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 6 IoCs

rat

resource	yara_rule
behavioral1/memory/2044-54-0x00000000002B0000-0x00000000002C2000-memory.dmp	asyncrat
behavioral1/files/0x000a0000000122f6-65.dat	asyncrat
behavioral1/files/0x000a0000000122f6-66.dat	asyncrat
behavioral1/files/0x000a0000000122f6-67.dat	asyncrat
behavioral1/memory/1244-68-0x0000000001260000-0x0000000001272000-memory.dmp	asyncrat
behavioral1/memory/1244-69-0x0000000000290000-0x00000000002D0000-memory.dmp	asyncrat

Executes dropped EXE 1 IoCs

pid	Process
1244	Microsoftfixer.exe

Loads dropped DLL 1 IoCs

pid	Process
1564	cmd.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
1820	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1480	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2044	LafameBeta.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2044	LafameBeta.exe
Token: SeDebugPrivilege	1244	Microsoftfixer.exe
Token: SeDebugPrivilege	1244	Microsoftfixer.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2044 wrote to memory of 760	2044	LafameBeta.exe	29
PID 2044 wrote to memory of 760	2044	LafameBeta.exe	29
PID 2044 wrote to memory of 760	2044	LafameBeta.exe	29
PID 2044 wrote to memory of 760	2044	LafameBeta.exe	29
PID 2044 wrote to memory of 1564	2044	LafameBeta.exe	31
PID 2044 wrote to memory of 1564	2044	LafameBeta.exe	31
PID 2044 wrote to memory of 1564	2044	LafameBeta.exe	31
PID 2044 wrote to memory of 1564	2044	LafameBeta.exe	31
PID 760 wrote to memory of 1820	760	cmd.exe	33
PID 760 wrote to memory of 1820	760	cmd.exe	33
PID 760 wrote to memory of 1820	760	cmd.exe	33
PID 760 wrote to memory of 1820	760	cmd.exe	33
PID 1564 wrote to memory of 1480	1564	cmd.exe	34
PID 1564 wrote to memory of 1480	1564	cmd.exe	34
PID 1564 wrote to memory of 1480	1564	cmd.exe	34
PID 1564 wrote to memory of 1480	1564	cmd.exe	34
PID 1564 wrote to memory of 1244	1564	cmd.exe	35
PID 1564 wrote to memory of 1244	1564	cmd.exe	35
PID 1564 wrote to memory of 1244	1564	cmd.exe	35
PID 1564 wrote to memory of 1244	1564	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\LafameBeta.exe
"C:\Users\Admin\AppData\Local\Temp\LafameBeta.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2044
- 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:760
- - 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:1820
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp2231.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1564
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1480
- - C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe
    "C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1244

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp2231.tmp.bat

Filesize
158B

MD5
bfac891a901c43b87f0074324b54a87e

SHA1
ef835c4b134b8810f04ee1c2294c14c005f77f63

SHA256
605b5e92b678de0a3a98a17a180b2a45342f3fe4e019acd1d55d251e9475d6fd

SHA512
d6a349ccdbbe595e86b80ca37d18ac947692e2e34bdb8e4820e58a1bbb65ffbe1c644e21e85ddc88a595601fbda1cffe2684c56a4485e55ba3dc64174f461002

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp2231.tmp.bat

Filesize
158B

MD5
bfac891a901c43b87f0074324b54a87e

SHA1
ef835c4b134b8810f04ee1c2294c14c005f77f63

SHA256
605b5e92b678de0a3a98a17a180b2a45342f3fe4e019acd1d55d251e9475d6fd

SHA512
d6a349ccdbbe595e86b80ca37d18ac947692e2e34bdb8e4820e58a1bbb65ffbe1c644e21e85ddc88a595601fbda1cffe2684c56a4485e55ba3dc64174f461002

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
\Users\Admin\AppData\Roaming\Microsoftfixer.exe

Filesize
45KB

MD5
a7f473e14b7c3e56561ff51f87b2f279

SHA1
799bb3816916db3e6e92ff665c34e020cf444859

SHA256
05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361

SHA512
eb118655b71c4b04cc9da4de9f943b98ce9c7ca562835a39a757a4e5f333da0fdcb39c34eec0f5351855875a301078ecc96126af32c17f4f1eff512c4cdc5e69

Download Submit
memory/1244-68-0x0000000001260000-0x0000000001272000-memory.dmp

Filesize
72KB

Download
memory/1244-69-0x0000000000290000-0x00000000002D0000-memory.dmp

Filesize
256KB

Download
memory/2044-54-0x00000000002B0000-0x00000000002C2000-memory.dmp

Filesize
72KB

Download
memory/2044-55-0x0000000004A90000-0x0000000004AD0000-memory.dmp

Filesize
256KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads