asyncrat | 7bb046bb513f61bb2f038262e0355f239b0daefc081619cb51039bf0cf796033

General

Target

ProximaCLient.exe
Size

62KB
MD5

9b58a4fad9c0ddace097997174a11175
SHA1

aad8aaac4ac821a047d68d90bb3266d73e5f6457
SHA256

7bb046bb513f61bb2f038262e0355f239b0daefc081619cb51039bf0cf796033
SHA512

dc27a308b85434804249751deb19eb8ccbcef8c53ca5af6f662b74e41da4763593388c75216ceda66b83b5213a8c55c662d485ae70d9b9abc33bee3e053bb6ba
SSDEEP

1536:Nu2etT/+No2KISb6/N6FbbAb2FftIVZNdCwdAoeWYx:Nu2aT/+No2KISb6/N4bbAUeVZvB8px

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

31.57.243.64:6606

31.57.243.64:7707

31.57.243.64:8808

Mutex

LpF3ngSX2CvP

Attributes

delay
3
install
true
install_file
lasjiiziopjwe.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/0x000d000000012263-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2696	lasjiiziopjwe.exe

Loads dropped DLL 1 IoCs

pid	Process
2764	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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	lasjiiziopjwe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ProximaCLient.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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2932	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
2812	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2904	ProximaCLient.exe
2904	ProximaCLient.exe
2904	ProximaCLient.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2904	ProximaCLient.exe
Token: SeDebugPrivilege	2696	lasjiiziopjwe.exe
Token: SeDebugPrivilege	2696	lasjiiziopjwe.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2904 wrote to memory of 3048	2904	ProximaCLient.exe	31
PID 2904 wrote to memory of 3048	2904	ProximaCLient.exe	31
PID 2904 wrote to memory of 3048	2904	ProximaCLient.exe	31
PID 2904 wrote to memory of 3048	2904	ProximaCLient.exe	31
PID 2904 wrote to memory of 2764	2904	ProximaCLient.exe	33
PID 2904 wrote to memory of 2764	2904	ProximaCLient.exe	33
PID 2904 wrote to memory of 2764	2904	ProximaCLient.exe	33
PID 2904 wrote to memory of 2764	2904	ProximaCLient.exe	33
PID 3048 wrote to memory of 2812	3048	cmd.exe	35
PID 3048 wrote to memory of 2812	3048	cmd.exe	35
PID 3048 wrote to memory of 2812	3048	cmd.exe	35
PID 3048 wrote to memory of 2812	3048	cmd.exe	35
PID 2764 wrote to memory of 2932	2764	cmd.exe	36
PID 2764 wrote to memory of 2932	2764	cmd.exe	36
PID 2764 wrote to memory of 2932	2764	cmd.exe	36
PID 2764 wrote to memory of 2932	2764	cmd.exe	36
PID 2764 wrote to memory of 2696	2764	cmd.exe	37
PID 2764 wrote to memory of 2696	2764	cmd.exe	37
PID 2764 wrote to memory of 2696	2764	cmd.exe	37
PID 2764 wrote to memory of 2696	2764	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\ProximaCLient.exe
"C:\Users\Admin\AppData\Local\Temp\ProximaCLient.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2904
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "lasjiiziopjwe" /tr '"C:\Users\Admin\AppData\Roaming\lasjiiziopjwe.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3048
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "lasjiiziopjwe" /tr '"C:\Users\Admin\AppData\Roaming\lasjiiziopjwe.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2812
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp9195.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2764
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2932
- - C:\Users\Admin\AppData\Roaming\lasjiiziopjwe.exe
    "C:\Users\Admin\AppData\Roaming\lasjiiziopjwe.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2696

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\tmp9195.tmp.bat

Filesize
157B

MD5
5b21eae639a28b03c2daeb70a6c288fe

SHA1
ba72a0f41221859b2a312ff0a406ece6c3b88b4b

SHA256
80398cfdd8d9b6ab71f969a77363b8b908e71db365c68d3ae6f7e462bb951560

SHA512
5e0d2b96eb86b09e95e499824f5c7ef61f95f4c09ab1c9c1ade9c6310ce8df3eace8422ae4b2628ee3679f68a0788c4598609864f5d2c62f2113410359375d86

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

Filesize
62KB

MD5
9b58a4fad9c0ddace097997174a11175

SHA1
aad8aaac4ac821a047d68d90bb3266d73e5f6457

SHA256
7bb046bb513f61bb2f038262e0355f239b0daefc081619cb51039bf0cf796033

SHA512
dc27a308b85434804249751deb19eb8ccbcef8c53ca5af6f662b74e41da4763593388c75216ceda66b83b5213a8c55c662d485ae70d9b9abc33bee3e053bb6ba

Download Submit
memory/2696-16-0x0000000000980000-0x0000000000996000-memory.dmp

Filesize
88KB

Download
memory/2904-0-0x0000000074B2E000-0x0000000074B2F000-memory.dmp

Filesize
4KB

Download
memory/2904-1-0x0000000000B10000-0x0000000000B26000-memory.dmp

Filesize
88KB

Download
memory/2904-2-0x0000000074B20000-0x000000007520E000-memory.dmp

Filesize
6.9MB

Download
memory/2904-12-0x0000000074B20000-0x000000007520E000-memory.dmp

Filesize
6.9MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads