b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62

Analysis

max time kernel
143s
max time network
149s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
11/10/2022, 20:37

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General

Target

b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe
Size

204KB
MD5

76c4d6909ca21be1d9ae629cc24403f0
SHA1

003e69ff66d67e8c1330b0785fa23bca47596f4e
SHA256

b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62
SHA512

e12927f0756e4b2bd3a78c6fe1bd7293c940f40becf1162861242e26c30a40953b3a33e07245a1f9ef74a5555ed7355f0a2ffaddb5465ee74099435f9034251f
SSDEEP

6144:Py2/1047hwTQUlnHRNcggTE6F3PFVvNqActoR:X/1p7hwTNnHRNcggTE6F3PFVvNute

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

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	zoikub.exe

Executes dropped EXE 1 IoCs

pid	Process
932	zoikub.exe

Loads dropped DLL 2 IoCs

pid	Process
1080	b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe
1080	b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe

Adds Run key to start application 2 TTPs 11 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\zoikub = "C:\\Users\\Admin\\zoikub.exe /b"	zoikub.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\zoikub = "C:\\Users\\Admin\\zoikub.exe /f"	zoikub.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\zoikub = "C:\\Users\\Admin\\zoikub.exe /y"	zoikub.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\zoikub = "C:\\Users\\Admin\\zoikub.exe /p"	zoikub.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\	b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\zoikub = "C:\\Users\\Admin\\zoikub.exe /a"	b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\	zoikub.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\zoikub = "C:\\Users\\Admin\\zoikub.exe /s"	zoikub.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\zoikub = "C:\\Users\\Admin\\zoikub.exe /z"	zoikub.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\zoikub = "C:\\Users\\Admin\\zoikub.exe /v"	zoikub.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\zoikub = "C:\\Users\\Admin\\zoikub.exe /a"	zoikub.exe

Maps connected drives based on registry 3 TTPs 4 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	zoikub.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	zoikub.exe

Drops autorun.inf file 1 TTPs 1 IoCs

Malware can abuse Windows Autorun to spread further via attached volumes.

Replication Through Removable Media

T1091

description	ioc	Process
File opened for modification	C:\Users\Admin\c\autorun.inf	zoikub.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 60 IoCs

pid	Process
1080	b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe
1080	b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe
1080	b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe
1080	b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe
932	zoikub.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1080	b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe
932	zoikub.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1080 wrote to memory of 932	1080	b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe	28
PID 1080 wrote to memory of 932	1080	b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe	28
PID 1080 wrote to memory of 932	1080	b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe	28
PID 1080 wrote to memory of 932	1080	b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe	28

C:\Users\Admin\AppData\Local\Temp\b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe
"C:\Users\Admin\AppData\Local\Temp\b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62.exe"
1⤵
- Modifies visiblity of hidden/system files in Explorer
- Loads dropped DLL
- Adds Run key to start application
- Maps connected drives based on registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1080
- C:\Users\Admin\zoikub.exe
  "C:\Users\Admin\zoikub.exe"
  2⤵
  - Modifies visiblity of hidden/system files in Explorer
  - Executes dropped EXE
  - Adds Run key to start application
  - Maps connected drives based on registry
  - Drops autorun.inf file
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:932

Network

MITRE ATT&CK Enterprise v6

Initial Access

Replication Through Removable Media

T1091

Execution

Persistence

Hidden Files and Directories

T1158

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Replication Through Removable Media

T1091

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\zoikub.exe

Filesize
204KB

MD5
76c4d6909ca21be1d9ae629cc24403f0

SHA1
003e69ff66d67e8c1330b0785fa23bca47596f4e

SHA256
b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62

SHA512
e12927f0756e4b2bd3a78c6fe1bd7293c940f40becf1162861242e26c30a40953b3a33e07245a1f9ef74a5555ed7355f0a2ffaddb5465ee74099435f9034251f

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

Filesize
204KB

MD5
76c4d6909ca21be1d9ae629cc24403f0

SHA1
003e69ff66d67e8c1330b0785fa23bca47596f4e

SHA256
b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62

SHA512
e12927f0756e4b2bd3a78c6fe1bd7293c940f40becf1162861242e26c30a40953b3a33e07245a1f9ef74a5555ed7355f0a2ffaddb5465ee74099435f9034251f

Download Submit
\Users\Admin\zoikub.exe

Filesize
204KB

MD5
76c4d6909ca21be1d9ae629cc24403f0

SHA1
003e69ff66d67e8c1330b0785fa23bca47596f4e

SHA256
b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62

SHA512
e12927f0756e4b2bd3a78c6fe1bd7293c940f40becf1162861242e26c30a40953b3a33e07245a1f9ef74a5555ed7355f0a2ffaddb5465ee74099435f9034251f

Download Submit
\Users\Admin\zoikub.exe

Filesize
204KB

MD5
76c4d6909ca21be1d9ae629cc24403f0

SHA1
003e69ff66d67e8c1330b0785fa23bca47596f4e

SHA256
b808910fd5140c603168e4db53d17fe2e23e28d49a5e0deb86971046a1277f62

SHA512
e12927f0756e4b2bd3a78c6fe1bd7293c940f40becf1162861242e26c30a40953b3a33e07245a1f9ef74a5555ed7355f0a2ffaddb5465ee74099435f9034251f

Download Submit
memory/1080-56-0x0000000076411000-0x0000000076413000-memory.dmp

Filesize
8KB

Download