asyncrat | 094b57a07096fb1f866a104c0b14c84aa99815b613587780765c8c6cd6ef1a42

General

Target

AsyncClient.exe
Size

45KB
MD5

7baa4836bd81113c16960501f679a81b
SHA1

007416f9ba10d2e2951a9dcd104b7206ad20d433
SHA256

094b57a07096fb1f866a104c0b14c84aa99815b613587780765c8c6cd6ef1a42
SHA512

988035fbecccadab900f3a6bf2936b5241fa197956286c135a3921370b153e4a12fced55c7cd1760889dd63f970f3b5c37c890aa9e45fbd6afa52934face1079
SSDEEP

768:bum8n1TQwtPtWUN01nmo2qzPKjGKG6PIyzjbFgX3irARm3OCkgCdqTHBDZ3x:bum81TQq426KYDy3bCXSrARmeCkgmqTB

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

62.37.96.229:30120

192.168.1.114:30120

Mutex

6SI8OkPnk

Attributes

delay
3
install
true
install_file
RedEngine.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/808-132-0x0000000000160000-0x0000000000172000-memory.dmp	asyncrat
C:\Users\Admin\AppData\Roaming\RedEngine.exe	asyncrat
C:\Users\Admin\AppData\Roaming\RedEngine.exe	asyncrat

Executes dropped EXE 1 IoCs

Processes:

RedEngine.exe

pid process

2812 RedEngine.exe

pid	process
2812	RedEngine.exe

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:

AsyncClient.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	AsyncClient.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

1508 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4156 timeout.exe

pid	process
1508	schtasks.exe

pid	process
4156	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

AsyncClient.exe

pid	process
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe
808	AsyncClient.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

AsyncClient.exeRedEngine.exe

description pid process

Token: SeDebugPrivilege 808 AsyncClient.exe
Token: SeDebugPrivilege 2812 RedEngine.exe

description	pid	process
Token: SeDebugPrivilege	808	AsyncClient.exe
Token: SeDebugPrivilege	2812	RedEngine.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

AsyncClient.execmd.execmd.exe

description	pid	process	target process
PID 808 wrote to memory of 4800	808	AsyncClient.exe	cmd.exe
PID 808 wrote to memory of 4800	808	AsyncClient.exe	cmd.exe
PID 808 wrote to memory of 4800	808	AsyncClient.exe	cmd.exe
PID 808 wrote to memory of 4988	808	AsyncClient.exe	cmd.exe
PID 808 wrote to memory of 4988	808	AsyncClient.exe	cmd.exe
PID 808 wrote to memory of 4988	808	AsyncClient.exe	cmd.exe
PID 4988 wrote to memory of 4156	4988	cmd.exe	timeout.exe
PID 4988 wrote to memory of 4156	4988	cmd.exe	timeout.exe
PID 4988 wrote to memory of 4156	4988	cmd.exe	timeout.exe
PID 4800 wrote to memory of 1508	4800	cmd.exe	schtasks.exe
PID 4800 wrote to memory of 1508	4800	cmd.exe	schtasks.exe
PID 4800 wrote to memory of 1508	4800	cmd.exe	schtasks.exe
PID 4988 wrote to memory of 2812	4988	cmd.exe	RedEngine.exe
PID 4988 wrote to memory of 2812	4988	cmd.exe	RedEngine.exe
PID 4988 wrote to memory of 2812	4988	cmd.exe	RedEngine.exe

C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:808

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "RedEngine" /tr '"C:\Users\Admin\AppData\Roaming\RedEngine.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:4800

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "RedEngine" /tr '"C:\Users\Admin\AppData\Roaming\RedEngine.exe"'
3⤵
- Creates scheduled task(s)
PID:1508

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7F37.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:4988

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:4156

C:\Users\Admin\AppData\Roaming\RedEngine.exe
"C:\Users\Admin\AppData\Roaming\RedEngine.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2812

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\Temp\tmp7F37.tmp.bat
Filesize
153B

MD5
aec9a9bc74b93d33ed8056618ca45c25

SHA1
5bc16502d9446d57ad414d98b09a6f34da0774ae

SHA256
8d3d6a957676e784704b7d49586a4add666c485402520b54c286a751dff27179

SHA512
bbfe4b4acb7588e4c083726f02eed9165b1acb94ddc662e35aac2926c6a65fbd9539553bca20b6717b4925b3a90190bd195a98d62b46984f65ce25cb212bfd5d

Download Submit
C:\Users\Admin\AppData\Roaming\RedEngine.exe
Filesize
45KB

MD5
7baa4836bd81113c16960501f679a81b

SHA1
007416f9ba10d2e2951a9dcd104b7206ad20d433

SHA256
094b57a07096fb1f866a104c0b14c84aa99815b613587780765c8c6cd6ef1a42

SHA512
988035fbecccadab900f3a6bf2936b5241fa197956286c135a3921370b153e4a12fced55c7cd1760889dd63f970f3b5c37c890aa9e45fbd6afa52934face1079

Download Submit
C:\Users\Admin\AppData\Roaming\RedEngine.exe
Filesize
45KB

MD5
7baa4836bd81113c16960501f679a81b

SHA1
007416f9ba10d2e2951a9dcd104b7206ad20d433

SHA256
094b57a07096fb1f866a104c0b14c84aa99815b613587780765c8c6cd6ef1a42

SHA512
988035fbecccadab900f3a6bf2936b5241fa197956286c135a3921370b153e4a12fced55c7cd1760889dd63f970f3b5c37c890aa9e45fbd6afa52934face1079

Download Submit
memory/808-132-0x0000000000160000-0x0000000000172000-memory.dmp

Filesize
72KB

Download
memory/808-133-0x0000000004BE0000-0x0000000004C7C000-memory.dmp

Filesize
624KB

Download
memory/1508-138-0x0000000000000000-mapping.dmp

Download
memory/2812-139-0x0000000000000000-mapping.dmp

Download
memory/2812-142-0x00000000065E0000-0x0000000006B84000-memory.dmp

Filesize
5.6MB

Download
memory/2812-143-0x0000000005B40000-0x0000000005BA6000-memory.dmp

Filesize
408KB

Download
memory/4156-137-0x0000000000000000-mapping.dmp

Download
memory/4800-134-0x0000000000000000-mapping.dmp

Download
memory/4988-135-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads