juko | 60bd8e03d7dec9a0a89513d74f4963301054abd47cf538ea2fa012734017a5aa

General

Target
2026-04-22_a363dea4dbf8d599d6196d30f8ee4293_elex_wannacry.exe
Size 57KB
Sample260422-dsvwgsbz21
SHA256 60bd8e03d7dec9a0a89513d74f4963301054abd47cf538ea2fa012734017a5aa
MD5 a363dea4dbf8d599d6196d30f8ee4293
SHA1 62633993dd68d142a304c0c0c09d2c10412ac376
SHA512 22e1b15eda08f54761ba66e39bfb056437e1a2d5f526e3618bd4996b7754e9c524f9318304c2d0fb1296afa27fd339a3c2586dc32ffa48dfdd1e9e69af760c0e
SSDEEP 1536:qLsF2Kerc64sTiX2IV0DYlNpyyCwlAY0VdTQI:qLy2Kerc64CiGImklNUyp8Tz
TLSH
T1FF433C16B950B072D99220B06A6D6B36417A9DF10317A1D3E7407ADD68F2FD2EF306CE
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
behavioral1/memory/4752-0-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral1/files/0x000a000000021698-5.dat	family_juko
behavioral1/memory/4752-12-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral1/memory/2244-14-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral1/files/0x000300000002315a-15.dat	family_juko
behavioral1/memory/5004-17-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral1/memory/5004-18-0x0000000000400000-0x0000000000422000-memory.dmp	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-1-5-21-1609746302-1884177235-1125644204-1000\Control Panel\International\Geo\Nation	2026-04-22_a363dea4dbf8d599d6196d30f8ee4293_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1609746302-1884177235-1125644204-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
2244	WINWORD.exe
5004	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-1-5-21-1609746302-1884177235-1125644204-1000\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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-22_a363dea4dbf8d599d6196d30f8ee4293_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

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
4808	cmd.exe
4112	PING.EXE
4920	PING.EXE
4816	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4920	PING.EXE
4816	PING.EXE
4112	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4752 wrote to memory of 2244	4752	2026-04-22_a363dea4dbf8d599d6196d30f8ee4293_elex_wannacry.exe	84
PID 2244 wrote to memory of 4808	2244	WINWORD.exe	85
PID 4808 wrote to memory of 4112	4808	cmd.exe	87
PID 4808 wrote to memory of 4920	4808	cmd.exe	88
PID 4808 wrote to memory of 4816	4808	cmd.exe	89
PID 4808 wrote to memory of 5004	4808	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\2026-04-22_a363dea4dbf8d599d6196d30f8ee4293_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-22_a363dea4dbf8d599d6196d30f8ee4293_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4752
- 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:2244
- - 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\00002579" 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:4808
  - - 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:4112
  - - 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:4920
  - - 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:4816
  - - 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:5004

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

00002579

Path C:\Users\Admin\AppData\Roaming\Mozilla\00002579
Size 57KB
SHA256 3108db3f8c11cef973ad5a5ca7e016e9ea3828b435e3b3cecdb722a84a20d10a
MD5 c64f6732669c40ae352b827035dd4dbf
SHA1 a85ec5435e8f31476e34243baf77f786e7ed5ab8
SHA512 6dbc0a0c04f96b24d12a82f50d1db2cd505c2502b0832181d14134e05b4d8a304c152e40ab5d01d8f9f47816e4bf6c702bc7600c1b8c6a5af1eae25d424d4dd0
SSDEEP 1536:qLsF2Kerc64sTiX2IV0DYlNpyyCwlAY0VdTQs:qLy2Kerc64CiGImklNUyp8TX
TLSH
T121433C16B950B072D95220B06A6D6B36417A9DF10317A1D3E7407ADD68F2FD2EF306CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 57KB
SHA256 60bd8e03d7dec9a0a89513d74f4963301054abd47cf538ea2fa012734017a5aa
MD5 a363dea4dbf8d599d6196d30f8ee4293
SHA1 62633993dd68d142a304c0c0c09d2c10412ac376
SHA512 22e1b15eda08f54761ba66e39bfb056437e1a2d5f526e3618bd4996b7754e9c524f9318304c2d0fb1296afa27fd339a3c2586dc32ffa48dfdd1e9e69af760c0e
SSDEEP 1536:qLsF2Kerc64sTiX2IV0DYlNpyyCwlAY0VdTQI:qLy2Kerc64CiGImklNUyp8Tz
TLSH
T1FF433C16B950B072D99220B06A6D6B36417A9DF10317A1D3E7407ADD68F2FD2EF306CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2244-14-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/4752-0-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/4752-12-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/5004-17-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/5004-18-0x0000000000400000-0x0000000000422000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads