asyncrat | 5e807de88a43edb7b341ed17b4e218f35c3204bf5dc969c131792b0a23e9ddc1

Analysis

max time kernel
146s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
22/03/2025, 06:17

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General

Target

e37b2913aafb08ae275e16364b9916c6.exe
Size

47KB
MD5

e37b2913aafb08ae275e16364b9916c6
SHA1

cc840be551dcca5c271f5263df5d3953860c33ea
SHA256

37a8613cdcd090ed1de2608fc32b10bf2f50f3cbd2915d45f5965709e037e7e0
SHA512

15792ae8103af2671b0cdbacfe98ae92eb869a9e8c1856e042a2cd602414e423d60544f1dad1f4338ba4ea7ca4b33b240c5aa8136dee6a22ea47f195cd6b25a3
SSDEEP

768:12uI1tT/w70kWUquzumo2qzT20Ek+ZT4DPIE0kZw/kTJX0bie81f4GoCCQKHv3c1:12uI1tT/kW210h+ZT4ME0h/eCbie8mGb

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

Mutex

xwtmpZSwsYCz

Attributes

delay
3
install
true
install_file
Image.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral22/files/0x0008000000024093-12.dat	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-805952410-2104024357-1716932545-1000\Control Panel\International\Geo\Nation	e37b2913aafb08ae275e16364b9916c6.exe

Executes dropped EXE 1 IoCs

pid	Process
4296	Image.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 6 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	e37b2913aafb08ae275e16364b9916c6.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	Image.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1508	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
5044	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe
2492	e37b2913aafb08ae275e16364b9916c6.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2492	e37b2913aafb08ae275e16364b9916c6.exe
Token: SeDebugPrivilege	4296	Image.exe
Token: SeDebugPrivilege	4296	Image.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2492 wrote to memory of 4344	2492	e37b2913aafb08ae275e16364b9916c6.exe	91
PID 2492 wrote to memory of 4344	2492	e37b2913aafb08ae275e16364b9916c6.exe	91
PID 2492 wrote to memory of 4344	2492	e37b2913aafb08ae275e16364b9916c6.exe	91
PID 2492 wrote to memory of 2960	2492	e37b2913aafb08ae275e16364b9916c6.exe	93
PID 2492 wrote to memory of 2960	2492	e37b2913aafb08ae275e16364b9916c6.exe	93
PID 2492 wrote to memory of 2960	2492	e37b2913aafb08ae275e16364b9916c6.exe	93
PID 4344 wrote to memory of 5044	4344	cmd.exe	95
PID 4344 wrote to memory of 5044	4344	cmd.exe	95
PID 4344 wrote to memory of 5044	4344	cmd.exe	95
PID 2960 wrote to memory of 1508	2960	cmd.exe	96
PID 2960 wrote to memory of 1508	2960	cmd.exe	96
PID 2960 wrote to memory of 1508	2960	cmd.exe	96
PID 2960 wrote to memory of 4296	2960	cmd.exe	98
PID 2960 wrote to memory of 4296	2960	cmd.exe	98
PID 2960 wrote to memory of 4296	2960	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\e37b2913aafb08ae275e16364b9916c6.exe
"C:\Users\Admin\AppData\Local\Temp\e37b2913aafb08ae275e16364b9916c6.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2492
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Image" /tr '"C:\Users\Admin\AppData\Roaming\Image.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4344
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Image" /tr '"C:\Users\Admin\AppData\Roaming\Image.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5044
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA383.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2960
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1508
- - C:\Users\Admin\AppData\Roaming\Image.exe
    "C:\Users\Admin\AppData\Roaming\Image.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:4296

Network

MITRE ATT&CK Enterprise v15

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

Query Registry

T1012

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

C:\Users\Admin\AppData\Local\Temp\tmpA383.tmp.bat

Filesize
149B

MD5
891232cc58261de4b4180febe49e0b64

SHA1
c7c9235fa2934a2de6b1095563609778ddc064ae

SHA256
43a7f608cfc071394d4f34b8f47af696ce199ac2c872e05a1e860b0689fb30d5

SHA512
0d17ead86fa69a156c2e6cf32e280ba877f8eea5765433fbedb567bb0eda7e212a59ecb5b9fcfbb14616f9db381833505350c453a9daaa286704eb09a4b0f1cd

Download Submit
C:\Users\Admin\AppData\Roaming\Image.exe

Filesize
47KB

MD5
e37b2913aafb08ae275e16364b9916c6

SHA1
cc840be551dcca5c271f5263df5d3953860c33ea

SHA256
37a8613cdcd090ed1de2608fc32b10bf2f50f3cbd2915d45f5965709e037e7e0

SHA512
15792ae8103af2671b0cdbacfe98ae92eb869a9e8c1856e042a2cd602414e423d60544f1dad1f4338ba4ea7ca4b33b240c5aa8136dee6a22ea47f195cd6b25a3

Download Submit
memory/2492-0-0x0000000074F7E000-0x0000000074F7F000-memory.dmp

Filesize
4KB

Download
memory/2492-1-0x0000000000770000-0x0000000000782000-memory.dmp

Filesize
72KB

Download
memory/2492-2-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download
memory/2492-3-0x0000000005110000-0x0000000005176000-memory.dmp

Filesize
408KB

Download
memory/2492-4-0x00000000055E0000-0x000000000567C000-memory.dmp

Filesize
624KB

Download
memory/2492-10-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download
memory/4296-14-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/4296-15-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download