asyncrat | bdfc9238f4c1c4d26fdd838bd39f0cff4f7628878320b73b1245cc21321615d7

Analysis

max time kernel
15s
max time network
18s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241211-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
31-12-2024 14:44

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General

Target

build.exe
Size

6.1MB
MD5

e7635fd18fe8720076cbfa1c2291132a
SHA1

36b92c71ba43577bae36cada0123fa27ccfb7df0
SHA256

bdfc9238f4c1c4d26fdd838bd39f0cff4f7628878320b73b1245cc21321615d7
SHA512

f2b613f7db04d3d179ef6ddeb979de64351400b029c11b661da36ee88184277c5c78dea147f4be064e56549a6dd52b7a7b85ea36efc6c249cfcd5453f93bfaad
SSDEEP

196608:7SkSIlLTUcwti7TQl2NgVg01MWAXAkuujCPX9YG9he5GnQCAJKN:ukSopwtQQl2aOtXADu8X9Y95GQLJ

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

51.89.44.68:8848

Mutex

etb3t1tr5n

Attributes

delay
1
install
true
install_file
svchost.exe
install_folder
%Temp%

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
behavioral1/files/0x002a000000046190-7.dat	family_asyncrat

Downloads MZ/PE file

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-1-5-21-2366345620-3342093254-3461191856-1000\Control Panel\International\Geo\Nation	build.exe

Executes dropped EXE 2 IoCs

pid	Process
4920	svchost.exe
3880	svchost.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
14	raw.githubusercontent.com
15	raw.githubusercontent.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 22 IoCs

description	pid	Process
Token: SeDebugPrivilege	4424	build.exe
Token: SeIncreaseQuotaPrivilege	4920	svchost.exe
Token: SeSecurityPrivilege	4920	svchost.exe
Token: SeTakeOwnershipPrivilege	4920	svchost.exe
Token: SeLoadDriverPrivilege	4920	svchost.exe
Token: SeSystemProfilePrivilege	4920	svchost.exe
Token: SeSystemtimePrivilege	4920	svchost.exe
Token: SeProfSingleProcessPrivilege	4920	svchost.exe
Token: SeIncBasePriorityPrivilege	4920	svchost.exe
Token: SeCreatePagefilePrivilege	4920	svchost.exe
Token: SeBackupPrivilege	4920	svchost.exe
Token: SeRestorePrivilege	4920	svchost.exe
Token: SeShutdownPrivilege	4920	svchost.exe
Token: SeDebugPrivilege	4920	svchost.exe
Token: SeSystemEnvironmentPrivilege	4920	svchost.exe
Token: SeRemoteShutdownPrivilege	4920	svchost.exe
Token: SeUndockPrivilege	4920	svchost.exe
Token: SeManageVolumePrivilege	4920	svchost.exe
Token: 33	4920	svchost.exe
Token: 34	4920	svchost.exe
Token: 35	4920	svchost.exe
Token: 36	4920	svchost.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4424 wrote to memory of 4920	4424	build.exe	85
PID 4424 wrote to memory of 4920	4424	build.exe	85
PID 4424 wrote to memory of 3880	4424	build.exe	95
PID 4424 wrote to memory of 3880	4424	build.exe	95

C:\Users\Admin\AppData\Local\Temp\build.exe
"C:\Users\Admin\AppData\Local\Temp\build.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4424
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:4920
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Executes dropped EXE
  PID:3880

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

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
63KB

MD5
67ca41c73d556cc4cfc67fc5b425bbbd

SHA1
ada7f812cd581c493630eca83bf38c0f8b32b186

SHA256
23d2e491a8c7f2f7f344764e6879d9566c9a3e55a3788038e48b346c068dde5b

SHA512
0dceb6468147cd2497adf31843389a78460ed5abe2c5a13488fc55a2d202ee6ce0271821d3cf12bc1f09a4d6b79a737ea3bccfc2bb87f89b3fff6410fa85ec02

Download Submit
memory/4424-0-0x00007FFF50F43000-0x00007FFF50F45000-memory.dmp

Filesize
8KB

Download
memory/4424-1-0x000002BCD77A0000-0x000002BCD7DB6000-memory.dmp

Filesize
6.1MB

Download
memory/4424-2-0x00007FFF50F40000-0x00007FFF51A02000-memory.dmp

Filesize
10.8MB

Download
memory/4424-20-0x00007FFF50F43000-0x00007FFF50F45000-memory.dmp

Filesize
8KB

Download
memory/4424-21-0x00007FFF50F40000-0x00007FFF51A02000-memory.dmp

Filesize
10.8MB

Download
memory/4920-17-0x0000000000BA0000-0x0000000000BB6000-memory.dmp

Filesize
88KB

Download
memory/4920-18-0x00007FFF50F40000-0x00007FFF51A02000-memory.dmp

Filesize
10.8MB

Download
memory/4920-19-0x00007FFF50F40000-0x00007FFF51A02000-memory.dmp

Filesize
10.8MB

Download