2eaccf2ffad0c83282b940b5ed1e65f38acacc9e002b48e3bf4f852e1097232a

Analysis

max time kernel
138s
max time network
160s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
17-03-2024 04:49

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General

Target

ransomwares/Huzuni/Huzuni.exe
Size

65KB
MD5

e988915eb5706f5eeea7b684eec41a85
SHA1

05d11b2d393e68af9200fd23eee1ccc0f5850289
SHA256

06b8827fc8494e0e7b284a8dcb704e38169347fb857e4114813a2b8db206ec2c
SHA512

2b8a784fb2333c1b2313eb557dd0bc551403ff0ce9be5422241e5274ae2028487f1a4386fb098cb93bcb633cdefedc8bade80501ac919248455d53c974ab3e22
SSDEEP

1536:rmFEdOkJa9HLSQyzboPGRyfbYPstUKEMzL0HPV1vsHTV1:zwpi/5yFuKEM30HP7vsHT7

Score

10^/10

evasion persistence ransomware spyware stealer

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs
persistence

Winlogon Helper DLL
T1547.004

Modify Registry
T1112

Processes:

Huzuni.exe

description ioc process

Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "empty" Huzuni.exe
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1070.004

Inhibit System Recovery
T1490

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "empty"	Huzuni.exe

Disables RegEdit via registry modification 1 IoCs

evasion

Processes:

Huzuni.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	Huzuni.exe

Disables Task Manager via registry modification
evasion

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

Processes:

Huzuni.exeHuzuni.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	Huzuni.exe
Key value queried	\REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	Huzuni.exe

Executes dropped EXE 1 IoCs

Processes:

Huzuni.exe

pid process

1572 Huzuni.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Drops desktop.ini file(s) 1 IoCs

Processes:

Huzuni.exe

description ioc process

File created C:\Users\Admin\Pictures\Camera Roll\desktop.ini Huzuni.exe

description	ioc	process
File created	C:\Users\Admin\Pictures\Camera Roll\desktop.ini	Huzuni.exe

Enumerates connected drives 3 TTPs 16 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

vssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exe

description	ioc	process
File opened (read-only)	\??\e:	vssadmin.exe
File opened (read-only)	\??\E:	vssadmin.exe
File opened (read-only)	\??\G:	vssadmin.exe
File opened (read-only)	\??\H:	vssadmin.exe
File opened (read-only)	\??\E:	vssadmin.exe
File opened (read-only)	\??\F:	vssadmin.exe
File opened (read-only)	\??\g:	vssadmin.exe
File opened (read-only)	\??\h:	vssadmin.exe
File opened (read-only)	\??\h:	vssadmin.exe
File opened (read-only)	\??\e:	vssadmin.exe
File opened (read-only)	\??\G:	vssadmin.exe
File opened (read-only)	\??\H:	vssadmin.exe
File opened (read-only)	\??\D:	vssadmin.exe
File opened (read-only)	\??\D:	vssadmin.exe
File opened (read-only)	\??\F:	vssadmin.exe
File opened (read-only)	\??\g:	vssadmin.exe

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

System Information Discovery
T1082

Interacts with shadow copies 2 TTPs 14 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

Processes:

vssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exe

pid	process
4400	vssadmin.exe
1588	vssadmin.exe
4116	vssadmin.exe
1528	vssadmin.exe
4100	vssadmin.exe
3096	vssadmin.exe
660	vssadmin.exe
4032	vssadmin.exe
4212	vssadmin.exe
4048	vssadmin.exe
5116	vssadmin.exe
2784	vssadmin.exe
5044	vssadmin.exe
4936	vssadmin.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

Huzuni.exe

pid	process
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe
1572	Huzuni.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

vssvc.exeHuzuni.exe

description	pid	process
Token: SeBackupPrivilege	3984	vssvc.exe
Token: SeRestorePrivilege	3984	vssvc.exe
Token: SeAuditPrivilege	3984	vssvc.exe
Token: SeDebugPrivilege	1572	Huzuni.exe

Suspicious use of WriteProcessMemory 34 IoCs

Processes:

Huzuni.execmd.exeHuzuni.exe

description	pid	process	target process
PID 332 wrote to memory of 1572	332	Huzuni.exe	Huzuni.exe
PID 332 wrote to memory of 1572	332	Huzuni.exe	Huzuni.exe
PID 332 wrote to memory of 3588	332	Huzuni.exe	cmd.exe
PID 332 wrote to memory of 3588	332	Huzuni.exe	cmd.exe
PID 3588 wrote to memory of 5044	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 5044	3588	cmd.exe	vssadmin.exe
PID 1572 wrote to memory of 932	1572	Huzuni.exe	cmd.exe
PID 1572 wrote to memory of 932	1572	Huzuni.exe	cmd.exe
PID 3588 wrote to memory of 4936	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 4936	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 1588	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 1588	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 4100	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 4100	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 3096	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 3096	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 4048	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 4048	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 5116	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 5116	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 1528	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 1528	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 660	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 660	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 4116	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 4116	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 4032	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 4032	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 4400	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 4400	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 4212	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 4212	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 2784	3588	cmd.exe	vssadmin.exe
PID 3588 wrote to memory of 2784	3588	cmd.exe	vssadmin.exe

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\ransomwares\Huzuni\Huzuni.exe
"C:\Users\Admin\AppData\Local\Temp\ransomwares\Huzuni\Huzuni.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:332

C:\Huzuni.exe
"C:\Huzuni.exe"
2⤵
- Modifies WinLogon for persistence
- Disables RegEdit via registry modification
- Checks computer location settings
- Executes dropped EXE
- Drops desktop.ini file(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1572

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /takeown /f C:\Windows\System32\Taskmgr.exe && icacls C:\Windows\System32\Taskmgr.exe /grant %username%:F && del C:\Windows\System32\Taskmgr.exe && exit
3⤵
PID:932

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\window.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:3588

C:\Windows\system32\vssadmin.exe
vssadmin Delete shadows /all /quiet
3⤵
- Interacts with shadow copies
PID:5044

C:\Windows\system32\vssadmin.exe
vssadmin resize shadowstorage /for=c: /on=c: /maxsize=401MB
3⤵
- Interacts with shadow copies
PID:4936

C:\Windows\system32\vssadmin.exe
vssadmin resize shadowstorage /for=c: /on=c: /maxsize=unbounded
3⤵
- Interacts with shadow copies
PID:1588

C:\Windows\system32\vssadmin.exe
vssadmin resize shadowstorage /for=c: /on=d: /maxsize=401MB
3⤵
- Enumerates connected drives
- Interacts with shadow copies
PID:4100

C:\Windows\system32\vssadmin.exe
vssadmin resize shadowstorage /for=c: /on=d: /maxsize=unbounded
3⤵
- Enumerates connected drives
- Interacts with shadow copies
PID:3096

C:\Windows\system32\vssadmin.exe
vssadmin resize shadowstorage /for=c: /on=e: /maxsize=401MB
3⤵
- Enumerates connected drives
- Interacts with shadow copies
PID:4048

C:\Windows\system32\vssadmin.exe
vssadmin resize shadowstorage /for=c: /on=e: /maxsize=unbounded
3⤵
- Enumerates connected drives
- Interacts with shadow copies
PID:5116

C:\Windows\system32\vssadmin.exe
vssadmin resize shadowstorage /for=c: /on=f: /maxsize=401MB
3⤵
- Enumerates connected drives
- Interacts with shadow copies
PID:1528

C:\Windows\system32\vssadmin.exe
vssadmin resize shadowstorage /for=c: /on=f: /maxsize=unbounded
3⤵
- Enumerates connected drives
- Interacts with shadow copies
PID:660

C:\Windows\system32\vssadmin.exe
vssadmin resize shadowstorage /for=c: /on=g: /maxsize=401MB
3⤵
- Enumerates connected drives
- Interacts with shadow copies
PID:4116

C:\Windows\system32\vssadmin.exe
vssadmin resize shadowstorage /for=c: /on=g: /maxsize=unbounded
3⤵
- Enumerates connected drives
- Interacts with shadow copies
PID:4032

C:\Windows\system32\vssadmin.exe
vssadmin resize shadowstorage /for=c: /on=h: /maxsize=401MB
3⤵
- Enumerates connected drives
- Interacts with shadow copies
PID:4400

C:\Windows\system32\vssadmin.exe
vssadmin resize shadowstorage /for=c: /on=h: /maxsize=unbounded
3⤵
- Enumerates connected drives
- Interacts with shadow copies
PID:4212

C:\Windows\system32\vssadmin.exe
vssadmin Delete shadows /all /quiet
3⤵
- Interacts with shadow copies
PID:2784

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3984

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Indicator Removal

T1070

File Deletion

T1070.004

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Peripheral Device Discovery

T1120

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Inhibit System Recovery

T1490

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Huzuni.exe
Filesize
52KB

MD5
ea9c5fca65378fe641a1b708187a582f

SHA1
c7dba2587ffd02071fe12fdec646d70cf86d7f9e

SHA256
0ce2f58a1b2c0d87c054ef212914d84ffeac59243b4a8a3a9c615c876638d87d

SHA512
1006b532ad2df8532be3fe651d24908e0b83240bf5af4ef52ba6341d56eac93fc35d75ae499b0f473354e3fc100d629a22daae206e4d05124842135559ca64ec

Download Submit
C:\window.bat
Filesize
1KB

MD5
9dba906094ee0f15f38e0640e5923270

SHA1
0118a885480cd04c5a4310fd3d39251dd769a3a5

SHA256
0e79efbeae919d458e637000c20e4e71ddb916903527c593248038a78358f57d

SHA512
e6985edc821486ce4ef0f467f348734ccab4aa1bacf961c4168de4e881960954a2c2c503824c9cc9f639ad9fff2e2df79241a75bf84cae99028082bdceee28e9

Download Submit
memory/332-1-0x00007FF841030000-0x00007FF841AF1000-memory.dmp

Filesize
10.8MB

Download
memory/332-2-0x0000000002940000-0x0000000002950000-memory.dmp

Filesize
64KB

Download
memory/332-0-0x0000000000790000-0x00000000007A6000-memory.dmp

Filesize
88KB

Download
memory/332-23-0x00007FF841030000-0x00007FF841AF1000-memory.dmp

Filesize
10.8MB

Download
memory/1572-16-0x0000000000D40000-0x0000000000D52000-memory.dmp

Filesize
72KB

Download
memory/1572-21-0x000000001BAA0000-0x000000001BAB0000-memory.dmp

Filesize
64KB

Download
memory/1572-19-0x0000000001600000-0x0000000001606000-memory.dmp

Filesize
24KB

Download
memory/1572-17-0x00007FF841030000-0x00007FF841AF1000-memory.dmp

Filesize
10.8MB

Download
memory/1572-24-0x000000001BAA0000-0x000000001BAB0000-memory.dmp

Filesize
64KB

Download
memory/1572-25-0x000000001BAA0000-0x000000001BAB0000-memory.dmp

Filesize
64KB

Download
memory/1572-114-0x000000001BAA0000-0x000000001BAB0000-memory.dmp

Filesize
64KB

Download
memory/1572-115-0x00007FF841030000-0x00007FF841AF1000-memory.dmp

Filesize
10.8MB

Download
memory/1572-116-0x000000001BAA0000-0x000000001BAB0000-memory.dmp

Filesize
64KB

Download
memory/1572-117-0x000000001BAA0000-0x000000001BAB0000-memory.dmp

Filesize
64KB

Download
memory/1572-118-0x000000001BAA0000-0x000000001BAB0000-memory.dmp

Filesize
64KB

Download