asyncrat | ecd6bf05a8894ff3a3f291d445a2ccdc913ab541ad331af2f63c989a85220486

Analysis

max time kernel
148s
max time network
151s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260618-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260618-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
20/06/2026, 09:15

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General

Target
uoasldn.exe
Size 45KB
Sample260620-k75gssft3w
SHA256 ecd6bf05a8894ff3a3f291d445a2ccdc913ab541ad331af2f63c989a85220486
MD5 049f9d7289759a5cb5e74d0d41eb630f
SHA1 2afe908af747c4f5108906f49611c0e9f29ff648
SHA512 099f9458a42e424a721cc0a5f7b8a739b7f725f707d194420e44754a3fb5941b1a0ce4a9e3056451eadfc004069f607663c91be66cef3aa218b0ea0882888648
SSDEEP 768:huyF4NTdMCbRWUJDObmo2qLKiScy3zlOPIxzjbCgZ3iNFUPTSx7Q/wd6QBDZDx:huyF4NTdxe2li963x3blZSNFUrSOwdDx
TLSH
T181232C003BE9813BF2BF4F78A9F26145467AF1672603DA4A1CC451DB5713BC68A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

admin defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Admin

phimsextoptv.com:80
phimsextoptv.com:443
www.phimsextoptv.com:80
www.phimsextoptv.com:443
uclasd.phimsextoptv.com:80
uclasd.phimsextoptv.com:443
hdfogu.phimsextoptv.com:80
hdfogu.phimsextoptv.com:443

Mutex

FLivoD384zHe

Attributes

delay
3
install
true
install_file
uoasldn.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/0x000d00000001c659-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
4448	uoasldn.exe
2136	uoasldn.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 7 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	uoasldn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	uoasldn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	uoasldn.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
7032	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
6756	schtasks.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe
5836	uoasldn.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5836	uoasldn.exe
Token: SeDebugPrivilege	4448	uoasldn.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5836 wrote to memory of 6320	5836	uoasldn.exe	89
PID 5836 wrote to memory of 6604	5836	uoasldn.exe	90
PID 6604 wrote to memory of 7032	6604	cmd.exe	93
PID 6320 wrote to memory of 6756	6320	cmd.exe	94
PID 6604 wrote to memory of 2136	6604	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\uoasldn.exe
"C:\Users\Admin\AppData\Local\Temp\uoasldn.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5836
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "uoasldn" /tr '"C:\Users\Admin\AppData\Roaming\uoasldn.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:6320
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "uoasldn" /tr '"C:\Users\Admin\AppData\Roaming\uoasldn.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:6756
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp870D.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:6604
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:7032
- - C:\Users\Admin\AppData\Roaming\uoasldn.exe
    "C:\Users\Admin\AppData\Roaming\uoasldn.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2136

C:\Users\Admin\AppData\Roaming\uoasldn.exe
"C:\Users\Admin\AppData\Roaming\uoasldn.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4448

Network

MITRE ATT&CK Enterprise v16

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

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp870D.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp870D.tmp.bat
Size 151B
SHA256 61268b358475cf9c58561eb3b8eeb484d779506ab346ac86a83e8c8efbe37ad6
MD5 ccfaa6020acefef0605e7248541ead55
SHA1 b63ee42e176eff52f9b76ee5dacffb5fc906c923
SHA512 ca4e5b58bd598202d89e61d8fabc7b0863d8e272c890e7aee59b7cbd066217452495b5597baadc12e85eadd78019360d1fa6770d07caf322fc84c5bb04b11a31
TLSH
T123C02B5371CAEB0F3806982313FAF58DD1B26C593F40BB20D344505E13C0448F0DA381
MD5 SHA1 SHA512 TLSH

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uoasldn.exe

Path C:\Users\Admin\AppData\Roaming\uoasldn.exe
Size 45KB
SHA256 ecd6bf05a8894ff3a3f291d445a2ccdc913ab541ad331af2f63c989a85220486
MD5 049f9d7289759a5cb5e74d0d41eb630f
SHA1 2afe908af747c4f5108906f49611c0e9f29ff648
SHA512 099f9458a42e424a721cc0a5f7b8a739b7f725f707d194420e44754a3fb5941b1a0ce4a9e3056451eadfc004069f607663c91be66cef3aa218b0ea0882888648
SSDEEP 768:huyF4NTdMCbRWUJDObmo2qLKiScy3zlOPIxzjbCgZ3iNFUPTSx7Q/wd6QBDZDx:huyF4NTdxe2li963x3blZSNFUrSOwdDx
TLSH
T181232C003BE9813BF2BF4F78A9F26145467AF1672603DA4A1CC451DB5713BC68A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4448-12-0x0000000074470000-0x0000000074C2C000-memory.dmp

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memory/4448-14-0x0000000074470000-0x0000000074C2C000-memory.dmp

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memory/5836-0-0x0000000074482000-0x0000000074483000-memory.dmp

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memory/5836-1-0x0000000000B10000-0x0000000000B22000-memory.dmp

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memory/5836-2-0x0000000074470000-0x0000000074C2C000-memory.dmp

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memory/5836-3-0x00000000054F0000-0x000000000558C000-memory.dmp

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memory/5836-9-0x0000000074470000-0x0000000074C2C000-memory.dmp

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