asyncrat | 9bf5ad18d3d5acb01cf6540b7dcca51a943c70d5da7044fae22aa00a48cc6f11

Analysis

max time kernel
40s
max time network
43s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
12/10/2026, 15:27

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General

Target
ChromeUpdate.exe
Size 111KB
Sample261012-sv3fnsb151
SHA256 9bf5ad18d3d5acb01cf6540b7dcca51a943c70d5da7044fae22aa00a48cc6f11
MD5 a9377e31fc9a2f228de13b799626cb63
SHA1 00a8f80f63884da2eb1352026480a94af4f5fe56
SHA512 20a908805af8cb3f4b299ad5776ecddc0ecc0dd6eaca3fde1b132eef90119b16ca2ac3d93d205b138cd5e2a99f02ff21207838c4e33dbe80ae5421b922cbf816
SSDEEP 1536:tu1ae1T3xq2NxxmRWu3bzXS698YDqCdWtKrqi35Rwru:tucyT3xq2Hx2Wu3bz9DXlPwru
TLSH
T1ADB3AE30EFD7B036ED6E4AFC5CA371314926A5D3250EF575FCC0329B56226C1A9322A9
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

bmb66b.com:443
bmb66b.com:80
bmb66b.com:8080
bmb66b.com:8443
www.bmb66b.com:443
www.bmb66b.com:80
www.bmb66b.com:8080
www.bmb66b.com:8443

Mutex

gmxv4ttL7GTU

Attributes

delay
3
install
true
install_file
Chrome.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x0006000000000442-10.dat	family_asyncrat

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
3312	cmd.exe
2960	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ChromeUpdate.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5188	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
3004	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\ChromeUpdate.exe
"C:\Users\Admin\AppData\Local\Temp\ChromeUpdate.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:1828
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Chrome" /tr '"C:\Users\Admin\AppData\Roaming\Chrome.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  PID:3312
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Chrome" /tr '"C:\Users\Admin\AppData\Roaming\Chrome.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3004
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5F7B.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  PID:2960
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:5188
- - C:\Users\Admin\AppData\Roaming\Chrome.exe
    "C:\Users\Admin\AppData\Roaming\Chrome.exe"
    3⤵
    PID:4792

C:\Users\Admin\AppData\Roaming\Chrome.exe
"C:\Users\Admin\AppData\Roaming\Chrome.exe"
1⤵
PID:5856

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp5F7B.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp5F7B.tmp.bat
Size 150B
SHA256 fb1e0224f48c6065a473d9ce45244423dac64f2e2e64e1254215ad6225f67754
MD5 4900fa63f911b81804bec54a0fe164b8
SHA1 b915a8f0e922dbf3500da0dcc76c9b04cc2bcf79
SHA512 efe8b1fdc540c2f022df0cc02f896973f3b53cb86d885d924124f9f5f1b3409f74a0fab86d7a0b66c9e41d8a5bac4642a10e03df36cd0f7f73a0dd652fab4866
TLSH
T17CC02B4351C6EE0E2905642303FADA8CA5B26C7B3F84BF00C344400F5380848F0DE342
MD5 SHA1 SHA512 TLSH

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Chrome.exe

Path C:\Users\Admin\AppData\Roaming\Chrome.exe
Size 111KB
SHA256 9bf5ad18d3d5acb01cf6540b7dcca51a943c70d5da7044fae22aa00a48cc6f11
MD5 a9377e31fc9a2f228de13b799626cb63
SHA1 00a8f80f63884da2eb1352026480a94af4f5fe56
SHA512 20a908805af8cb3f4b299ad5776ecddc0ecc0dd6eaca3fde1b132eef90119b16ca2ac3d93d205b138cd5e2a99f02ff21207838c4e33dbe80ae5421b922cbf816
SSDEEP 1536:tu1ae1T3xq2NxxmRWu3bzXS698YDqCdWtKrqi35Rwru:tucyT3xq2Hx2Wu3bz9DXlPwru
TLSH
T1ADB3AE30EFD7B036ED6E4AFC5CA371314926A5D3250EF575FCC0329B56226C1A9322A9
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1828-0-0x0000000075182000-0x0000000075183000-memory.dmp

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memory/1828-1-0x0000000000470000-0x0000000000492000-memory.dmp

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memory/1828-2-0x0000000075170000-0x000000007592C000-memory.dmp

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memory/1828-3-0x0000000004F80000-0x000000000501C000-memory.dmp

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memory/1828-9-0x0000000075170000-0x000000007592C000-memory.dmp

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memory/5856-12-0x0000000075170000-0x000000007592C000-memory.dmp

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memory/5856-14-0x0000000075170000-0x000000007592C000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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