asyncrat | 49a4c489dfa7a53be07d44857f65fd7a398d7a631a51532f1a9f3b5340979fe8

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
03/08/2023, 11:05

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General

Target
2.exe
Size 45KB
Sample230803-m6ssqaeb6z
SHA256 49a4c489dfa7a53be07d44857f65fd7a398d7a631a51532f1a9f3b5340979fe8
MD5 dea3149aae31bd4116adba54840af10f
SHA1 71f22e3720be46ea1d89ca7d47be95fc64a1a741
SHA512 a6cdf451453676080f956330e217a4dd64ba0875ab6d951deaa83b9e38dd32fa87fa1e761dafd61cf55c659a5e333ff55f9726d6a5684f8d18c6843d4297a445
SSDEEP 768:PuO01TXQpMlWUlr7e+fmo2qD7R5+oD6/1ZPIUYgzjb2gX3iHrg3UCBDZrx:PuO01TXOw2k1G/1W9g3bpXS6rdrx
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

pruevapoiu-20286.portmap.io:20286

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
2.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 3 IoCs

rat

resource	yara_rule
behavioral2/memory/3220-133-0x0000000000B20000-0x0000000000B32000-memory.dmp	asyncrat
behavioral2/files/0x000400000001e6d9-144.dat	asyncrat
behavioral2/files/0x000400000001e6d9-145.dat	asyncrat

Executes dropped EXE 1 IoCs

pid	Process
316	2.exe

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
2224	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
552	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe
3220	2.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3220	2.exe
Token: SeDebugPrivilege	316	2.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3220 wrote to memory of 4336	3220	2.exe	90
PID 3220 wrote to memory of 4336	3220	2.exe	90
PID 3220 wrote to memory of 4336	3220	2.exe	90
PID 3220 wrote to memory of 816	3220	2.exe	92
PID 3220 wrote to memory of 816	3220	2.exe	92
PID 3220 wrote to memory of 816	3220	2.exe	92
PID 4336 wrote to memory of 2224	4336	cmd.exe	94
PID 4336 wrote to memory of 2224	4336	cmd.exe	94
PID 4336 wrote to memory of 2224	4336	cmd.exe	94
PID 816 wrote to memory of 552	816	cmd.exe	95
PID 816 wrote to memory of 552	816	cmd.exe	95
PID 816 wrote to memory of 552	816	cmd.exe	95
PID 816 wrote to memory of 316	816	cmd.exe	97
PID 816 wrote to memory of 316	816	cmd.exe	97
PID 816 wrote to memory of 316	816	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\2.exe
"C:\Users\Admin\AppData\Local\Temp\2.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3220
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "2" /tr '"C:\Users\Admin\AppData\Roaming\2.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4336
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "2" /tr '"C:\Users\Admin\AppData\Roaming\2.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:2224
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp97BC.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:816
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:552
- - C:\Users\Admin\AppData\Roaming\2.exe
    "C:\Users\Admin\AppData\Roaming\2.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:316

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

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

2.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\2.exe.log
Size 522B
SHA256 2412679218bb0a7d05ceee32869bbb223619bde9966c4c460a68304a3367724b
MD5 acc9090417037dfa2a55b46ed86e32b8
SHA1 53fa6fb25fb3e88c24d2027aca6ae492b2800a4d
SHA512 d51f7085ec147c708f446b9fb6923cd2fb64596d354ed929e125b30ace57c8cb3217589447a36960e5d3aea87a4e48aaa82c7509eced6d6c2cecd71fcfe3697b
MD5 SHA1 SHA512

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tmp97BC.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp97BC.tmp.bat
Size 145B
SHA256 0bb741d6dc1dd5f43132ea788c2663f97c5a3395618e07a7e8518d254aba0ff4
MD5 620b0f846b8cf866b89ddcb6d26ce0d4
SHA1 2b40404f87e811266f69f5fc6a1bb06b173bd552
SHA512 cf8894a852b9e04049597ab538e3d5c6bb2b263e4b1bdd7bfc35d8b289c02ae886188ddc17330ada0630951a92e36904937191eef8ea6296d3df44e0ed95bc5c
MD5 SHA1 SHA512

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2.exe

Path C:\Users\Admin\AppData\Roaming\2.exe
Size 45KB
SHA256 49a4c489dfa7a53be07d44857f65fd7a398d7a631a51532f1a9f3b5340979fe8
MD5 dea3149aae31bd4116adba54840af10f
SHA1 71f22e3720be46ea1d89ca7d47be95fc64a1a741
SHA512 a6cdf451453676080f956330e217a4dd64ba0875ab6d951deaa83b9e38dd32fa87fa1e761dafd61cf55c659a5e333ff55f9726d6a5684f8d18c6843d4297a445
SSDEEP 768:PuO01TXQpMlWUlr7e+fmo2qD7R5+oD6/1ZPIUYgzjb2gX3iHrg3UCBDZrx:PuO01TXOw2k1G/1W9g3bpXS6rdrx
MD5 SHA1 SHA512 SSDEEP

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2.exe

Path C:\Users\Admin\AppData\Roaming\2.exe
Size 45KB
SHA256 49a4c489dfa7a53be07d44857f65fd7a398d7a631a51532f1a9f3b5340979fe8
MD5 dea3149aae31bd4116adba54840af10f
SHA1 71f22e3720be46ea1d89ca7d47be95fc64a1a741
SHA512 a6cdf451453676080f956330e217a4dd64ba0875ab6d951deaa83b9e38dd32fa87fa1e761dafd61cf55c659a5e333ff55f9726d6a5684f8d18c6843d4297a445
SSDEEP 768:PuO01TXQpMlWUlr7e+fmo2qD7R5+oD6/1ZPIUYgzjb2gX3iHrg3UCBDZrx:PuO01TXOw2k1G/1W9g3bpXS6rdrx
MD5 SHA1 SHA512 SSDEEP

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memory/316-147-0x00000000743D0000-0x0000000074B80000-memory.dmp

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memory/316-148-0x0000000004A50000-0x0000000004A60000-memory.dmp

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memory/316-149-0x00000000743D0000-0x0000000074B80000-memory.dmp

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memory/316-150-0x0000000004A50000-0x0000000004A60000-memory.dmp

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memory/3220-141-0x0000000074480000-0x0000000074C30000-memory.dmp

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memory/3220-136-0x0000000005660000-0x00000000056FC000-memory.dmp

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memory/3220-135-0x00000000054B0000-0x00000000054C0000-memory.dmp

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memory/3220-134-0x0000000074480000-0x0000000074C30000-memory.dmp

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memory/3220-133-0x0000000000B20000-0x0000000000B32000-memory.dmp

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