asyncrat | ddf531ca3e77535cc8218015b2b2eaf0f7f2cb7f8cad09d3cbaea3278481d538

Analysis

max time kernel
94s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19-11-2024 08:35

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General

Target

tmp_0tdvx_8.exe
Size

258KB
MD5

1e69645ce8569c4eb86bff0904ec709a
SHA1

872dbb62d85b8ff7ecc0543b2038410c7006daa4
SHA256

ddf531ca3e77535cc8218015b2b2eaf0f7f2cb7f8cad09d3cbaea3278481d538
SHA512

a893de4baf4bc86d2677a41598e5b45b2d4b6d092de4bd66c0283344bb2b8176f3c8aae757af8427fd8e6d03370bd127d8a32790e505b932560b2bc07812aa8a
SSDEEP

1536:ZtCvd/g9bzMf2IxlBXOA7W2+IFqHCRTGA:kd/g9bzMeIxlBeA7W2+IFqHCRT

Score

10^/10

asyncrat 27-07-2024 discovery rat

Malware Config

Extracted

Family

asyncrat

Version

AWS | 3Losh

Botnet

27-07-2024

127.0.0.1:6000

104.243.32.185:6000

Mutex

AsyncMutex_alosh

Attributes

delay
3
install
false
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

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-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	tmp_0tdvx_8.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fontdrvhost.lnk	fontdrvhost.exe

Executes dropped EXE 1 IoCs

pid	Process
4304	fontdrvhost.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4304 set thread context of 832	4304	fontdrvhost.exe	101

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 1 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	aspnet_compiler.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4304	fontdrvhost.exe
Token: SeDebugPrivilege	832	aspnet_compiler.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3692 wrote to memory of 4304	3692	tmp_0tdvx_8.exe	94
PID 3692 wrote to memory of 4304	3692	tmp_0tdvx_8.exe	94
PID 4304 wrote to memory of 832	4304	fontdrvhost.exe	101
PID 4304 wrote to memory of 832	4304	fontdrvhost.exe	101
PID 4304 wrote to memory of 832	4304	fontdrvhost.exe	101
PID 4304 wrote to memory of 832	4304	fontdrvhost.exe	101
PID 4304 wrote to memory of 832	4304	fontdrvhost.exe	101
PID 4304 wrote to memory of 832	4304	fontdrvhost.exe	101
PID 4304 wrote to memory of 832	4304	fontdrvhost.exe	101
PID 4304 wrote to memory of 832	4304	fontdrvhost.exe	101

C:\Users\Admin\AppData\Local\Temp\tmp_0tdvx_8.exe
"C:\Users\Admin\AppData\Local\Temp\tmp_0tdvx_8.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3692
- C:\Users\Admin\AppData\Local\Microsoft\fontdrvhost.exe
  "C:\Users\Admin\AppData\Local\Microsoft\fontdrvhost.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4304
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:832

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\fontdrvhost.exe

Filesize
258KB

MD5
1e69645ce8569c4eb86bff0904ec709a

SHA1
872dbb62d85b8ff7ecc0543b2038410c7006daa4

SHA256
ddf531ca3e77535cc8218015b2b2eaf0f7f2cb7f8cad09d3cbaea3278481d538

SHA512
a893de4baf4bc86d2677a41598e5b45b2d4b6d092de4bd66c0283344bb2b8176f3c8aae757af8427fd8e6d03370bd127d8a32790e505b932560b2bc07812aa8a

Download Submit
memory/832-16-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/832-21-0x0000000005CB0000-0x0000000005D4C000-memory.dmp

Filesize
624KB

Download
memory/832-22-0x0000000006640000-0x0000000006BE4000-memory.dmp

Filesize
5.6MB

Download
memory/832-23-0x0000000006100000-0x0000000006166000-memory.dmp

Filesize
408KB

Download
memory/3692-0-0x00007FFA38393000-0x00007FFA38395000-memory.dmp

Filesize
8KB

Download
memory/3692-1-0x0000015DB9340000-0x0000015DB9386000-memory.dmp

Filesize
280KB

Download
memory/4304-11-0x00007FFA383C3000-0x00007FFA383C5000-memory.dmp

Filesize
8KB

Download
memory/4304-12-0x00000178756D0000-0x0000017875746000-memory.dmp

Filesize
472KB

Download
memory/4304-13-0x0000017875670000-0x000001787568E000-memory.dmp

Filesize
120KB

Download
memory/4304-15-0x00007FFA383C0000-0x00007FFA38E81000-memory.dmp

Filesize
10.8MB

Download
memory/4304-18-0x00007FFA383C0000-0x00007FFA38E81000-memory.dmp

Filesize
10.8MB

Download