asyncrat | e850d01470445c2d1aeea4694ef6ca85e8417a5fdd867da5750d24d3e14e0834

General

Target

COPY.exe
Size

1.1MB
MD5

520ba96d18722d0d6dcc2f0250d52998
SHA1

b2db2f9fa0fd3a2c74ef0b10dc684737eac9f3d9
SHA256

ba4ffe8c2d64162b9f149242ecb7309a35886d05f5360da9e3e91a261a68c2ae
SHA512

44510d3088c495e49c0f3c71defaf7b244146424413a6432ed2f424b9f965b762683d497b697ab240eb10dead17de77c7abd1cd38727e92762ccae4aff444977
SSDEEP

24576:Ca+L5JM0ZZN8uX7QHUEjrgVo+ETCmqba0W+Tuu4gmmRt1ZGj:X+hjrX7Q0Ej4on23nTuu4gXR5G

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

asyncgeneration1.duckdns.org:4404

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/4692-153-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

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:

COPY.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation COPY.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

COPY.exe

description pid process target process

PID 3776 set thread context of 4692 3776 COPY.exe COPY.exe
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

4452 schtasks.exe
Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

COPY.exepowershell.exepowershell.exe

pid process

3776 COPY.exe
3776 COPY.exe
1512 powershell.exe
1364 powershell.exe
3776 COPY.exe
1364 powershell.exe
1512 powershell.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation	COPY.exe

description	pid	process	target process
PID 3776 set thread context of 4692	3776	COPY.exe	COPY.exe

pid	process
4452	schtasks.exe

pid	process
3776	COPY.exe
3776	COPY.exe
1512	powershell.exe
1364	powershell.exe
3776	COPY.exe
1364	powershell.exe
1512	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

COPY.exepowershell.exepowershell.exeCOPY.exe

description	pid	process
Token: SeDebugPrivilege	3776	COPY.exe
Token: SeDebugPrivilege	1364	powershell.exe
Token: SeDebugPrivilege	1512	powershell.exe
Token: SeDebugPrivilege	4692	COPY.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

COPY.exe

description	pid	process	target process
PID 3776 wrote to memory of 1364	3776	COPY.exe	powershell.exe
PID 3776 wrote to memory of 1364	3776	COPY.exe	powershell.exe
PID 3776 wrote to memory of 1364	3776	COPY.exe	powershell.exe
PID 3776 wrote to memory of 1512	3776	COPY.exe	powershell.exe
PID 3776 wrote to memory of 1512	3776	COPY.exe	powershell.exe
PID 3776 wrote to memory of 1512	3776	COPY.exe	powershell.exe
PID 3776 wrote to memory of 4452	3776	COPY.exe	schtasks.exe
PID 3776 wrote to memory of 4452	3776	COPY.exe	schtasks.exe
PID 3776 wrote to memory of 4452	3776	COPY.exe	schtasks.exe
PID 3776 wrote to memory of 4692	3776	COPY.exe	COPY.exe
PID 3776 wrote to memory of 4692	3776	COPY.exe	COPY.exe
PID 3776 wrote to memory of 4692	3776	COPY.exe	COPY.exe
PID 3776 wrote to memory of 4692	3776	COPY.exe	COPY.exe
PID 3776 wrote to memory of 4692	3776	COPY.exe	COPY.exe
PID 3776 wrote to memory of 4692	3776	COPY.exe	COPY.exe
PID 3776 wrote to memory of 4692	3776	COPY.exe	COPY.exe
PID 3776 wrote to memory of 4692	3776	COPY.exe	COPY.exe

C:\Users\Admin\AppData\Local\Temp\COPY.exe
"C:\Users\Admin\AppData\Local\Temp\COPY.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3776

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\COPY.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1364

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\yXBzlrEBvIU.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1512

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yXBzlrEBvIU" /XML "C:\Users\Admin\AppData\Local\Temp\tmp22DA.tmp"
2⤵
- Creates scheduled task(s)
PID:4452

C:\Users\Admin\AppData\Local\Temp\COPY.exe
"C:\Users\Admin\AppData\Local\Temp\COPY.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:4692

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

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
18KB

MD5
e5a2d5c5440b74c72e0149f6fe2e44a0

SHA1
b730643a19e3dc2b751d113a3113c5c9082c9fb9

SHA256
aa9cbbf6dba1fc250314e73a7edb038369ad6b1075f1ccfe9520766994e2be30

SHA512
702e1d2e7fa7b00a9e761548250f0ed57f7593c6b75ce052856cbf9b94dbde635577c380026091daa1cf86a032987ac9019399418fc3b2a53f46b903fdce08e6

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0yg4a2rg.cra.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp22DA.tmp
Filesize
1KB

MD5
73a642417a75ad66c732e9c7d5f6b69d

SHA1
76868b886e5ec8051eb26f09a1a89214da72e72a

SHA256
b58b8cdef3ede120928f71536dd964d9110d17e829a6be32fb50d24879e524f4

SHA512
b7732bc0056dc8e92b6fbfceb12c606aa37e3b867a825d42e390c4efd763d92e1cc93107fcb665e06936600ffae6a74e4a70f4937be7d385d3387ffb6ef95a15

Download Submit
memory/1364-145-0x00000000006F0000-0x0000000000700000-memory.dmp

Filesize
64KB

Download
memory/1364-202-0x000000007EF60000-0x000000007EF70000-memory.dmp

Filesize
64KB

Download
memory/1364-143-0x0000000002160000-0x0000000002196000-memory.dmp

Filesize
216KB

Download
memory/1364-144-0x0000000004BA0000-0x00000000051C8000-memory.dmp

Filesize
6.2MB

Download
memory/1364-203-0x0000000006FA0000-0x0000000007036000-memory.dmp

Filesize
600KB

Download
memory/1364-199-0x0000000006D30000-0x0000000006D4A000-memory.dmp

Filesize
104KB

Download
memory/1364-207-0x0000000007040000-0x0000000007048000-memory.dmp

Filesize
32KB

Download
memory/1364-188-0x0000000005FB0000-0x0000000005FCE000-memory.dmp

Filesize
120KB

Download
memory/1364-146-0x00000000006F0000-0x0000000000700000-memory.dmp

Filesize
64KB

Download
memory/1364-177-0x0000000075890000-0x00000000758DC000-memory.dmp

Filesize
304KB

Download
memory/1364-151-0x0000000004AF0000-0x0000000004B56000-memory.dmp

Filesize
408KB

Download
memory/1364-152-0x00000000053C0000-0x0000000005426000-memory.dmp

Filesize
408KB

Download
memory/1364-174-0x00000000006F0000-0x0000000000700000-memory.dmp

Filesize
64KB

Download
memory/1512-173-0x0000000006850000-0x000000000686E000-memory.dmp

Filesize
120KB

Download
memory/1512-201-0x000000007F060000-0x000000007F070000-memory.dmp

Filesize
64KB

Download
memory/1512-206-0x0000000007EA0000-0x0000000007EBA000-memory.dmp

Filesize
104KB

Download
memory/1512-175-0x0000000002F00000-0x0000000002F10000-memory.dmp

Filesize
64KB

Download
memory/1512-150-0x0000000005880000-0x00000000058A2000-memory.dmp

Filesize
136KB

Download
memory/1512-176-0x0000000007820000-0x0000000007852000-memory.dmp

Filesize
200KB

Download
memory/1512-187-0x0000000075890000-0x00000000758DC000-memory.dmp

Filesize
304KB

Download
memory/1512-149-0x0000000002F00000-0x0000000002F10000-memory.dmp

Filesize
64KB

Download
memory/1512-198-0x00000000081A0000-0x000000000881A000-memory.dmp

Filesize
6.5MB

Download
memory/1512-147-0x0000000002F00000-0x0000000002F10000-memory.dmp

Filesize
64KB

Download
memory/1512-200-0x0000000007BD0000-0x0000000007BDA000-memory.dmp

Filesize
40KB

Download
memory/1512-204-0x0000000007D90000-0x0000000007D9E000-memory.dmp

Filesize
56KB

Download
memory/3776-138-0x00000000090E0000-0x000000000917C000-memory.dmp

Filesize
624KB

Download
memory/3776-137-0x0000000002D80000-0x0000000002D90000-memory.dmp

Filesize
64KB

Download
memory/3776-133-0x0000000000880000-0x00000000009A4000-memory.dmp

Filesize
1.1MB

Download
memory/3776-136-0x00000000079F0000-0x0000000007A82000-memory.dmp

Filesize
584KB

Download
memory/3776-135-0x0000000007EE0000-0x0000000008484000-memory.dmp

Filesize
5.6MB

Download
memory/3776-134-0x0000000002D80000-0x0000000002D90000-memory.dmp

Filesize
64KB

Download
memory/4692-205-0x0000000005530000-0x0000000005540000-memory.dmp

Filesize
64KB

Download
memory/4692-153-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4692-213-0x0000000005530000-0x0000000005540000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads