asyncrat | b40bb21bbe95e8431da174700874d89150002a974e7046890146d06cec9044ad

Analysis

max time kernel
150s
max time network
145s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
10-11-2024 05:32

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General

Target

Client.exe
Size

48KB
MD5

9028b853115f1fbc562435c3191b3546
SHA1

3b06a8e9bafe7a1d75243884fc11862c059a29dd
SHA256

b40bb21bbe95e8431da174700874d89150002a974e7046890146d06cec9044ad
SHA512

d4e7fd7b13075af3a2f6d83ebb3106c48dad939eee1281a3acdd653d0d093757fcfce4072a1de8ac8a7eaab4ed7ecf560d56e03c8864f14d626da54e7146eb80
SSDEEP

768:lV9TQo2oIL4+M0+LiktelDSN+iV08Ybyge7LrMvEgK/JzWfVc6KN:lVpQoVsktKDs4zb1wUnkJzWfVclN

Score

10^/10

asyncrat default discovery evasion persistence privilege_escalation rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

127.0.0.1:8848

127.0.0.1:54025

147.185.221.23:8848

147.185.221.23:54025

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
install
false
install_file
opus hook injector.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat
Grants admin privileges 1 TTPs
Uses net.exe to modify the user's privileges.

Account Manipulation
T1098

Modifies Windows Firewall 2 TTPs 2 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4520	netsh.exe
1236	netsh.exe

Network Service Discovery 1 TTPs 1 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
1608	ARP.EXE

Enumerates processes with tasklist 1 TTPs 1 IoCs

discovery

Process Discovery

T1057

pid	Process
4016	tasklist.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Logs\CBS\CBS.log	TiWorker.exe

Launches sc.exe 1 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
1992	sc.exe

Event Triggered Execution: Netsh Helper DLL 1 TTPs 6 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe

Permission Groups Discovery: Local Groups 1 TTPs
Attempt to find local system groups and permission settings.
discovery

Local Groups
T1069.001

System Network Connections Discovery 1 TTPs 1 IoCs

Attempt to get a listing of network connections.

discovery

System Network Connections Discovery

T1049

pid	Process
996	NETSTAT.EXE

Collects information from the system 1 TTPs 1 IoCs

Uses WMIC.exe to find detailed system information.

Data from Local System

T1005

pid	Process
4716	WMIC.exe

Gathers network information 2 TTPs 2 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
4088	ipconfig.exe
996	NETSTAT.EXE

Gathers system information 1 TTPs 1 IoCs

Runs systeminfo.exe.

System Information Discovery

T1082

pid	Process
2292	systeminfo.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1848	Client.exe
Token: SeSecurityPrivilege	4568	TiWorker.exe
Token: SeRestorePrivilege	4568	TiWorker.exe
Token: SeBackupPrivilege	4568	TiWorker.exe
Token: SeIncreaseQuotaPrivilege	4716	WMIC.exe
Token: SeSecurityPrivilege	4716	WMIC.exe
Token: SeTakeOwnershipPrivilege	4716	WMIC.exe
Token: SeLoadDriverPrivilege	4716	WMIC.exe
Token: SeSystemProfilePrivilege	4716	WMIC.exe
Token: SeSystemtimePrivilege	4716	WMIC.exe
Token: SeProfSingleProcessPrivilege	4716	WMIC.exe
Token: SeIncBasePriorityPrivilege	4716	WMIC.exe
Token: SeCreatePagefilePrivilege	4716	WMIC.exe
Token: SeBackupPrivilege	4716	WMIC.exe
Token: SeRestorePrivilege	4716	WMIC.exe
Token: SeShutdownPrivilege	4716	WMIC.exe
Token: SeDebugPrivilege	4716	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4716	WMIC.exe
Token: SeRemoteShutdownPrivilege	4716	WMIC.exe
Token: SeUndockPrivilege	4716	WMIC.exe
Token: SeManageVolumePrivilege	4716	WMIC.exe
Token: 33	4716	WMIC.exe
Token: 34	4716	WMIC.exe
Token: 35	4716	WMIC.exe
Token: 36	4716	WMIC.exe
Token: SeIncreaseQuotaPrivilege	4716	WMIC.exe
Token: SeSecurityPrivilege	4716	WMIC.exe
Token: SeTakeOwnershipPrivilege	4716	WMIC.exe
Token: SeLoadDriverPrivilege	4716	WMIC.exe
Token: SeSystemProfilePrivilege	4716	WMIC.exe
Token: SeSystemtimePrivilege	4716	WMIC.exe
Token: SeProfSingleProcessPrivilege	4716	WMIC.exe
Token: SeIncBasePriorityPrivilege	4716	WMIC.exe
Token: SeCreatePagefilePrivilege	4716	WMIC.exe
Token: SeBackupPrivilege	4716	WMIC.exe
Token: SeRestorePrivilege	4716	WMIC.exe
Token: SeShutdownPrivilege	4716	WMIC.exe
Token: SeDebugPrivilege	4716	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4716	WMIC.exe
Token: SeRemoteShutdownPrivilege	4716	WMIC.exe
Token: SeUndockPrivilege	4716	WMIC.exe
Token: SeManageVolumePrivilege	4716	WMIC.exe
Token: 33	4716	WMIC.exe
Token: 34	4716	WMIC.exe
Token: 35	4716	WMIC.exe
Token: 36	4716	WMIC.exe
Token: SeIncreaseQuotaPrivilege	3400	WMIC.exe
Token: SeSecurityPrivilege	3400	WMIC.exe
Token: SeTakeOwnershipPrivilege	3400	WMIC.exe
Token: SeLoadDriverPrivilege	3400	WMIC.exe
Token: SeSystemProfilePrivilege	3400	WMIC.exe
Token: SeSystemtimePrivilege	3400	WMIC.exe
Token: SeProfSingleProcessPrivilege	3400	WMIC.exe
Token: SeIncBasePriorityPrivilege	3400	WMIC.exe
Token: SeCreatePagefilePrivilege	3400	WMIC.exe
Token: SeBackupPrivilege	3400	WMIC.exe
Token: SeRestorePrivilege	3400	WMIC.exe
Token: SeShutdownPrivilege	3400	WMIC.exe
Token: SeDebugPrivilege	3400	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3400	WMIC.exe
Token: SeRemoteShutdownPrivilege	3400	WMIC.exe
Token: SeUndockPrivilege	3400	WMIC.exe
Token: SeManageVolumePrivilege	3400	WMIC.exe
Token: 33	3400	WMIC.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
1848	Client.exe
1848	Client.exe
1848	Client.exe
1848	Client.exe

Suspicious use of WriteProcessMemory 50 IoCs

description	pid	Process	procid_target
PID 1848 wrote to memory of 1464	1848	Client.exe	91
PID 1848 wrote to memory of 1464	1848	Client.exe	91
PID 1464 wrote to memory of 2292	1464	cmd.exe	93
PID 1464 wrote to memory of 2292	1464	cmd.exe	93
PID 1464 wrote to memory of 2184	1464	cmd.exe	97
PID 1464 wrote to memory of 2184	1464	cmd.exe	97
PID 1464 wrote to memory of 4716	1464	cmd.exe	98
PID 1464 wrote to memory of 4716	1464	cmd.exe	98
PID 1464 wrote to memory of 1928	1464	cmd.exe	99
PID 1464 wrote to memory of 1928	1464	cmd.exe	99
PID 1928 wrote to memory of 2620	1928	net.exe	100
PID 1928 wrote to memory of 2620	1928	net.exe	100
PID 1464 wrote to memory of 4112	1464	cmd.exe	101
PID 1464 wrote to memory of 4112	1464	cmd.exe	101
PID 4112 wrote to memory of 2804	4112	query.exe	102
PID 4112 wrote to memory of 2804	4112	query.exe	102
PID 1464 wrote to memory of 976	1464	cmd.exe	103
PID 1464 wrote to memory of 976	1464	cmd.exe	103
PID 976 wrote to memory of 1888	976	net.exe	104
PID 976 wrote to memory of 1888	976	net.exe	104
PID 1464 wrote to memory of 2536	1464	cmd.exe	105
PID 1464 wrote to memory of 2536	1464	cmd.exe	105
PID 2536 wrote to memory of 1424	2536	net.exe	106
PID 2536 wrote to memory of 1424	2536	net.exe	106
PID 1464 wrote to memory of 1948	1464	cmd.exe	107
PID 1464 wrote to memory of 1948	1464	cmd.exe	107
PID 1948 wrote to memory of 4616	1948	net.exe	108
PID 1948 wrote to memory of 4616	1948	net.exe	108
PID 1464 wrote to memory of 1652	1464	cmd.exe	109
PID 1464 wrote to memory of 1652	1464	cmd.exe	109
PID 1652 wrote to memory of 1384	1652	net.exe	110
PID 1652 wrote to memory of 1384	1652	net.exe	110
PID 1464 wrote to memory of 3400	1464	cmd.exe	111
PID 1464 wrote to memory of 3400	1464	cmd.exe	111
PID 1464 wrote to memory of 4016	1464	cmd.exe	112
PID 1464 wrote to memory of 4016	1464	cmd.exe	112
PID 1464 wrote to memory of 4088	1464	cmd.exe	113
PID 1464 wrote to memory of 4088	1464	cmd.exe	113
PID 1464 wrote to memory of 4216	1464	cmd.exe	114
PID 1464 wrote to memory of 4216	1464	cmd.exe	114
PID 1464 wrote to memory of 1608	1464	cmd.exe	115
PID 1464 wrote to memory of 1608	1464	cmd.exe	115
PID 1464 wrote to memory of 996	1464	cmd.exe	116
PID 1464 wrote to memory of 996	1464	cmd.exe	116
PID 1464 wrote to memory of 1992	1464	cmd.exe	117
PID 1464 wrote to memory of 1992	1464	cmd.exe	117
PID 1464 wrote to memory of 4520	1464	cmd.exe	118
PID 1464 wrote to memory of 4520	1464	cmd.exe	118
PID 1464 wrote to memory of 1236	1464	cmd.exe	119
PID 1464 wrote to memory of 1236	1464	cmd.exe	119

C:\Users\Admin\AppData\Local\Temp\Client.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:1848
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1464
- - C:\Windows\system32\systeminfo.exe
    systeminfo
    3⤵
    - Gathers system information
    PID:2292
- - C:\Windows\system32\HOSTNAME.EXE
    hostname
    3⤵
    PID:2184
- - C:\Windows\System32\Wbem\WMIC.exe
    wmic logicaldisk get caption,description,providername
    3⤵
    - Collects information from the system
    - Suspicious use of AdjustPrivilegeToken
    PID:4716
- - C:\Windows\system32\net.exe
    net user
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1928
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 user
      4⤵
      PID:2620
- - C:\Windows\system32\query.exe
    query user
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4112
  - - C:\Windows\system32\quser.exe
      "C:\Windows\system32\quser.exe"
      4⤵
      PID:2804
- - C:\Windows\system32\net.exe
    net localgroup
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:976
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 localgroup
      4⤵
      PID:1888
- - C:\Windows\system32\net.exe
    net localgroup administrators
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2536
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 localgroup administrators
      4⤵
      PID:1424
- - C:\Windows\system32\net.exe
    net user guest
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1948
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 user guest
      4⤵
      PID:4616
- - C:\Windows\system32\net.exe
    net user administrator
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1652
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 user administrator
      4⤵
      PID:1384
- - C:\Windows\System32\Wbem\WMIC.exe
    wmic startup get caption,command
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:3400
- - C:\Windows\system32\tasklist.exe
    tasklist /svc
    3⤵
    - Enumerates processes with tasklist
    PID:4016
- - C:\Windows\system32\ipconfig.exe
    ipconfig /all
    3⤵
    - Gathers network information
    PID:4088
- - C:\Windows\system32\ROUTE.EXE
    route print
    3⤵
    PID:4216
- - C:\Windows\system32\ARP.EXE
    arp -a
    3⤵
    - Network Service Discovery
    PID:1608
- - C:\Windows\system32\NETSTAT.EXE
    netstat -ano
    3⤵
    - System Network Connections Discovery
    - Gathers network information
    PID:996
- - C:\Windows\system32\sc.exe
    sc query type= service state= all
    3⤵
    - Launches sc.exe
    PID:1992
- - C:\Windows\system32\netsh.exe
    netsh firewall show state
    3⤵
    - Modifies Windows Firewall
    - Event Triggered Execution: Netsh Helper DLL
    PID:4520
- - C:\Windows\system32\netsh.exe
    netsh firewall show config
    3⤵
    - Modifies Windows Firewall
    - Event Triggered Execution: Netsh Helper DLL
    PID:1236

C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.4467_none_7e0f83e07c8c1985\TiWorker.exe
C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.4467_none_7e0f83e07c8c1985\TiWorker.exe -Embedding
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:4568

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Persistence

Account Manipulation

T1098

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Account Manipulation

T1098

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Credential Access

Discovery

Network Service Discovery

T1046

Permission Groups Discovery

T1069

Local Groups

T1069.001

Process Discovery

T1057

System Information Discovery

T1082

System Network Connections Discovery

T1049

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1848-10-0x000000001CE60000-0x000000001CE7E000-memory.dmp

Filesize
120KB

Download
memory/1848-9-0x0000000003160000-0x0000000003170000-memory.dmp

Filesize
64KB

Download
memory/1848-3-0x00007FFECE453000-0x00007FFECE455000-memory.dmp

Filesize
8KB

Download
memory/1848-6-0x00007FFECE450000-0x00007FFECEF12000-memory.dmp

Filesize
10.8MB

Download
memory/1848-11-0x0000000002FC0000-0x0000000002FCE000-memory.dmp

Filesize
56KB

Download
memory/1848-8-0x000000001CEC0000-0x000000001CF36000-memory.dmp

Filesize
472KB

Download
memory/1848-2-0x00007FFECE450000-0x00007FFECEF12000-memory.dmp

Filesize
10.8MB

Download
memory/1848-0-0x00007FFECE453000-0x00007FFECE455000-memory.dmp

Filesize
8KB

Download
memory/1848-7-0x00007FFECE450000-0x00007FFECEF12000-memory.dmp

Filesize
10.8MB

Download
memory/1848-12-0x00007FFECE450000-0x00007FFECEF12000-memory.dmp

Filesize
10.8MB

Download
memory/1848-13-0x00007FFECE450000-0x00007FFECEF12000-memory.dmp

Filesize
10.8MB

Download
memory/1848-14-0x00007FFECE450000-0x00007FFECEF12000-memory.dmp

Filesize
10.8MB

Download
memory/1848-15-0x00007FFECE450000-0x00007FFECEF12000-memory.dmp

Filesize
10.8MB

Download
memory/1848-16-0x00007FFECE450000-0x00007FFECEF12000-memory.dmp

Filesize
10.8MB

Download
memory/1848-17-0x0000000003010000-0x000000000301C000-memory.dmp

Filesize
48KB

Download
memory/1848-1-0x0000000000F50000-0x0000000000F62000-memory.dmp

Filesize
72KB

Download