juko | 0b636c6c5f30401cf000ebdbcc9d6415c5c5f7f9976d137f9dd2f92455762410

General

Target
2026-08-18_48aa43281c1436e70b341d6e08d1f08f_elex_wannacry.exe
Size 64KB
Sample260818-3vm14asgrg
SHA256 0b636c6c5f30401cf000ebdbcc9d6415c5c5f7f9976d137f9dd2f92455762410
MD5 48aa43281c1436e70b341d6e08d1f08f
SHA1 245c530c8d9abecb9b6fbd1a6a14cfd88a384264
SHA512 f6c08b74d9c259115fa795c3d82980a870c951a19919f9f0d63562b50d3672f24ce8676da3d121c1afcbb89b5d3aa50666c19aaefaf88802ca6693a247dd1485
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uf:sLy2Kerc64CiGIm8so28f
TLSH
T148535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution 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/0x000a000000019ca4-4.dat	family_juko
behavioral2/files/0x000e00000001c489-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2160	WINWORD.exe
2928	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-1-5-21-2115213192-531537726-3295841909-1000\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

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
5004	cmd.exe

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	2026-08-18_48aa43281c1436e70b341d6e08d1f08f_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
5560	PING.EXE
5004	cmd.exe
4376	PING.EXE
4880	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4376	PING.EXE
4880	PING.EXE
5560	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 2160	2380	2026-08-18_48aa43281c1436e70b341d6e08d1f08f_elex_wannacry.exe	89
PID 2160 wrote to memory of 5004	2160	WINWORD.exe	90
PID 5004 wrote to memory of 4376	5004	cmd.exe	92
PID 5004 wrote to memory of 4880	5004	cmd.exe	93
PID 5004 wrote to memory of 5560	5004	cmd.exe	94
PID 5004 wrote to memory of 2928	5004	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-18_48aa43281c1436e70b341d6e08d1f08f_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-18_48aa43281c1436e70b341d6e08d1f08f_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2380
- 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:2160
- - 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\00002D29" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:5004
  - - 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:4376
  - - 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:4880
  - - 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:5560
  - - 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:2928

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

00002D29

Path C:\Users\Admin\AppData\Roaming\Mozilla\00002D29
Size 64KB
SHA256 191d48a844db0f8e37e465230febe0c88c7bca65a5865207b3ac98ff9cb1a383
MD5 7cb7da111e25318e5a08225805030593
SHA1 681cf3621244794ad7e15dbc59a8dedf181ee7ba
SHA512 a151b1d715acbcbdce431192d43139bd5438c79b2b271c8fb5186e077344a473ccfd0e7d5c0ef24c95fc1af0b3a44799a7037ab52458208119e24d5516238447
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/ue:sLy2Kerc64CiGIm8so28e
TLSH
T199535C2EA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 0b636c6c5f30401cf000ebdbcc9d6415c5c5f7f9976d137f9dd2f92455762410
MD5 48aa43281c1436e70b341d6e08d1f08f
SHA1 245c530c8d9abecb9b6fbd1a6a14cfd88a384264
SHA512 f6c08b74d9c259115fa795c3d82980a870c951a19919f9f0d63562b50d3672f24ce8676da3d121c1afcbb89b5d3aa50666c19aaefaf88802ca6693a247dd1485
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uf:sLy2Kerc64CiGIm8so28f
TLSH
T148535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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