asyncrat | e2be314cb5392f83e23694be4e43326f746e0067012a5f423d72b2ecc3bb1575

Resubmissions

05-06-2023 15:07

230605-shb3yshc58 10

05-06-2023 14:59

230605-scshrahc39 10

Analysis

max time kernel
135s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
05-06-2023 14:59

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General

Target

AsyncClient.exe
Size

45KB
MD5

11c12e50d5c5b0ae6578f770bfb41671
SHA1

87c61e6cad8bf6be174e087784bc5f204648ebe7
SHA256

e2be314cb5392f83e23694be4e43326f746e0067012a5f423d72b2ecc3bb1575
SHA512

b9c0a081c9c2efb87fc34877d508d0bc7a0504882fd04716535cfb6cea3e5dfe64e7ea834f444903de3f334d625f3a45c58508d68c6ee9853dd60d13e10f463a
SSDEEP

768:ju0OVTBRlc6nWUbmelmo2qjrKjGKG6PIyzjbFgX3i9PjHrVFvyrLxBDZjx:ju0OVTBnck26KYDy3bCXSpjHrVdyrrdd

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

127.0.0.1:15491

127.0.0.1:8080

195.78.54.247:15491

195.78.54.247:8080

2.tcp.eu.ngrok.io:15491

2.tcp.eu.ngrok.io:8080

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
awdawd.exe
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 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1688-133-0x0000000000E30000-0x0000000000E42000-memory.dmp	asyncrat
C:\Users\Admin\AppData\Roaming\awdawd.exe	asyncrat
C:\Users\Admin\AppData\Roaming\awdawd.exe	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:

AsyncClient.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2548970870-3691742953-3895070203-1000\Control Panel\International\Geo\Nation	AsyncClient.exe

Executes dropped EXE 1 IoCs

Processes:

awdawd.exe

pid process

4048 awdawd.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

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

2452 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

3120 timeout.exe

pid	process
4048	awdawd.exe

pid	process
2452	schtasks.exe

pid	process
3120	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

AsyncClient.exe

pid	process
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe
1688	AsyncClient.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

AsyncClient.exeawdawd.exe

description pid process

Token: SeDebugPrivilege 1688 AsyncClient.exe
Token: SeDebugPrivilege 4048 awdawd.exe

description	pid	process
Token: SeDebugPrivilege	1688	AsyncClient.exe
Token: SeDebugPrivilege	4048	awdawd.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

AsyncClient.execmd.execmd.exe

description	pid	process	target process
PID 1688 wrote to memory of 3504	1688	AsyncClient.exe	cmd.exe
PID 1688 wrote to memory of 3504	1688	AsyncClient.exe	cmd.exe
PID 1688 wrote to memory of 3504	1688	AsyncClient.exe	cmd.exe
PID 1688 wrote to memory of 3772	1688	AsyncClient.exe	cmd.exe
PID 1688 wrote to memory of 3772	1688	AsyncClient.exe	cmd.exe
PID 1688 wrote to memory of 3772	1688	AsyncClient.exe	cmd.exe
PID 3504 wrote to memory of 2452	3504	cmd.exe	schtasks.exe
PID 3504 wrote to memory of 2452	3504	cmd.exe	schtasks.exe
PID 3504 wrote to memory of 2452	3504	cmd.exe	schtasks.exe
PID 3772 wrote to memory of 3120	3772	cmd.exe	timeout.exe
PID 3772 wrote to memory of 3120	3772	cmd.exe	timeout.exe
PID 3772 wrote to memory of 3120	3772	cmd.exe	timeout.exe
PID 3772 wrote to memory of 4048	3772	cmd.exe	awdawd.exe
PID 3772 wrote to memory of 4048	3772	cmd.exe	awdawd.exe
PID 3772 wrote to memory of 4048	3772	cmd.exe	awdawd.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:1688

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "awdawd" /tr '"C:\Users\Admin\AppData\Roaming\awdawd.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:3504

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "awdawd" /tr '"C:\Users\Admin\AppData\Roaming\awdawd.exe"'
3⤵
- Creates scheduled task(s)
PID:2452

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8458.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:3772

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:3120

C:\Users\Admin\AppData\Roaming\awdawd.exe
"C:\Users\Admin\AppData\Roaming\awdawd.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4048

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

T1102

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp8458.tmp.bat
Filesize
150B

MD5
c8fdbaa73bd957945e1dc5d97294da19

SHA1
52fd28d91bd56258655faa40d8eaf34ff8f8130c

SHA256
91ec030875d748ce763994accf1837b36bf0a7c5b81d405f0633a8eb58cb27d7

SHA512
177b6a8096a3a4616f4924347e5cf35edd7f835b44fc9cb4cf69575829771e7b236772366b2fee9815651263c98cd8ff57d4b1b8f022044ec32e921d05a545c5

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

MD5
11c12e50d5c5b0ae6578f770bfb41671

SHA1
87c61e6cad8bf6be174e087784bc5f204648ebe7

SHA256
e2be314cb5392f83e23694be4e43326f746e0067012a5f423d72b2ecc3bb1575

SHA512
b9c0a081c9c2efb87fc34877d508d0bc7a0504882fd04716535cfb6cea3e5dfe64e7ea834f444903de3f334d625f3a45c58508d68c6ee9853dd60d13e10f463a

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

MD5
11c12e50d5c5b0ae6578f770bfb41671

SHA1
87c61e6cad8bf6be174e087784bc5f204648ebe7

SHA256
e2be314cb5392f83e23694be4e43326f746e0067012a5f423d72b2ecc3bb1575

SHA512
b9c0a081c9c2efb87fc34877d508d0bc7a0504882fd04716535cfb6cea3e5dfe64e7ea834f444903de3f334d625f3a45c58508d68c6ee9853dd60d13e10f463a

Download Submit
memory/1688-133-0x0000000000E30000-0x0000000000E42000-memory.dmp

Filesize
72KB

Download
memory/1688-134-0x00000000032A0000-0x00000000032B0000-memory.dmp

Filesize
64KB

Download
memory/1688-135-0x0000000005900000-0x000000000599C000-memory.dmp

Filesize
624KB

Download
memory/4048-144-0x0000000004B70000-0x0000000004B80000-memory.dmp

Filesize
64KB

Download
memory/4048-145-0x0000000004B70000-0x0000000004B80000-memory.dmp

Filesize
64KB

Download