asyncrat | 17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e

General

Target

17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e.exe
Size

74KB
MD5

31548bc072b604c0617e5ebcf7fc60b4
SHA1

035e68c49525e477ca5e61f77e1f8fdd4955b722
SHA256

17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e
SHA512

9848a6406fa2b6ff3046dd147eb94583fb637a2598dc332905b2a98e171814d3d76554bcf54a909503577fab85ccccf29ae475f614edd3f30e0a62afe8696cb1
SSDEEP

1536:mUJQcxAz6/CTGPMVfe9VdQuDI6H1bf/gqcnSQzcaLVclN:mUWcxAW/4GPMVfe9VdQsH1bfQnSQLBY

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

Mutex

WindowsRuntimeBrokerService

Attributes

delay
1
install
true
install_file
Microsoft\Windows\Themes\RuntimeBroker.exe
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/xcd2XZ5Q

aes.plain

Signatures

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

VenomRAT 3 IoCs

Detects VenomRAT.

rat

Processes:

resource	yara_rule
behavioral1/memory/1932-1-0x0000000000A60000-0x0000000000A78000-memory.dmp	VenomRAT
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Themes\RuntimeBroker.exe	VenomRAT
behavioral1/memory/2876-18-0x0000000001190000-0x00000000011A8000-memory.dmp	VenomRAT

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Themes\RuntimeBroker.exe	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

RuntimeBroker.exe

pid process

2876 RuntimeBroker.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

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

System Information Discovery
T1082
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2764 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

3008 schtasks.exe

pid	process
2876	RuntimeBroker.exe

flow	ioc
4	pastebin.com
5	pastebin.com

pid	process
2764	timeout.exe

pid	process
3008	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e.exeRuntimeBroker.exe

pid	process
1932	17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e.exe
1932	17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e.exe
1932	17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e.exe
2876	RuntimeBroker.exe
2876	RuntimeBroker.exe
2876	RuntimeBroker.exe
2876	RuntimeBroker.exe
2876	RuntimeBroker.exe
2876	RuntimeBroker.exe
2876	RuntimeBroker.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e.exeRuntimeBroker.exe

description	pid	process
Token: SeDebugPrivilege	1932	17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e.exe
Token: SeDebugPrivilege	1932	17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e.exe
Token: SeDebugPrivilege	2876	RuntimeBroker.exe
Token: SeDebugPrivilege	2876	RuntimeBroker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RuntimeBroker.exe

pid process

2876 RuntimeBroker.exe

pid	process
2876	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e.execmd.execmd.exe

description	pid	process	target process
PID 1932 wrote to memory of 1344	1932	17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e.exe	cmd.exe
PID 1932 wrote to memory of 1344	1932	17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e.exe	cmd.exe
PID 1932 wrote to memory of 1344	1932	17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e.exe	cmd.exe
PID 1932 wrote to memory of 2784	1932	17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e.exe	cmd.exe
PID 1932 wrote to memory of 2784	1932	17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e.exe	cmd.exe
PID 1932 wrote to memory of 2784	1932	17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e.exe	cmd.exe
PID 2784 wrote to memory of 2764	2784	cmd.exe	timeout.exe
PID 2784 wrote to memory of 2764	2784	cmd.exe	timeout.exe
PID 2784 wrote to memory of 2764	2784	cmd.exe	timeout.exe
PID 1344 wrote to memory of 3008	1344	cmd.exe	schtasks.exe
PID 1344 wrote to memory of 3008	1344	cmd.exe	schtasks.exe
PID 1344 wrote to memory of 3008	1344	cmd.exe	schtasks.exe
PID 2784 wrote to memory of 2876	2784	cmd.exe	RuntimeBroker.exe
PID 2784 wrote to memory of 2876	2784	cmd.exe	RuntimeBroker.exe
PID 2784 wrote to memory of 2876	2784	cmd.exe	RuntimeBroker.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e.exe
"C:\Users\Admin\AppData\Local\Temp\17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1932
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "RuntimeBroker" /tr '"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Themes\RuntimeBroker.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1344
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "RuntimeBroker" /tr '"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Themes\RuntimeBroker.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3008
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpA91B.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2784
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2764
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Themes\RuntimeBroker.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Themes\RuntimeBroker.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2876

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmpA91B.tmp.bat

Filesize
182B

MD5
0912d6cf56fbfe225572d40d00fdf691

SHA1
42d0b106cc7497ce476e9e7e50829549e0431ae6

SHA256
21048e7d5ec78f1c5c55af09e2ffb310c4567e5ed7d59719dd35bad5d029a82f

SHA512
19e3016affe7cc77dce65b7c9ceb0c2cf42d116f171930aeff787f5081d17b6b87e78835d324f674a527f68b22d4195f397c81d7f57aa4695b04d597ecccae3d

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Themes\RuntimeBroker.exe

Filesize
74KB

MD5
31548bc072b604c0617e5ebcf7fc60b4

SHA1
035e68c49525e477ca5e61f77e1f8fdd4955b722

SHA256
17dc9571dbd7e094dd65a862adfcde7328a3c3e45c9053ba99bff638e7918b4e

SHA512
9848a6406fa2b6ff3046dd147eb94583fb637a2598dc332905b2a98e171814d3d76554bcf54a909503577fab85ccccf29ae475f614edd3f30e0a62afe8696cb1

Download Submit
C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
memory/1932-0-0x000007FEF5873000-0x000007FEF5874000-memory.dmp

Filesize
4KB

Download
memory/1932-1-0x0000000000A60000-0x0000000000A78000-memory.dmp

Filesize
96KB

Download
memory/1932-3-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

Filesize
9.9MB

Download
memory/1932-12-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

Filesize
9.9MB

Download
memory/1932-14-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

Filesize
9.9MB

Download
memory/2876-18-0x0000000001190000-0x00000000011A8000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads