juko | c9754346df55f5c8d5e08a619812bff90d8a33dbb85c3d2b79ac0f1942f8f229

General

Target
2026-06-12_8bc6f3f0b82b4fb8d3c89374044190ce_elex_wannacry.exe
Size 64KB
Sample260612-kc16wshz5x
SHA256 c9754346df55f5c8d5e08a619812bff90d8a33dbb85c3d2b79ac0f1942f8f229
MD5 8bc6f3f0b82b4fb8d3c89374044190ce
SHA1 103987f067e7a1cfabd41ce97678a5d1c6d78cd5
SHA512 c99abf9e25e9b2d4c23a1ad394074ac0b7b36f90131fa2bf852635f7b0b2b74d2c0318729c649a6385fe49385843eee4b3f4fa71a1fe8b2fccb22c41c609d0f2
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uf:sLy2Kerc64CiGIm8so28f
TLSH
T1FA535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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/0x000700000002aa5f-4.dat	family_juko
behavioral2/files/0x001d00000002b376-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
1844	WINWORD.exe
1136	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-1-5-21-1679180529-4058988202-686829476-1000\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	2026-06-12_8bc6f3f0b82b4fb8d3c89374044190ce_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
1012	cmd.exe
4016	PING.EXE
3596	PING.EXE
4912	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3596	PING.EXE
4912	PING.EXE
4016	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4116 wrote to memory of 1844	4116	2026-06-12_8bc6f3f0b82b4fb8d3c89374044190ce_elex_wannacry.exe	82
PID 1844 wrote to memory of 1012	1844	WINWORD.exe	83
PID 1012 wrote to memory of 4016	1012	cmd.exe	85
PID 1012 wrote to memory of 3596	1012	cmd.exe	86
PID 1012 wrote to memory of 4912	1012	cmd.exe	87
PID 1012 wrote to memory of 1136	1012	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\2026-06-12_8bc6f3f0b82b4fb8d3c89374044190ce_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-12_8bc6f3f0b82b4fb8d3c89374044190ce_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4116
- 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:1844
- - 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\0000370B" 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:1012
  - - 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:4016
  - - 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:3596
  - - 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:4912
  - - 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:1136

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

0000370B

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000370B
Size 64KB
SHA256 ac521dcec982a9436a334f1dee4dee3c34f099826272c3f6e7c24b4fb0d0ddcb
MD5 e026fe9588bd8c280fc9bc4f3aab860a
SHA1 6b9a3d86fdf20b93320b502cc6e988655eba558f
SHA512 99f77f3bcdb0d2ffa7093a99990e4c7fd1e4212080dc5d7df077f7635f33b0ec3646f73f790939ffe0631f75661935a9185fac8986c92a74785d84bba006d30a
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uu:sLy2Kerc64CiGIm8so28u
TLSH
T164535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 c9754346df55f5c8d5e08a619812bff90d8a33dbb85c3d2b79ac0f1942f8f229
MD5 8bc6f3f0b82b4fb8d3c89374044190ce
SHA1 103987f067e7a1cfabd41ce97678a5d1c6d78cd5
SHA512 c99abf9e25e9b2d4c23a1ad394074ac0b7b36f90131fa2bf852635f7b0b2b74d2c0318729c649a6385fe49385843eee4b3f4fa71a1fe8b2fccb22c41c609d0f2
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uf:sLy2Kerc64CiGIm8so28f
TLSH
T1FA535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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