asyncrat | 6ea95e85a279f9f842504b80c85ec920aeaefab99ebc377709a1f4317929ccef

General

Target

file.exe
Size

45KB
MD5

c19b1914fdfb5f4dc77afef42e967909
SHA1

49436764140a7bfcd332bc91ca141706d0519a88
SHA256

6ea95e85a279f9f842504b80c85ec920aeaefab99ebc377709a1f4317929ccef
SHA512

8c26d71bd1c3b991446b7b7d1ec7ca995aeaf1c5a4e49af4f8b2c9b0cbe8f37f1b97b517899ab530d64a2a0111aafa12c631904c958ebc688fa2bcee0b8078e3
SSDEEP

768:Zu1a71T3EiJfWUzuydmo2qzDKjGKG6PIyzjbFgX3i3w0HpLofac5BDZgjS:Zu1a71T3xN2SKYDy3bCXS3/HpUagdiS

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

Mutex

TestM6SI8Ok23k

Attributes

delay
3
install
true
install_file
Nvidia.exe
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/WxVJqvSS

aes.plain

Signatures

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

Async RAT payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/5068-132-0x0000000000530000-0x0000000000542000-memory.dmp	asyncrat
C:\Users\Admin\AppData\Roaming\Nvidia.exe	asyncrat
C:\Users\Admin\AppData\Roaming\Nvidia.exe	asyncrat

Executes dropped EXE 1 IoCs

Processes:

Nvidia.exe

pid process

1564 Nvidia.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:

file.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation file.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
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

1700 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

3424 timeout.exe

pid	process
1564	Nvidia.exe

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

pid	process
1700	schtasks.exe

pid	process
3424	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

file.exe

pid	process
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe
5068	file.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

file.exeNvidia.exe

description pid process

Token: SeDebugPrivilege 5068 file.exe
Token: SeDebugPrivilege 1564 Nvidia.exe
Token: SeDebugPrivilege 1564 Nvidia.exe

description	pid	process
Token: SeDebugPrivilege	5068	file.exe
Token: SeDebugPrivilege	1564	Nvidia.exe
Token: SeDebugPrivilege	1564	Nvidia.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

file.execmd.execmd.exe

description	pid	process	target process
PID 5068 wrote to memory of 2748	5068	file.exe	cmd.exe
PID 5068 wrote to memory of 2748	5068	file.exe	cmd.exe
PID 5068 wrote to memory of 2748	5068	file.exe	cmd.exe
PID 5068 wrote to memory of 1492	5068	file.exe	cmd.exe
PID 5068 wrote to memory of 1492	5068	file.exe	cmd.exe
PID 5068 wrote to memory of 1492	5068	file.exe	cmd.exe
PID 2748 wrote to memory of 1700	2748	cmd.exe	schtasks.exe
PID 2748 wrote to memory of 1700	2748	cmd.exe	schtasks.exe
PID 2748 wrote to memory of 1700	2748	cmd.exe	schtasks.exe
PID 1492 wrote to memory of 3424	1492	cmd.exe	timeout.exe
PID 1492 wrote to memory of 3424	1492	cmd.exe	timeout.exe
PID 1492 wrote to memory of 3424	1492	cmd.exe	timeout.exe
PID 1492 wrote to memory of 1564	1492	cmd.exe	Nvidia.exe
PID 1492 wrote to memory of 1564	1492	cmd.exe	Nvidia.exe
PID 1492 wrote to memory of 1564	1492	cmd.exe	Nvidia.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5068

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Nvidia" /tr '"C:\Users\Admin\AppData\Roaming\Nvidia.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:2748

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "Nvidia" /tr '"C:\Users\Admin\AppData\Roaming\Nvidia.exe"'
3⤵
- Creates scheduled task(s)
PID:1700

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC846.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:1492

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:3424

C:\Users\Admin\AppData\Roaming\Nvidia.exe
"C:\Users\Admin\AppData\Roaming\Nvidia.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1564

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1

T1102

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpC846.tmp.bat
Filesize
150B

MD5
94a8e8b939e17d996ca32078f27fa3d1

SHA1
985a68299bfc3750ddccde4adfa733efd273eceb

SHA256
3e49bca06590cf7d1edf3fd8fff34bf42339c64091a7355d49fde9dc5420305c

SHA512
b45d888092fbab6b134e97a8d3a23e84e33e0b50f198607e7c582a7b9577fd66998196159475ba8a3f2eedbfa7d154787cb536d772ab176c4defe50f24359e63

Download Submit
C:\Users\Admin\AppData\Roaming\Nvidia.exe
Filesize
45KB

MD5
c19b1914fdfb5f4dc77afef42e967909

SHA1
49436764140a7bfcd332bc91ca141706d0519a88

SHA256
6ea95e85a279f9f842504b80c85ec920aeaefab99ebc377709a1f4317929ccef

SHA512
8c26d71bd1c3b991446b7b7d1ec7ca995aeaf1c5a4e49af4f8b2c9b0cbe8f37f1b97b517899ab530d64a2a0111aafa12c631904c958ebc688fa2bcee0b8078e3

Download Submit
C:\Users\Admin\AppData\Roaming\Nvidia.exe
Filesize
45KB

MD5
c19b1914fdfb5f4dc77afef42e967909

SHA1
49436764140a7bfcd332bc91ca141706d0519a88

SHA256
6ea95e85a279f9f842504b80c85ec920aeaefab99ebc377709a1f4317929ccef

SHA512
8c26d71bd1c3b991446b7b7d1ec7ca995aeaf1c5a4e49af4f8b2c9b0cbe8f37f1b97b517899ab530d64a2a0111aafa12c631904c958ebc688fa2bcee0b8078e3

Download Submit
memory/1492-136-0x0000000000000000-mapping.dmp

Download
memory/1564-140-0x0000000000000000-mapping.dmp

Download
memory/1700-137-0x0000000000000000-mapping.dmp

Download
memory/2748-135-0x0000000000000000-mapping.dmp

Download
memory/3424-139-0x0000000000000000-mapping.dmp

Download
memory/5068-132-0x0000000000530000-0x0000000000542000-memory.dmp

Filesize
72KB

Download
memory/5068-133-0x0000000004EC0000-0x0000000004F26000-memory.dmp

Filesize
408KB

Download
memory/5068-134-0x0000000005310000-0x00000000053AC000-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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