asyncrat | 0ceb6182c9f4d91cf6530acf3ea629f72c54fa343dde21678e4eb3a2095eded0

Analysis

max time kernel
24s
max time network
23s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
10-08-2024 13:55

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General

Target

Built.exe
Size

155KB
MD5

b4961df63a672c111c5a6a3beab28883
SHA1

d2656bc353d8dc08da0108de3aec47a36cc8be66
SHA256

0ceb6182c9f4d91cf6530acf3ea629f72c54fa343dde21678e4eb3a2095eded0
SHA512

624d94fa15cc2892450d75147a2c340701e0b62f56010b7a6a52ee4208c7120630bee055d5863ca932eb99c699305b6b67496555953771b86a11823ca4e75d4a
SSDEEP

3072:bCLQ8Z+EYUbq1O8lGzBZ+EYUbq1O8lGzG6bCVTh:bCLHLbjfLbjK6bk

Score

10^/10

asyncrat discovery rat

Malware Config

Signatures

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
behavioral1/files/0x000800000002360e-6.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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	Built.exe

Executes dropped EXE 1 IoCs

pid	Process
3352	svchost.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 2 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	Built.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1200	Built.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1200 wrote to memory of 3352	1200	Built.exe	93
PID 1200 wrote to memory of 3352	1200	Built.exe	93
PID 1200 wrote to memory of 3352	1200	Built.exe	93

C:\Users\Admin\AppData\Local\Temp\Built.exe
"C:\Users\Admin\AppData\Local\Temp\Built.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1200
- C:\ProgramData\svchost.exe
  "C:\ProgramData\svchost.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:3352

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4384,i,2904906934812054273,11716976550456127484,262144 --variations-seed-version --mojo-platform-channel-handle=3820 /prefetch:8
1⤵
PID:5604

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:\ProgramData\svchost.exe

Filesize
155KB

MD5
b4961df63a672c111c5a6a3beab28883

SHA1
d2656bc353d8dc08da0108de3aec47a36cc8be66

SHA256
0ceb6182c9f4d91cf6530acf3ea629f72c54fa343dde21678e4eb3a2095eded0

SHA512
624d94fa15cc2892450d75147a2c340701e0b62f56010b7a6a52ee4208c7120630bee055d5863ca932eb99c699305b6b67496555953771b86a11823ca4e75d4a

Download Submit
memory/1200-0-0x000000007524E000-0x000000007524F000-memory.dmp

Filesize
4KB

Download
memory/1200-1-0x0000000000100000-0x000000000012C000-memory.dmp

Filesize
176KB

Download
memory/3352-17-0x0000000075240000-0x00000000759F0000-memory.dmp

Filesize
7.7MB

Download
memory/3352-18-0x0000000075240000-0x00000000759F0000-memory.dmp

Filesize
7.7MB

Download