asyncrat | dd6f0b9730529cfe145d5585eccfb6c68510758d16ffd02043bd1fe73842ee1b

Resubmissions

07-11-2024 16:29

241107-tzeqvawbpe 10

07-11-2024 06:54

241107-hpd6sazqap 10

Analysis

max time kernel
141s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07-11-2024 16:29

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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
behavioral12/files/0x000f000000023b72-13.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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe

Executes dropped EXE 1 IoCs

pid	Process
1440	12376w8q09dq.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
444	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
2908	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
Token: SeDebugPrivilege	1440	12376w8q09dq.exe
Token: SeDebugPrivilege	1440	12376w8q09dq.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3776 wrote to memory of 3080	3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	91
PID 3776 wrote to memory of 3080	3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	91
PID 3776 wrote to memory of 3080	3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	91
PID 3776 wrote to memory of 4956	3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	93
PID 3776 wrote to memory of 4956	3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	93
PID 3776 wrote to memory of 4956	3776	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	93
PID 3080 wrote to memory of 2908	3080	cmd.exe	95
PID 3080 wrote to memory of 2908	3080	cmd.exe	95
PID 3080 wrote to memory of 2908	3080	cmd.exe	95
PID 4956 wrote to memory of 444	4956	cmd.exe	96
PID 4956 wrote to memory of 444	4956	cmd.exe	96
PID 4956 wrote to memory of 444	4956	cmd.exe	96
PID 4956 wrote to memory of 1440	4956	cmd.exe	98
PID 4956 wrote to memory of 1440	4956	cmd.exe	98
PID 4956 wrote to memory of 1440	4956	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
"C:\Users\Admin\AppData\Local\Temp\878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3776
- 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:3080
- - 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:2908
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA316.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4956
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:444
- - 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:1440

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

Query Registry

T1012

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\tmpA316.tmp.bat

Filesize
156B

MD5
174e8b5874cb0d5f5e19d6c55e17e5b5

SHA1
c64fc4170fd3169998ba09e47d54242c87be4a2c

SHA256
6e0cbb568ada1d53373be5ec20544a1aad40052158444b66e93de2bc5503270c

SHA512
92c0bf683ae13f0d816178fc1126d198c7a9d479e1a47906838a87313910aad2dd38ba0e23699be875200ba6eea11f675a85a31b05ac6b2ad824c8a73c1483ec

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

Filesize
45KB

MD5
5af5a9087ecf42eb83fb358d49b06e92

SHA1
0d4a5c5d90e6306c476036ca097a01a17b4295db

SHA256
878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453

SHA512
d0608f648dd26b81d262741c373737dba3bfeb1508f86d8c448ec634a78bd9f86f52961d22cf027418c5012f2f7388928480495003dfeac7b94deb590bb7d22c

Download Submit
memory/1440-14-0x0000000075230000-0x00000000759E0000-memory.dmp

Filesize
7.7MB

Download
memory/1440-15-0x0000000075230000-0x00000000759E0000-memory.dmp

Filesize
7.7MB

Download
memory/3776-0-0x00000000752CE000-0x00000000752CF000-memory.dmp

Filesize
4KB

Download
memory/3776-1-0x0000000000950000-0x0000000000962000-memory.dmp

Filesize
72KB

Download
memory/3776-2-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/3776-3-0x0000000005340000-0x00000000053A6000-memory.dmp

Filesize
408KB

Download
memory/3776-4-0x0000000005790000-0x000000000582C000-memory.dmp

Filesize
624KB

Download
memory/3776-9-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download