asyncrat | 72b2cd81acb88e14d1f0a3cb660e48a78deaecac9135f762b838cd41fbc8c6fc

Analysis

max time kernel
12s
max time network
149s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
03/10/2026, 12:19

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General

Target
tgteru.exe
Size 47KB
Sample261003-pha9wazth1
SHA256 72b2cd81acb88e14d1f0a3cb660e48a78deaecac9135f762b838cd41fbc8c6fc
MD5 c4911b45ca4bfeee9cb940cc2b8696c3
SHA1 1f53ed19e8941ea62fcac94854dc669f210942c4
SHA512 93cf83cc489ae2190bd2e34646ea3f90f5116285c34928d48eb1d44c4d09a33f5a018545c6defc1d0ec5a4742f998921df575214b99b72f835125151a25615b8
SSDEEP 768:0uYHKTsufqG9vSLjWUvlPRmo2qbgo6+TsH11YWPI2Y0bg5OogVy4VpO9cOnYVBDo:0uYHKTsjMvSX246+U1Q2Tbg59I89Y7dO
TLSH
T184233B0037E8816BF2BE5F78ACF22245857BE6673603D54D2CC452D75623BC29A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

tg88seru.me defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

tg88seru.me

tg88seru.me:443

Mutex

rDZfQpKYKbLA

Attributes

delay
3
install
true
install_file
ChromeUpdate.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/0x000f00000001c49d-11.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
4292	ChromeUpdate.exe
4056	ChromeUpdate.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
3880	cmd.exe
3432	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	ChromeUpdate.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	tgteru.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	tgteru.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	ChromeUpdate.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	ChromeUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ChromeUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tgteru.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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1396	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
5000	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe
1624	tgteru.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1624	tgteru.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1624 wrote to memory of 3432	1624	tgteru.exe	90
PID 1624 wrote to memory of 3880	1624	tgteru.exe	92
PID 3432 wrote to memory of 5000	3432	cmd.exe	94
PID 3880 wrote to memory of 1396	3880	cmd.exe	95
PID 3880 wrote to memory of 4056	3880	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\tgteru.exe
"C:\Users\Admin\AppData\Local\Temp\tgteru.exe"
1⤵
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1624
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ChromeUpdate" /tr '"C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3432
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "ChromeUpdate" /tr '"C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5000
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8747.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3880
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1396
- - C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe
    "C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4056

C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe
"C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe"
1⤵
- Executes dropped EXE
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
PID:4292

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

System Network Configuration Discovery

T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp8747.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp8747.tmp.bat
Size 156B
SHA256 899ce0c12a19daa29510adc16938768f8fa2c789ffd9b4d97e0d0098809fa470
MD5 2a1c6fcefe5973ec02d0ef4b8a711dbc
SHA1 c792f8a67157bb704887d38d855e27ae718eaca3
SHA512 17b7521681c5a512479df35531c635795d3b66115e92464474b76489c68c1a42946bbff909c5a3116d29f9bb8b9e16fedc8e565c49e371eedda709ebcd04caf9
TLSH
T115C02BA262C5EE1E3805A43303FAD5CC95B2AC9A3F8AFF00C704440E6280848F4DD382
MD5 SHA1 SHA512 TLSH

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ChromeUpdate.exe

Path C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe
Size 47KB
SHA256 72b2cd81acb88e14d1f0a3cb660e48a78deaecac9135f762b838cd41fbc8c6fc
MD5 c4911b45ca4bfeee9cb940cc2b8696c3
SHA1 1f53ed19e8941ea62fcac94854dc669f210942c4
SHA512 93cf83cc489ae2190bd2e34646ea3f90f5116285c34928d48eb1d44c4d09a33f5a018545c6defc1d0ec5a4742f998921df575214b99b72f835125151a25615b8
SSDEEP 768:0uYHKTsufqG9vSLjWUvlPRmo2qbgo6+TsH11YWPI2Y0bg5OogVy4VpO9cOnYVBDo:0uYHKTsjMvSX246+U1Q2Tbg59I89Y7dO
TLSH
T184233B0037E8816BF2BE5F78ACF22245857BE6673603D54D2CC452D75623BC29A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1624-0-0x0000000074DA2000-0x0000000074DA3000-memory.dmp

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memory/1624-1-0x0000000000D00000-0x0000000000D12000-memory.dmp

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memory/1624-2-0x0000000074D90000-0x000000007554C000-memory.dmp

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memory/1624-3-0x0000000005950000-0x00000000059B6000-memory.dmp

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memory/1624-4-0x0000000005C60000-0x0000000005CFC000-memory.dmp

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memory/1624-9-0x0000000074D90000-0x000000007554C000-memory.dmp

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memory/4292-13-0x0000000074C20000-0x00000000753DC000-memory.dmp

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memory/4292-15-0x0000000074C20000-0x00000000753DC000-memory.dmp

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