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
behavioral1/files/0x000c00000001226b-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2856	update.exe

Loads dropped DLL 1 IoCs

pid	Process
2116	cmd.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	update.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2696	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
2320	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2032	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
2032	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2032	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
Token: SeDebugPrivilege	2856	update.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2032 wrote to memory of 2500	2032	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe	30
PID 2032 wrote to memory of 2500	2032	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe	30
PID 2032 wrote to memory of 2500	2032	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe	30
PID 2032 wrote to memory of 2500	2032	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe	30
PID 2032 wrote to memory of 2116	2032	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe	32
PID 2032 wrote to memory of 2116	2032	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe	32
PID 2032 wrote to memory of 2116	2032	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe	32
PID 2032 wrote to memory of 2116	2032	b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe	32
PID 2500 wrote to memory of 2320	2500	cmd.exe	33
PID 2500 wrote to memory of 2320	2500	cmd.exe	33
PID 2500 wrote to memory of 2320	2500	cmd.exe	33
PID 2500 wrote to memory of 2320	2500	cmd.exe	33
PID 2116 wrote to memory of 2696	2116	cmd.exe	35
PID 2116 wrote to memory of 2696	2116	cmd.exe	35
PID 2116 wrote to memory of 2696	2116	cmd.exe	35
PID 2116 wrote to memory of 2696	2116	cmd.exe	35
PID 2116 wrote to memory of 2856	2116	cmd.exe	36
PID 2116 wrote to memory of 2856	2116	cmd.exe	36
PID 2116 wrote to memory of 2856	2116	cmd.exe	36
PID 2116 wrote to memory of 2856	2116	cmd.exe	36
PID 2116 wrote to memory of 2856	2116	cmd.exe	36
PID 2116 wrote to memory of 2856	2116	cmd.exe	36
PID 2116 wrote to memory of 2856	2116	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe
"C:\Users\Admin\AppData\Local\Temp\b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2032
- 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:2500
- - 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:2320
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpA5B1.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2116
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2696
- - 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:2856

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

System Information Discovery

1

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\tmpA5B1.tmp.bat

Filesize
153B

MD5
75237f1f6b9b9973fdc1b6193ff850ef

SHA1
ab6c60921a0977462c59a12a2c1c64e1bca4d2bb

SHA256
48ec55f486396e001638aee8499a7c82c3013532b302d956e7247921e38d22e9

SHA512
c5d86dab4f6a489145fda2707e1b5c3ec0d8f75723bfc666496160be3d1ced7ede7fb3132b0af3b4d1ac2343cf613673c2952add0f6fdf1bd60d24ef84025d9a

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

Filesize
45KB

MD5
7ace559d317742937e8254dc6da92a7e

SHA1
e4986e5b11b96bedc62af5cfb3b48bed58d8d1c9

SHA256
b6c58155365a5e35952e46611fd7b43e36e256903bff2030bc07a3c6841b836f

SHA512
2c50337078075dc6bfd8b02d77d4de8e5b9ad5b01deed1a3b4f3eb0b2d21efce2736e74d5cf94fdf937bcc2a51c2ecf98022049c706350feacb079c4b968d5d3

Download Submit
memory/2032-0-0x000000007408E000-0x000000007408F000-memory.dmp

Filesize
4KB

Download
memory/2032-1-0x00000000000A0000-0x00000000000B2000-memory.dmp

Filesize
72KB

Download
memory/2032-2-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2032-11-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2856-16-0x0000000000800000-0x0000000000812000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads