juko | 22c7adcfdf02e21f056ea8fd930258211a8020a4ff6526bd719c423cec55b908

General

Target
2026-06-08_a30f57f9d96dd25d511a2ac639c1e08d_elex_wannacry.exe
Size 39KB
Sample260608-k2faqaaz7r
SHA256 22c7adcfdf02e21f056ea8fd930258211a8020a4ff6526bd719c423cec55b908
MD5 a30f57f9d96dd25d511a2ac639c1e08d
SHA1 917937058b7d788acf285709a66ef4b665366c59
SHA512 e36457d74a6d9f933212c7fbd9b3f5ef61e325bdd7c0efa0defae1b1e52ae1b9409703424289f2f9023ef87bf90e1a9f36d8adc68980009469739a5edbfb58df
SSDEEP 768:uZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHV6+UGNSyxSBt:aLsF2Kerc64sTiX2IV0DVyIGFu
TLSH
T1D2036B1B2964B062C69611B0F8696F34C03DADB4052BF052F7447B992CB6DA3CF71ACE
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/2892-0-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/files/0x001f00000002b1ff-5.dat	family_juko
behavioral2/memory/2892-11-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/memory/3236-14-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/files/0x001b00000002b45e-15.dat	family_juko
behavioral2/memory/1816-17-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/memory/1816-18-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3236	WINWORD.exe
1816	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-1-5-21-2824035265-2271499813-2042964211-1000\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	2026-06-08_a30f57f9d96dd25d511a2ac639c1e08d_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
1916	cmd.exe
548	PING.EXE
4588	PING.EXE
2528	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
548	PING.EXE
4588	PING.EXE
2528	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2892 wrote to memory of 3236	2892	2026-06-08_a30f57f9d96dd25d511a2ac639c1e08d_elex_wannacry.exe	83
PID 3236 wrote to memory of 1916	3236	WINWORD.exe	84
PID 1916 wrote to memory of 548	1916	cmd.exe	86
PID 1916 wrote to memory of 4588	1916	cmd.exe	87
PID 1916 wrote to memory of 2528	1916	cmd.exe	88
PID 1916 wrote to memory of 1816	1916	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\2026-06-08_a30f57f9d96dd25d511a2ac639c1e08d_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-08_a30f57f9d96dd25d511a2ac639c1e08d_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2892
- 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:3236
- - 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\00000504" 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:1916
  - - 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:548
  - - 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:\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:2528
  - - 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:1816

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

00000504

Path C:\Users\Admin\AppData\Roaming\Mozilla\00000504
Size 39KB
SHA256 c38bf6007a6ef307763ea80fbb11c484f3f8735ea06c05df56cd5301c1005b57
MD5 cca8a444ca2608f097df4034a6618f47
SHA1 0d08a370dcd5b41492715d52b0a788270c4e45ca
SHA512 5bde941acc9ec319b43a84d786ea58e42a9d8b36a129ab74a8c056fe2c2f092a4ffc1e65656d0d735add8a2e8115bf89ccf746176337415fedce02b3fc6d91ab
SSDEEP 768:uZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHV6+UGNSyxSB7:aLsF2Kerc64sTiX2IV0DVyIGFU
TLSH
T1DB036B1B2964B062C69611B0F8696F34C03DADB4052BF052F7447B992CB6DA3DF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 39KB
SHA256 22c7adcfdf02e21f056ea8fd930258211a8020a4ff6526bd719c423cec55b908
MD5 a30f57f9d96dd25d511a2ac639c1e08d
SHA1 917937058b7d788acf285709a66ef4b665366c59
SHA512 e36457d74a6d9f933212c7fbd9b3f5ef61e325bdd7c0efa0defae1b1e52ae1b9409703424289f2f9023ef87bf90e1a9f36d8adc68980009469739a5edbfb58df
SSDEEP 768:uZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHV6+UGNSyxSBt:aLsF2Kerc64sTiX2IV0DVyIGFu
TLSH
T1D2036B1B2964B062C69611B0F8696F34C03DADB4052BF052F7447B992CB6DA3CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1816-17-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/1816-18-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/2892-0-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/2892-11-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/3236-14-0x0000000000400000-0x000000000041D000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads