asyncrat | f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f

General

Target

f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f.exe
Size

545KB
MD5

9c17bdda52e21d8df835cee315b506dd
SHA1

f01ccf02c4b92dc8e261da1e48f54ccd548c8af0
SHA256

f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f
SHA512

7acd79e169949ef7445230ea474a38786cda317469be340fa94b83dcf26b0025b0baff45ff37c88c632ceaef6565a503d7f19d3884c467f8d68c28f86c3f9889
SSDEEP

12288:BrMNAQs0dT4WxW+x4WrD5D4TIVz1OhZcsY:B4NAed3VJOHzY

Score

10^/10

asyncrat rat

Malware Config

Signatures

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

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\$77-sachost.exe	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

$77-sachost.exe

pid process

2852 $77-sachost.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

Processes:

timeout.exe

pid process

2808 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

Processes:

schtasks.exe

pid process

2324 schtasks.exe

pid	process
2852	$77-sachost.exe

pid	process
2808	timeout.exe

pid	process
2324	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f.exe

pid	process
2432	f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f.exe
2432	f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f.exe
2432	f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f.exe$77-sachost.exe

description	pid	process
Token: SeDebugPrivilege	2432	f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f.exe
Token: SeDebugPrivilege	2432	f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f.exe
Token: SeDebugPrivilege	2852	$77-sachost.exe
Token: SeDebugPrivilege	2852	$77-sachost.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f.execmd.execmd.exe

description	pid	process	target process
PID 2432 wrote to memory of 2668	2432	f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f.exe	cmd.exe
PID 2432 wrote to memory of 2668	2432	f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f.exe	cmd.exe
PID 2432 wrote to memory of 2668	2432	f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f.exe	cmd.exe
PID 2432 wrote to memory of 2680	2432	f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f.exe	cmd.exe
PID 2432 wrote to memory of 2680	2432	f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f.exe	cmd.exe
PID 2432 wrote to memory of 2680	2432	f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f.exe	cmd.exe
PID 2668 wrote to memory of 2324	2668	cmd.exe	schtasks.exe
PID 2668 wrote to memory of 2324	2668	cmd.exe	schtasks.exe
PID 2668 wrote to memory of 2324	2668	cmd.exe	schtasks.exe
PID 2680 wrote to memory of 2808	2680	cmd.exe	timeout.exe
PID 2680 wrote to memory of 2808	2680	cmd.exe	timeout.exe
PID 2680 wrote to memory of 2808	2680	cmd.exe	timeout.exe
PID 2680 wrote to memory of 2852	2680	cmd.exe	$77-sachost.exe
PID 2680 wrote to memory of 2852	2680	cmd.exe	$77-sachost.exe
PID 2680 wrote to memory of 2852	2680	cmd.exe	$77-sachost.exe

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\f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f.exe
"C:\Users\Admin\AppData\Local\Temp\f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2432
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "$77-sachost" /tr '"C:\Users\Admin\AppData\Roaming\$77-sachost.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2668
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "$77-sachost" /tr '"C:\Users\Admin\AppData\Roaming\$77-sachost.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2324
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp205C.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2680
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2808
- - C:\Users\Admin\AppData\Roaming\$77-sachost.exe
    "C:\Users\Admin\AppData\Roaming\$77-sachost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2852

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab3600.tmp

Filesize
67KB

MD5
2d3dcf90f6c99f47e7593ea250c9e749

SHA1
51be82be4a272669983313565b4940d4b1385237

SHA256
8714e7be9f9b6de26673d9d09bd4c9f41b1b27ae10b1d56a7ad83abd7430ebd4

SHA512
9c11dd7d448ffebe2167acde37be77d42175edacf5aaf6fb31d3bdfe6bb1f63f5fdbc9a0a2125ed9d5ce0529b6b548818c8021532e1ea6b324717cc9bec0aaa5

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp205C.tmp.bat

Filesize
155B

MD5
60d4f7583083ed6e74a35d4b022b6f6e

SHA1
1f05432663dfb85f3d3e24f737aaae9c9ad370c8

SHA256
87aa501f35b60cc11e6f8aa468ae06c9b4dfea183503b67002de8ec53aec2c01

SHA512
1e5b4829ff251917ccbcc75297b53ff156f577b99e8e8ecd4c322c79bb41aa1428f0067ec95a7d4202b56af562ed052e0b3d373e2f425dbd410a4826fd0e1686

Download Submit
C:\Users\Admin\AppData\Roaming\$77-sachost.exe

Filesize
545KB

MD5
9c17bdda52e21d8df835cee315b506dd

SHA1
f01ccf02c4b92dc8e261da1e48f54ccd548c8af0

SHA256
f8bcd12f0b30a378747069cc28aaae74d30aafc33656152ee34f818a10e8973f

SHA512
7acd79e169949ef7445230ea474a38786cda317469be340fa94b83dcf26b0025b0baff45ff37c88c632ceaef6565a503d7f19d3884c467f8d68c28f86c3f9889

Download Submit
memory/2432-0-0x000007FEF59F3000-0x000007FEF59F4000-memory.dmp

Filesize
4KB

Download
memory/2432-1-0x0000000000230000-0x00000000002BE000-memory.dmp

Filesize
568KB

Download
memory/2432-2-0x000007FEF59F0000-0x000007FEF63DC000-memory.dmp

Filesize
9.9MB

Download
memory/2432-3-0x000007FEF59F0000-0x000007FEF63DC000-memory.dmp

Filesize
9.9MB

Download
memory/2432-12-0x000007FEF59F0000-0x000007FEF63DC000-memory.dmp

Filesize
9.9MB

Download
memory/2852-17-0x00000000008B0000-0x000000000093E000-memory.dmp

Filesize
568KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads