asyncrat | fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953

Analysis

max time kernel
149s
max time network
146s
platform
windows11-21h2_x64
resource
win11-20250502-en
resource tags

arch:x64arch:x86image:win11-20250502-enlocale:en-usos:windows11-21h2-x64system
submitted
11/05/2026, 19:52

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General

Target
fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
Size 114KB
Sample260511-yle7nshv4y
SHA256 fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953
MD5 d22cc85a1dd758626f1cabeb32bcaae6
SHA1 7e2b1787b294ccebec75c63b963ae91b96c0b402
SHA512 35d36ff281139b899d95853f90da3b5e70af0ffc808fd83d380b725aabc6676ed8ab55586b26fa409ecd8b2005ace23af09d92a02e1778f6d4b865cfe79af3be
SSDEEP 1536:duX61TAuP2G3xCDj6JbASGJ1Zizbd5AvKJYUP:duXmTAuP2qxCDj6JbALWfwgBP
TLSH
T1B5B3A0902AD58316E16D0A7664AE79F045EEFD5E2501CDCF28F4F34A863378FC6036A9
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

vipbookssearch.radio.fm:80
vipbookssearch.radio.fm:443
vipbookssearch.radio.fm:8080
vipbookssearch.radio.fm:7707
vipbookssearch.radio.fm:8443
www.vipbookssearch.radio.fm:80
www.vipbookssearch.radio.fm:443
www.vipbookssearch.radio.fm:8080
www.vipbookssearch.radio.fm:7707
www.vipbookssearch.radio.fm:8443
app.vipbookssearch.radio.fm:80
app.vipbookssearch.radio.fm:443
app.vipbookssearch.radio.fm:8080
app.vipbookssearch.radio.fm:7707
app.vipbookssearch.radio.fm:8443

Mutex

e1B0swiEdkni

Attributes

delay
3
install
true
install_file
ChromeFix.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/0x001a00000002b1a4-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1128	ChromeFix.exe
560	ChromeFix.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	ChromeFix.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ChromeFix.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4536	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
1576	schtasks.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
Token: SeDebugPrivilege	1128	ChromeFix.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5860 wrote to memory of 3180	5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe	78
PID 5860 wrote to memory of 6116	5860	fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe	80
PID 3180 wrote to memory of 1576	3180	cmd.exe	82
PID 6116 wrote to memory of 4536	6116	cmd.exe	83
PID 6116 wrote to memory of 560	6116	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe
"C:\Users\Admin\AppData\Local\Temp\fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5860
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ChromeFix" /tr '"C:\Users\Admin\AppData\Roaming\ChromeFix.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3180
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "ChromeFix" /tr '"C:\Users\Admin\AppData\Roaming\ChromeFix.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1576
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp513D.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:6116
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4536
- - C:\Users\Admin\AppData\Roaming\ChromeFix.exe
    "C:\Users\Admin\AppData\Roaming\ChromeFix.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:560

C:\Users\Admin\AppData\Roaming\ChromeFix.exe
"C:\Users\Admin\AppData\Roaming\ChromeFix.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1128

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

tmp513D.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp513D.tmp.bat
Size 153B
SHA256 898bdc08d7a46fdd9c646485c331a3772dd0f2eedb2da98d280d502b8b7c7597
MD5 ff5bae1997dad07de6613b1ff36ae131
SHA1 3e3e90cfde53793390aa570d5dea976ffa1439cc
SHA512 661675d8370700b44c21620c7ae391afad45c51a71633fe5a621942bd04346efa5c7f3a9328f0109a3725e688ef700cbcfa405ad7ec4ace7bbb7d89bd1dbdd84
TLSH
T155C02B9251C9EF0E3805941703FBE98DA573AD1B3F44BF00C708400F5680658F0DD365
MD5 SHA1 SHA512 TLSH

Submit Download

ChromeFix.exe

Path C:\Users\Admin\AppData\Roaming\ChromeFix.exe
Size 114KB
SHA256 fb4e430b0e41d7bcf86b0c9a058712325faa43213b31d2bbb256f66b536ff953
MD5 d22cc85a1dd758626f1cabeb32bcaae6
SHA1 7e2b1787b294ccebec75c63b963ae91b96c0b402
SHA512 35d36ff281139b899d95853f90da3b5e70af0ffc808fd83d380b725aabc6676ed8ab55586b26fa409ecd8b2005ace23af09d92a02e1778f6d4b865cfe79af3be
SSDEEP 1536:duX61TAuP2G3xCDj6JbASGJ1Zizbd5AvKJYUP:duXmTAuP2qxCDj6JbALWfwgBP
TLSH
T1B5B3A0902AD58316E16D0A7664AE79F045EEFD5E2501CDCF28F4F34A863378FC6036A9
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/560-15-0x0000000005260000-0x00000000052FC000-memory.dmp

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memory/560-17-0x0000000002D20000-0x0000000002D2B000-memory.dmp

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memory/560-16-0x0000000005300000-0x0000000005902000-memory.dmp

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memory/1128-18-0x0000000005380000-0x000000000541C000-memory.dmp

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memory/1128-20-0x0000000002E10000-0x0000000002E1B000-memory.dmp

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memory/1128-19-0x0000000005420000-0x0000000005A22000-memory.dmp

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memory/4536-12-0x0000000001000000-0x00000000010BB000-memory.dmp

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memory/5860-7-0x00000000057F0000-0x000000000588C000-memory.dmp

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memory/5860-8-0x0000000005890000-0x0000000005E92000-memory.dmp

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memory/5860-2-0x0000000005F50000-0x0000000005FEC000-memory.dmp

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memory/5860-1-0x0000000006080000-0x0000000006090000-memory.dmp

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memory/5860-0-0x0000000000E10000-0x0000000000E32000-memory.dmp

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