4006c709faeedf03e8b58886eeff6b40353caec761847756e2df446f7c20bfa1

General

Target

4006c709faeedf03e8b58886eeff6b40353caec761847756e2df446f7c20bfa1.exe
Size

231KB
MD5

d7f7dfa376ae79bae6a0d295380998de
SHA1

fba36039752c612c0ddb8ad6d1977f956bfe0276
SHA256

4006c709faeedf03e8b58886eeff6b40353caec761847756e2df446f7c20bfa1
SHA512

bdaa5a2b8d650ad5a091e6eca0deb62de63d080f9df2fe127a58d3432681d33f399d0575f97278e0af3566bda008295783981345b906d37a44c5a6a3d746f576
SSDEEP

3072:N1JbT4aQQlT4aI4AgymsMU5a44Av2E8heNdqMREhJLsyV9GGWPGWgnVFqQMeJq7n:NPTh45gy/R4Av2TS9EhN1qQMeQLtDB

Score

8^/10

bootkit discovery persistence

Malware Config

Signatures

Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
2812	avast_one_essential_setup_online_x64.exe
1216	Process not Found

Loads dropped DLL 2 IoCs

pid	Process
1544	4006c709faeedf03e8b58886eeff6b40353caec761847756e2df446f7c20bfa1.exe
1544	4006c709faeedf03e8b58886eeff6b40353caec761847756e2df446f7c20bfa1.exe

Checks for any installed AV software in registry 1 TTPs 3 IoCs

Security Software Discovery

T1518.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Software\AVAST Software\Avast	avast_one_essential_setup_online_x64.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\Avast Software\Avast	avast_one_essential_setup_online_x64.exe
Key opened	\Registry\MACHINE\SOFTWARE\Avast Software\Avast	avast_one_essential_setup_online_x64.exe

Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	4006c709faeedf03e8b58886eeff6b40353caec761847756e2df446f7c20bfa1.exe
File opened for modification	\??\PhysicalDrive0	avast_one_essential_setup_online_x64.exe

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4006c709faeedf03e8b58886eeff6b40353caec761847756e2df446f7c20bfa1.exe

Checks processor information in registry 2 TTPs 4 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Update Signature	avast_one_essential_setup_online_x64.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Update Revision	avast_one_essential_setup_online_x64.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\CurrentPatchLevel	avast_one_essential_setup_online_x64.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	avast_one_essential_setup_online_x64.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436	4006c709faeedf03e8b58886eeff6b40353caec761847756e2df446f7c20bfa1.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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	4006c709faeedf03e8b58886eeff6b40353caec761847756e2df446f7c20bfa1.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: 32	2812	avast_one_essential_setup_online_x64.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1544 wrote to memory of 2812	1544	4006c709faeedf03e8b58886eeff6b40353caec761847756e2df446f7c20bfa1.exe	30
PID 1544 wrote to memory of 2812	1544	4006c709faeedf03e8b58886eeff6b40353caec761847756e2df446f7c20bfa1.exe	30
PID 1544 wrote to memory of 2812	1544	4006c709faeedf03e8b58886eeff6b40353caec761847756e2df446f7c20bfa1.exe	30
PID 1544 wrote to memory of 2812	1544	4006c709faeedf03e8b58886eeff6b40353caec761847756e2df446f7c20bfa1.exe	30

C:\Users\Admin\AppData\Local\Temp\4006c709faeedf03e8b58886eeff6b40353caec761847756e2df446f7c20bfa1.exe
"C:\Users\Admin\AppData\Local\Temp\4006c709faeedf03e8b58886eeff6b40353caec761847756e2df446f7c20bfa1.exe"
1⤵
- Loads dropped DLL
- Writes to the Master Boot Record (MBR)
- System Location Discovery: System Language Discovery
- Modifies system certificate store
- Suspicious use of WriteProcessMemory
PID:1544
- C:\Windows\Temp\asw.d5f30055ddbc5232\avast_one_essential_setup_online_x64.exe
  "C:\Windows\Temp\asw.d5f30055ddbc5232\avast_one_essential_setup_online_x64.exe" /cookie:mmm_aon_003_999_d8h_m:dlid_AVAST-ONE-FREE-WIN-PP /ga_clientid:700af71b-e5d4-4083-84b9-7e12d0901708 /edat_dir:C:\Windows\Temp\asw.d5f30055ddbc5232
  2⤵
  - Executes dropped EXE
  - Checks for any installed AV software in registry
  - Writes to the Master Boot Record (MBR)
  - Checks processor information in registry
  - Suspicious use of AdjustPrivilegeToken
  PID:2812

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Subvert Trust Controls

1

T1553

Install Root Certificate

1

T1553.004

Credential Access

Discovery

Query Registry

1

T1012

Software Discovery

1

T1518

Security Software Discovery

1

T1518.001

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\Temp\asw.d5f30055ddbc5232\avast_one_essential_setup_online_x64.exe

Filesize
9.5MB

MD5
3cb9ff19d049fffc674a3d8b01e98376

SHA1
eef0fc5734f9d7d386b926e53f96efefbb94673b

SHA256
4f5e15321ab95d6a07c4d2e2317eaedcf3d377200cc3b4ca63247477660b3a98

SHA512
03af8a34b03010a4846bd6d99c2421b4cccbe176307c279f8ff8544b1a776511ec625c1e56381fd94b863b00d2f9faf9d1e0dde6c1fa4cee8c5065d83a25918b

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads