_3532bab45d2a0ba80a5c5fff21c4dfdf_elex_wannacry.exe	88
PID 3552 wrote to memory of 4564	3552	WINWORD.exe	89
PID 4564 wrote to memory of 4468	4564	cmd.exe	91
PID 4564 wrote to memory of 3804	4564	cmd.exe	92
PID 4564 wrote to memory of 4156	4564	cmd.exe	93
PID 4564 wrote to memory of 4716	4564	cmd.exe	94

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⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:724
- C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
  "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" -r
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3552
- - 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\00003EC8" 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:4564
  - - 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:\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:3804
  - - 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:\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:4716

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

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

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

00003EC8

Path C:\Users\Admin\AppData\Roaming\Mozilla\00003EC8
Size 64KB
SHA256 032f84e39b1e1fd9735d8db3d3f0a8ec3cd0b135335a63e011ff17f79cf7c730
MD5 d863f072a4812761d6c77143472a1f40
SHA1 e1f903997c2b298ca8f65a8c35583e54119f7215
SHA512 c7fd1c0d915deee91b61a4aaeadacac5d502c9176ae5e5a8f139264481670871fe93e58bb0fc5e070a56365d2f188d8b05419be8ea631e7d14599a3497e11f4a
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/ux:sLy2Kerc64CiGIm8so28x
TLSH
T1A1535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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

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Downloads