asyncrat | dd6f0b9730529cfe145d5585eccfb6c68510758d16ffd02043bd1fe73842ee1b

Resubmissions

07-11-2024 16:29

241107-tzeqvawbpe 10

07-11-2024 06:54

241107-hpd6sazqap 10

Analysis

max time kernel
140s
max time network
144s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
07-11-2024 06:54

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General

Target

878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
Size

45KB
MD5

5af5a9087ecf42eb83fb358d49b06e92
SHA1

0d4a5c5d90e6306c476036ca097a01a17b4295db
SHA256

878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453
SHA512

d0608f648dd26b81d262741c373737dba3bfeb1508f86d8c448ec634a78bd9f86f52961d22cf027418c5012f2f7388928480495003dfeac7b94deb590bb7d22c
SSDEEP

768:Qu08dTbAoeyWUE++Ymo2q8EpL2d78tPIAzjbygX3i46U44rylUVkBDZax:Qu08dTbfz2ESA3b1XSHULy9dax

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

206.123.141.239:7777

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
12376w8q09dq.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral11/files/0x0007000000012117-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
3020	12376w8q09dq.exe

Loads dropped DLL 1 IoCs

pid	Process
3016	cmd.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	12376w8q09dq.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2544	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2808	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2112	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
2112	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
2112	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2112	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
Token: SeDebugPrivilege	3020	12376w8q09dq.exe
Token: SeDebugPrivilege	3020	12376w8q09dq.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2112 wrote to memory of 2712	2112	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	31
PID 2112 wrote to memory of 2712	2112	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	31
PID 2112 wrote to memory of 2712	2112	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	31
PID 2112 wrote to memory of 2712	2112	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	31
PID 2112 wrote to memory of 3016	2112	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	33
PID 2112 wrote to memory of 3016	2112	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	33
PID 2112 wrote to memory of 3016	2112	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	33
PID 2112 wrote to memory of 3016	2112	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	33
PID 2712 wrote to memory of 2808	2712	cmd.exe	35
PID 2712 wrote to memory of 2808	2712	cmd.exe	35
PID 2712 wrote to memory of 2808	2712	cmd.exe	35
PID 2712 wrote to memory of 2808	2712	cmd.exe	35
PID 3016 wrote to memory of 2544	3016	cmd.exe	36
PID 3016 wrote to memory of 2544	3016	cmd.exe	36
PID 3016 wrote to memory of 2544	3016	cmd.exe	36
PID 3016 wrote to memory of 2544	3016	cmd.exe	36
PID 3016 wrote to memory of 3020	3016	cmd.exe	37
PID 3016 wrote to memory of 3020	3016	cmd.exe	37
PID 3016 wrote to memory of 3020	3016	cmd.exe	37
PID 3016 wrote to memory of 3020	3016	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
"C:\Users\Admin\AppData\Local\Temp\878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2112
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "12376w8q09dq" /tr '"C:\Users\Admin\AppData\Roaming\12376w8q09dq.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2712
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "12376w8q09dq" /tr '"C:\Users\Admin\AppData\Roaming\12376w8q09dq.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2808
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpA5D.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3016
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2544
- - C:\Users\Admin\AppData\Roaming\12376w8q09dq.exe
    "C:\Users\Admin\AppData\Roaming\12376w8q09dq.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:3020

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpA5D.tmp.bat

Filesize
155B

MD5
e20ea2b1fc2d8565c40c086718f2d4e8

SHA1
1a44076cff43b56b9d13346e23a05f42ab42cda8

SHA256
95d05ee7b2ffbaa98d724bf5dac51d403db9ccce88b7528375820aae40299f6f

SHA512
79f0d7ba49831e0422aec8c0c3a40c552e85486e98803e53d1b14b190f5875b1599338b097b73aa3bd5e5ba21a3c612f9559ad57481e26f60d7139bc4c128b43

Download Submit
\Users\Admin\AppData\Roaming\12376w8q09dq.exe

Filesize
45KB

MD5
5af5a9087ecf42eb83fb358d49b06e92

SHA1
0d4a5c5d90e6306c476036ca097a01a17b4295db

SHA256
878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453

SHA512
d0608f648dd26b81d262741c373737dba3bfeb1508f86d8c448ec634a78bd9f86f52961d22cf027418c5012f2f7388928480495003dfeac7b94deb590bb7d22c

Download Submit
memory/2112-0-0x000000007483E000-0x000000007483F000-memory.dmp

Filesize
4KB

Download
memory/2112-1-0x0000000000DF0000-0x0000000000E02000-memory.dmp

Filesize
72KB

Download
memory/2112-2-0x0000000074830000-0x0000000074F1E000-memory.dmp

Filesize
6.9MB

Download
memory/2112-12-0x0000000074830000-0x0000000074F1E000-memory.dmp

Filesize
6.9MB

Download
memory/3020-16-0x0000000000B30000-0x0000000000B42000-memory.dmp

Filesize
72KB

Download