asyncrat | dd6f0b9730529cfe145d5585eccfb6c68510758d16ffd02043bd1fe73842ee1b

Resubmissions

07-11-2024 16:29

241107-tzeqvawbpe 10

07-11-2024 06:54

241107-hpd6sazqap 10

Analysis

max time kernel
142s
max time network
150s
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 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

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\12376w8q09dq.exe	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

Processes:

878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe

Executes dropped EXE 1 IoCs

Processes:

12376w8q09dq.exe

pid process

2396 12376w8q09dq.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2396	12376w8q09dq.exe

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

Processes:

12376w8q09dq.exe878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.execmd.execmd.exeschtasks.exetimeout.exe

description	ioc	process
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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1576 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

Processes:

schtasks.exe

pid process

2692 schtasks.exe

pid	process
1576	timeout.exe

pid	process
2692	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe

pid	process
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe12376w8q09dq.exe

description	pid	process
Token: SeDebugPrivilege	4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe
Token: SeDebugPrivilege	2396	12376w8q09dq.exe
Token: SeDebugPrivilege	2396	12376w8q09dq.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.execmd.execmd.exe

description	pid	process	target process
PID 4084 wrote to memory of 2000	4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	cmd.exe
PID 4084 wrote to memory of 2000	4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	cmd.exe
PID 4084 wrote to memory of 2000	4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	cmd.exe
PID 4084 wrote to memory of 3424	4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	cmd.exe
PID 4084 wrote to memory of 3424	4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	cmd.exe
PID 4084 wrote to memory of 3424	4084	878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453.exe	cmd.exe
PID 2000 wrote to memory of 2692	2000	cmd.exe	schtasks.exe
PID 2000 wrote to memory of 2692	2000	cmd.exe	schtasks.exe
PID 2000 wrote to memory of 2692	2000	cmd.exe	schtasks.exe
PID 3424 wrote to memory of 1576	3424	cmd.exe	timeout.exe
PID 3424 wrote to memory of 1576	3424	cmd.exe	timeout.exe
PID 3424 wrote to memory of 1576	3424	cmd.exe	timeout.exe
PID 3424 wrote to memory of 2396	3424	cmd.exe	12376w8q09dq.exe
PID 3424 wrote to memory of 2396	3424	cmd.exe	12376w8q09dq.exe
PID 3424 wrote to memory of 2396	3424	cmd.exe	12376w8q09dq.exe

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:4084
- 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:2000
- - 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:2692
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpAAD6.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3424
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1576
- - 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:2396

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\tmpAAD6.tmp.bat

Filesize
156B

MD5
46646f9376c0a899495a2ed668bd1232

SHA1
d76ecb685230a108c8bb2b8dd8330ab06feb5ecb

SHA256
6145f8cb161e602b77aa754bcdff4a7aa39ccf3bb80dcabb693581daf5ec89c8

SHA512
d74d3fce1f979eebffa5fc50a899eed2d82243086664e6e6d3cc310a2dea4384506eb1d9a29c645d5d61f9eca2b1d06cb01032f9b2e615b4e15bb931c8e28a45

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

Filesize
45KB

MD5
5af5a9087ecf42eb83fb358d49b06e92

SHA1
0d4a5c5d90e6306c476036ca097a01a17b4295db

SHA256
878487e25eb96ab2c4ebd889e4bfc1739d730722c2af4736bc46ac3d11eca453

SHA512
d0608f648dd26b81d262741c373737dba3bfeb1508f86d8c448ec634a78bd9f86f52961d22cf027418c5012f2f7388928480495003dfeac7b94deb590bb7d22c

Download Submit
memory/2396-14-0x0000000074420000-0x0000000074BD0000-memory.dmp

Filesize
7.7MB

Download
memory/2396-15-0x0000000074420000-0x0000000074BD0000-memory.dmp

Filesize
7.7MB

Download
memory/4084-0-0x00000000744DE000-0x00000000744DF000-memory.dmp

Filesize
4KB

Download
memory/4084-1-0x00000000004C0000-0x00000000004D2000-memory.dmp

Filesize
72KB

Download
memory/4084-2-0x00000000744D0000-0x0000000074C80000-memory.dmp

Filesize
7.7MB

Download
memory/4084-3-0x0000000004D10000-0x0000000004D76000-memory.dmp

Filesize
408KB

Download
memory/4084-4-0x00000000051D0000-0x000000000526C000-memory.dmp

Filesize
624KB

Download
memory/4084-9-0x00000000744D0000-0x0000000074C80000-memory.dmp

Filesize
7.7MB

Download