a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3

General

Target

a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exe
Size

104KB
MD5

14da4aeaacce745c3f8736d4f4d0b8f1
SHA1

8696fe28ac3bf1270c71047444400b78a03df43c
SHA256

a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3
SHA512

ca4056f24b76f135954b4525f46e4af95f781dc8197db9e5acf6b00ae8696e8e8d57f3d07ecc429ad72377c1b7ff23023319ac34e1ff933707387a637a544bd1
SSDEEP

1536:TH53fEEUQ3ZScK43sKeWjwJBAOs9G2HaQNsMj3i6E3j:r53fEEZ3kIsK0IHxN/Oj

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

Processes:

a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exegckauz.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	gckauz.exe

Executes dropped EXE 1 IoCs

Processes:

gckauz.exe

pid process

1828 gckauz.exe

pid	process
1828	gckauz.exe

Loads dropped DLL 2 IoCs

Processes:

a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exe

pid	process
1392	a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exe
1392	a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exe

Adds Run key to start application 2 TTPs 29 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

gckauz.exea349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /k"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /a"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /n"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /q"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /j"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /h"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /u"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /r"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /f"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /z"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /y"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /i"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /y"	a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /w"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /o"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /g"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /s"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /e"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /c"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /p"	gckauz.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /m"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /x"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /b"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /l"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /t"	gckauz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /d"	gckauz.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\	a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\gckauz = "C:\\Users\\Admin\\gckauz.exe /v"	gckauz.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exegckauz.exe

pid	process
1392	a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe
1828	gckauz.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exegckauz.exe

pid process

1392 a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exe
1828 gckauz.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exe

description	pid	process	target process
PID 1392 wrote to memory of 1828	1392	a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exe	gckauz.exe
PID 1392 wrote to memory of 1828	1392	a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exe	gckauz.exe
PID 1392 wrote to memory of 1828	1392	a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exe	gckauz.exe
PID 1392 wrote to memory of 1828	1392	a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exe	gckauz.exe

C:\Users\Admin\AppData\Local\Temp\a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exe
"C:\Users\Admin\AppData\Local\Temp\a349f53aed578ae7411864167382d0fb98a1f40408aead59ce71d4aa60aa96b3.exe"
1⤵
- Modifies visiblity of hidden/system files in Explorer
- Loads dropped DLL
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1392

C:\Users\Admin\gckauz.exe
"C:\Users\Admin\gckauz.exe"
2⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:1828

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

1

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\gckauz.exe

Filesize
104KB

MD5
6e1bb1ca6287295312f208cdae64659d

SHA1
e06e481de9e44c3856a7b248764682286dfd77e6

SHA256
3b44c615316a4ef17d4b7083ef3158c9ff6339511e2ca25e544da0f3464c6777

SHA512
76312a2a530a31334f7a59bad9b27193e9e1d969cacdcd6fd032906b578799239eb7fce2df35dd7e810ad97d6371935535a3f7b1995bb982e279840a6a46cef1

Download Submit
C:\Users\Admin\gckauz.exe

Filesize
104KB

MD5
6e1bb1ca6287295312f208cdae64659d

SHA1
e06e481de9e44c3856a7b248764682286dfd77e6

SHA256
3b44c615316a4ef17d4b7083ef3158c9ff6339511e2ca25e544da0f3464c6777

SHA512
76312a2a530a31334f7a59bad9b27193e9e1d969cacdcd6fd032906b578799239eb7fce2df35dd7e810ad97d6371935535a3f7b1995bb982e279840a6a46cef1

Download Submit
\Users\Admin\gckauz.exe

Filesize
104KB

MD5
6e1bb1ca6287295312f208cdae64659d

SHA1
e06e481de9e44c3856a7b248764682286dfd77e6

SHA256
3b44c615316a4ef17d4b7083ef3158c9ff6339511e2ca25e544da0f3464c6777

SHA512
76312a2a530a31334f7a59bad9b27193e9e1d969cacdcd6fd032906b578799239eb7fce2df35dd7e810ad97d6371935535a3f7b1995bb982e279840a6a46cef1

Download Submit
\Users\Admin\gckauz.exe

Filesize
104KB

MD5
6e1bb1ca6287295312f208cdae64659d

SHA1
e06e481de9e44c3856a7b248764682286dfd77e6

SHA256
3b44c615316a4ef17d4b7083ef3158c9ff6339511e2ca25e544da0f3464c6777

SHA512
76312a2a530a31334f7a59bad9b27193e9e1d969cacdcd6fd032906b578799239eb7fce2df35dd7e810ad97d6371935535a3f7b1995bb982e279840a6a46cef1

Download Submit
memory/1392-56-0x0000000075601000-0x0000000075603000-memory.dmp

Filesize
8KB

Download
memory/1828-59-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads