asyncrat | b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f

General

Target

b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
Size

45KB
MD5

7ace559d317742937e8254dc6da92a7e
SHA1

e4986e5b11b96bedc62af5cfb3b48bed58d8d1c9
SHA256

b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f
SHA512

2c50337078075dc6bfd8b02d77d4de8e5b9ad5b01deed1a3b4f3eb0b2d21efce2736e74d5cf94fdf937bcc2a51c2ecf98022049c706350feacb079c4b968d5d3
SSDEEP

768:hukaVT3ongoWU2zjimo2qrrKjGKG6PIyzjbFgX3ij8z+vfYO4qHBDZMhd:hukaVT3QR2mKYDy3bCXSjlfYQdMd

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

96.248.52.125:8031

Mutex

adobe_6SI8OkPnk

Attributes

delay
3
install
true
install_file
update.exe
install_folder
%Temp%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x000300000001e75a-11.dat	family_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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe

Executes dropped EXE 1 IoCs

pid	Process
1988	update.exe

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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	update.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2264	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
3572	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
Token: SeDebugPrivilege	1988	update.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 728 wrote to memory of 3784	728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe	82
PID 728 wrote to memory of 3784	728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe	82
PID 728 wrote to memory of 3784	728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe	82
PID 728 wrote to memory of 4660	728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe	84
PID 728 wrote to memory of 4660	728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe	84
PID 728 wrote to memory of 4660	728	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe	84
PID 4660 wrote to memory of 2264	4660	cmd.exe	86
PID 4660 wrote to memory of 2264	4660	cmd.exe	86
PID 4660 wrote to memory of 2264	4660	cmd.exe	86
PID 3784 wrote to memory of 3572	3784	cmd.exe	87
PID 3784 wrote to memory of 3572	3784	cmd.exe	87
PID 3784 wrote to memory of 3572	3784	cmd.exe	87
PID 4660 wrote to memory of 1988	4660	cmd.exe	88
PID 4660 wrote to memory of 1988	4660	cmd.exe	88
PID 4660 wrote to memory of 1988	4660	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
"C:\Users\Admin\AppData\Local\Temp\b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:728
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "update" /tr '"C:\Users\Admin\AppData\Local\Temp\update.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3784
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "update" /tr '"C:\Users\Admin\AppData\Local\Temp\update.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3572
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCDEF.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4660
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2264
- - C:\Users\Admin\AppData\Local\Temp\update.exe
    "C:\Users\Admin\AppData\Local\Temp\update.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:1988

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

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
153B

MD5
31cdd5df942d3f0639f02b0eb011526e

SHA1
165f26711862c53677ba9cd7ac85693ee7544fc7

SHA256
d333435ed780d4e03af9643c71603429cf7f51e24cb09dc7bb9c0f5e48bc8109

SHA512
84907023008be811f09971c3b814789981e8ec1f0ff6bc250bb8d124a50dc95cacfd41f9ad3332cab3bdf55ad251d6a27a3dda2d49be29d6e8d0edb7fde8afd2

Download Submit
C:\Users\Admin\AppData\Local\Temp\update.exe

Filesize
45KB

MD5
7ace559d317742937e8254dc6da92a7e

SHA1
e4986e5b11b96bedc62af5cfb3b48bed58d8d1c9

SHA256
b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f

SHA512
2c50337078075dc6bfd8b02d77d4de8e5b9ad5b01deed1a3b4f3eb0b2d21efce2736e74d5cf94fdf937bcc2a51c2ecf98022049c706350feacb079c4b968d5d3

Download Submit
memory/728-0-0x00000000751FE000-0x00000000751FF000-memory.dmp

Filesize
4KB

Download
memory/728-1-0x0000000000930000-0x0000000000942000-memory.dmp

Filesize
72KB

Download
memory/728-2-0x00000000751F0000-0x00000000759A0000-memory.dmp

Filesize
7.7MB

Download
memory/728-3-0x0000000005250000-0x00000000052EC000-memory.dmp

Filesize
624KB

Download
memory/728-9-0x00000000751F0000-0x00000000759A0000-memory.dmp

Filesize
7.7MB

Download
memory/1988-13-0x0000000075150000-0x0000000075900000-memory.dmp

Filesize
7.7MB

Download
memory/1988-14-0x0000000075150000-0x0000000075900000-memory.dmp

Filesize
7.7MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads