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

resource	yara_rule
behavioral2/memory/4956-133-0x0000000000480000-0x0000000000492000-memory.dmp	asyncrat
behavioral2/files/0x0009000000023147-143.dat	asyncrat
behavioral2/files/0x0009000000023147-144.dat	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation	LafameBeta.exe

Executes dropped EXE 1 IoCs

pid	Process
4800	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

pid	Process
4988	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3168	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe
4956	LafameBeta.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4956	LafameBeta.exe
Token: SeDebugPrivilege	4800	Microsoftfixer.exe
Token: SeDebugPrivilege	4800	Microsoftfixer.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4956 wrote to memory of 4012	4956	LafameBeta.exe	92
PID 4956 wrote to memory of 4012	4956	LafameBeta.exe	92
PID 4956 wrote to memory of 4012	4956	LafameBeta.exe	92
PID 4956 wrote to memory of 3940	4956	LafameBeta.exe	94
PID 4956 wrote to memory of 3940	4956	LafameBeta.exe	94
PID 4956 wrote to memory of 3940	4956	LafameBeta.exe	94
PID 4012 wrote to memory of 4988	4012	cmd.exe	96
PID 4012 wrote to memory of 4988	4012	cmd.exe	96
PID 4012 wrote to memory of 4988	4012	cmd.exe	96
PID 3940 wrote to memory of 3168	3940	cmd.exe	97
PID 3940 wrote to memory of 3168	3940	cmd.exe	97
PID 3940 wrote to memory of 3168	3940	cmd.exe	97
PID 3940 wrote to memory of 4800	3940	cmd.exe	101
PID 3940 wrote to memory of 4800	3940	cmd.exe	101
PID 3940 wrote to memory of 4800	3940	cmd.exe	101

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:4956
- 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:4012
- - 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:4988
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7D72.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3940
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3168
- - C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe
    "C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4800

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\tmp7D72.tmp.bat

Filesize
158B

MD5
e3658c7b329dfcad896c4c3671a0145f

SHA1
6981470eb76733a870b7a19034a59a06adfca41d

SHA256
ae88a59038665a00cd2e6bc552776a2ac082e7e3fb99fa4265c9423bd6cc7a38

SHA512
6fd7706b1cec35e0210070c2cd095138c04dc9aa54dc4da6f8c8481e2060874621965ac9b610bea239564694e5e93a75113b3856090a1c10977a8a343f4cf4ac

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/4800-145-0x0000000004A00000-0x0000000004A10000-memory.dmp

Filesize
64KB

Download
memory/4800-146-0x0000000004A00000-0x0000000004A10000-memory.dmp

Filesize
64KB

Download
memory/4800-147-0x0000000005AE0000-0x0000000006084000-memory.dmp

Filesize
5.6MB

Download
memory/4956-133-0x0000000000480000-0x0000000000492000-memory.dmp

Filesize
72KB

Download
memory/4956-134-0x0000000004DE0000-0x0000000004DF0000-memory.dmp

Filesize
64KB

Download
memory/4956-135-0x0000000004EF0000-0x0000000004F56000-memory.dmp

Filesize
408KB

Download
memory/4956-136-0x0000000005380000-0x000000000541C000-memory.dmp

Filesize
624KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads