asyncrat | 7c407c323a3364e3a1f50b7a88daeaede3809e2ee4d357ee8c14aaedd55f6baf

General

Target

sigma.exe
Size

79KB
MD5

325923496f12aa073b5242339661b449
SHA1

d0fb6496f813f18111080439c933bac91507ee5c
SHA256

7c407c323a3364e3a1f50b7a88daeaede3809e2ee4d357ee8c14aaedd55f6baf
SHA512

4e7a3f7f67d2c9379b69057769727ae695c87f1a30b0cb4a53cebf513885114ed55d04fc43e7090b095225ee8613ee4d953b850152283b7eee36f1df8d1b2b6e
SSDEEP

1536:1/uk0VT3Q+2ZBXOLMuJZ+T/iib4dg9fmlAqswdcLx:puk4T3Q+2PXOLDJ0D5b4m+lAq34x

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:8808

Mutex

C3sqZENOiTGQ

Attributes

delay
3
install
true
install_file
Rat.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 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x000400000002aa01-11.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
1008	Rat.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	sigma.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
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	Rat.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4576	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
1416	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
3380	sigma.exe
3380	sigma.exe
3380	sigma.exe
3380	sigma.exe
3380	sigma.exe
3380	sigma.exe
3380	sigma.exe
3380	sigma.exe
3380	sigma.exe
3380	sigma.exe
3380	sigma.exe
3380	sigma.exe
3380	sigma.exe
3380	sigma.exe
3380	sigma.exe
3380	sigma.exe
3380	sigma.exe
3380	sigma.exe
3380	sigma.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3380	sigma.exe
Token: SeDebugPrivilege	1008	Rat.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3380 wrote to memory of 4800	3380	sigma.exe	81
PID 3380 wrote to memory of 4800	3380	sigma.exe	81
PID 3380 wrote to memory of 4800	3380	sigma.exe	81
PID 3380 wrote to memory of 4320	3380	sigma.exe	83
PID 3380 wrote to memory of 4320	3380	sigma.exe	83
PID 3380 wrote to memory of 4320	3380	sigma.exe	83
PID 4320 wrote to memory of 4576	4320	cmd.exe	85
PID 4320 wrote to memory of 4576	4320	cmd.exe	85
PID 4320 wrote to memory of 4576	4320	cmd.exe	85
PID 4800 wrote to memory of 1416	4800	cmd.exe	86
PID 4800 wrote to memory of 1416	4800	cmd.exe	86
PID 4800 wrote to memory of 1416	4800	cmd.exe	86
PID 4320 wrote to memory of 1008	4320	cmd.exe	87
PID 4320 wrote to memory of 1008	4320	cmd.exe	87
PID 4320 wrote to memory of 1008	4320	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\sigma.exe
"C:\Users\Admin\AppData\Local\Temp\sigma.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3380
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Rat" /tr '"C:\Users\Admin\AppData\Roaming\Rat.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4800
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Rat" /tr '"C:\Users\Admin\AppData\Roaming\Rat.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1416
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9952.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4320
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4576
- - C:\Users\Admin\AppData\Roaming\Rat.exe
    "C:\Users\Admin\AppData\Roaming\Rat.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:1008

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:3476

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\tmp9952.tmp.bat

Filesize
147B

MD5
b474568da0143fb02dd48ee73a51a631

SHA1
9d1c556fde7dd32bea7e47d8ac3ee1c90acbca98

SHA256
4d3b3dec51aebd7fd76af790ce27c7916e336973f0893a67ee4dbf7d46f16808

SHA512
45be840b6ae7005eada4999029b8b87a9c369ca2a877f1d1634e3445d51a6b7627bacfadd59244042ceb365b3d3ba1c392ab1bdb4afd202b9211ea6062b15368

Download Submit
C:\Users\Admin\AppData\Roaming\Rat.exe

Filesize
79KB

MD5
325923496f12aa073b5242339661b449

SHA1
d0fb6496f813f18111080439c933bac91507ee5c

SHA256
7c407c323a3364e3a1f50b7a88daeaede3809e2ee4d357ee8c14aaedd55f6baf

SHA512
4e7a3f7f67d2c9379b69057769727ae695c87f1a30b0cb4a53cebf513885114ed55d04fc43e7090b095225ee8613ee4d953b850152283b7eee36f1df8d1b2b6e

Download Submit
memory/1008-13-0x00000000746D0000-0x0000000074E81000-memory.dmp

Filesize
7.7MB

Download
memory/1008-14-0x00000000746D0000-0x0000000074E81000-memory.dmp

Filesize
7.7MB

Download
memory/3380-0-0x00000000746DE000-0x00000000746DF000-memory.dmp

Filesize
4KB

Download
memory/3380-1-0x00000000004E0000-0x00000000004FA000-memory.dmp

Filesize
104KB

Download
memory/3380-2-0x00000000746D0000-0x0000000074E81000-memory.dmp

Filesize
7.7MB

Download
memory/3380-3-0x0000000004E20000-0x0000000004EBC000-memory.dmp

Filesize
624KB

Download
memory/3380-9-0x00000000746D0000-0x0000000074E81000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads