asyncrat | b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565

General

Target

b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565.exe
Size

45KB
MD5

6d4e11b968c8b8bcb58c5d18fdbec947
SHA1

70806a98131536c7b910139115697fccb7ee35ab
SHA256

b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565
SHA512

43696ceb0285657281fd34ee78fdef13226b8ab6218592eb0488f68bbfd82e91734d5254a54ee8148ac7a0d1839f3072c11295d0ae839151b03fd25efc835f05
SSDEEP

768:nugPNTjgkH7F7WUHw9pmo2q7deeXKOZTN8/nPI6EzjbZgX3i7yAcsyi21cYBDZKx:nugPNTcI42Te3TNKA6E3b2XS7yZiscea

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

192.168.43.113:6606

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
TOOL.exe
install_folder
%AppData%

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/0x000700000001211a-14.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2624	TOOL.exe

Loads dropped DLL 1 IoCs

pid	Process
2732	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	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	TOOL.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2988	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
2364	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
3068	b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565.exe
3068	b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565.exe
3068	b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3068	b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565.exe
Token: SeDebugPrivilege	2624	TOOL.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3068 wrote to memory of 2812	3068	b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565.exe	30
PID 3068 wrote to memory of 2812	3068	b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565.exe	30
PID 3068 wrote to memory of 2812	3068	b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565.exe	30
PID 3068 wrote to memory of 2812	3068	b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565.exe	30
PID 3068 wrote to memory of 2732	3068	b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565.exe	32
PID 3068 wrote to memory of 2732	3068	b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565.exe	32
PID 3068 wrote to memory of 2732	3068	b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565.exe	32
PID 3068 wrote to memory of 2732	3068	b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565.exe	32
PID 2812 wrote to memory of 2364	2812	cmd.exe	34
PID 2812 wrote to memory of 2364	2812	cmd.exe	34
PID 2812 wrote to memory of 2364	2812	cmd.exe	34
PID 2812 wrote to memory of 2364	2812	cmd.exe	34
PID 2732 wrote to memory of 2988	2732	cmd.exe	35
PID 2732 wrote to memory of 2988	2732	cmd.exe	35
PID 2732 wrote to memory of 2988	2732	cmd.exe	35
PID 2732 wrote to memory of 2988	2732	cmd.exe	35
PID 2732 wrote to memory of 2624	2732	cmd.exe	36
PID 2732 wrote to memory of 2624	2732	cmd.exe	36
PID 2732 wrote to memory of 2624	2732	cmd.exe	36
PID 2732 wrote to memory of 2624	2732	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565.exe
"C:\Users\Admin\AppData\Local\Temp\b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3068
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "TOOL" /tr '"C:\Users\Admin\AppData\Roaming\TOOL.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2812
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "TOOL" /tr '"C:\Users\Admin\AppData\Roaming\TOOL.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2364
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp9F99.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2732
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2988
- - C:\Users\Admin\AppData\Roaming\TOOL.exe
    "C:\Users\Admin\AppData\Roaming\TOOL.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2624

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\tmp9F99.tmp.bat

Filesize
148B

MD5
8d42a4760ad565be1ea4a0321da3b6f1

SHA1
9d901c8417af18f050df650804df53bd25063631

SHA256
0e655066f746525e50da3254cf966448d0166604c0970bc1f5be1779d0860395

SHA512
e1b357c1a8df4099f5e76c9eb0013f35250a2e2e837cdf3fad4952deed4dceb4682d7f169c13e075c08e073469d72472c42bdaea7b20bd0e2fcf2fae21e20917

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

Filesize
45KB

MD5
6d4e11b968c8b8bcb58c5d18fdbec947

SHA1
70806a98131536c7b910139115697fccb7ee35ab

SHA256
b876529297c2bdf41a81d9d11bf4755257e69db50ed756b80792896cab59a565

SHA512
43696ceb0285657281fd34ee78fdef13226b8ab6218592eb0488f68bbfd82e91734d5254a54ee8148ac7a0d1839f3072c11295d0ae839151b03fd25efc835f05

Download Submit
memory/2624-16-0x0000000000360000-0x0000000000372000-memory.dmp

Filesize
72KB

Download
memory/3068-0-0x000000007491E000-0x000000007491F000-memory.dmp

Filesize
4KB

Download
memory/3068-1-0x0000000000AF0000-0x0000000000B02000-memory.dmp

Filesize
72KB

Download
memory/3068-2-0x0000000074910000-0x0000000074FFE000-memory.dmp

Filesize
6.9MB

Download
memory/3068-12-0x0000000074910000-0x0000000074FFE000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads