asyncrat | 6e4fab8f630c6a82812d1aa604df63a5cd7e6dea9706556c29e4c04bd558cb6b

General

Target
tmph6cquyx7.exe
Size 45KB
Sample260602-klt4yaav3m
SHA256 6e4fab8f630c6a82812d1aa604df63a5cd7e6dea9706556c29e4c04bd558cb6b
MD5 ee27d0d5bc1f59c61bfe7ba8d5ee8319
SHA1 7390713e16005c81024fefa52286920f219db4c0
SHA512 e0e7291fcbe7158e8309d2f2189c68797b5c88ce48e812a752c463b63571dceb5ca83ea7704e3ca5dcf7ba89eb5f2ca25fc041979929a5b3517f7ce631668fb5
SSDEEP 768:puNA/9T85LafWUzvSdmo2qIEK1YJBOPIxq7zjbLgG3i6cj63jhxBBBz/3BDZ7x:puNA/9T8p72/iz3xS3b0GSfjajFpd7x
TLSH
T1F2232C0037E8822BF2BE4F7899F26105467AF6673603D58D1CC452DB5613FC68A52AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

mygraded.co.uk:443
mygraded.co.uk:80
mygraded.co.uk:7797
mygraded.co.uk:8707
mygraded.co.uk:6620
www.mygraded.co.uk:443
www.mygraded.co.uk:80
www.mygraded.co.uk:7797
www.mygraded.co.uk:8707
www.mygraded.co.uk:6620
ursnif.mygraded.co.uk:443
ursnif.mygraded.co.uk:80
ursnif.mygraded.co.uk:7797
ursnif.mygraded.co.uk:8707
ursnif.mygraded.co.uk:6620
mirai.mygraded.co.uk:443
mirai.mygraded.co.uk:80
mirai.mygraded.co.uk:7797
mirai.mygraded.co.uk:8707
mirai.mygraded.co.uk:6620

Mutex

oafFB6abMrfW

Attributes

delay
0
install
true
install_file
aos23m.exe
install_folder
%AppData%

aes.plain

Signatures

Family: AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral3/files/0x001a00000002b48a-8.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1416	aos23m.exe
3484	aos23m.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 7 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	tmph6cquyx7.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	aos23m.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	aos23m.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3096	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
3020	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
4872	tmph6cquyx7.exe
4872	tmph6cquyx7.exe
4872	tmph6cquyx7.exe
4872	tmph6cquyx7.exe
4872	tmph6cquyx7.exe
4872	tmph6cquyx7.exe
4872	tmph6cquyx7.exe
4872	tmph6cquyx7.exe
4872	tmph6cquyx7.exe
4872	tmph6cquyx7.exe
4872	tmph6cquyx7.exe
4872	tmph6cquyx7.exe
4872	tmph6cquyx7.exe
4872	tmph6cquyx7.exe
4872	tmph6cquyx7.exe
4872	tmph6cquyx7.exe
4872	tmph6cquyx7.exe
4872	tmph6cquyx7.exe
4872	tmph6cquyx7.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4872	tmph6cquyx7.exe
Token: SeDebugPrivilege	1416	aos23m.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4872 wrote to memory of 3968	4872	tmph6cquyx7.exe	80
PID 4872 wrote to memory of 4552	4872	tmph6cquyx7.exe	81
PID 3968 wrote to memory of 3020	3968	cmd.exe	84
PID 4552 wrote to memory of 3096	4552	cmd.exe	85
PID 4552 wrote to memory of 3484	4552	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\tmph6cquyx7.exe
"C:\Users\Admin\AppData\Local\Temp\tmph6cquyx7.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4872
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "aos23m" /tr '"C:\Users\Admin\AppData\Roaming\aos23m.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3968
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "aos23m" /tr '"C:\Users\Admin\AppData\Roaming\aos23m.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3020
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA14C.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4552
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3096
- - C:\Users\Admin\AppData\Roaming\aos23m.exe
    "C:\Users\Admin\AppData\Roaming\aos23m.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3484

C:\Users\Admin\AppData\Roaming\aos23m.exe
"C:\Users\Admin\AppData\Roaming\aos23m.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1416

Network

MITRE ATT&CK Enterprise v16

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

tmpA14C.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpA14C.tmp.bat
Size 150B
SHA256 6672adbd7f861e1e3a87ee83aa0a623c01adc9740f0d3250340708dc365f0959
MD5 73682efc8f968ed8091a28d3078487f0
SHA1 4018fa00d2353345e5155f8cd63e6eb6649b2ee0
SHA512 d4e208ce8bdc6ef0d1b86086019b6b3d7dd2f70ac8603beca9221d74e8bf8e221ae6cadbcf6eb9a874418431e2d0185087250756834e77233d57d807949ba8b6
TLSH
T1FEC02B9261C9EA9E3945542302FBD49DA1726D193F48FB00C308850D13C045CF0D9341
MD5 SHA1 SHA512 TLSH

Submit Download

aos23m.exe

Path C:\Users\Admin\AppData\Roaming\aos23m.exe
Size 45KB
SHA256 6e4fab8f630c6a82812d1aa604df63a5cd7e6dea9706556c29e4c04bd558cb6b
MD5 ee27d0d5bc1f59c61bfe7ba8d5ee8319
SHA1 7390713e16005c81024fefa52286920f219db4c0
SHA512 e0e7291fcbe7158e8309d2f2189c68797b5c88ce48e812a752c463b63571dceb5ca83ea7704e3ca5dcf7ba89eb5f2ca25fc041979929a5b3517f7ce631668fb5
SSDEEP 768:puNA/9T85LafWUzvSdmo2qIEK1YJBOPIxq7zjbLgG3i6cj63jhxBBBz/3BDZ7x:puNA/9T8p72/iz3xS3b0GSfjajFpd7x
TLSH
T1F2232C0037E8822BF2BE4F7899F26105467AF6673603D58D1CC452DB5613FC68A52AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4872-0-0x0000000000AA0000-0x0000000000AB2000-memory.dmp

Download

memory/4872-1-0x0000000005650000-0x0000000005660000-memory.dmp

Download

memory/4872-2-0x00000000055B0000-0x000000000564C000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads