asyncrat | a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283d

General

Target

a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
Size

47KB
MD5

d0f486c211c51e7968978c73a10020a0
SHA1

8ef24e6079810505b323f056a471e9963c13e72a
SHA256

a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283d
SHA512

b99dd7fd987a76d664c41b5abe5b4b5a4bd6e711425eb5a9b464fcbb96da7e254112518c4d2c2f1199970138bd5cd87148e4233a01d379f2394acae28b9a20ed
SSDEEP

768:EuXI1TAYhAVWU1LGvmo2q4KSETUvgcPI0qfiFps0bX/GVOl6krLKFOycBDZYx:EuXI1TAuP2q8K0qfAZbX/G8UL6dYx

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

147.185.221.24:40668

resolution-messages.gl.at.ply.gg:40668

Mutex

lzsTzjhhhJXe

Attributes

delay
3
install
true
install_file
Windows Temporary Storage Helper.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/0x00080000000120fe-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
3032	Windows Temporary Storage Helper.exe

Loads dropped DLL 1 IoCs

pid	Process
3052	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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Windows Temporary Storage Helper.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2768	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
2936	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2300	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2300	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2300	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2300	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
Token: SeDebugPrivilege	3032	Windows Temporary Storage Helper.exe
Token: SeDebugPrivilege	3032	Windows Temporary Storage Helper.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2300 wrote to memory of 2916	2300	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe	31
PID 2300 wrote to memory of 2916	2300	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe	31
PID 2300 wrote to memory of 2916	2300	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe	31
PID 2300 wrote to memory of 2916	2300	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe	31
PID 2300 wrote to memory of 3052	2300	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe	33
PID 2300 wrote to memory of 3052	2300	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe	33
PID 2300 wrote to memory of 3052	2300	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe	33
PID 2300 wrote to memory of 3052	2300	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe	33
PID 2916 wrote to memory of 2936	2916	cmd.exe	35
PID 2916 wrote to memory of 2936	2916	cmd.exe	35
PID 2916 wrote to memory of 2936	2916	cmd.exe	35
PID 2916 wrote to memory of 2936	2916	cmd.exe	35
PID 3052 wrote to memory of 2768	3052	cmd.exe	36
PID 3052 wrote to memory of 2768	3052	cmd.exe	36
PID 3052 wrote to memory of 2768	3052	cmd.exe	36
PID 3052 wrote to memory of 2768	3052	cmd.exe	36
PID 3052 wrote to memory of 3032	3052	cmd.exe	37
PID 3052 wrote to memory of 3032	3052	cmd.exe	37
PID 3052 wrote to memory of 3032	3052	cmd.exe	37
PID 3052 wrote to memory of 3032	3052	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
"C:\Users\Admin\AppData\Local\Temp\a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2300
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows Temporary Storage Helper" /tr '"C:\Users\Admin\AppData\Local\Temp\Windows Temporary Storage Helper.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2916
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Windows Temporary Storage Helper" /tr '"C:\Users\Admin\AppData\Local\Temp\Windows Temporary Storage Helper.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2936
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpD643.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3052
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2768
- - C:\Users\Admin\AppData\Local\Temp\Windows Temporary Storage Helper.exe
    "C:\Users\Admin\AppData\Local\Temp\Windows Temporary Storage Helper.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:3032

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\tmpD643.tmp.bat

Filesize
179B

MD5
1fb5e9d52028da6ec482bb8853719dac

SHA1
d96677e02f288c13080724dde1d730735f4e71b4

SHA256
93837785ede74a06350dca5a8141450b6dc6f2eb2ded5db06b4b88c8a30bf4b9

SHA512
1a11eb9f60ff3f48a7d674972b173c6d4331a439b6e3baa50ead22b6b18ebbd756dc4dfbaba02a123d72a58a48ce131be11b5a62c10b48b1ff946cd8c6109ab8

Download Submit
\Users\Admin\AppData\Local\Temp\Windows Temporary Storage Helper.exe

Filesize
47KB

MD5
d0f486c211c51e7968978c73a10020a0

SHA1
8ef24e6079810505b323f056a471e9963c13e72a

SHA256
a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283d

SHA512
b99dd7fd987a76d664c41b5abe5b4b5a4bd6e711425eb5a9b464fcbb96da7e254112518c4d2c2f1199970138bd5cd87148e4233a01d379f2394acae28b9a20ed

Download Submit
memory/2300-0-0x000000007416E000-0x000000007416F000-memory.dmp

Filesize
4KB

Download
memory/2300-1-0x0000000000E30000-0x0000000000E42000-memory.dmp

Filesize
72KB

Download
memory/2300-2-0x0000000074160000-0x000000007484E000-memory.dmp

Filesize
6.9MB

Download
memory/2300-11-0x0000000074160000-0x000000007484E000-memory.dmp

Filesize
6.9MB

Download
memory/3032-16-0x0000000000090000-0x00000000000A2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads