juko | 67d08da4023beef715611a19b06d86ef39639dd49f6456765c18d6293032a81c

General

Target
2026-07-09_ebe477fa19eae355c4cc129789afa0ac_elex_wannacry.exe
Size 68KB
Sample260709-jncf8se151
SHA256 67d08da4023beef715611a19b06d86ef39639dd49f6456765c18d6293032a81c
MD5 ebe477fa19eae355c4cc129789afa0ac
SHA1 f6a3d2e332373e25cca85773fe5846f4542e748f
SHA512 bd9447f24dfa9a7e02406edba2f3f2d6c19ced3f9fb72d00efa1796fa5d545020180affe38089bebcba800b6ff01ee0ea7e0374cd87efa3aeb6e22ecc6a2fb38
SSDEEP 768:4ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHd2LGm4a4RjF+S7wpo:0LsF2Kerc64sTiX2IV0DVk2LGmEQkwpo
TLSH
T14F63A0B629761011C48BD478E8186A60B933CCF53BF75753E3017AA89AB4D538FDE8C6
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/3964-0-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral1/files/0x0015000000024368-5.dat	family_juko
behavioral1/memory/3964-11-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral1/memory/5008-14-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral1/files/0x000900000002458d-15.dat	family_juko
behavioral1/memory/2280-17-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral1/memory/2280-18-0x0000000000400000-0x0000000000425000-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-1-5-21-2370214745-1838013427-2987045292-1000\Control Panel\International\Geo\Nation	2026-07-09_ebe477fa19eae355c4cc129789afa0ac_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2370214745-1838013427-2987045292-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
5008	WINWORD.exe
2280	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-1-5-21-2370214745-1838013427-2987045292-1000\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	2026-07-09_ebe477fa19eae355c4cc129789afa0ac_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
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
2512	cmd.exe
1072	PING.EXE
4380	PING.EXE
4580	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4580	PING.EXE
1072	PING.EXE
4380	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3964 wrote to memory of 5008	3964	2026-07-09_ebe477fa19eae355c4cc129789afa0ac_elex_wannacry.exe	85
PID 5008 wrote to memory of 2512	5008	WINWORD.exe	86
PID 2512 wrote to memory of 1072	2512	cmd.exe	88
PID 2512 wrote to memory of 4380	2512	cmd.exe	89
PID 2512 wrote to memory of 4580	2512	cmd.exe	92
PID 2512 wrote to memory of 2280	2512	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-07-09_ebe477fa19eae355c4cc129789afa0ac_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-09_ebe477fa19eae355c4cc129789afa0ac_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3964
- 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:5008
- - 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\00007DF7" 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:2512
  - - 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:1072
  - - 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:4380
  - - 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:4580
  - - 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:2280

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

00007DF7

Path C:\Users\Admin\AppData\Roaming\Mozilla\00007DF7
Size 68KB
SHA256 9d7401deaa794f8fcd46488cf92270b92964630c7e4539f417d402371d019b4a
MD5 b544908eedef8dfad450098ea3ee628e
SHA1 1158f52e20b5f36d0e87c33087d48e3a64401933
SHA512 30a1bd91ae7930b38105a00aec053d79f405ebc66cd6b46f314bba74cf68fdbb08bee3ad234018dc978ff12f8107c65c3fdc79b3ca589fd401049289b6235d1c
SSDEEP 768:4ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHd2LGm4a4RjF+S7wpe:0LsF2Kerc64sTiX2IV0DVk2LGmEQkwpe
TLSH
T1C263A0B629761011C48BD478E8186A60B933CCF53BF75753E3017AA89AB4D138FDE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 68KB
SHA256 67d08da4023beef715611a19b06d86ef39639dd49f6456765c18d6293032a81c
MD5 ebe477fa19eae355c4cc129789afa0ac
SHA1 f6a3d2e332373e25cca85773fe5846f4542e748f
SHA512 bd9447f24dfa9a7e02406edba2f3f2d6c19ced3f9fb72d00efa1796fa5d545020180affe38089bebcba800b6ff01ee0ea7e0374cd87efa3aeb6e22ecc6a2fb38
SSDEEP 768:4ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHd2LGm4a4RjF+S7wpo:0LsF2Kerc64sTiX2IV0DVk2LGmEQkwpo
TLSH
T14F63A0B629761011C48BD478E8186A60B933CCF53BF75753E3017AA89AB4D538FDE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2280-17-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/2280-18-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/3964-0-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/3964-11-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/5008-14-0x0000000000400000-0x0000000000425000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads