asyncrat | ec4426e656232d2b1bae80b4c875cf5f95a8aff3291c0577d1a9c2f33417c722

Analysis

max time kernel
127s
max time network
144s
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, 04:50

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General

Target
tmp.exe
Size 47KB
Sample230803-ff8ypabc65
SHA256 ec4426e656232d2b1bae80b4c875cf5f95a8aff3291c0577d1a9c2f33417c722
MD5 e45a8e0c92e70c3fa2d802c3632ca564
SHA1 9fcdc994edac796e14d0231f7448641a6c5ed601
SHA512 f12236bd0697f1da674430a51b0cc47feb2c68cbb0c21266ba62263d28adeb09938e0d9a858963838965fe117a0fb1aa8d89df15d154c4635de09040cc25e443
SSDEEP 768:gtdNILaiWW+ri2I7Vf2ki6U8YbKgem2YVsPqvEgK/J/ZVc6KN:gtV6jovzbdfuSnkJ/ZVclN
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

193.233.233.154:7781

Mutex

DcRatMutex_qwqdanchun

Attributes

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

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/1848-133-0x0000000000750000-0x0000000000762000-memory.dmp	asyncrat
behavioral2/files/0x000800000002320f-143.dat	asyncrat
behavioral2/files/0x000800000002320f-144.dat	asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2660	RuntimeBroke.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
3172	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
520	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe
1848	tmp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1848	tmp.exe
Token: SeDebugPrivilege	2660	RuntimeBroke.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1848 wrote to memory of 4588	1848	tmp.exe	86
PID 1848 wrote to memory of 4588	1848	tmp.exe	86
PID 1848 wrote to memory of 1648	1848	tmp.exe	88
PID 1848 wrote to memory of 1648	1848	tmp.exe	88
PID 4588 wrote to memory of 3172	4588	cmd.exe	90
PID 4588 wrote to memory of 3172	4588	cmd.exe	90
PID 1648 wrote to memory of 520	1648	cmd.exe	91
PID 1648 wrote to memory of 520	1648	cmd.exe	91
PID 1648 wrote to memory of 2660	1648	cmd.exe	92
PID 1648 wrote to memory of 2660	1648	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1848
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "RuntimeBroke" /tr '"C:\Users\Admin\AppData\Local\Temp\RuntimeBroke.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4588
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "RuntimeBroke" /tr '"C:\Users\Admin\AppData\Local\Temp\RuntimeBroke.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:3172
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpD050.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1648
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:520
- - C:\Users\Admin\AppData\Local\Temp\RuntimeBroke.exe
    "C:\Users\Admin\AppData\Local\Temp\RuntimeBroke.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2660

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

RuntimeBroke.exe

Path C:\Users\Admin\AppData\Local\Temp\RuntimeBroke.exe
Size 47KB
SHA256 ec4426e656232d2b1bae80b4c875cf5f95a8aff3291c0577d1a9c2f33417c722
MD5 e45a8e0c92e70c3fa2d802c3632ca564
SHA1 9fcdc994edac796e14d0231f7448641a6c5ed601
SHA512 f12236bd0697f1da674430a51b0cc47feb2c68cbb0c21266ba62263d28adeb09938e0d9a858963838965fe117a0fb1aa8d89df15d154c4635de09040cc25e443
SSDEEP 768:gtdNILaiWW+ri2I7Vf2ki6U8YbKgem2YVsPqvEgK/J/ZVc6KN:gtV6jovzbdfuSnkJ/ZVclN
MD5 SHA1 SHA512 SSDEEP

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RuntimeBroke.exe

Path C:\Users\Admin\AppData\Local\Temp\RuntimeBroke.exe
Size 47KB
SHA256 ec4426e656232d2b1bae80b4c875cf5f95a8aff3291c0577d1a9c2f33417c722
MD5 e45a8e0c92e70c3fa2d802c3632ca564
SHA1 9fcdc994edac796e14d0231f7448641a6c5ed601
SHA512 f12236bd0697f1da674430a51b0cc47feb2c68cbb0c21266ba62263d28adeb09938e0d9a858963838965fe117a0fb1aa8d89df15d154c4635de09040cc25e443
SSDEEP 768:gtdNILaiWW+ri2I7Vf2ki6U8YbKgem2YVsPqvEgK/J/ZVc6KN:gtV6jovzbdfuSnkJ/ZVclN
MD5 SHA1 SHA512 SSDEEP

Submit Download

tmpD050.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpD050.tmp.bat
Size 159B
SHA256 482389012125f9b8593f6b4f96a8b1b46a82fe2987f160923f4b7e06d5a5c799
MD5 32f5725fb1291bc80362ea39f0e375c8
SHA1 3228c79950bf85b1d67d9fe55198331616a2a67f
SHA512 f590bde6be8877acdd3fa0949a63e13dfdead0cf19587c428b84837005d04c533c2a144d1a6ca3463541fa3f5dfa8bcac0c156d34ec5ec028dd8c3d47ff84f80
MD5 SHA1 SHA512

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memory/1848-133-0x0000000000750000-0x0000000000762000-memory.dmp

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memory/1848-134-0x00007FFD4F150000-0x00007FFD4FC11000-memory.dmp

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memory/1848-135-0x000000001B490000-0x000000001B4A0000-memory.dmp

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memory/1848-140-0x00007FFD4F150000-0x00007FFD4FC11000-memory.dmp

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memory/2660-145-0x00007FFD4F150000-0x00007FFD4FC11000-memory.dmp

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memory/2660-146-0x000000001AD10000-0x000000001AD20000-memory.dmp

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memory/2660-147-0x00007FFD4F150000-0x00007FFD4FC11000-memory.dmp

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memory/2660-148-0x000000001AD10000-0x000000001AD20000-memory.dmp

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memory/2660-149-0x00007FFD5A030000-0x00007FFD5A049000-memory.dmp

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