asyncrat | 603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a

Analysis

max time kernel
6s
max time network
152s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
18/07/2026, 11:15

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General

Target
603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
Size 45KB
Sample260718-ncwsyscy3w
SHA256 603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a
MD5 bb2235200a891aa1ddb38effcdabf4c3
SHA1 851ce194f93bd67fa092e3d0efb91007817d955e
SHA512 5e6fc819fdbc4d7dc2ef2e7da6ff6c3bc6aba715e9c3da14fedab5167985135e343f81ff8de2119cea9f6d2ee08e1878e87bb5e5cf1ad6b832368474f4e11a5d
SSDEEP 768:cuR0JTPUYkEWUmjWymo2q1b0y3NPAIeiZPI2zjb2g8o3ibJZWRwnmma/BDZUx:cuR0JTPjY223V8iW23bpxS6C5GdUx
TLSH
T19C231B003BE8812BF1BE4F78A8F26145867AF6632A03D54D1CC451D75623FC69A53AFE
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

zephimsexhay.com:80
zephimsexhay.com:22
zephimsexhay.com:8080
zephimsexhay.com:8880
zephimsexhay.com:2052
zephimsexhay.com:2082
zephimsexhay.com:2086
zephimsexhay.com:2095
zephimsexhay.com:443
zephimsexhay.com:2053
zephimsexhay.com:2083
zephimsexhay.com:2087
zephimsexhay.com:2096
zephimsexhay.com:8443
www.zephimsexhay.com:80
www.zephimsexhay.com:22
www.zephimsexhay.com:8080
www.zephimsexhay.com:8880
www.zephimsexhay.com:2052
www.zephimsexhay.com:2082
www.zephimsexhay.com:2086
www.zephimsexhay.com:2095
www.zephimsexhay.com:443
www.zephimsexhay.com:2053
www.zephimsexhay.com:2083
www.zephimsexhay.com:2087
www.zephimsexhay.com:2096
www.zephimsexhay.com:8443
hacker.zephimsexhay.com:80
hacker.zephimsexhay.com:22
hacker.zephimsexhay.com:8080
hacker.zephimsexhay.com:8880
hacker.zephimsexhay.com:2052
hacker.zephimsexhay.com:2082
hacker.zephimsexhay.com:2086
hacker.zephimsexhay.com:2095
hacker.zephimsexhay.com:443
hacker.zephimsexhay.com:2053
hacker.zephimsexhay.com:2083
hacker.zephimsexhay.com:2087
hacker.zephimsexhay.com:2096
hacker.zephimsexhay.com:8443
conti.zephimsexhay.com:80
conti.zephimsexhay.com:22
conti.zephimsexhay.com:8080
conti.zephimsexhay.com:8880
conti.zephimsexhay.com:2052
conti.zephimsexhay.com:2082
conti.zephimsexhay.com:2086
conti.zephimsexhay.com:2095
conti.zephimsexhay.com:443
conti.zephimsexhay.com:2053
conti.zephimsexhay.com:2083
conti.zephimsexhay.com:2087
conti.zephimsexhay.com:2096
conti.zephimsexhay.com:8443

Mutex

ZNB3z9uW5ZRz

Attributes

delay
0
install
true
install_file
53fl.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/0x000e00000001c550-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
5504	53fl.exe
4980	53fl.exe

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

System Information Discovery
T1082

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
4008	cmd.exe
1804	cmd.exe

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	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.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	53fl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	53fl.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4768	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
4200	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
Token: SeDebugPrivilege	5504	53fl.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4584 wrote to memory of 4008	4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe	88
PID 4584 wrote to memory of 1804	4584	603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe	89
PID 1804 wrote to memory of 4768	1804	cmd.exe	92
PID 4008 wrote to memory of 4200	4008	cmd.exe	93
PID 1804 wrote to memory of 4980	1804	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe
"C:\Users\Admin\AppData\Local\Temp\603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4584
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "53fl" /tr '"C:\Users\Admin\AppData\Roaming\53fl.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4008
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "53fl" /tr '"C:\Users\Admin\AppData\Roaming\53fl.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4200
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpE9F9.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1804
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4768
- - C:\Users\Admin\AppData\Roaming\53fl.exe
    "C:\Users\Admin\AppData\Roaming\53fl.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4980

C:\Users\Admin\AppData\Roaming\53fl.exe
"C:\Users\Admin\AppData\Roaming\53fl.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:5504

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 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

tmpE9F9.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpE9F9.tmp.bat
Size 148B
SHA256 34733d6e06eba470bbc96caf4e5742d942e66f10156554f1749dd2720a6b1827
MD5 f7c313d8b89feb20168655b0f39fafdc
SHA1 0603d8ce5be6cb9571ea4559bf5f03f9b97a267b
SHA512 93e26385dfe08dae8c65f8ac12c106ae9c9983386526b74aef2fae89ae7cc6d480b9f769336b7241a0b870403dfbfe436d84454f477d37821551ac9ad838909b
TLSH
T10FC02B4261CBEA0F3A0E146312FAE8CC91B27C593F44BB04C704410D52C0848F0EA342
MD5 SHA1 SHA512 TLSH

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53fl.exe

Path C:\Users\Admin\AppData\Roaming\53fl.exe
Size 45KB
SHA256 603c0c38175be49501285ee954d06f66a0038596c92dd98d6981e237d91c9f5a
MD5 bb2235200a891aa1ddb38effcdabf4c3
SHA1 851ce194f93bd67fa092e3d0efb91007817d955e
SHA512 5e6fc819fdbc4d7dc2ef2e7da6ff6c3bc6aba715e9c3da14fedab5167985135e343f81ff8de2119cea9f6d2ee08e1878e87bb5e5cf1ad6b832368474f4e11a5d
SSDEEP 768:cuR0JTPUYkEWUmjWymo2q1b0y3NPAIeiZPI2zjb2g8o3ibJZWRwnmma/BDZUx:cuR0JTPjY223V8iW23bpxS6C5GdUx
TLSH
T19C231B003BE8812BF1BE4F78A8F26145867AF6632A03D54D1CC451D75623FC69A53AFE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/4584-0-0x0000000074E22000-0x0000000074E23000-memory.dmp

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memory/4584-1-0x00000000008B0000-0x00000000008C2000-memory.dmp

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memory/4584-2-0x0000000074E10000-0x00000000755CC000-memory.dmp

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memory/4584-3-0x0000000005270000-0x000000000530C000-memory.dmp

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memory/4584-8-0x0000000074E10000-0x00000000755CC000-memory.dmp

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memory/5504-12-0x0000000074CA0000-0x000000007545C000-memory.dmp

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memory/5504-14-0x0000000074CA0000-0x000000007545C000-memory.dmp

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