juko | 884a1e237830e420374895264da0d22ac7607c38e83d92d56cb076078a5968b5

General

Target
2026-06-29_3b9b3d25ee97962add56f33ca85b61ef_elex_glassworm_wannacry.exe
Size 194KB
Sample260630-mvb1tsc17s
SHA256 884a1e237830e420374895264da0d22ac7607c38e83d92d56cb076078a5968b5
MD5 3b9b3d25ee97962add56f33ca85b61ef
SHA1 503082e14e681590967ae064261f17973e8a10c6
SHA512 29be706ade68b450ac2c50fdd73c19fd6aa63e8248514f8e6c7c7c642b9a924b0fd4c125c465fa034f91305c6d0aa2a64d851289058de302b93c764846ef7f7e
SSDEEP 3072:8Ly2Kerc64CiGImStfHLREJ5itGNbg5uF1dphh1PBDp9Dwqo/zc/9yH8Ka193eTi:8Ly2Kwc64YIPS5F1hLPBp6qorcbIR5Kx
TLSH
T164147CDAF7623112C45B0A39A7665F189838EC760393651966C0F16C2C7B8B9832FFDC
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 7 IoCs

resource	yara_rule
behavioral2/memory/2868-0-0x0000000000400000-0x0000000000445000-memory.dmp	family_juko
behavioral2/files/0x00170000000115af-5.dat	family_juko
behavioral2/memory/2868-10-0x0000000000400000-0x0000000000445000-memory.dmp	family_juko
behavioral2/memory/4256-12-0x0000000000400000-0x0000000000445000-memory.dmp	family_juko
behavioral2/files/0x000f000000019ca2-13.dat	family_juko
behavioral2/memory/2756-15-0x0000000000400000-0x0000000000445000-memory.dmp	family_juko
behavioral2/memory/2756-16-0x0000000000400000-0x0000000000445000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4256	WINWORD.exe
2756	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-1-5-21-3704578903-1610922810-1098216751-1000\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	2026-06-29_3b9b3d25ee97962add56f33ca85b61ef_elex_glassworm_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
5464	cmd.exe
1540	PING.EXE
3932	PING.EXE
3116	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3932	PING.EXE
3116	PING.EXE
1540	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2868 wrote to memory of 4256	2868	2026-06-29_3b9b3d25ee97962add56f33ca85b61ef_elex_glassworm_wannacry.exe	88
PID 4256 wrote to memory of 5464	4256	WINWORD.exe	89
PID 5464 wrote to memory of 1540	5464	cmd.exe	91
PID 5464 wrote to memory of 3932	5464	cmd.exe	92
PID 5464 wrote to memory of 3116	5464	cmd.exe	93
PID 5464 wrote to memory of 2756	5464	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-06-29_3b9b3d25ee97962add56f33ca85b61ef_elex_glassworm_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-29_3b9b3d25ee97962add56f33ca85b61ef_elex_glassworm_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2868
- 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:4256
- - 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\00003A13" 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:5464
  - - 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:1540
  - - 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:3932
  - - 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:3116
  - - 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:2756

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

00003A13

Path C:\Users\Admin\AppData\Roaming\Mozilla\00003A13
Size 194KB
SHA256 ea59c0e74cc2ea68c19deccf2378b33e359f08bf1412a32043fbe6525682162c
MD5 ae3ad490598bccc05fe39ce1c8a540b8
SHA1 a5585e38bb4c63780f660efadfccb1058c2d9f9d
SHA512 d3f9a103e4d78f05a390ec63e09f5d579454742fc802781a598258be9776620e1ef16a5746a5ad4d521d7dd99acc5e2999fe2b7948aead39310b5e1e86778797
SSDEEP 3072:8Ly2Kerc64CiGImStfHLREJ5itGNbg5uF1dphh1PBDp9Dwqo/zc/9yH8Ka193eTt:8Ly2Kwc64YIPS5F1hLPBp6qorcbIR5K+
TLSH
T19F147CDAF7623112C45B0A39A7665F189838EC760393651966C0F16C2C7B8B9832FFDC
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 194KB
SHA256 884a1e237830e420374895264da0d22ac7607c38e83d92d56cb076078a5968b5
MD5 3b9b3d25ee97962add56f33ca85b61ef
SHA1 503082e14e681590967ae064261f17973e8a10c6
SHA512 29be706ade68b450ac2c50fdd73c19fd6aa63e8248514f8e6c7c7c642b9a924b0fd4c125c465fa034f91305c6d0aa2a64d851289058de302b93c764846ef7f7e
SSDEEP 3072:8Ly2Kerc64CiGImStfHLREJ5itGNbg5uF1dphh1PBDp9Dwqo/zc/9yH8Ka193eTi:8Ly2Kwc64YIPS5F1hLPBp6qorcbIR5Kx
TLSH
T164147CDAF7623112C45B0A39A7665F189838EC760393651966C0F16C2C7B8B9832FFDC
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2756-15-0x0000000000400000-0x0000000000445000-memory.dmp

Download

memory/2756-16-0x0000000000400000-0x0000000000445000-memory.dmp

Download

memory/2868-0-0x0000000000400000-0x0000000000445000-memory.dmp

Download

memory/2868-10-0x0000000000400000-0x0000000000445000-memory.dmp

Download

memory/4256-12-0x0000000000400000-0x0000000000445000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads