juko | 1f2a4ffa8c281c32d89bd9869758c7692827cc36b53b7fc6594c21975983bde7

General

Target
2026-10-22_b0c6f792c929d318dce46140331521da_elex_wannacry.exe
Size 148KB
Sample261024-akx44aws4m
SHA256 1f2a4ffa8c281c32d89bd9869758c7692827cc36b53b7fc6594c21975983bde7
MD5 b0c6f792c929d318dce46140331521da
SHA1 52c0b8061e082f15d3751141c57630d03c4fce19
SHA512 ab2e453b2f53b476f953f9670c2ca87dff3a5283b036d6a2742e0333c8db2aca5927956fdaed362dcf629852556e658c0106a2def840c4094485b2502f2b7d5d
SSDEEP 768:GZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHFOm4a4RjF+S7wp5:yLsF2Kerc64sTiX2IV0DpKOmEQkwp5
TLSH
T17DE3A0B629761011C48BD478E9186A60B932CCF53BF75353E3017AAC9AB4C538FDE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution 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/3616-0-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/files/0x0008000000011392-4.dat	family_juko
behavioral2/memory/3616-9-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/memory/5488-12-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/files/0x0006000000016ca8-13.dat	family_juko
behavioral2/memory/4112-16-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral2/memory/4112-17-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5488	WINWORD.exe
4112	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-1-5-21-461973139-3212354679-1508698038-1000\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

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
2320	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	WINWORD.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	WINWORD.exe

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	2026-10-22_b0c6f792c929d318dce46140331521da_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
2320	cmd.exe
5792	PING.EXE
4256	PING.EXE
3860	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4256	PING.EXE
3860	PING.EXE
5792	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3616 wrote to memory of 5488	3616	2026-10-22_b0c6f792c929d318dce46140331521da_elex_wannacry.exe	91
PID 5488 wrote to memory of 2320	5488	WINWORD.exe	92
PID 2320 wrote to memory of 5792	2320	cmd.exe	94
PID 2320 wrote to memory of 4256	2320	cmd.exe	95
PID 2320 wrote to memory of 3860	2320	cmd.exe	96
PID 2320 wrote to memory of 4112	2320	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\2026-10-22_b0c6f792c929d318dce46140331521da_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-22_b0c6f792c929d318dce46140331521da_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3616
- 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:5488
- - 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\0000109E" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:2320
  - - 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:5792
  - - 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:4256
  - - 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:3860
  - - 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
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      PID:4112

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:3048

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

2

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

0000109E

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000109E
Size 148KB
SHA256 d09aa49d7b7824be3e6f80f533a8e90328d0fec9f8d1dbda5adef87f249306d3
MD5 ab2d987f4424c1f8e46dfaf7cbe2797f
SHA1 69ed73ac4ee8bf7fb854298c61a92297541ca0bc
SHA512 32dd659397eb9d3f07765672e598046a50288a739915cf098a4c1a3db836d24415d4112440558ad54477d80b5f24f266d9a7a4a10d54a64c70ec0da43c65ba56
SSDEEP 768:GZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHFOm4a4RjF+S7wpt:yLsF2Kerc64sTiX2IV0DpKOmEQkwpt
TLSH
T1B0E3A0B629761011C48BD478E9186A60B932CCF53BF75353E3017AAC9AB4C538FDE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 148KB
SHA256 1f2a4ffa8c281c32d89bd9869758c7692827cc36b53b7fc6594c21975983bde7
MD5 b0c6f792c929d318dce46140331521da
SHA1 52c0b8061e082f15d3751141c57630d03c4fce19
SHA512 ab2e453b2f53b476f953f9670c2ca87dff3a5283b036d6a2742e0333c8db2aca5927956fdaed362dcf629852556e658c0106a2def840c4094485b2502f2b7d5d
SSDEEP 768:GZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHFOm4a4RjF+S7wp5:yLsF2Kerc64sTiX2IV0DpKOmEQkwp5
TLSH
T17DE3A0B629761011C48BD478E9186A60B932CCF53BF75353E3017AAC9AB4C538FDE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3616-0-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/3616-9-0x0000000000400000-0x0000000000425000-memory.dmp

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memory/4112-16-0x0000000000400000-0x0000000000425000-memory.dmp

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memory/4112-17-0x0000000000400000-0x0000000000425000-memory.dmp

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memory/5488-12-0x0000000000400000-0x0000000000425000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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