asyncrat | e91838e3f9c6aa4e1e043fa30ac176081877347166e52aa9b9cb1e7f25acecbf

Analysis

max time kernel
145s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
06/10/2023, 15:36

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General

Target

Stub.exe
Size

66KB
MD5

93f1ab2325d4e6c3a1c2a0a01c6437bc
SHA1

39c82867d77379637771304db1b93b808efee1b7
SHA256

e91838e3f9c6aa4e1e043fa30ac176081877347166e52aa9b9cb1e7f25acecbf
SHA512

1372a793702f90ad445787041b1bfd43f1a155ded2e9f822124e208c574536f13c6160d127a1242493d1665f296c43782a5a093ec43c33f63f500f4e24fd2e3c
SSDEEP

1536:P2wmkPN1ak1gcKu5UYFpY/jCBebb0UZkg7pVop1rPlTGxx:P21kPN1ak1Ku5UYFp6Mebb0Q9gdCx

Score

10^/10

asyncrat default rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Version

| Edit 3LOSH RAT

Botnet

Default

forlatinamerica.bumbleshrimp.com:2404

Mutex

AsyncMutex_Tre

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

Async RAT payload 2 IoCs

rat

resource	yara_rule
behavioral2/memory/416-0-0x0000000000250000-0x0000000000266000-memory.dmp	asyncrat
behavioral2/memory/416-11-0x00000000067C0000-0x00000000067E4000-memory.dmp	asyncrat

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3800	timeout.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	416	Stub.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 416 wrote to memory of 1140	416	Stub.exe	97
PID 416 wrote to memory of 1140	416	Stub.exe	97
PID 416 wrote to memory of 1140	416	Stub.exe	97
PID 1140 wrote to memory of 3800	1140	cmd.exe	99
PID 1140 wrote to memory of 3800	1140	cmd.exe	99
PID 1140 wrote to memory of 3800	1140	cmd.exe	99

C:\Users\Admin\AppData\Local\Temp\Stub.exe
"C:\Users\Admin\AppData\Local\Temp\Stub.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:416
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp65D9.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1140
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3800

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp65D9.tmp.bat

Filesize
156B

MD5
cba9a5cf34d81dafdba794f9ae8ff320

SHA1
84d8827777a21094a050cb120d8d70cc682e62fd

SHA256
49e7c215f18bf8f356142994f79aa166bba9de8d8d569a74da626c58de0a5a40

SHA512
b978e19a050566478797f9ff3b337dac39e0fff491cdfc94b09d0ee3bafc5ddd855039be5b8b29f5f66dcf96159ca1f29ef2c727c40e2cac3e8232399cdfe3de

Download Submit
memory/416-8-0x0000000074A10000-0x00000000751C0000-memory.dmp

Filesize
7.7MB

Download
memory/416-2-0x0000000004BC0000-0x0000000004BD0000-memory.dmp

Filesize
64KB

Download
memory/416-5-0x00000000056E0000-0x000000000577C000-memory.dmp

Filesize
624KB

Download
memory/416-6-0x0000000005D30000-0x00000000062D4000-memory.dmp

Filesize
5.6MB

Download
memory/416-7-0x00000000057F0000-0x0000000005856000-memory.dmp

Filesize
408KB

Download
memory/416-1-0x0000000074A10000-0x00000000751C0000-memory.dmp

Filesize
7.7MB

Download
memory/416-9-0x0000000004BC0000-0x0000000004BD0000-memory.dmp

Filesize
64KB

Download
memory/416-10-0x0000000006840000-0x00000000068B6000-memory.dmp

Filesize
472KB

Download
memory/416-11-0x00000000067C0000-0x00000000067E4000-memory.dmp

Filesize
144KB

Download
memory/416-12-0x00000000068E0000-0x00000000068FE000-memory.dmp

Filesize
120KB

Download
memory/416-19-0x0000000074A10000-0x00000000751C0000-memory.dmp

Filesize
7.7MB

Download
memory/416-0-0x0000000000250000-0x0000000000266000-memory.dmp

Filesize
88KB

Download