asyncrat | 6fc5883456ca655a74a91c3127486ab5c21186308fdebfca4ec9035e09d7069a

General

Target

tmp.exe
Size

73KB
MD5

e8032d887188081e383a6ebd6dbcd33a
SHA1

ccbd2b7b1dc9688098636bf4a778ae1e5e90dd17
SHA256

6fc5883456ca655a74a91c3127486ab5c21186308fdebfca4ec9035e09d7069a
SHA512

21babd4ff02d906274256c9a6defd85843f08d56a863c4f127f873652cb9b6205e13c581e6eed4ef51f617b4b85efcd87c7473398712131e21ace792fb235060

Score

10^/10

asyncrat default persistence rat suricata

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

vivald21.hopto.org:9954

63.141.237.188:9954

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat
suricata: ET MALWARE Generic AsyncRAT Style SSL Cert
suricata: ET MALWARE Generic AsyncRAT Style SSL Cert
suricata
suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
suricata

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/4588-148-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

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:

tmp.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation tmp.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	tmp.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

tmp.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\tej = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\tej.exe\""	tmp.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

tmp.exe

description pid process target process

PID 2248 set thread context of 4588 2248 tmp.exe tmp.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

powershell.exepowershell.exetmp.exe

pid process

3340 powershell.exe
3340 powershell.exe
2056 powershell.exe
2056 powershell.exe
2248 tmp.exe
2248 tmp.exe

description	pid	process	target process
PID 2248 set thread context of 4588	2248	tmp.exe	tmp.exe

pid	process
3340	powershell.exe
3340	powershell.exe
2056	powershell.exe
2056	powershell.exe
2248	tmp.exe
2248	tmp.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

powershell.exetmp.exepowershell.exetmp.exe

description	pid	process
Token: SeDebugPrivilege	3340	powershell.exe
Token: SeDebugPrivilege	2248	tmp.exe
Token: SeDebugPrivilege	2056	powershell.exe
Token: SeDebugPrivilege	4588	tmp.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

tmp.exe

description	pid	process	target process
PID 2248 wrote to memory of 3340	2248	tmp.exe	powershell.exe
PID 2248 wrote to memory of 3340	2248	tmp.exe	powershell.exe
PID 2248 wrote to memory of 3340	2248	tmp.exe	powershell.exe
PID 2248 wrote to memory of 2056	2248	tmp.exe	powershell.exe
PID 2248 wrote to memory of 2056	2248	tmp.exe	powershell.exe
PID 2248 wrote to memory of 2056	2248	tmp.exe	powershell.exe
PID 2248 wrote to memory of 4588	2248	tmp.exe	tmp.exe
PID 2248 wrote to memory of 4588	2248	tmp.exe	tmp.exe
PID 2248 wrote to memory of 4588	2248	tmp.exe	tmp.exe
PID 2248 wrote to memory of 4588	2248	tmp.exe	tmp.exe
PID 2248 wrote to memory of 4588	2248	tmp.exe	tmp.exe
PID 2248 wrote to memory of 4588	2248	tmp.exe	tmp.exe
PID 2248 wrote to memory of 4588	2248	tmp.exe	tmp.exe
PID 2248 wrote to memory of 4588	2248	tmp.exe	tmp.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2248

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3340

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMQAwAA==
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2056

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:4588

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

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\CLR_v4.0_32\UsageLogs\tmp.exe.log
Filesize
1KB

MD5
7ebe314bf617dc3e48b995a6c352740c

SHA1
538f643b7b30f9231a3035c448607f767527a870

SHA256
48178f884b8a4dd96e330b210b0530667d9473a7629fc6b4ad12b614bf438ee8

SHA512
0ba9d8f4244c15285e254d27b4bff7c49344ff845c48bc0bf0d8563072fab4d6f7a6abe6b6742e8375a08e9a3b3e5d5dc4937ab428dbe2dd8e62892fda04507e

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache
Filesize
53KB

MD5
3337d66209faa998d52d781d0ff2d804

SHA1
6594b85a70f998f79f43cdf1ca56137997534156

SHA256
9b946b062865f68b9f0f43a011d33d7ea0926a3c8f78fb20d9cab6144314e1bd

SHA512
8bbd14bd73111f7b55712f5d1e1b727e41db8e6e0c1243ee6809ff32b509e52dec7af34c064151fb5beccd59dda434a3f83abe987c561a25abfbb4cbcf9c7f1f

Download Submit
memory/2056-145-0x0000000000000000-mapping.dmp

Download
memory/2248-131-0x0000000005D10000-0x00000000062B4000-memory.dmp

Filesize
5.6MB

Download
memory/2248-132-0x0000000005630000-0x00000000056C2000-memory.dmp

Filesize
584KB

Download
memory/2248-133-0x0000000005610000-0x000000000561A000-memory.dmp

Filesize
40KB

Download
memory/2248-130-0x0000000000C50000-0x0000000000C68000-memory.dmp

Filesize
96KB

Download
memory/3340-135-0x0000000004980000-0x00000000049B6000-memory.dmp

Filesize
216KB

Download
memory/3340-144-0x00000000072E0000-0x00000000072FA000-memory.dmp

Filesize
104KB

Download
memory/3340-139-0x00000000058C0000-0x0000000005926000-memory.dmp

Filesize
408KB

Download
memory/3340-140-0x0000000005F50000-0x0000000005F6E000-memory.dmp

Filesize
120KB

Download
memory/3340-141-0x0000000006490000-0x00000000064D4000-memory.dmp

Filesize
272KB

Download
memory/3340-142-0x0000000007040000-0x00000000070B6000-memory.dmp

Filesize
472KB

Download
memory/3340-143-0x0000000007940000-0x0000000007FBA000-memory.dmp

Filesize
6.5MB

Download
memory/3340-138-0x0000000005750000-0x00000000057B6000-memory.dmp

Filesize
408KB

Download
memory/3340-137-0x0000000004E80000-0x0000000004EA2000-memory.dmp

Filesize
136KB

Download
memory/3340-136-0x0000000004FF0000-0x0000000005618000-memory.dmp

Filesize
6.2MB

Download
memory/3340-134-0x0000000000000000-mapping.dmp

Download
memory/4588-148-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4588-147-0x0000000000000000-mapping.dmp

Download
memory/4588-150-0x0000000006030000-0x00000000060CC000-memory.dmp

Filesize
624KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads