asyncrat | 05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361

General

Target

LafameBeta.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/1668-133-0x0000000000F50000-0x0000000000F62000-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:

LafameBeta.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	LafameBeta.exe

Executes dropped EXE 1 IoCs

Processes:

Microsoftfixer.exe

pid process

3384 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

3620 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2508 timeout.exe

pid	process
3384	Microsoftfixer.exe

pid	process
3620	schtasks.exe

pid	process
2508	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

LafameBeta.exe

pid	process
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe
1668	LafameBeta.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

LafameBeta.exeMicrosoftfixer.exe

description	pid	process
Token: SeDebugPrivilege	1668	LafameBeta.exe
Token: SeDebugPrivilege	3384	Microsoftfixer.exe
Token: SeDebugPrivilege	3384	Microsoftfixer.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

LafameBeta.execmd.execmd.exe

description	pid	process	target process
PID 1668 wrote to memory of 4936	1668	LafameBeta.exe	cmd.exe
PID 1668 wrote to memory of 4936	1668	LafameBeta.exe	cmd.exe
PID 1668 wrote to memory of 4936	1668	LafameBeta.exe	cmd.exe
PID 1668 wrote to memory of 3788	1668	LafameBeta.exe	cmd.exe
PID 1668 wrote to memory of 3788	1668	LafameBeta.exe	cmd.exe
PID 1668 wrote to memory of 3788	1668	LafameBeta.exe	cmd.exe
PID 4936 wrote to memory of 3620	4936	cmd.exe	schtasks.exe
PID 4936 wrote to memory of 3620	4936	cmd.exe	schtasks.exe
PID 4936 wrote to memory of 3620	4936	cmd.exe	schtasks.exe
PID 3788 wrote to memory of 2508	3788	cmd.exe	timeout.exe
PID 3788 wrote to memory of 2508	3788	cmd.exe	timeout.exe
PID 3788 wrote to memory of 2508	3788	cmd.exe	timeout.exe
PID 3788 wrote to memory of 3384	3788	cmd.exe	Microsoftfixer.exe
PID 3788 wrote to memory of 3384	3788	cmd.exe	Microsoftfixer.exe
PID 3788 wrote to memory of 3384	3788	cmd.exe	Microsoftfixer.exe

C:\Users\Admin\AppData\Local\Temp\LafameBeta.exe
"C:\Users\Admin\AppData\Local\Temp\LafameBeta.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1668

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:4936

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:3620

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9FCF.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:3788

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:2508

C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe
"C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3384

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp9FCF.tmp.bat
Filesize
158B

MD5
bffab8eeb9555143f1981fc5dc73580d

SHA1
a763bdb17123f68bb197cbd3ca5d7212e90f1026

SHA256
6be930403b27a9d5be1679710a25556311d39f239fe50fc14de6a752fbbce2e8

SHA512
7f97b095f8b279da9a58558da351ce21779f6ce85c104f1951cad8c26c5b8b14a2a9ea68420c8bea1709ad48a4b07040a8b0da297eb2b012467f7a7f9a4502f0

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/1668-133-0x0000000000F50000-0x0000000000F62000-memory.dmp

Filesize
72KB

Download
memory/1668-134-0x0000000005870000-0x0000000005880000-memory.dmp

Filesize
64KB

Download
memory/1668-135-0x0000000005BF0000-0x0000000005C56000-memory.dmp

Filesize
408KB

Download
memory/1668-136-0x0000000006080000-0x000000000611C000-memory.dmp

Filesize
624KB

Download
memory/3384-145-0x0000000005460000-0x0000000005470000-memory.dmp

Filesize
64KB

Download
memory/3384-146-0x0000000005460000-0x0000000005470000-memory.dmp

Filesize
64KB

Download
memory/3384-147-0x00000000064B0000-0x0000000006A54000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads