asyncrat | c03f149cdbbcb2c095f92061cecff35bdbde6b3700cfa75ef0e5b12e9929c3bf

General

Target

1.exe
Size

63KB
MD5

cf90a4de10e208d956569255917251fa
SHA1

1002b35498b701bb9542aed54c77bc4e66a953ba
SHA256

c03f149cdbbcb2c095f92061cecff35bdbde6b3700cfa75ef0e5b12e9929c3bf
SHA512

abcb7bc570d5e31478a2e05b9d1c95b8ea076b1d4d7ce370c781ba0879a6ba9fcbc828d4a12ed8ece8751e8457e0351a3a6807301a5b6fe41d4118ffdf8a7cb6
SSDEEP

1536:fJxFz3FI8Cwof4wJK7bkyyiNXGbbrwrcqmnGBZVclN:fJxFz3FI8Cwo7JK7bky/JGbbrmDzY

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

fojeweb571-45302.portmap.host:45302

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
install
true
install_file
windows defender firewall.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/0x0008000000023cb1-11.dat	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	1.exe

Executes dropped EXE 1 IoCs

pid	Process
5116	windows defender firewall.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4056	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
1392	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe
3256	1.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3256	1.exe
Token: SeDebugPrivilege	5116	windows defender firewall.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3256 wrote to memory of 3264	3256	1.exe	83
PID 3256 wrote to memory of 3264	3256	1.exe	83
PID 3256 wrote to memory of 3384	3256	1.exe	84
PID 3256 wrote to memory of 3384	3256	1.exe	84
PID 3264 wrote to memory of 1392	3264	cmd.exe	87
PID 3264 wrote to memory of 1392	3264	cmd.exe	87
PID 3384 wrote to memory of 4056	3384	cmd.exe	88
PID 3384 wrote to memory of 4056	3384	cmd.exe	88
PID 3384 wrote to memory of 5116	3384	cmd.exe	89
PID 3384 wrote to memory of 5116	3384	cmd.exe	89

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\1.exe
"C:\Users\Admin\AppData\Local\Temp\1.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3256
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3264
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1392
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9FAB.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3384
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4056
- - C:\Users\Admin\AppData\Roaming\windows defender firewall.exe
    "C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:5116

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

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp9FAB.tmp.bat

Filesize
169B

MD5
acb8b71fa1de38fde107c86d6500b8ca

SHA1
af65f994b546aa58b8aebb5e97dd1954e04a878d

SHA256
63ef0590924399ebecf6d20cee79abd82c8e7d25fad98bc076a86a26201b40f8

SHA512
d0d35cf3eb27430053287545720aa8586fe56918adc4b17e09503da11db00a5eeaaaff36f1cffd7e5d61a1a600412f45c87a4478b16e920b69afd3edb42a03ca

Download Submit
C:\Users\Admin\AppData\Roaming\windows defender firewall.exe

Filesize
63KB

MD5
cf90a4de10e208d956569255917251fa

SHA1
1002b35498b701bb9542aed54c77bc4e66a953ba

SHA256
c03f149cdbbcb2c095f92061cecff35bdbde6b3700cfa75ef0e5b12e9929c3bf

SHA512
abcb7bc570d5e31478a2e05b9d1c95b8ea076b1d4d7ce370c781ba0879a6ba9fcbc828d4a12ed8ece8751e8457e0351a3a6807301a5b6fe41d4118ffdf8a7cb6

Download Submit
memory/3256-1-0x0000000000060000-0x0000000000076000-memory.dmp

Filesize
88KB

Download
memory/3256-0-0x00007FF814CB3000-0x00007FF814CB5000-memory.dmp

Filesize
8KB

Download
memory/3256-2-0x00007FF814CB0000-0x00007FF815771000-memory.dmp

Filesize
10.8MB

Download
memory/3256-7-0x00007FF814CB0000-0x00007FF815771000-memory.dmp

Filesize
10.8MB

Download
memory/3256-8-0x00007FF814CB0000-0x00007FF815771000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads