asyncrat | efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19

Analysis

max time kernel
148s
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
04/08/2026, 17:23

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General

Target
efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
Size 45KB
Sample260804-vyc2astsfz
SHA256 efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19
MD5 1395b1d2a6a7491b957345fd4531d526
SHA1 656739ae3ca0bfba0b1a5c6d1d91b7f0e049867f
SHA512 d1839518456fb1d17c2675a197b246d97df5526e174b3d2d6b9d4caa61413a404357b36719320d1bae192ac86c15e2f7b80eb97c10fef5d7cfa22ede8d7aa473
SSDEEP 768:0u1YJTHwAUgQWUaT2Wmo2q9ZRzMwnOPIZzjbggX3ig+ENnrO8nFiFJRBDZ8x:0u1YJTHcw2SA+3Z3bHXSbEhO0FaJvd8x
TLSH
T167232A003BE8822BF2BE5F78A8F26145867EF2673603D54A1CC451D75613FC69A426FE
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

viet69i.com:80
viet69i.com:22
viet69i.com:8080
viet69i.com:8880
viet69i.com:2052
viet69i.com:2082
viet69i.com:2086
viet69i.com:2095
viet69i.com:443
viet69i.com:2053
viet69i.com:2083
viet69i.com:2087
viet69i.com:2096
viet69i.com:8443
www.viet69i.com:80
www.viet69i.com:22
www.viet69i.com:8080
www.viet69i.com:8880
www.viet69i.com:2052
www.viet69i.com:2082
www.viet69i.com:2086
www.viet69i.com:2095
www.viet69i.com:443
www.viet69i.com:2053
www.viet69i.com:2083
www.viet69i.com:2087
www.viet69i.com:2096
www.viet69i.com:8443
blaster.viet69i.com:80
blaster.viet69i.com:22
blaster.viet69i.com:8080
blaster.viet69i.com:8880
blaster.viet69i.com:2052
blaster.viet69i.com:2082
blaster.viet69i.com:2086
blaster.viet69i.com:2095
blaster.viet69i.com:443
blaster.viet69i.com:2053
blaster.viet69i.com:2083
blaster.viet69i.com:2087
blaster.viet69i.com:2096
blaster.viet69i.com:8443
stuxnet.viet69i.com:80
stuxnet.viet69i.com:22
stuxnet.viet69i.com:8080
stuxnet.viet69i.com:8880
stuxnet.viet69i.com:2052
stuxnet.viet69i.com:2082
stuxnet.viet69i.com:2086
stuxnet.viet69i.com:2095
stuxnet.viet69i.com:443
stuxnet.viet69i.com:2053
stuxnet.viet69i.com:2083
stuxnet.viet69i.com:2087
stuxnet.viet69i.com:2096
stuxnet.viet69i.com:8443
malware.viet69i.com:80
malware.viet69i.com:22
malware.viet69i.com:8080
malware.viet69i.com:8880
malware.viet69i.com:2052
malware.viet69i.com:2082
malware.viet69i.com:2086
malware.viet69i.com:2095
malware.viet69i.com:443
malware.viet69i.com:2053
malware.viet69i.com:2083
malware.viet69i.com:2087
malware.viet69i.com:2096
malware.viet69i.com:8443

Mutex

eNXILmfI0Ylj

Attributes

delay
0
install
true
install_file
ef203g.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/0x0003000000000432-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1416	ef203g.exe
1792	ef203g.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
5752	cmd.exe
5236	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	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.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	ef203g.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ef203g.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5748	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
1500	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
Token: SeDebugPrivilege	1416	ef203g.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2552 wrote to memory of 5752	2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe	89
PID 2552 wrote to memory of 5236	2552	efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe	90
PID 5236 wrote to memory of 5748	5236	cmd.exe	93
PID 5752 wrote to memory of 1500	5752	cmd.exe	94
PID 5236 wrote to memory of 1792	5236	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe
"C:\Users\Admin\AppData\Local\Temp\efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2552
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ef203g" /tr '"C:\Users\Admin\AppData\Roaming\ef203g.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5752
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "ef203g" /tr '"C:\Users\Admin\AppData\Roaming\ef203g.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1500
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpE1D0.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5236
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5748
- - C:\Users\Admin\AppData\Roaming\ef203g.exe
    "C:\Users\Admin\AppData\Roaming\ef203g.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1792

C:\Users\Admin\AppData\Roaming\ef203g.exe
"C:\Users\Admin\AppData\Roaming\ef203g.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1416

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

Replay Monitor

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Downloads

tmpE1D0.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpE1D0.tmp.bat
Size 150B
SHA256 fcc044d337ef4612cfe359cd7b72c634a051f983126a51b6788dbbe1435dfd0b
MD5 5c9bbc304190247799456fd9c042b697
SHA1 0a97621b61953748b1728f2a3da5c70a8f5443f6
SHA512 c16fa8058440bd3514410d4f8d3e3dfdcf9b3582a3752e3859b2001bd430d154ad4f246cbd7944c30a231c3873e1823924a8c314c9a1e83d402d51d6eabff28e
TLSH
T1C3C02B5251C6EA4E3906146312FAD5CC91727C1E3F48FB00CB44400E16C085CF4EA382
MD5 SHA1 SHA512 TLSH

Submit Download

ef203g.exe

Path C:\Users\Admin\AppData\Roaming\ef203g.exe
Size 45KB
SHA256 efe70d3845a4464f2918e3c8c01a290ca35efae4b17f76ec830563c7c6ac9b19
MD5 1395b1d2a6a7491b957345fd4531d526
SHA1 656739ae3ca0bfba0b1a5c6d1d91b7f0e049867f
SHA512 d1839518456fb1d17c2675a197b246d97df5526e174b3d2d6b9d4caa61413a404357b36719320d1bae192ac86c15e2f7b80eb97c10fef5d7cfa22ede8d7aa473
SSDEEP 768:0u1YJTHwAUgQWUaT2Wmo2q9ZRzMwnOPIZzjbggX3ig+ENnrO8nFiFJRBDZ8x:0u1YJTHcw2SA+3Z3bHXSbEhO0FaJvd8x
TLSH
T167232A003BE8822BF2BE5F78A8F26145867EF2673603D54A1CC451D75613FC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1416-12-0x0000000075160000-0x000000007591C000-memory.dmp

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memory/1416-14-0x0000000075160000-0x000000007591C000-memory.dmp

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memory/2552-0-0x0000000075172000-0x0000000075173000-memory.dmp

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memory/2552-1-0x0000000000660000-0x0000000000672000-memory.dmp

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memory/2552-2-0x0000000075160000-0x000000007591C000-memory.dmp

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memory/2552-3-0x0000000005240000-0x00000000052DC000-memory.dmp

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memory/2552-8-0x0000000075160000-0x000000007591C000-memory.dmp

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