asyncrat | ea3c775091e46699351431b25485fae1526c063a3b1be543cdc1c5c4ee397d92

General

Target

Client.exe
Size

74KB
MD5

6d047d603a107c3193aef35717af7b6f
SHA1

32034f120ac1c1132e137ddba1e6220aacb702a2
SHA256

ea3c775091e46699351431b25485fae1526c063a3b1be543cdc1c5c4ee397d92
SHA512

00ea5f0686d40dbae3958cb67324fdf8c0f1d493af497b84d0989437c14166e10ffae370f62d8c0eeb929e9ca65aa20ffcc815b8d585a9b2f53c062b04cd2639
SSDEEP

1536:9UOgcxLVNCBWPMVWe9VdQuDI6H1bf/4VAQzcmLVclN:9UfcxLfaWPMVWe9VdQsH1bfgeQ/BY

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

127.0.0.1:4449

Mutex

bgflrgweuset

Attributes

delay
1
install
true
install_file
defender.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
behavioral1/files/0x001e00000002aa82-12.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2932	defender.exe

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

pid	Process
4128	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
3556	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4880	Client.exe
4880	Client.exe
4880	Client.exe
4880	Client.exe
4880	Client.exe
4880	Client.exe
4880	Client.exe
4880	Client.exe
4880	Client.exe
4880	Client.exe
4880	Client.exe
4880	Client.exe
4880	Client.exe
4880	Client.exe
4880	Client.exe
4880	Client.exe
4880	Client.exe
2932	defender.exe
2932	defender.exe
2932	defender.exe
2932	defender.exe
2932	defender.exe
2932	defender.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4880	Client.exe
Token: SeDebugPrivilege	2932	defender.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2932	defender.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4880 wrote to memory of 72	4880	Client.exe	77
PID 4880 wrote to memory of 72	4880	Client.exe	77
PID 4880 wrote to memory of 4256	4880	Client.exe	78
PID 4880 wrote to memory of 4256	4880	Client.exe	78
PID 4256 wrote to memory of 4128	4256	cmd.exe	81
PID 4256 wrote to memory of 4128	4256	cmd.exe	81
PID 72 wrote to memory of 3556	72	cmd.exe	82
PID 72 wrote to memory of 3556	72	cmd.exe	82
PID 4256 wrote to memory of 2932	4256	cmd.exe	83
PID 4256 wrote to memory of 2932	4256	cmd.exe	83

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\Client.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4880
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "defender" /tr '"C:\Users\Admin\AppData\Roaming\defender.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:72
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "defender" /tr '"C:\Users\Admin\AppData\Roaming\defender.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3556
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA27A.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4256
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4128
- - C:\Users\Admin\AppData\Roaming\defender.exe
    "C:\Users\Admin\AppData\Roaming\defender.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2932

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

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpA27A.tmp.bat

Filesize
152B

MD5
a8d61d9b03a230170d40b85c8b63b6a5

SHA1
cb141c3af5385b8beaab19d9362745e36a33a0d9

SHA256
1b6f16bfc9e04753a0fca611beb92e06c709c8ac7ef0c28810dab2d15ca49f54

SHA512
89ed3701d12acb6193a1a9c052ada0cdeb28c767a937ad283d0fc77716976deefa0a5d104a0e238410fed841f8aa78c7feb61e63623e62d8688d84255e1ba5fe

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

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
C:\Users\Admin\AppData\Roaming\defender.exe

Filesize
74KB

MD5
6d047d603a107c3193aef35717af7b6f

SHA1
32034f120ac1c1132e137ddba1e6220aacb702a2

SHA256
ea3c775091e46699351431b25485fae1526c063a3b1be543cdc1c5c4ee397d92

SHA512
00ea5f0686d40dbae3958cb67324fdf8c0f1d493af497b84d0989437c14166e10ffae370f62d8c0eeb929e9ca65aa20ffcc815b8d585a9b2f53c062b04cd2639

Download Submit
memory/4880-0-0x00007FF8F3493000-0x00007FF8F3495000-memory.dmp

Filesize
8KB

Download
memory/4880-1-0x0000000000A30000-0x0000000000A48000-memory.dmp

Filesize
96KB

Download
memory/4880-3-0x00007FF8F3490000-0x00007FF8F3F52000-memory.dmp

Filesize
10.8MB

Download
memory/4880-4-0x00007FF8F3490000-0x00007FF8F3F52000-memory.dmp

Filesize
10.8MB

Download
memory/4880-9-0x00007FF8F3490000-0x00007FF8F3F52000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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