plugx | 72a7b8fe4b8401120124e8f9460bfd457fbf76b70a0c057b58ff271c5b2aadca

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14-10-2024 13:09

241014-qd9sbawhrb 10

14-10-2024 13:03

14-10-2024 12:59

14-10-2024 12:57

14-10-2024 12:55

14-10-2024 12:54

14-10-2024 12:52

Analysis

max time kernel
301s
max time network
312s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
14-10-2024 13:03

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General

Target

AvastSvcZEg/AvastSvc.exe
Size

60KB
MD5

a72036f635cecf0dcb1e9c6f49a8fa5b
SHA1

049813b955db1dd90952657ae2bd34250153563e
SHA256

85ca20eeec3400c68a62639a01928a5dab824d2eadf589e5cbfe5a2bc41d9654
SHA512

e3582e0969361d272c2469ce139ec809b9b0ac98fbc5eb5bb287442aed4c6ba69ed8175b68970751c93730cfaf07b75c3bc5e4e24aeda8f984b24f33bb8e3da2
SSDEEP

768:Q/WQ3/TymxfsHYPry0bgYh3LKgMoCDGFh9D:Q+QvT7xUHYPDbgYVLWofD

Score

10^/10

plugx discovery persistence trojan

Malware Config

Extracted

Family

plugx

103.56.53.46:80

103.56.53.46:110

103.56.53.46:443

103.56.53.46:5938

Attributes

folder
AvastSvcZEg

Signatures

PlugX
PlugX is a RAT (Remote Access Trojan) that has been around since 2008.
trojan plugx
Executes dropped EXE 1 IoCs

Processes:

AvastSvc.exe

pid process

3364 AvastSvc.exe
Loads dropped DLL 1 IoCs

Processes:

AvastSvc.exe

pid process

3364 AvastSvc.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

AvastSvc.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\AvastSvcZEg = "\"C:\\ProgramData\\AvastSvcZEg\\AvastSvc.exe\" 611"	AvastSvc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\AvastSvcZEg = "\"C:\\ProgramData\\AvastSvcZEg\\AvastSvc.exe\" 611"	AvastSvc.exe

Enumerates connected drives 3 TTPs 2 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:

AvastSvc.exe

description ioc process

File opened (read-only) \??\D: AvastSvc.exe
File opened (read-only) \??\F: AvastSvc.exe

description	ioc	process
File opened (read-only)	\??\D:	AvastSvc.exe
File opened (read-only)	\??\F:	AvastSvc.exe

System Location Discovery: System Language Discovery 1 TTPs 2 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

Processes:

AvastSvc.exeAvastSvc.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AvastSvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AvastSvc.exe

Modifies registry class 5 IoCs

Processes:

AvastSvc.exeAvastSvc.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\CLASSES\ms-pu	AvastSvc.exe
Key created	\REGISTRY\MACHINE\Software\CLASSES\ms-pu\PROXY	AvastSvc.exe
Key created	\REGISTRY\MACHINE\Software\CLASSES\ms-pu	AvastSvc.exe
Key created	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000_Classes\ms-pu	AvastSvc.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\ms-pu\CLSID = 38004100420037004600340039004600300030003300340035003800300046000000	AvastSvc.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

Processes:

AvastSvc.exe

pid	process
3364	AvastSvc.exe
3364	AvastSvc.exe
3364	AvastSvc.exe
3364	AvastSvc.exe
3364	AvastSvc.exe
3364	AvastSvc.exe
3364	AvastSvc.exe
3364	AvastSvc.exe
3364	AvastSvc.exe
3364	AvastSvc.exe
3364	AvastSvc.exe
3364	AvastSvc.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

AvastSvc.exe

description pid process

Token: SeDebugPrivilege 3364 AvastSvc.exe
Token: SeDebugPrivilege 3364 AvastSvc.exe
Token: SeTcbPrivilege 3364 AvastSvc.exe

description	pid	process
Token: SeDebugPrivilege	3364	AvastSvc.exe
Token: SeDebugPrivilege	3364	AvastSvc.exe
Token: SeTcbPrivilege	3364	AvastSvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

cmd.exeAvastSvc.exe

description	pid	process	target process
PID 5088 wrote to memory of 1552	5088	cmd.exe	AvastSvc.exe
PID 5088 wrote to memory of 1552	5088	cmd.exe	AvastSvc.exe
PID 5088 wrote to memory of 1552	5088	cmd.exe	AvastSvc.exe
PID 1552 wrote to memory of 3364	1552	AvastSvc.exe	AvastSvc.exe
PID 1552 wrote to memory of 3364	1552	AvastSvc.exe	AvastSvc.exe
PID 1552 wrote to memory of 3364	1552	AvastSvc.exe	AvastSvc.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\AvastSvcZEg\AvastSvc.exe
1⤵
- Suspicious use of WriteProcessMemory
PID:5088
- C:\Users\Admin\AppData\Local\Temp\AvastSvcZEg\AvastSvc.exe
  C:\Users\Admin\AppData\Local\Temp\AvastSvcZEg\AvastSvc.exe
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1552
- - C:\ProgramData\AvastSvcZEg\AvastSvc.exe
    C:\ProgramData\AvastSvcZEg\AvastSvc.exe 611
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Enumerates connected drives
    - System Location Discovery: System Language Discovery
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3364

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\AvastSvcZEg\AvastAuth.dat

Filesize
160KB

MD5
53830fe278811363f93e0906d8b5ce69

SHA1
b133578af848e10500cc8b943483ed71e86a713a

SHA256
8ec409c1537e3030405bc8f8353d2605d1e88f1b245554383682f3aa8b5100ec

SHA512
c87497b49d2924be200053495074e16d82fdc875ecdcd231e185479901020c176c2a478c52eea55a9908fe3605ed3d5b2037fa4c83248d4d2bfea45f9f03dc37

Download Submit
C:\ProgramData\AvastSvcZEg\AvastSvc.exe

Filesize
60KB

MD5
a72036f635cecf0dcb1e9c6f49a8fa5b

SHA1
049813b955db1dd90952657ae2bd34250153563e

SHA256
85ca20eeec3400c68a62639a01928a5dab824d2eadf589e5cbfe5a2bc41d9654

SHA512
e3582e0969361d272c2469ce139ec809b9b0ac98fbc5eb5bb287442aed4c6ba69ed8175b68970751c93730cfaf07b75c3bc5e4e24aeda8f984b24f33bb8e3da2

Download Submit
C:\ProgramData\AvastSvcZEg\wsc.dll

Filesize
52KB

MD5
831252e7fa9bd6fa174715647ebce516

SHA1
bf8c5bf141f0db53000805f2629e6e031d137ceb

SHA256
6491c646397025bf02709f1bd3025f1622abdc89b550ac38ce6fac938353b954

SHA512
0be6e898dcb75b32358bb8c2214e7b9453034ecfbe71d092df75b186a28f97ae7d5737f010b9d9e781c6b4cf3da19ee4a7cf5002604d23c527c55a3f7a0dba04

Download Submit
memory/1552-2-0x00000000007F0000-0x00000000008F0000-memory.dmp

Filesize
1024KB

Download
memory/1552-1-0x0000000000F30000-0x0000000004B67000-memory.dmp

Filesize
60.2MB

Download
memory/3364-14-0x0000000000E30000-0x0000000000F30000-memory.dmp

Filesize
1024KB

Download
memory/3364-13-0x0000000001100000-0x0000000004D37000-memory.dmp

Filesize
60.2MB

Download
memory/3364-15-0x0000000001100000-0x0000000004D37000-memory.dmp

Filesize
60.2MB

Download
memory/3364-16-0x0000000001100000-0x0000000004D37000-memory.dmp

Filesize
60.2MB

Download
memory/3364-17-0x0000000000E30000-0x0000000000F30000-memory.dmp

Filesize
1024KB

Download