asyncrat | 6b5c1e03cf018925d9b7e9c5089afe13578f7c56614cd689f23413c13819bdad

Analysis

max time kernel
56s
max time network
54s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
04-01-2025 03:28

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General

Target

FLXTOOLS.exe
Size

63KB
MD5

8b3affb035dc48cb81e416570ee9889a
SHA1

bb8b2cd080000afe9b35bf923897acd6df5054f3
SHA256

6b5c1e03cf018925d9b7e9c5089afe13578f7c56614cd689f23413c13819bdad
SHA512

8f221bcbdf1f9a2146c3102e7daee7e4a3877e3fd83d76bf81f9cfd323c4846da8e347ff823629113d6f867909ce3d32e8d4c9f605dac7026258dc10fff71b66
SSDEEP

768:EpDxI6PfZ778/IC8A+X3GDXKc5t+cV48Jg1+T4nSGGHmDbD0ph0oXrvRXtSuMdph:262ZBmDXHwcKUpUbqh9LdcuMdpqKmY7

Score

10^/10

asyncrat flxtools rat

Malware Config

Extracted

Family

asyncrat

Botnet

FLXTOOLS

ohio-darkness.gl.at.ply.gg:13836

Attributes

delay
1
install
true
install_file
FLXTOOLS.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/0x0008000000018710-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2636	FLXTOOLS.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
2928	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
2852	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2916	FLXTOOLS.exe
2916	FLXTOOLS.exe
2916	FLXTOOLS.exe
2916	FLXTOOLS.exe
2916	FLXTOOLS.exe
2916	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe
2636	FLXTOOLS.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2916	FLXTOOLS.exe
Token: SeDebugPrivilege	2916	FLXTOOLS.exe
Token: SeDebugPrivilege	2636	FLXTOOLS.exe
Token: SeDebugPrivilege	2636	FLXTOOLS.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2916 wrote to memory of 2816	2916	FLXTOOLS.exe	31
PID 2916 wrote to memory of 2816	2916	FLXTOOLS.exe	31
PID 2916 wrote to memory of 2816	2916	FLXTOOLS.exe	31
PID 2916 wrote to memory of 2720	2916	FLXTOOLS.exe	33
PID 2916 wrote to memory of 2720	2916	FLXTOOLS.exe	33
PID 2916 wrote to memory of 2720	2916	FLXTOOLS.exe	33
PID 2816 wrote to memory of 2852	2816	cmd.exe	35
PID 2816 wrote to memory of 2852	2816	cmd.exe	35
PID 2816 wrote to memory of 2852	2816	cmd.exe	35
PID 2720 wrote to memory of 2928	2720	cmd.exe	36
PID 2720 wrote to memory of 2928	2720	cmd.exe	36
PID 2720 wrote to memory of 2928	2720	cmd.exe	36
PID 2720 wrote to memory of 2636	2720	cmd.exe	37
PID 2720 wrote to memory of 2636	2720	cmd.exe	37
PID 2720 wrote to memory of 2636	2720	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\FLXTOOLS.exe
"C:\Users\Admin\AppData\Local\Temp\FLXTOOLS.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2916
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "FLXTOOLS" /tr '"C:\Users\Admin\AppData\Roaming\FLXTOOLS.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2816
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "FLXTOOLS" /tr '"C:\Users\Admin\AppData\Roaming\FLXTOOLS.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2852
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpBAB7.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2720
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2928
- - C:\Users\Admin\AppData\Roaming\FLXTOOLS.exe
    "C:\Users\Admin\AppData\Roaming\FLXTOOLS.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2636

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\tmpBAB7.tmp.bat

Filesize
152B

MD5
9d6d4f80dddb3fa50c891dea42393b0c

SHA1
861ba1ce1ab41ce930e55919405b214dae23fdaf

SHA256
7d53d21d0ca225e76165cdaf1777501cfe4f0409b2b5a784c82426f13256ef53

SHA512
aa47286d0f86f7a8c4769e791e8554dec1e030743e296d8ec32dcbf1352f0607d07829629981dffe0848d1366082942f7a6d3556adfda83ecbff09d9d1b57379

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

Filesize
63KB

MD5
8b3affb035dc48cb81e416570ee9889a

SHA1
bb8b2cd080000afe9b35bf923897acd6df5054f3

SHA256
6b5c1e03cf018925d9b7e9c5089afe13578f7c56614cd689f23413c13819bdad

SHA512
8f221bcbdf1f9a2146c3102e7daee7e4a3877e3fd83d76bf81f9cfd323c4846da8e347ff823629113d6f867909ce3d32e8d4c9f605dac7026258dc10fff71b66

Download Submit
memory/2636-17-0x0000000001380000-0x0000000001396000-memory.dmp

Filesize
88KB

Download
memory/2916-0-0x000007FEF67C3000-0x000007FEF67C4000-memory.dmp

Filesize
4KB

Download
memory/2916-1-0x0000000000A70000-0x0000000000A86000-memory.dmp

Filesize
88KB

Download
memory/2916-2-0x000007FEF67C0000-0x000007FEF71AC000-memory.dmp

Filesize
9.9MB

Download
memory/2916-3-0x000007FEF67C0000-0x000007FEF71AC000-memory.dmp

Filesize
9.9MB

Download
memory/2916-13-0x000007FEF67C0000-0x000007FEF71AC000-memory.dmp

Filesize
9.9MB

Download