juko | 9299fe060a155efeeb763172ba1846e528e287683b4c22dcfbc420d16a5e5530

General

Target
2026-04-16_bdd09e37fa7449bb3645dc1a2b933920_elex_wannacry.exe
Size 88KB
Sample260416-c3scnset7q
SHA256 9299fe060a155efeeb763172ba1846e528e287683b4c22dcfbc420d16a5e5530
MD5 bdd09e37fa7449bb3645dc1a2b933920
SHA1 f689a9365a46ce44ff032a2df270f1360ae3a984
SHA512 64c5204da55e69fff5b36ed4aebff110492616d76d4ccae7e08ea66ae5e2ccb4bde8737c609009bb108efa00ba792373b41e6b3aaa830917daea29dd3000328b
SSDEEP 1536:zLsF2Kerc64sTiX2IV0D7c/wGeP58ORX73iu/uwzCR3lsl5cN35fWJcedCgVjrsX:zLy2Kerc64CiGImHc/28wzCBlycJWeeg
TLSH
T1D2933C2EA59320FCCA5BC170C6BB6732D4357C251035B63E6344FB352E70E62AB29E59
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/1868-0-0x0000000000400000-0x000000000042A000-memory.dmp	family_juko
behavioral2/files/0x001b00000002b331-5.dat	family_juko
behavioral2/memory/1868-12-0x0000000000400000-0x000000000042A000-memory.dmp	family_juko
behavioral2/memory/3668-14-0x0000000000400000-0x000000000042A000-memory.dmp	family_juko
behavioral2/files/0x001b00000002b336-15.dat	family_juko
behavioral2/memory/1652-17-0x0000000000400000-0x000000000042A000-memory.dmp	family_juko
behavioral2/memory/1652-18-0x0000000000400000-0x000000000042A000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3668	WINWORD.exe
1652	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-1-5-21-2122505878-652277452-2375749442-1000\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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-16_bdd09e37fa7449bb3645dc1a2b933920_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

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
3960	PING.EXE
1436	cmd.exe
4320	PING.EXE
3248	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3960	PING.EXE
4320	PING.EXE
3248	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1868 wrote to memory of 3668	1868	2026-04-16_bdd09e37fa7449bb3645dc1a2b933920_elex_wannacry.exe	80
PID 3668 wrote to memory of 1436	3668	WINWORD.exe	81
PID 1436 wrote to memory of 4320	1436	cmd.exe	83
PID 1436 wrote to memory of 3248	1436	cmd.exe	84
PID 1436 wrote to memory of 3960	1436	cmd.exe	85
PID 1436 wrote to memory of 1652	1436	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-04-16_bdd09e37fa7449bb3645dc1a2b933920_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-16_bdd09e37fa7449bb3645dc1a2b933920_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1868
- 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:3668
- - 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\0000783A" 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:1436
  - - 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:4320
  - - 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:3248
  - - 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:3960
  - - 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:1652

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

0000783A

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000783A
Size 88KB
SHA256 94e2f57629cc1d8abb208b68f24ef6b4ae0e1683589449572be4de78a356bf08
MD5 c7f0f3550349a413559ef5b982fb4b1f
SHA1 cb11bcd4e3395776352c4894047e16daebfde36f
SHA512 20b094b19000afca11b1e69ecbbba731663454acb17952d6f319c0b5d3a9c0e2b2ffa614f2b12eb2b61a7b04c7404a763620b90d606f738db808e0df619e2798
SSDEEP 1536:zLsF2Kerc64sTiX2IV0D7c/wGeP58ORX73iu/uwzCR3lsl5cN35fWJcedCgVjrsl:zLy2Kerc64CiGImHc/28wzCBlycJWeei
TLSH
T1A5933C2EA59320FCCA5BC170C6BB6732D4357C251035B63E6344FB352E70E62AB29E59
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 88KB
SHA256 9299fe060a155efeeb763172ba1846e528e287683b4c22dcfbc420d16a5e5530
MD5 bdd09e37fa7449bb3645dc1a2b933920
SHA1 f689a9365a46ce44ff032a2df270f1360ae3a984
SHA512 64c5204da55e69fff5b36ed4aebff110492616d76d4ccae7e08ea66ae5e2ccb4bde8737c609009bb108efa00ba792373b41e6b3aaa830917daea29dd3000328b
SSDEEP 1536:zLsF2Kerc64sTiX2IV0D7c/wGeP58ORX73iu/uwzCR3lsl5cN35fWJcedCgVjrsX:zLy2Kerc64CiGImHc/28wzCBlycJWeeg
TLSH
T1D2933C2EA59320FCCA5BC170C6BB6732D4357C251035B63E6344FB352E70E62AB29E59
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1652-17-0x0000000000400000-0x000000000042A000-memory.dmp

Download

memory/1652-18-0x0000000000400000-0x000000000042A000-memory.dmp

Download

memory/1868-0-0x0000000000400000-0x000000000042A000-memory.dmp

Download

memory/1868-12-0x0000000000400000-0x000000000042A000-memory.dmp

Download

memory/3668-14-0x0000000000400000-0x000000000042A000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads