asyncrat | 66d481bf2dca013520492ea209434c3f9fbb44efb9f764752a8258ccaf0708ab

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
26-07-2024 15:16

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Build1.exe
Size

138KB
MD5

fb83432d034c44a1202532e5400d535c
SHA1

6ddff5ca2cb58b2d108811cbb1a78d56c14b9fe8
SHA256

66d481bf2dca013520492ea209434c3f9fbb44efb9f764752a8258ccaf0708ab
SHA512

119486fa615cf484d867da39e588adf883ab38dd617d8f09a85f255f0c54455a5b9c73966187521019180445a0d0840a2a4a646e0048f257a67ab53afc267329
SSDEEP

3072:I7Nx8SxLRNMX/VMCZL0f6AXVll3U/+1h8wpAy7:IjLRQGaojl6/+1hHpA

Score

10^/10

asyncrat 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
behavioral2/files/0x00090000000233f3-6.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-1-5-21-2990742725-2267136959-192470804-1000\Control Panel\International\Geo\Nation	Build1.exe

Executes dropped EXE 1 IoCs

pid	Process
3336	Frendo.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3336	Frendo.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4444 wrote to memory of 3336	4444	Build1.exe	84
PID 4444 wrote to memory of 3336	4444	Build1.exe	84

C:\Users\Admin\AppData\Local\Temp\Build1.exe
"C:\Users\Admin\AppData\Local\Temp\Build1.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4444
- C:\Users\Admin\AppData\Local\Temp\Frendo.exe
  "C:\Users\Admin\AppData\Local\Temp\Frendo.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3336

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

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\Frendo.exe

Filesize
114KB

MD5
4d9bed090024a47510e231dfd690863f

SHA1
a3ed33f387f880edd37964ebfd8d152259c345e6

SHA256
1e84b3659b51b2056812d9c1bb3c169689da3adb50a1dfaec30b85392a791b57

SHA512
aeebb7c5177a41351ecc74a5b5c6fc07c32bc2b9ca11eef540556b231488d8da5a043e17398a263461aead3d29d1d982f048df9eaf2c4f3cde9d9893e81b2f2d

Download Submit
memory/3336-14-0x0000000000B50000-0x0000000000B72000-memory.dmp

Filesize
136KB

Download
memory/3336-15-0x00007FFA81330000-0x00007FFA81DF1000-memory.dmp

Filesize
10.8MB

Download
memory/3336-16-0x00007FFA81330000-0x00007FFA81DF1000-memory.dmp

Filesize
10.8MB

Download
memory/3336-17-0x00007FFA81330000-0x00007FFA81DF1000-memory.dmp

Filesize
10.8MB

Download
memory/3336-20-0x00007FFA81330000-0x00007FFA81DF1000-memory.dmp

Filesize
10.8MB

Download
memory/4444-0-0x00007FFA81333000-0x00007FFA81335000-memory.dmp

Filesize
8KB

Download
memory/4444-1-0x0000000000B40000-0x0000000000B68000-memory.dmp

Filesize
160KB

Download