2eaccf2ffad0c83282b940b5ed1e65f38acacc9e002b48e3bf4f852e1097232a

Analysis

max time kernel
187s
max time network
129s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
15-03-2024 21:38

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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-1-5-21-406356229-2805545415-1236085040-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	Huzuni.exe

Disables Task Manager via registry modification
evasion
Executes dropped EXE 1 IoCs

Processes:

Huzuni.exe

pid process

2524 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

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)	\??\e:	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)	\??\D:	vssadmin.exe
File opened (read-only)	\??\D:	vssadmin.exe
File opened (read-only)	\??\G:	vssadmin.exe
File opened (read-only)	\??\H:	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)	\??\E:	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
1452	vssadmin.exe
2188	vssadmin.exe
2380	vssadmin.exe
2112	vssadmin.exe
1056	vssadmin.exe
1692	vssadmin.exe
1168	vssadmin.exe
2088	vssadmin.exe
2012	vssadmin.exe
1624	vssadmin.exe
580	vssadmin.exe
344	vssadmin.exe
1160	vssadmin.exe
1736	vssadmin.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

Huzuni.exe

pid	process
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe
2524	Huzuni.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

vssvc.exeHuzuni.exe

description	pid	process
Token: SeBackupPrivilege	2752	vssvc.exe
Token: SeRestorePrivilege	2752	vssvc.exe
Token: SeAuditPrivilege	2752	vssvc.exe
Token: SeDebugPrivilege	2524	Huzuni.exe

Suspicious use of WriteProcessMemory 51 IoCs

Processes:

Huzuni.execmd.exeHuzuni.exe

description	pid	process	target process
PID 2700 wrote to memory of 2524	2700	Huzuni.exe	Huzuni.exe
PID 2700 wrote to memory of 2524	2700	Huzuni.exe	Huzuni.exe
PID 2700 wrote to memory of 2524	2700	Huzuni.exe	Huzuni.exe
PID 2700 wrote to memory of 2532	2700	Huzuni.exe	cmd.exe
PID 2700 wrote to memory of 2532	2700	Huzuni.exe	cmd.exe
PID 2700 wrote to memory of 2532	2700	Huzuni.exe	cmd.exe
PID 2532 wrote to memory of 2012	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 2012	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 2012	2532	cmd.exe	vssadmin.exe
PID 2524 wrote to memory of 2744	2524	Huzuni.exe	cmd.exe
PID 2524 wrote to memory of 2744	2524	Huzuni.exe	cmd.exe
PID 2524 wrote to memory of 2744	2524	Huzuni.exe	cmd.exe
PID 2532 wrote to memory of 1452	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1452	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1452	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 2112	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 2112	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 2112	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1056	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1056	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1056	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 344	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 344	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 344	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1692	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1692	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1692	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1624	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1624	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1624	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1168	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1168	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1168	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1160	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1160	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1160	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 2088	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 2088	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 2088	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 2188	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 2188	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 2188	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 580	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 580	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 580	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1736	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1736	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 1736	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 2380	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 2380	2532	cmd.exe	vssadmin.exe
PID 2532 wrote to memory of 2380	2532	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⤵
- Suspicious use of WriteProcessMemory
PID:2700
- C:\Huzuni.exe
  "C:\Huzuni.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Disables RegEdit via registry modification
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2524
- - 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:2744
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\window.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2532
- - C:\Windows\system32\vssadmin.exe
    vssadmin Delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:2012
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=c: /on=c: /maxsize=401MB
    3⤵
    - Interacts with shadow copies
    PID:1452
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=c: /on=c: /maxsize=unbounded
    3⤵
    - Interacts with shadow copies
    PID:2112
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=c: /on=d: /maxsize=401MB
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:1056
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=c: /on=d: /maxsize=unbounded
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:344
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=c: /on=e: /maxsize=401MB
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:1692
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=c: /on=e: /maxsize=unbounded
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:1624
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=c: /on=f: /maxsize=401MB
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:1168
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=c: /on=f: /maxsize=unbounded
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:1160
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=c: /on=g: /maxsize=401MB
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:2088
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=c: /on=g: /maxsize=unbounded
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:2188
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=c: /on=h: /maxsize=401MB
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:580
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=c: /on=h: /maxsize=unbounded
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:1736
- - C:\Windows\system32\vssadmin.exe
    vssadmin Delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:2380

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2752

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

C:\Huzuni.exe

Filesize
52KB

MD5
ea9c5fca65378fe641a1b708187a582f

SHA1
c7dba2587ffd02071fe12fdec646d70cf86d7f9e

SHA256
0ce2f58a1b2c0d87c054ef212914d84ffeac59243b4a8a3a9c615c876638d87d

SHA512
1006b532ad2df8532be3fe651d24908e0b83240bf5af4ef52ba6341d56eac93fc35d75ae499b0f473354e3fc100d629a22daae206e4d05124842135559ca64ec

Download Submit
C:\Users\Admin\Pictures\BackupExpand.jpeg

Filesize
780KB

MD5
d1f50c10e8e47e90e67c4434e68a805c

SHA1
14fbb9b4e6b08057495389037cea028c165a572e

SHA256
78ee1f6326c19ec2c663ba983a967b3bc643856ae9623c36194c1afcb072abd1

SHA512
fafcfaa01cd6919e2b3cba02a2ca5e16f4bb07d9f7433f544420853b8cab703489f00aab604c5015ef38fa63769e16c4b0e8f224b351ae4c392d4fdc075ba56c

Download Submit
C:\window.bat

Filesize
1KB

MD5
9dba906094ee0f15f38e0640e5923270

SHA1
0118a885480cd04c5a4310fd3d39251dd769a3a5

SHA256
0e79efbeae919d458e637000c20e4e71ddb916903527c593248038a78358f57d

SHA512
e6985edc821486ce4ef0f467f348734ccab4aa1bacf961c4168de4e881960954a2c2c503824c9cc9f639ad9fff2e2df79241a75bf84cae99028082bdceee28e9

Download Submit
memory/2524-104-0x000000001B290000-0x000000001B310000-memory.dmp

Filesize
512KB

Download
memory/2524-106-0x000000001B290000-0x000000001B310000-memory.dmp

Filesize
512KB

Download
memory/2524-117-0x000000001B290000-0x000000001B310000-memory.dmp

Filesize
512KB

Download
memory/2524-17-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2524-116-0x000000001B290000-0x000000001B310000-memory.dmp

Filesize
512KB

Download
memory/2524-19-0x000007FEF5340000-0x000007FEF5D2C000-memory.dmp

Filesize
9.9MB

Download
memory/2524-21-0x000000001B290000-0x000000001B310000-memory.dmp

Filesize
512KB

Download
memory/2524-22-0x000000001B290000-0x000000001B310000-memory.dmp

Filesize
512KB

Download
memory/2524-23-0x000000001B290000-0x000000001B310000-memory.dmp

Filesize
512KB

Download
memory/2524-114-0x000000001B290000-0x000000001B310000-memory.dmp

Filesize
512KB

Download
memory/2524-113-0x000000001B290000-0x000000001B310000-memory.dmp

Filesize
512KB

Download
memory/2524-10-0x0000000000EB0000-0x0000000000EC2000-memory.dmp

Filesize
72KB

Download
memory/2524-107-0x000000001B290000-0x000000001B310000-memory.dmp

Filesize
512KB

Download
memory/2524-108-0x000007FEF5340000-0x000007FEF5D2C000-memory.dmp

Filesize
9.9MB

Download
memory/2524-109-0x000000001B290000-0x000000001B310000-memory.dmp

Filesize
512KB

Download
memory/2524-110-0x000000001B290000-0x000000001B310000-memory.dmp

Filesize
512KB

Download
memory/2524-111-0x000000001B290000-0x000000001B310000-memory.dmp

Filesize
512KB

Download
memory/2524-112-0x000000001B290000-0x000000001B310000-memory.dmp

Filesize
512KB

Download
memory/2700-1-0x000007FEF5340000-0x000007FEF5D2C000-memory.dmp

Filesize
9.9MB

Download
memory/2700-0-0x0000000000A30000-0x0000000000A46000-memory.dmp

Filesize
88KB

Download
memory/2700-20-0x000007FEF5340000-0x000007FEF5D2C000-memory.dmp

Filesize
9.9MB

Download
memory/2700-2-0x000000001B190000-0x000000001B210000-memory.dmp

Filesize
512KB

Download