asyncrat | 9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023

General

Target

9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023.exe
Size

45KB
MD5

b733e729705bf66c1e5c66d97e247701
SHA1

25eec814abdf1fc6afe621e16aa89c4eb42616b9
SHA256

9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023
SHA512

09b59b8942c1409a03ca4e7f77c6007160af4d557386b766516dba392750869c017d0fd5d6fbbfcbb3e559a70ad42adcb498595df186be180cfc04e921d74320
SSDEEP

768:Nu2/0TckJ26WUsFvgmo2q7MKjPGaG6PIyzjbFgX3iWlcF4S0ru1pYI0sBDZOx:Nu2/0TceH2ZKTkDy3bCXSWlc6SKuRjdM

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

66.66.146.74:9511

Mutex

nwJFeGdDXcL2

Attributes

delay
3
install
true
install_file
System32.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/0x0030000000018b71-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2940	System32.exe

Loads dropped DLL 1 IoCs

pid	Process
3024	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	9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	System32.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2596	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
2224	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2380	9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023.exe
2380	9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023.exe
2380	9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2380	9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023.exe
Token: SeDebugPrivilege	2940	System32.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 2892	2380	9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023.exe	30
PID 2380 wrote to memory of 2892	2380	9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023.exe	30
PID 2380 wrote to memory of 2892	2380	9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023.exe	30
PID 2380 wrote to memory of 2892	2380	9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023.exe	30
PID 2380 wrote to memory of 3024	2380	9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023.exe	32
PID 2380 wrote to memory of 3024	2380	9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023.exe	32
PID 2380 wrote to memory of 3024	2380	9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023.exe	32
PID 2380 wrote to memory of 3024	2380	9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023.exe	32
PID 2892 wrote to memory of 2224	2892	cmd.exe	34
PID 2892 wrote to memory of 2224	2892	cmd.exe	34
PID 2892 wrote to memory of 2224	2892	cmd.exe	34
PID 2892 wrote to memory of 2224	2892	cmd.exe	34
PID 3024 wrote to memory of 2596	3024	cmd.exe	35
PID 3024 wrote to memory of 2596	3024	cmd.exe	35
PID 3024 wrote to memory of 2596	3024	cmd.exe	35
PID 3024 wrote to memory of 2596	3024	cmd.exe	35
PID 3024 wrote to memory of 2940	3024	cmd.exe	36
PID 3024 wrote to memory of 2940	3024	cmd.exe	36
PID 3024 wrote to memory of 2940	3024	cmd.exe	36
PID 3024 wrote to memory of 2940	3024	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023.exe
"C:\Users\Admin\AppData\Local\Temp\9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "System32" /tr '"C:\Users\Admin\AppData\Roaming\System32.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2892
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "System32" /tr '"C:\Users\Admin\AppData\Roaming\System32.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2224
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpA016.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3024
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2596
- - C:\Users\Admin\AppData\Roaming\System32.exe
    "C:\Users\Admin\AppData\Roaming\System32.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2940

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmpA016.tmp.bat

Filesize
152B

MD5
4a1e279be3597242b447550b4a5066fa

SHA1
3c2b7ef70cfb23e180eca6ea494b81871b3152c7

SHA256
4ecf9ab536ed57bf373bd1b064dd25971ab9b80a495bee9a0677ffe6595da42d

SHA512
ad08187018a81c25e416b7fa9eab19a81d7d8597404f77315451d2e4e2cce8a6884ea26196bb2a23483cc98f1f7dcbd3bc022ba49a138b7857992672e90d3366

Download Submit
\Users\Admin\AppData\Roaming\System32.exe

Filesize
45KB

MD5
b733e729705bf66c1e5c66d97e247701

SHA1
25eec814abdf1fc6afe621e16aa89c4eb42616b9

SHA256
9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023

SHA512
09b59b8942c1409a03ca4e7f77c6007160af4d557386b766516dba392750869c017d0fd5d6fbbfcbb3e559a70ad42adcb498595df186be180cfc04e921d74320

Download Submit
memory/2380-0-0x0000000074DEE000-0x0000000074DEF000-memory.dmp

Filesize
4KB

Download
memory/2380-1-0x0000000000D90000-0x0000000000DA2000-memory.dmp

Filesize
72KB

Download
memory/2380-2-0x0000000074DE0000-0x00000000754CE000-memory.dmp

Filesize
6.9MB

Download
memory/2380-11-0x0000000074DE0000-0x00000000754CE000-memory.dmp

Filesize
6.9MB

Download
memory/2940-16-0x0000000000A30000-0x0000000000A42000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads