asyncrat | 8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689

General

Target

8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689.exe
Size

74KB
MD5

8426efde5119f38f7436dc6170635bae
SHA1

1f68a03059e2b27b1b4529f906fe7336a743b2ac
SHA256

8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689
SHA512

8c1a0338f9b53657866eb5b8f2b1e9a736877ee599a38ad6c956eec2062a4b62501b03893b93d9995c062f8c90fb7901ebdf4b3a4ef2a3944629cd47f9df7e57
SSDEEP

1536:Vu2/0TceH2or2NWvKnNzebe9p0fYtr1oJdoeZ5/EAH5tO:Vu2MTceH2oKEinNKbe9uY+SoltHTO

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

opakk.hopto.org:34397

Mutex

AkzHMC1tjq5U

Attributes

delay
3
install
true
install_file
WUDFHost.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/0x000f0000000139a5-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2828	WUDFHost.exe

Loads dropped DLL 1 IoCs

pid	Process
2852	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	8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689.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	WUDFHost.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2684	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
2712	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2076	8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689.exe
2076	8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689.exe
2076	8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2076	8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689.exe
Token: SeDebugPrivilege	2828	WUDFHost.exe
Token: SeDebugPrivilege	2828	WUDFHost.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2076 wrote to memory of 2664	2076	8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689.exe	32
PID 2076 wrote to memory of 2664	2076	8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689.exe	32
PID 2076 wrote to memory of 2664	2076	8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689.exe	32
PID 2076 wrote to memory of 2664	2076	8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689.exe	32
PID 2076 wrote to memory of 2852	2076	8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689.exe	34
PID 2076 wrote to memory of 2852	2076	8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689.exe	34
PID 2076 wrote to memory of 2852	2076	8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689.exe	34
PID 2076 wrote to memory of 2852	2076	8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689.exe	34
PID 2852 wrote to memory of 2684	2852	cmd.exe	37
PID 2852 wrote to memory of 2684	2852	cmd.exe	37
PID 2852 wrote to memory of 2684	2852	cmd.exe	37
PID 2852 wrote to memory of 2684	2852	cmd.exe	37
PID 2664 wrote to memory of 2712	2664	cmd.exe	36
PID 2664 wrote to memory of 2712	2664	cmd.exe	36
PID 2664 wrote to memory of 2712	2664	cmd.exe	36
PID 2664 wrote to memory of 2712	2664	cmd.exe	36
PID 2852 wrote to memory of 2828	2852	cmd.exe	38
PID 2852 wrote to memory of 2828	2852	cmd.exe	38
PID 2852 wrote to memory of 2828	2852	cmd.exe	38
PID 2852 wrote to memory of 2828	2852	cmd.exe	38

C:\Users\Admin\AppData\Local\Temp\8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689.exe
"C:\Users\Admin\AppData\Local\Temp\8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2076
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WUDFHost" /tr '"C:\Users\Admin\AppData\Roaming\WUDFHost.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2664
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "WUDFHost" /tr '"C:\Users\Admin\AppData\Roaming\WUDFHost.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2712
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpF1AF.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2852
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2684
- - C:\Users\Admin\AppData\Roaming\WUDFHost.exe
    "C:\Users\Admin\AppData\Roaming\WUDFHost.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2828

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\tmpF1AF.tmp.bat

Filesize
152B

MD5
e78f98dc75e776568c1cc687d17c30b1

SHA1
522933b30a95a2cfbc96f78fdd3d68e8bf18171f

SHA256
1a62f64fb76515ec4fbffeb98c253038e4fcf6d4e62d191964e59f75c1976908

SHA512
35b2c56fc4fed5bb12104d25b689c0c5109dd010e31c119014d5bb3bffa2ff1c3ced71afe91afcaecd2805d2324b76eab0f6e2d28aab893dfc3e94b84b7c22ae

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

Filesize
74KB

MD5
8426efde5119f38f7436dc6170635bae

SHA1
1f68a03059e2b27b1b4529f906fe7336a743b2ac

SHA256
8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689

SHA512
8c1a0338f9b53657866eb5b8f2b1e9a736877ee599a38ad6c956eec2062a4b62501b03893b93d9995c062f8c90fb7901ebdf4b3a4ef2a3944629cd47f9df7e57

Download Submit
memory/2076-0-0x000000007424E000-0x000000007424F000-memory.dmp

Filesize
4KB

Download
memory/2076-1-0x00000000012D0000-0x00000000012E8000-memory.dmp

Filesize
96KB

Download
memory/2076-2-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/2076-12-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/2828-16-0x00000000008B0000-0x00000000008C8000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads