asyncrat | b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b

Analysis

max time kernel
148s
max time network
150s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
10/07/2026, 10:59

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General

Target
b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
Size 45KB
Sample260710-m3ndtsas4k
SHA256 b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b
MD5 5383189bcc17a37b7851c8780bb38e66
SHA1 d5f25ac7cd4a3bedd8bd8bda7953b0fbac078bd2
SHA512 7fb0cb8d340ab847b432d660b36b946976ce9962b15bcd6a69f6c600e7ef84901f5d489abeadc2f371a295f782c1b1c909800b576d8f82b43585b1ea39309803
SSDEEP 768:wuZ8pT1Uu4/cWUeT66mo2q1K8V1QpfEcPIYzjbBgX3iFo02Lm3wQWLBJ5BDZMx:wuZ8pT1tc2x8ViBEhY3buXS+0gm3wQWo
TLSH
T174231A003BE9823BF2BE4F789DF26145867AF2632603D54E1CC451DB5623FC69642AED
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

fimsec.com:80
fimsec.com:22
fimsec.com:8080
fimsec.com:8880
fimsec.com:2052
fimsec.com:2082
fimsec.com:2086
fimsec.com:2095
fimsec.com:443
fimsec.com:2053
fimsec.com:2083
fimsec.com:2087
fimsec.com:2096
fimsec.com:8443
www.fimsec.com:80
www.fimsec.com:22
www.fimsec.com:8080
www.fimsec.com:8880
www.fimsec.com:2052
www.fimsec.com:2082
www.fimsec.com:2086
www.fimsec.com:2095
www.fimsec.com:443
www.fimsec.com:2053
www.fimsec.com:2083
www.fimsec.com:2087
www.fimsec.com:2096
www.fimsec.com:8443
ursnif.fimsec.com:80
ursnif.fimsec.com:22
ursnif.fimsec.com:8080
ursnif.fimsec.com:8880
ursnif.fimsec.com:2052
ursnif.fimsec.com:2082
ursnif.fimsec.com:2086
ursnif.fimsec.com:2095
ursnif.fimsec.com:443
ursnif.fimsec.com:2053
ursnif.fimsec.com:2083
ursnif.fimsec.com:2087
ursnif.fimsec.com:2096
ursnif.fimsec.com:8443
malware.fimsec.com:80
malware.fimsec.com:22
malware.fimsec.com:8080
malware.fimsec.com:8880
malware.fimsec.com:2052
malware.fimsec.com:2082
malware.fimsec.com:2086
malware.fimsec.com:2095
malware.fimsec.com:443
malware.fimsec.com:2053
malware.fimsec.com:2083
malware.fimsec.com:2087
malware.fimsec.com:2096
malware.fimsec.com:8443
gh0st.fimsec.com:80
gh0st.fimsec.com:22
gh0st.fimsec.com:8080
gh0st.fimsec.com:8880
gh0st.fimsec.com:2052
gh0st.fimsec.com:2082
gh0st.fimsec.com:2086
gh0st.fimsec.com:2095
gh0st.fimsec.com:443
gh0st.fimsec.com:2053
gh0st.fimsec.com:2083
gh0st.fimsec.com:2087
gh0st.fimsec.com:2096
gh0st.fimsec.com:8443

Mutex

7sl1hKb0WykC

Attributes

delay
0
install
true
install_file
xzux.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/0x000d00000001c50c-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2628	xzux.exe
1672	xzux.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	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.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	xzux.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xzux.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3388	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
252	schtasks.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
Token: SeDebugPrivilege	2628	xzux.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4760 wrote to memory of 3260	4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe	87
PID 4760 wrote to memory of 2592	4760	b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe	88
PID 3260 wrote to memory of 252	3260	cmd.exe	91
PID 2592 wrote to memory of 3388	2592	cmd.exe	92
PID 2592 wrote to memory of 1672	2592	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe
"C:\Users\Admin\AppData\Local\Temp\b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4760
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "xzux" /tr '"C:\Users\Admin\AppData\Roaming\xzux.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3260
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "xzux" /tr '"C:\Users\Admin\AppData\Roaming\xzux.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:252
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp427E.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2592
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3388
- - C:\Users\Admin\AppData\Roaming\xzux.exe
    "C:\Users\Admin\AppData\Roaming\xzux.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1672

C:\Users\Admin\AppData\Roaming\xzux.exe
"C:\Users\Admin\AppData\Roaming\xzux.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2628

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

tmp427E.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp427E.tmp.bat
Size 148B
SHA256 151fd025d3bdc26f2e442c178a5db7e8fa9c303d9e60cc8b3222e13535bbcf3e
MD5 750333a9ba50db081cd8fa805ad21116
SHA1 ae37a918c9feb298fff10c3e7f0cd82b08de45ae
SHA512 e86539ae96bc6f8e68a87cbc0275d2ff33a5b0945a2579b14d4850b6d90f24eb6e926f08c595d7390b79d41f72eceb52145db83a0c858eecf4f13f7019826e95
TLSH
T156C02B4255C9EE5F2806245303FADCCC92726D193F80BB00C34C408D7280848F0DB341
MD5 SHA1 SHA512 TLSH

Submit Download

xzux.exe

Path C:\Users\Admin\AppData\Roaming\xzux.exe
Size 45KB
SHA256 b9fd10aba240e3d34ab74787084b673c99917204f5b4d3857b2c742a911db59b
MD5 5383189bcc17a37b7851c8780bb38e66
SHA1 d5f25ac7cd4a3bedd8bd8bda7953b0fbac078bd2
SHA512 7fb0cb8d340ab847b432d660b36b946976ce9962b15bcd6a69f6c600e7ef84901f5d489abeadc2f371a295f782c1b1c909800b576d8f82b43585b1ea39309803
SSDEEP 768:wuZ8pT1Uu4/cWUeT66mo2q1K8V1QpfEcPIYzjbBgX3iFo02Lm3wQWLBJ5BDZMx:wuZ8pT1tc2x8ViBEhY3buXS+0gm3wQWo
TLSH
T174231A003BE9823BF2BE4F789DF26145867AF2632603D54E1CC451DB5623FC69642AED
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2628-12-0x0000000074BA0000-0x000000007535C000-memory.dmp

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memory/2628-14-0x0000000074BA0000-0x000000007535C000-memory.dmp

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memory/4760-0-0x0000000074DB2000-0x0000000074DB3000-memory.dmp

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memory/4760-1-0x0000000000630000-0x0000000000642000-memory.dmp

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memory/4760-2-0x0000000074DA0000-0x000000007555C000-memory.dmp

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memory/4760-3-0x0000000005190000-0x000000000522C000-memory.dmp

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memory/4760-8-0x0000000074DA0000-0x000000007555C000-memory.dmp

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