asyncrat | 6b701aa88fcb0eeb6597509cf42e0a15d90198e75e7032cee4cbcec2a4221bfe

Analysis

max time kernel
60s
max time network
61s
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, 19:40

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General

Target
6b701aa88fcb0eeb6597509cf42e0a15d90198e75e7032cee4cbcec2a4221bfe.exe
Size 45KB
Sample261012-ydlpgset7t
SHA256 6b701aa88fcb0eeb6597509cf42e0a15d90198e75e7032cee4cbcec2a4221bfe
MD5 362bf4809003e400ec3852f2ed0248fc
SHA1 07664d612038c90bccbd8125a0e50e97752d851c
SHA512 426f6855e5b2f99cd8a4ff823d1075f9cd2dee656d5382adae9336e7c1b449b78b01387000fddc810d6350d3266584e79cf2e04fd16a5466aa4c4508a2921cdc
SSDEEP 768:luI1tT/w70kWUquzumo2qzEKjPGaG6PIyzjbFgX3iuBEXS7BDZWx:luI1tT/kW2tKTkDy3bCXSoEXStdWx
TLSH
T194232C003BE9822BF2BE4BB89CF26145467AF6A32603D54D2CC451D75713FC69A426FE
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

fly88.town:443
fly88.town:8443
fly88.town:25
fly88.town:80

Mutex

kV05PhEjyceU

Attributes

delay
3
install
true
install_file
fly88.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/0x000e00000001c5ad-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
2732	cmd.exe
1448	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	6b701aa88fcb0eeb6597509cf42e0a15d90198e75e7032cee4cbcec2a4221bfe.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4992	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
4964	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\6b701aa88fcb0eeb6597509cf42e0a15d90198e75e7032cee4cbcec2a4221bfe.exe
"C:\Users\Admin\AppData\Local\Temp\6b701aa88fcb0eeb6597509cf42e0a15d90198e75e7032cee4cbcec2a4221bfe.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:3128
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "fly88" /tr '"C:\Users\Admin\AppData\Roaming\fly88.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  PID:2732
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "fly88" /tr '"C:\Users\Admin\AppData\Roaming\fly88.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4964
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp624A.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  PID:1448
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4992
- - C:\Users\Admin\AppData\Roaming\fly88.exe
    "C:\Users\Admin\AppData\Roaming\fly88.exe"
    3⤵
    PID:3632

C:\Users\Admin\AppData\Roaming\fly88.exe
"C:\Users\Admin\AppData\Roaming\fly88.exe"
1⤵
PID:2472

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

tmp624A.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp624A.tmp.bat
Size 149B
SHA256 1bcb3b9a68a63a77d34fd111ec7188552442d72b1095e31dcff82e90a7f145a1
MD5 a83f559313cd23228db2be48a0ba4640
SHA1 090cb14982d166ecb880dc59c7fa74055091a425
SHA512 ae22005eec1b2ee73268da8968d6948c6c631dd7fbafffb660980041ea678e5fa3dbbdbd76cd6d5c59e539b93e00ff98e06cc7be0f13936d3be5201785b2ecce
TLSH
T1DAC02B4361C6EE0E2805182312FBD58CA1B76C193F44FF50C7054C4E26C0448F0DA381
MD5 SHA1 SHA512 TLSH

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fly88.exe

Path C:\Users\Admin\AppData\Roaming\fly88.exe
Size 45KB
SHA256 6b701aa88fcb0eeb6597509cf42e0a15d90198e75e7032cee4cbcec2a4221bfe
MD5 362bf4809003e400ec3852f2ed0248fc
SHA1 07664d612038c90bccbd8125a0e50e97752d851c
SHA512 426f6855e5b2f99cd8a4ff823d1075f9cd2dee656d5382adae9336e7c1b449b78b01387000fddc810d6350d3266584e79cf2e04fd16a5466aa4c4508a2921cdc
SSDEEP 768:luI1tT/w70kWUquzumo2qzEKjPGaG6PIyzjbFgX3iuBEXS7BDZWx:luI1tT/kW2tKTkDy3bCXSoEXStdWx
TLSH
T194232C003BE9822BF2BE4BB89CF26145467AF6A32603D54D2CC451D75713FC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2472-12-0x0000000074EA0000-0x000000007565C000-memory.dmp

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memory/2472-14-0x0000000074EA0000-0x000000007565C000-memory.dmp

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memory/3128-0-0x0000000074F82000-0x0000000074F83000-memory.dmp

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memory/3128-1-0x00000000007D0000-0x00000000007E2000-memory.dmp

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memory/3128-2-0x0000000074F70000-0x000000007572C000-memory.dmp

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memory/3128-3-0x00000000051E0000-0x000000000527C000-memory.dmp

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memory/3128-8-0x0000000074F70000-0x000000007572C000-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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