fa47d6d85592087d1cba503253670920ac9545deb3176006fc79606b21ae966c

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
21/08/2024, 13:45

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General

Target

Svhost.exe
Size

399KB
MD5

7d4970831fafb993a4b0de345cb6832b
SHA1

ff95a1c11fe502a396f65cb817abf6796dfb791a
SHA256

fa47d6d85592087d1cba503253670920ac9545deb3176006fc79606b21ae966c
SHA512

9b27ecaca0dc6b7b68acdcfc4308f213b94ddfea3cbc357ee96e1cc82bd2e3cfb06c4c8a9ce5647fbde18931f5e2b34e5a119295c4548d719b7a85d425657b84
SSDEEP

6144:PaSpJQYtBJ5666+e6VlWT8b9L+s82y00ZFlTzubWKrhtwwD:PPph95o+PVle8Is8LZFFCrhtw4

Score

10^/10

persistence privilege_escalation

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\System32\\userinit.exe,C:\\Users\\Admin\\AppData\\Roaming\\xdwdAvast Antivirus Upgrade.exe"	Svhost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\System32\\userinit.exe"	Svhost.exe

Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Software\Microsoft\Active Setup\Installed Components	explorer.exe

Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	Svhost.exe

Loads dropped DLL 5 IoCs

pid	Process
2648	Process not Found
540	WmiApSrv.exe
4112	Process not Found
1096	Process not Found
4124	Process not Found

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-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xdwdfghfghfg = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\xdwdMicrosoft Dynamics Upgrade.exe"	Svhost.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\xdwd.dll	Svhost.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 2 IoCs

evasion

pid	Process
2384	timeout.exe
3504	timeout.exe

Kills process with taskkill 2 IoCs

evasion

pid	Process
4980	taskkill.exe
3724	taskkill.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\Deployment\Package\*\S-1-5-21-1302416131-1437503476-2806442725-1000\{C8ADEA86-0FAF-4D17-8CFA-D77A2F3F171C}	explorer.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	explorer.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1840	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe
388	Svhost.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	388	Svhost.exe
Token: SeDebugPrivilege	4980	taskkill.exe
Token: SeShutdownPrivilege	4248	explorer.exe
Token: SeCreatePagefilePrivilege	4248	explorer.exe
Token: SeShutdownPrivilege	4248	explorer.exe
Token: SeCreatePagefilePrivilege	4248	explorer.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 388 wrote to memory of 4560	388	Svhost.exe	94
PID 388 wrote to memory of 4560	388	Svhost.exe	94
PID 4560 wrote to memory of 1840	4560	CMD.exe	96
PID 4560 wrote to memory of 1840	4560	CMD.exe	96
PID 388 wrote to memory of 3352	388	Svhost.exe	115
PID 388 wrote to memory of 3352	388	Svhost.exe	115
PID 388 wrote to memory of 1820	388	Svhost.exe	117
PID 388 wrote to memory of 1820	388	Svhost.exe	117
PID 3352 wrote to memory of 4416	3352	cmd.exe	120
PID 3352 wrote to memory of 4416	3352	cmd.exe	120
PID 1820 wrote to memory of 4980	1820	CMD.exe	119
PID 1820 wrote to memory of 4980	1820	CMD.exe	119
PID 388 wrote to memory of 4684	388	Svhost.exe	121
PID 388 wrote to memory of 4684	388	Svhost.exe	121
PID 4684 wrote to memory of 2384	4684	cmd.exe	123
PID 4684 wrote to memory of 2384	4684	cmd.exe	123
PID 4684 wrote to memory of 4248	4684	cmd.exe	124
PID 4684 wrote to memory of 4248	4684	cmd.exe	124
PID 4684 wrote to memory of 3724	4684	cmd.exe	125
PID 4684 wrote to memory of 3724	4684	cmd.exe	125
PID 4684 wrote to memory of 3504	4684	cmd.exe	126
PID 4684 wrote to memory of 3504	4684	cmd.exe	126

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Svhost.exe
"C:\Users\Admin\AppData\Local\Temp\Svhost.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:388
- C:\Windows\SYSTEM32\CMD.exe
  "CMD" /C SchTaSKs /CrEAte /F /sc OnLoGoN /rl HighEst /tn "svchost.exe" /tr "C:\Users\Admin\AppData\Roaming\xdwdAvast Antivirus Upgrade.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4560
- - C:\Windows\system32\schtasks.exe
    SchTaSKs /CrEAte /F /sc OnLoGoN /rl HighEst /tn "svchost.exe" /tr "C:\Users\Admin\AppData\Roaming\xdwdAvast Antivirus Upgrade.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1840
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtASks /deLeTe /F /Tn "svchost.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3352
- - C:\Windows\system32\schtasks.exe
    schtASks /deLeTe /F /Tn "svchost.exe"
    3⤵
    PID:4416
- C:\Windows\SYSTEM32\CMD.exe
  "CMD" /C taskkill /im explorer.exe /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1820
- - C:\Windows\system32\taskkill.exe
    taskkill /im explorer.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4980
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpDA39.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4684
- - C:\Windows\system32\timeout.exe
    timeout 5
    3⤵
    - Delays execution with timeout.exe
    PID:2384
- - C:\Windows\explorer.exe
    explorer.exe
    3⤵
    - Boot or Logon Autostart Execution: Active Setup
    - Modifies registry class
    - Suspicious use of AdjustPrivilegeToken
    PID:4248
- - C:\Windows\system32\taskkill.exe
    taskkill /im xdwdAvast Antivirus Upgrade.exe /f
    3⤵
    - Kills process with taskkill
    PID:3724
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3504

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
- Loads dropped DLL
PID:540

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpDA39.tmp.bat

Filesize
262B

MD5
6d9d226e200c983804f2e58ff09332f7

SHA1
3d18df8ac33d5ebbd1187c83427ae41d0554785d

SHA256
91742c9dccc44341057d5c8c47bd1602f37e897b5d74c947b7977b2a7c07ea3b

SHA512
60aa5636c25fc304c24ed149be6ce1355bd2e089b747f1b39c1672aabfeb8f9d141aa6fad061c578025d2cc6c5d76ee2a27e069980684543f024e68c3c91752d

Download Submit
C:\Windows\xdwd.dll

Filesize
136KB

MD5
16e5a492c9c6ae34c59683be9c51fa31

SHA1
97031b41f5c56f371c28ae0d62a2df7d585adaba

SHA256
35c8d022e1d917f1aabdceae98097ccc072161b302f84c768ca63e4b32ac2b66

SHA512
20fd369172ef5e3e2fde388666b42e8fe5f0c2bfa338c0345f45e98af6561a249ba3ecc48c3f16efcc73f02ecb67b3ddb1e2e8f0e77d18fa00ac34e6379e50b6

Download Submit
memory/388-0-0x00007FFD8B303000-0x00007FFD8B305000-memory.dmp

Filesize
8KB

Download
memory/388-1-0x0000000000490000-0x00000000004F8000-memory.dmp

Filesize
416KB

Download
memory/388-2-0x00007FFD8B303000-0x00007FFD8B305000-memory.dmp

Filesize
8KB

Download
memory/388-44-0x00007FFD8B300000-0x00007FFD8BDC1000-memory.dmp

Filesize
10.8MB

Download
memory/388-120-0x00007FFD8B300000-0x00007FFD8BDC1000-memory.dmp

Filesize
10.8MB

Download
memory/388-1107-0x00007FFD8B300000-0x00007FFD8BDC1000-memory.dmp

Filesize
10.8MB

Download
memory/540-91-0x00007FFDA9270000-0x00007FFDA9465000-memory.dmp

Filesize
2.0MB

Download
memory/540-90-0x00007FFDA930D000-0x00007FFDA930E000-memory.dmp

Filesize
4KB

Download
memory/540-93-0x00007FFDA9270000-0x00007FFDA9465000-memory.dmp

Filesize
2.0MB

Download