asyncrat | d1f44ff6dc3ccb05ed82fb0ff2829efd4a5f01c87b7b8153116647878e664aad

General

Target

2216-43-0x0000000005150000-0x0000000005162000-memory.exe
Size

72KB
MD5

0f27885446ee41b884be8590e073a57a
SHA1

0151684fec6e3315bf644394e58ba862a5fcbe11
SHA256

d1f44ff6dc3ccb05ed82fb0ff2829efd4a5f01c87b7b8153116647878e664aad
SHA512

181897b7ba3b9c62062011f441c0d0c9f60d646c8a67b5dd99309d9022cc7f8b1f94aa285bb66b92ebdc448a269b05021ffb9403a34f7f9be53d0bc6decfa36b
SSDEEP

768:/ukzVT0kLd3WULgPdVmo2qDJCXOmt/PIizjb5gX3iz0LJsayEoZgtWkBDZix:/ukzVT0Mq12kX/i3bWXSzWs3gjdix

Score

10^/10

asyncrat default credential_access discovery rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

192.228.105.2:7707

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
svchst.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 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x00050000000229db-11.dat	family_asyncrat

Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-701583114-2636601053-947405450-1000\Control Panel\International\Geo\Nation	2216-43-0x0000000005150000-0x0000000005162000-memory.exe

Executes dropped EXE 1 IoCs

pid	Process
4768	svchst.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchst.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3180	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2244	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
Token: SeDebugPrivilege	4768	svchst.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1916 wrote to memory of 808	1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe	90
PID 1916 wrote to memory of 808	1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe	90
PID 1916 wrote to memory of 808	1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe	90
PID 1916 wrote to memory of 4924	1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe	92
PID 1916 wrote to memory of 4924	1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe	92
PID 1916 wrote to memory of 4924	1916	2216-43-0x0000000005150000-0x0000000005162000-memory.exe	92
PID 808 wrote to memory of 2244	808	cmd.exe	94
PID 808 wrote to memory of 2244	808	cmd.exe	94
PID 808 wrote to memory of 2244	808	cmd.exe	94
PID 4924 wrote to memory of 3180	4924	cmd.exe	95
PID 4924 wrote to memory of 3180	4924	cmd.exe	95
PID 4924 wrote to memory of 3180	4924	cmd.exe	95
PID 4924 wrote to memory of 4768	4924	cmd.exe	98
PID 4924 wrote to memory of 4768	4924	cmd.exe	98
PID 4924 wrote to memory of 4768	4924	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\2216-43-0x0000000005150000-0x0000000005162000-memory.exe
"C:\Users\Admin\AppData\Local\Temp\2216-43-0x0000000005150000-0x0000000005162000-memory.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1916
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchst" /tr '"C:\Users\Admin\AppData\Roaming\svchst.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:808
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchst" /tr '"C:\Users\Admin\AppData\Roaming\svchst.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2244
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCFA4.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4924
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3180
- - C:\Users\Admin\AppData\Roaming\svchst.exe
    "C:\Users\Admin\AppData\Roaming\svchst.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:4768

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpCFA4.tmp.bat

Filesize
150B

MD5
cce84a8b756ec46eb1af5d2adf5d1905

SHA1
6febf3b934cb7245426fab930b10fa96656c3bd8

SHA256
1d8da4bc83031f252830e91281754e2cc61ddaa45cea500d917b7f1acabed8d5

SHA512
60505955cfc09a244df42091d13d5f2902b3773c0ecb421c422b1a772c944941640c9dfe28cc06b6d3ae47315b788a1b89e0c4861f531fe8e5aed81086568dc6

Download Submit
C:\Users\Admin\AppData\Roaming\svchst.exe

Filesize
72KB

MD5
0f27885446ee41b884be8590e073a57a

SHA1
0151684fec6e3315bf644394e58ba862a5fcbe11

SHA256
d1f44ff6dc3ccb05ed82fb0ff2829efd4a5f01c87b7b8153116647878e664aad

SHA512
181897b7ba3b9c62062011f441c0d0c9f60d646c8a67b5dd99309d9022cc7f8b1f94aa285bb66b92ebdc448a269b05021ffb9403a34f7f9be53d0bc6decfa36b

Download Submit
memory/1916-0-0x000000007452E000-0x000000007452F000-memory.dmp

Filesize
4KB

Download
memory/1916-1-0x00000000005B0000-0x00000000005C2000-memory.dmp

Filesize
72KB

Download
memory/1916-2-0x0000000074520000-0x0000000074CD0000-memory.dmp

Filesize
7.7MB

Download
memory/1916-3-0x0000000004F70000-0x000000000500C000-memory.dmp

Filesize
624KB

Download
memory/1916-8-0x0000000074520000-0x0000000074CD0000-memory.dmp

Filesize
7.7MB

Download
memory/4768-16-0x0000000006380000-0x0000000006924000-memory.dmp

Filesize
5.6MB

Download
memory/4768-13-0x0000000074490000-0x0000000074C40000-memory.dmp

Filesize
7.7MB

Download
memory/4768-17-0x0000000005EA0000-0x0000000005F06000-memory.dmp

Filesize
408KB

Download
memory/4768-18-0x0000000074490000-0x0000000074C40000-memory.dmp

Filesize
7.7MB

Download
memory/4768-19-0x0000000007070000-0x00000000070E6000-memory.dmp

Filesize
472KB

Download
memory/4768-20-0x0000000006FF0000-0x000000000706E000-memory.dmp

Filesize
504KB

Download
memory/4768-21-0x0000000007120000-0x000000000713E000-memory.dmp

Filesize
120KB

Download
memory/4768-22-0x00000000071B0000-0x0000000007504000-memory.dmp

Filesize
3.3MB

Download
memory/4768-23-0x0000000007190000-0x000000000719A000-memory.dmp

Filesize
40KB

Download
memory/4768-24-0x0000000007590000-0x0000000007620000-memory.dmp

Filesize
576KB

Download
memory/4768-25-0x00000000077D0000-0x0000000007830000-memory.dmp

Filesize
384KB

Download
memory/4768-26-0x0000000007830000-0x000000000787C000-memory.dmp

Filesize
304KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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