asyncrat | 447eae52ab1979405497866c72df7ec0703085ad6946ab0127f612b1518f8759

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
08/05/2024, 12:02

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General

Target
start.exe
Size 63KB
Sample240508-n7pm5abe4x
SHA256 447eae52ab1979405497866c72df7ec0703085ad6946ab0127f612b1518f8759
MD5 c1ade258f05c512e98ebc4d9d1165f8a
SHA1 acf20f6a7dc7841ae06f801b887289fdc99e0488
SHA512 5b652e0ef6293d7baeb7e9d8b79322ec65e98d748e1df492099fa6692d0bbc78f032df68e7028a28af06b5c27394456159351a6469fdaf777e6eb98609331076
SSDEEP 1536:SaKFoNbEkySYKumUYFOy5biAPY0JG4aRjnl7RUr+TG5x:SawoNbEkAKumUYFD5biF0JejxSsCx
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat exodus_market rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Version

| Edit 3LOSH RAT

Botnet

Exodus_Market

leetboy.dynuddns.net:1339

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
svchos.exe
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 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x00040000000229c8-11.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-1-5-21-3411335054-1982420046-2118495756-1000\Control Panel\International\Geo\Nation	start.exe

Executes dropped EXE 1 IoCs

pid	Process
2832	svchos.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
4172	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4532	timeout.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
3076	start.exe
3076	start.exe
3076	start.exe
3076	start.exe
3076	start.exe
3076	start.exe
3076	start.exe
3076	start.exe
3076	start.exe
3076	start.exe
3076	start.exe
3076	start.exe
3076	start.exe
3076	start.exe
3076	start.exe
3076	start.exe
3076	start.exe
3076	start.exe
3076	start.exe
3076	start.exe
3076	start.exe
2832	svchos.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3076	start.exe
Token: SeDebugPrivilege	2832	svchos.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2832	svchos.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3076 wrote to memory of 4052	3076	start.exe	91
PID 3076 wrote to memory of 4052	3076	start.exe	91
PID 3076 wrote to memory of 4052	3076	start.exe	91
PID 3076 wrote to memory of 1748	3076	start.exe	93
PID 3076 wrote to memory of 1748	3076	start.exe	93
PID 3076 wrote to memory of 1748	3076	start.exe	93
PID 4052 wrote to memory of 4172	4052	cmd.exe	95
PID 4052 wrote to memory of 4172	4052	cmd.exe	95
PID 4052 wrote to memory of 4172	4052	cmd.exe	95
PID 1748 wrote to memory of 4532	1748	cmd.exe	96
PID 1748 wrote to memory of 4532	1748	cmd.exe	96
PID 1748 wrote to memory of 4532	1748	cmd.exe	96
PID 1748 wrote to memory of 2832	1748	cmd.exe	97
PID 1748 wrote to memory of 2832	1748	cmd.exe	97
PID 1748 wrote to memory of 2832	1748	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\start.exe
"C:\Users\Admin\AppData\Local\Temp\start.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3076
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchos" /tr '"C:\Users\Admin\AppData\Roaming\svchos.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4052
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchos" /tr '"C:\Users\Admin\AppData\Roaming\svchos.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:4172
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp50DF.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1748
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4532
- - C:\Users\Admin\AppData\Roaming\svchos.exe
    "C:\Users\Admin\AppData\Roaming\svchos.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2832

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

tmp50DF.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp50DF.tmp.bat
Size 150B
SHA256 43d34351a57a0bc564685a405589c7e4a072b1abf74aa123c43a5fc20d146773
MD5 aa032f285bcf2ffed065c1fb80041e32
SHA1 dc7b2573d16eff67b87bb0f9231c990c788abac6
SHA512 a39ce8b64633191b6a744807fbf2998651fb07c20b41cf466fa32ab979cb1f204372ee44e4fe9de847e536dfcc7a33034977a5a63c903c3ce5c098f21676610a
MD5 SHA1 SHA512

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svchos.exe

Path C:\Users\Admin\AppData\Roaming\svchos.exe
Size 63KB
SHA256 447eae52ab1979405497866c72df7ec0703085ad6946ab0127f612b1518f8759
MD5 c1ade258f05c512e98ebc4d9d1165f8a
SHA1 acf20f6a7dc7841ae06f801b887289fdc99e0488
SHA512 5b652e0ef6293d7baeb7e9d8b79322ec65e98d748e1df492099fa6692d0bbc78f032df68e7028a28af06b5c27394456159351a6469fdaf777e6eb98609331076
SSDEEP 1536:SaKFoNbEkySYKumUYFOy5biAPY0JG4aRjnl7RUr+TG5x:SawoNbEkAKumUYFD5biF0JejxSsCx
MD5 SHA1 SHA512 SSDEEP

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memory/2832-15-0x0000000005410000-0x00000000059B4000-memory.dmp

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memory/2832-13-0x0000000074EE0000-0x0000000075690000-memory.dmp

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memory/2832-14-0x0000000074EE0000-0x0000000075690000-memory.dmp

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memory/2832-16-0x0000000005000000-0x0000000005092000-memory.dmp

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memory/2832-17-0x0000000004FB0000-0x0000000004FBA000-memory.dmp

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memory/2832-20-0x0000000006110000-0x0000000006176000-memory.dmp

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memory/2832-21-0x0000000074EE0000-0x0000000075690000-memory.dmp

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memory/2832-22-0x0000000074EE0000-0x0000000075690000-memory.dmp

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memory/3076-3-0x00000000059C0000-0x0000000005A5C000-memory.dmp

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memory/3076-8-0x0000000074F70000-0x0000000075720000-memory.dmp

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memory/3076-2-0x0000000074F70000-0x0000000075720000-memory.dmp

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memory/3076-1-0x0000000000FA0000-0x0000000000FB6000-memory.dmp

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memory/3076-0-0x0000000074F7E000-0x0000000074F7F000-memory.dmp

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