asyncrat | 3f21e6ce696e5f916325689de5abbe3bf6dad708e2da3b8f922c6c38d52ff62d

General

Target

2.exe
Size

63KB
MD5

e9ff73f7ac9cdfda1750c9bd02690da0
SHA1

9ec93301947378e702d1d56d529dbe3a8e4292ef
SHA256

3f21e6ce696e5f916325689de5abbe3bf6dad708e2da3b8f922c6c38d52ff62d
SHA512

2133fa8b87893e40eccb9f1b7c733a400bc78e57e66ebbbc8f34a21428e8991ac1858dfe1056af03bd72998a7f4fd24974c5e76990b77ca9a05ea643f784d6e8
SSDEEP

1536:fJxFz3FI8Cwof4wJK7bkyyiNhGbbiwY1I35AGBZVclN:fJxFz3FI8Cwo7JK7bky/vGbbioXzY

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

fojeweb571-45302.portmap.host:45302

fojeweb571-45302.portmap.host:4782

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/0x00290000000450d9-11.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-1-5-21-4074627901-37362009-3519777259-1000\Control Panel\International\Geo\Nation	2.exe

Executes dropped EXE 1 IoCs

pid	Process
3588	windows defender firewall.exe

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

System Information Discovery
T1082

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000	taskmgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A	taskmgr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName	taskmgr.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
844	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
4044	schtasks.exe

Suspicious behavior: EnumeratesProcesses 37 IoCs

pid	Process
1544	2.exe
1544	2.exe
1544	2.exe
1544	2.exe
1544	2.exe
1544	2.exe
1544	2.exe
1544	2.exe
1544	2.exe
1544	2.exe
1544	2.exe
1544	2.exe
1544	2.exe
1544	2.exe
1544	2.exe
1544	2.exe
1544	2.exe
1544	2.exe
1544	2.exe
1544	2.exe
1544	2.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	1544	2.exe
Token: SeDebugPrivilege	3588	windows defender firewall.exe
Token: SeDebugPrivilege	1836	taskmgr.exe
Token: SeSystemProfilePrivilege	1836	taskmgr.exe
Token: SeCreateGlobalPrivilege	1836	taskmgr.exe
Token: 33	1836	taskmgr.exe
Token: SeIncBasePriorityPrivilege	1836	taskmgr.exe

Suspicious use of FindShellTrayWindow 42 IoCs

pid	Process
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe

Suspicious use of SendNotifyMessage 42 IoCs

pid	Process
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe
1836	taskmgr.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1544 wrote to memory of 1196	1544	2.exe	80
PID 1544 wrote to memory of 1196	1544	2.exe	80
PID 1544 wrote to memory of 2588	1544	2.exe	82
PID 1544 wrote to memory of 2588	1544	2.exe	82
PID 1196 wrote to memory of 4044	1196	cmd.exe	84
PID 1196 wrote to memory of 4044	1196	cmd.exe	84
PID 2588 wrote to memory of 844	2588	cmd.exe	85
PID 2588 wrote to memory of 844	2588	cmd.exe	85
PID 2588 wrote to memory of 3588	2588	cmd.exe	90
PID 2588 wrote to memory of 3588	2588	cmd.exe	90

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\2.exe
"C:\Users\Admin\AppData\Local\Temp\2.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1544
- 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:1196
- - 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:4044
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9097.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2588
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:844
- - 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:3588

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /0
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:1836

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

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp9097.tmp.bat

Filesize
169B

MD5
e794ae986c7b12a6f49a356fbd9524d8

SHA1
08832bbb3a2711be4447c4b34f9404c88043752f

SHA256
a5a19415f46d23c220b31dc126b3f1ea609fb1cbefb9ede36b8f015cdd8dc600

SHA512
576af1fd5db9b00d7294c83655ac73dbe8517900494ad53a616339d7ce8139f4d0cddbf01701bfb2a2cbcecda8c4c7d19c17636b508fc5841f9bd53bff0836e3

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

Filesize
63KB

MD5
e9ff73f7ac9cdfda1750c9bd02690da0

SHA1
9ec93301947378e702d1d56d529dbe3a8e4292ef

SHA256
3f21e6ce696e5f916325689de5abbe3bf6dad708e2da3b8f922c6c38d52ff62d

SHA512
2133fa8b87893e40eccb9f1b7c733a400bc78e57e66ebbbc8f34a21428e8991ac1858dfe1056af03bd72998a7f4fd24974c5e76990b77ca9a05ea643f784d6e8

Download Submit
memory/1544-0-0x00007FF8F1113000-0x00007FF8F1115000-memory.dmp

Filesize
8KB

Download
memory/1544-1-0x0000000000F30000-0x0000000000F46000-memory.dmp

Filesize
88KB

Download
memory/1544-2-0x00007FF8F1110000-0x00007FF8F1BD2000-memory.dmp

Filesize
10.8MB

Download
memory/1544-3-0x00007FF8F1110000-0x00007FF8F1BD2000-memory.dmp

Filesize
10.8MB

Download
memory/1544-9-0x00007FF8F1110000-0x00007FF8F1BD2000-memory.dmp

Filesize
10.8MB

Download
memory/1836-15-0x0000015A6C460000-0x0000015A6C461000-memory.dmp

Filesize
4KB

Download
memory/1836-13-0x0000015A6C460000-0x0000015A6C461000-memory.dmp

Filesize
4KB

Download
memory/1836-14-0x0000015A6C460000-0x0000015A6C461000-memory.dmp

Filesize
4KB

Download
memory/1836-25-0x0000015A6C460000-0x0000015A6C461000-memory.dmp

Filesize
4KB

Download
memory/1836-24-0x0000015A6C460000-0x0000015A6C461000-memory.dmp

Filesize
4KB

Download
memory/1836-23-0x0000015A6C460000-0x0000015A6C461000-memory.dmp

Filesize
4KB

Download
memory/1836-22-0x0000015A6C460000-0x0000015A6C461000-memory.dmp

Filesize
4KB

Download
memory/1836-21-0x0000015A6C460000-0x0000015A6C461000-memory.dmp

Filesize
4KB

Download
memory/1836-20-0x0000015A6C460000-0x0000015A6C461000-memory.dmp

Filesize
4KB

Download
memory/1836-19-0x0000015A6C460000-0x0000015A6C461000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads