juko | 89b2336afad0daaad35ad72084187dacf03f500fa2116976d3db31a45bf028d3

General

Target
2026-06-08_abfe94a7487864bfc8ba1b9142588f14_elex_wannacry.exe
Size 88KB
Sample260608-td8rssht3x
SHA256 89b2336afad0daaad35ad72084187dacf03f500fa2116976d3db31a45bf028d3
MD5 abfe94a7487864bfc8ba1b9142588f14
SHA1 c18fcf0f88386a9db8f4ba33a2a1380a197cb187
SHA512 b8109d99866bac975367647b006a17b1912aef5795f44c6f8f721fcdb1aebd1464498b282ca9ea551ef6c20a2ae57e82f9e0bcec02a0f7643218ebce0eec2e2b
SSDEEP 1536:5LsF2Kerc64sTiX2IV0DVk2Lbuzc/9yH8Ky9193jiT5l364KlVk937tgrF:5Ly2Kerc64CiGImRRLyzc/9yH8Ka193d
TLSH
T1D4934A8F73251205D9770979A2052F19AC3DADE78357A04CA7C4B1693833D3ACB3F6A9
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
behavioral1/files/0x000d00000002428e-4.dat	family_juko
behavioral1/files/0x000800000002429d-12.dat	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-1-5-21-876885714-46325919-1482798410-1000\Control Panel\International\Geo\Nation	WINWORD.exe
Key value queried	\REGISTRY\USER\S-1-5-21-876885714-46325919-1482798410-1000\Control Panel\International\Geo\Nation	2026-06-08_abfe94a7487864bfc8ba1b9142588f14_elex_wannacry.exe

Executes dropped EXE 2 IoCs

pid	Process
4416	WINWORD.exe
4760	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-1-5-21-876885714-46325919-1482798410-1000\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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-06-08_abfe94a7487864bfc8ba1b9142588f14_elex_wannacry.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
4904	cmd.exe
816	PING.EXE
216	PING.EXE
4588	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4588	PING.EXE
816	PING.EXE
216	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4804 wrote to memory of 4416	4804	2026-06-08_abfe94a7487864bfc8ba1b9142588f14_elex_wannacry.exe	91
PID 4416 wrote to memory of 4904	4416	WINWORD.exe	92
PID 4904 wrote to memory of 816	4904	cmd.exe	94
PID 4904 wrote to memory of 216	4904	cmd.exe	95
PID 4904 wrote to memory of 4588	4904	cmd.exe	99
PID 4904 wrote to memory of 4760	4904	cmd.exe	102

C:\Users\Admin\AppData\Local\Temp\2026-06-08_abfe94a7487864bfc8ba1b9142588f14_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-08_abfe94a7487864bfc8ba1b9142588f14_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4804
- 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:4416
- - 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\00004A44" 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:4904
  - - 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:816
  - - 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:216
  - - 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:4588
  - - 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:4760

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

00004A44

Path C:\Users\Admin\AppData\Roaming\Mozilla\00004A44
Size 88KB
SHA256 f06158932f89813ec89fad88bc61b716597a43ee327d729b791a184b0dbd8122
MD5 975d34ec80cbde720d5584d0a07d39d1
SHA1 27ebfb206c6e2a77e864175b24f5220870b6abab
SHA512 165b1c0115bbe800f509f7bc948a2f228e002b5b0a2ec425b9a52a1a30059e6cbb4e07205d3d94da9c8fb847bd7dbc9ddbbe3b3f03c565136c77a2b8d311e735
SSDEEP 1536:5LsF2Kerc64sTiX2IV0DVk2Lbuzc/9yH8Ky9193jiT5l364KlVk937tgr1:5Ly2Kerc64CiGImRRLyzc/9yH8Ka193N
TLSH
T1D6934A8F73251205D9770979A2052F19AC3DADE78357A04CA7C4B1693833D3ACB3F6A9
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 88KB
SHA256 89b2336afad0daaad35ad72084187dacf03f500fa2116976d3db31a45bf028d3
MD5 abfe94a7487864bfc8ba1b9142588f14
SHA1 c18fcf0f88386a9db8f4ba33a2a1380a197cb187
SHA512 b8109d99866bac975367647b006a17b1912aef5795f44c6f8f721fcdb1aebd1464498b282ca9ea551ef6c20a2ae57e82f9e0bcec02a0f7643218ebce0eec2e2b
SSDEEP 1536:5LsF2Kerc64sTiX2IV0DVk2Lbuzc/9yH8Ky9193jiT5l364KlVk937tgrF:5Ly2Kerc64CiGImRRLyzc/9yH8Ka193d
TLSH
T1D4934A8F73251205D9770979A2052F19AC3DADE78357A04CA7C4B1693833D3ACB3F6A9
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