asyncrat | c633b31880ac53ee6282c0d7a7daae5c9ecc024055de85b77a17ffe9be5ebe08

General

Target

fixer.exe
Size

49KB
MD5

041086a69579dc26514645814a4bba5c
SHA1

07c7bf2bf5953ba3369ab727ff8a06e93fc2ccfd
SHA256

c633b31880ac53ee6282c0d7a7daae5c9ecc024055de85b77a17ffe9be5ebe08
SHA512

07a18aa25f2b201613e26c5c50aef20b8d2d77b2a89ac983ee00d4ed223f6dbdec424b673735baa22b76d6fb31367de912ad56e8066c8e470bcb886e1959dd77
SSDEEP

768:aBxKJlVRLxt5A0fjXiqVNcr4Lp2FimUbgCxB/yzuoxGZkpqKYhY7:f37/jXi+L7NECvyzz4kpqKmY7

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

127.0.0.1:35259

147.185.221.19:35259

Attributes

delay
1
install
true
install_file
MS_EDGE_TEMP_.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 3 IoCs

rat

resource	yara_rule
behavioral1/memory/3024-1-0x0000000000270000-0x0000000000286000-memory.dmp	family_asyncrat
behavioral1/files/0x000a000000012252-17.dat	family_asyncrat
behavioral1/memory/2584-20-0x0000000000240000-0x0000000000256000-memory.dmp	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2584	MS_EDGE_TEMP_.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2660	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2652	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3024	fixer.exe
3024	fixer.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3024	fixer.exe
Token: SeDebugPrivilege	2584	MS_EDGE_TEMP_.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3024 wrote to memory of 1708	3024	fixer.exe	28
PID 3024 wrote to memory of 1708	3024	fixer.exe	28
PID 3024 wrote to memory of 1708	3024	fixer.exe	28
PID 3024 wrote to memory of 3060	3024	fixer.exe	30
PID 3024 wrote to memory of 3060	3024	fixer.exe	30
PID 3024 wrote to memory of 3060	3024	fixer.exe	30
PID 1708 wrote to memory of 2660	1708	cmd.exe	32
PID 1708 wrote to memory of 2660	1708	cmd.exe	32
PID 1708 wrote to memory of 2660	1708	cmd.exe	32
PID 3060 wrote to memory of 2652	3060	cmd.exe	33
PID 3060 wrote to memory of 2652	3060	cmd.exe	33
PID 3060 wrote to memory of 2652	3060	cmd.exe	33
PID 3060 wrote to memory of 2584	3060	cmd.exe	34
PID 3060 wrote to memory of 2584	3060	cmd.exe	34
PID 3060 wrote to memory of 2584	3060	cmd.exe	34

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\fixer.exe
"C:\Users\Admin\AppData\Local\Temp\fixer.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3024
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "MS_EDGE_TEMP_" /tr '"C:\Users\Admin\AppData\Roaming\MS_EDGE_TEMP_.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1708
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "MS_EDGE_TEMP_" /tr '"C:\Users\Admin\AppData\Roaming\MS_EDGE_TEMP_.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:2660
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp1BBB.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3060
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2652
- - C:\Users\Admin\AppData\Roaming\MS_EDGE_TEMP_.exe
    "C:\Users\Admin\AppData\Roaming\MS_EDGE_TEMP_.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2584

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

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\tmp1BBB.tmp.bat

Filesize
157B

MD5
82ffad58c36561944eddbe346aac035c

SHA1
4f4b228f4d1452b3e61d09d5751f811dac766376

SHA256
034f972bde17f9dd2c1ff73ed7f77db94a3ed28f560b17499adfa1311c88d946

SHA512
415e89f22deff7681b2e5a66c3db953057d221dd81c858dcefb7ec91a7d629fef70310fdd1df60e14c560ab6bb9f2f5eecde0d500a944c21c701b21c1b8eb52c

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

Filesize
49KB

MD5
041086a69579dc26514645814a4bba5c

SHA1
07c7bf2bf5953ba3369ab727ff8a06e93fc2ccfd

SHA256
c633b31880ac53ee6282c0d7a7daae5c9ecc024055de85b77a17ffe9be5ebe08

SHA512
07a18aa25f2b201613e26c5c50aef20b8d2d77b2a89ac983ee00d4ed223f6dbdec424b673735baa22b76d6fb31367de912ad56e8066c8e470bcb886e1959dd77

Download Submit
memory/2584-22-0x000000001AE90000-0x000000001AF10000-memory.dmp

Filesize
512KB

Download
memory/2584-19-0x0000000000310000-0x0000000000322000-memory.dmp

Filesize
72KB

Download
memory/2584-26-0x00000000779B0000-0x0000000077B59000-memory.dmp

Filesize
1.7MB

Download
memory/2584-25-0x000000001AE90000-0x000000001AF10000-memory.dmp

Filesize
512KB

Download
memory/2584-24-0x000007FEF52F0000-0x000007FEF5CDC000-memory.dmp

Filesize
9.9MB

Download
memory/2584-23-0x00000000779B0000-0x0000000077B59000-memory.dmp

Filesize
1.7MB

Download
memory/2584-21-0x000007FEF52F0000-0x000007FEF5CDC000-memory.dmp

Filesize
9.9MB

Download
memory/2584-20-0x0000000000240000-0x0000000000256000-memory.dmp

Filesize
88KB

Download
memory/3024-13-0x000007FEF5CE0000-0x000007FEF66CC000-memory.dmp

Filesize
9.9MB

Download
memory/3024-1-0x0000000000270000-0x0000000000286000-memory.dmp

Filesize
88KB

Download
memory/3024-0-0x0000000000050000-0x0000000000062000-memory.dmp

Filesize
72KB

Download
memory/3024-14-0x00000000779B0000-0x0000000077B59000-memory.dmp

Filesize
1.7MB

Download
memory/3024-3-0x00000000004D0000-0x0000000000550000-memory.dmp

Filesize
512KB

Download
memory/3024-2-0x000007FEF5CE0000-0x000007FEF66CC000-memory.dmp

Filesize
9.9MB

Download
memory/3024-4-0x00000000779B0000-0x0000000077B59000-memory.dmp

Filesize
1.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads