asyncrat | 400c24bdb9b7dabfcd9a8a2f137550f338014d833d169c6e6f4252910fb95feb

Analysis

max time kernel
148s
max time network
133s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 06:15

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General

Target

a340d849cc988d5d06f7e30143d62c86.exe
Size

63KB
MD5

a340d849cc988d5d06f7e30143d62c86
SHA1

3bf172f21f8291c408e34ec8cedb2aa3db55861a
SHA256

0ec25e2bfb539e7fd9445ea617597e6e6d64f8c49c54f105091fc0763cc154b4
SHA512

96abc6657b576bddd6bc46d7344dc2d033cd120e8b7a569c7949f98251c7b688274f747a94f978d3d06130d9ae9fc3c72e88b265fb85be2093029d06580a2baa
SSDEEP

1536:lUFBzZBVrhJPkYUbjh9oM/JlXup4pqKmY7:l0VBV4YUbjE8JlMjz

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

127.0.0.1:3230

Attributes

delay
1
install
true
install_file
Serial_checker.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
behavioral19/files/0x000c000000012262-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2580	Serial_checker.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

defense_evasion

pid	Process
2800	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
2692	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2840	a340d849cc988d5d06f7e30143d62c86.exe
2840	a340d849cc988d5d06f7e30143d62c86.exe
2840	a340d849cc988d5d06f7e30143d62c86.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2840	a340d849cc988d5d06f7e30143d62c86.exe
Token: SeDebugPrivilege	2580	Serial_checker.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2840 wrote to memory of 2660	2840	a340d849cc988d5d06f7e30143d62c86.exe	31
PID 2840 wrote to memory of 2660	2840	a340d849cc988d5d06f7e30143d62c86.exe	31
PID 2840 wrote to memory of 2660	2840	a340d849cc988d5d06f7e30143d62c86.exe	31
PID 2660 wrote to memory of 2692	2660	cmd.exe	33
PID 2660 wrote to memory of 2692	2660	cmd.exe	33
PID 2660 wrote to memory of 2692	2660	cmd.exe	33
PID 2840 wrote to memory of 2652	2840	a340d849cc988d5d06f7e30143d62c86.exe	34
PID 2840 wrote to memory of 2652	2840	a340d849cc988d5d06f7e30143d62c86.exe	34
PID 2840 wrote to memory of 2652	2840	a340d849cc988d5d06f7e30143d62c86.exe	34
PID 2652 wrote to memory of 2800	2652	cmd.exe	36
PID 2652 wrote to memory of 2800	2652	cmd.exe	36
PID 2652 wrote to memory of 2800	2652	cmd.exe	36
PID 2652 wrote to memory of 2580	2652	cmd.exe	37
PID 2652 wrote to memory of 2580	2652	cmd.exe	37
PID 2652 wrote to memory of 2580	2652	cmd.exe	37

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\a340d849cc988d5d06f7e30143d62c86.exe
"C:\Users\Admin\AppData\Local\Temp\a340d849cc988d5d06f7e30143d62c86.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2840
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Serial_checker" /tr '"C:\Users\Admin\AppData\Roaming\Serial_checker.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2660
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Serial_checker" /tr '"C:\Users\Admin\AppData\Roaming\Serial_checker.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2692
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp788A.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2652
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2800
- - C:\Users\Admin\AppData\Roaming\Serial_checker.exe
    "C:\Users\Admin\AppData\Roaming\Serial_checker.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2580

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp788A.tmp.bat

Filesize
158B

MD5
0dadf057bcf12ff5ce8eba8401444291

SHA1
cdf667d57af509d48199bde8c5874fdf6303f795

SHA256
bf7e7312640ec275360c1a2da0fc8dbb24bb5cdbe5ee1b8df4ae47f690a76dfb

SHA512
b992a2d31156de0d4afe725743e93decdf0fc209c49a7e6190447c0b2ce33f37aa6372230034a1a472286f780ed55a3894d0873fca6906379ee59a5b6e356bfc

Download Submit
C:\Users\Admin\AppData\Roaming\Serial_checker.exe

Filesize
63KB

MD5
a340d849cc988d5d06f7e30143d62c86

SHA1
3bf172f21f8291c408e34ec8cedb2aa3db55861a

SHA256
0ec25e2bfb539e7fd9445ea617597e6e6d64f8c49c54f105091fc0763cc154b4

SHA512
96abc6657b576bddd6bc46d7344dc2d033cd120e8b7a569c7949f98251c7b688274f747a94f978d3d06130d9ae9fc3c72e88b265fb85be2093029d06580a2baa

Download Submit
memory/2580-17-0x0000000000A40000-0x0000000000A56000-memory.dmp

Filesize
88KB

Download
memory/2840-0-0x000007FEF6503000-0x000007FEF6504000-memory.dmp

Filesize
4KB

Download
memory/2840-1-0x0000000001260000-0x0000000001276000-memory.dmp

Filesize
88KB

Download
memory/2840-2-0x000007FEF6500000-0x000007FEF6EEC000-memory.dmp

Filesize
9.9MB

Download
memory/2840-13-0x000007FEF6500000-0x000007FEF6EEC000-memory.dmp

Filesize
9.9MB

Download
memory/2840-3-0x000007FEF6500000-0x000007FEF6EEC000-memory.dmp

Filesize
9.9MB

Download