asyncrat | 1887fa1977cff3ff0c883ec2659c06d88f344902b515bece48e599790411b1d8

General

Target

05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
Size

45KB
MD5

a7f473e14b7c3e56561ff51f87b2f279
SHA1

799bb3816916db3e6e92ff665c34e020cf444859
SHA256

05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361
SHA512

eb118655b71c4b04cc9da4de9f943b98ce9c7ca562835a39a757a4e5f333da0fdcb39c34eec0f5351855875a301078ecc96126af32c17f4f1eff512c4cdc5e69
SSDEEP

768:TuERVThg5RXWUr/+1mo2qD84lNVx1VEHUPIKFjbmgX3inm6AhL1uQHQoBDZTx:TuERVThaa2AlQKNb5XSTApHdTx

Score

10^/10

asyncrat com surrogate rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

COM Surrogate

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

127.0.0.1:1604

127.0.0.1:14576

127.0.0.1:15074

4.tcp.eu.ngrok.io:6606

4.tcp.eu.ngrok.io:7707

4.tcp.eu.ngrok.io:8808

4.tcp.eu.ngrok.io:1604

4.tcp.eu.ngrok.io:14576

4.tcp.eu.ngrok.io:15074

7.tcp.eu.ngrok.io:6606

7.tcp.eu.ngrok.io:7707

7.tcp.eu.ngrok.io:8808

7.tcp.eu.ngrok.io:1604

7.tcp.eu.ngrok.io:14576

7.tcp.eu.ngrok.io:15074

Mutex

COM Surrogate

Attributes

delay
3
install
true
install_file
Microsoftfixer.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/3192-133-0x0000000000F40000-0x0000000000F52000-memory.dmp	asyncrat
C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe	asyncrat
C:\Users\Admin\AppData\Roaming\Microsoftfixer.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:

05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000\Control Panel\International\Geo\Nation	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe

Executes dropped EXE 1 IoCs

Processes:

Microsoftfixer.exe

pid process

4472 Microsoftfixer.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). 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

4116 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

948 timeout.exe

pid	process
4472	Microsoftfixer.exe

pid	process
4116	schtasks.exe

pid	process
948	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe

pid	process
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exeMicrosoftfixer.exe

description	pid	process
Token: SeDebugPrivilege	3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
Token: SeDebugPrivilege	4472	Microsoftfixer.exe
Token: SeDebugPrivilege	4472	Microsoftfixer.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.execmd.execmd.exe

description	pid	process	target process
PID 3192 wrote to memory of 3956	3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe	cmd.exe
PID 3192 wrote to memory of 3956	3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe	cmd.exe
PID 3192 wrote to memory of 3956	3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe	cmd.exe
PID 3192 wrote to memory of 3652	3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe	cmd.exe
PID 3192 wrote to memory of 3652	3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe	cmd.exe
PID 3192 wrote to memory of 3652	3192	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe	cmd.exe
PID 3956 wrote to memory of 4116	3956	cmd.exe	schtasks.exe
PID 3956 wrote to memory of 4116	3956	cmd.exe	schtasks.exe
PID 3956 wrote to memory of 4116	3956	cmd.exe	schtasks.exe
PID 3652 wrote to memory of 948	3652	cmd.exe	timeout.exe
PID 3652 wrote to memory of 948	3652	cmd.exe	timeout.exe
PID 3652 wrote to memory of 948	3652	cmd.exe	timeout.exe
PID 3652 wrote to memory of 4472	3652	cmd.exe	Microsoftfixer.exe
PID 3652 wrote to memory of 4472	3652	cmd.exe	Microsoftfixer.exe
PID 3652 wrote to memory of 4472	3652	cmd.exe	Microsoftfixer.exe

C:\Users\Admin\AppData\Local\Temp\05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
"C:\Users\Admin\AppData\Local\Temp\05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3192
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Microsoftfixer" /tr '"C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3956
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Microsoftfixer" /tr '"C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:4116
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpE43A.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3652
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:948
- - C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe
    "C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4472

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Web Service

1

T1102

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmpE43A.tmp.bat

Filesize
158B

MD5
a0bd5c1ad2a4a7b72fe795c708b75697

SHA1
18a959e7c08e6a919dceb7a286fdd5e6314c1124

SHA256
1ced53008aaf4dba8cc5a8cb15e8ec7c658424aec1196e07504467229b200c99

SHA512
d2afb4ef0080219eb71425984e186ad95747c792cfcbea5f61189c600823b7848fa69b91ef2fbbca6548e7ae701d55e8b55fd01f91ba1c852b764010e1b6c931

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

Filesize
45KB

MD5
a7f473e14b7c3e56561ff51f87b2f279

SHA1
799bb3816916db3e6e92ff665c34e020cf444859

SHA256
05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361

SHA512
eb118655b71c4b04cc9da4de9f943b98ce9c7ca562835a39a757a4e5f333da0fdcb39c34eec0f5351855875a301078ecc96126af32c17f4f1eff512c4cdc5e69

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

Filesize
45KB

MD5
a7f473e14b7c3e56561ff51f87b2f279

SHA1
799bb3816916db3e6e92ff665c34e020cf444859

SHA256
05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361

SHA512
eb118655b71c4b04cc9da4de9f943b98ce9c7ca562835a39a757a4e5f333da0fdcb39c34eec0f5351855875a301078ecc96126af32c17f4f1eff512c4cdc5e69

Download Submit
memory/3192-133-0x0000000000F40000-0x0000000000F52000-memory.dmp

Filesize
72KB

Download
memory/3192-134-0x0000000005910000-0x0000000005920000-memory.dmp

Filesize
64KB

Download
memory/3192-135-0x00000000059B0000-0x0000000005A16000-memory.dmp

Filesize
408KB

Download
memory/3192-136-0x0000000005E40000-0x0000000005EDC000-memory.dmp

Filesize
624KB

Download
memory/4472-145-0x0000000004AB0000-0x0000000004AC0000-memory.dmp

Filesize
64KB

Download
memory/4472-146-0x0000000004AB0000-0x0000000004AC0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads