asyncrat | 497520bd8af26dd6dbfe4b826c6ecdbf984630ab781d2a036c5c4665dee74cd0

Analysis

max time kernel
150s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
14-01-2025 22:51

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General

Target

Client.exe
Size

74KB
MD5

0fe09ff32a803ee77f2ec9ce11cd8ee8
SHA1

efa706a603ff15c883383653e6fdffc8d4c057af
SHA256

497520bd8af26dd6dbfe4b826c6ecdbf984630ab781d2a036c5c4665dee74cd0
SHA512

fe73b409607796ad94359eb1e0fc1a9726b907e86ff1114baf353e6473946e615573baced6dcff89a21bb4b6b67d5094811fe396f2808d522f5b481b19c8c97e
SSDEEP

1536:UU1gcxe1eHCZWPMVKe9VdQuDI6H1bf/8UuQzcSbVclN:UUKcxe1ayWPMVKe9VdQsH1bf0HQDRY

Score

10^/10

asyncrat venomrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

127.0.0.1:4449

Mutex

124u12jrae908wai

Attributes

delay
1
install
true
install_file
boss.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

VenomRAT 3 IoCs

Detects VenomRAT.

rat

resource	yara_rule
behavioral1/memory/2420-1-0x0000000000040000-0x0000000000058000-memory.dmp	VenomRAT
behavioral1/files/0x0008000000014c66-16.dat	VenomRAT
behavioral1/memory/1856-18-0x0000000001000000-0x0000000001018000-memory.dmp	VenomRAT

Venomrat family
venomrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x0008000000014c66-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
1856	boss.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
2416	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
1380	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2420	Client.exe
2420	Client.exe
2420	Client.exe
2420	Client.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe
1856	boss.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2420	Client.exe
Token: SeDebugPrivilege	2420	Client.exe
Token: SeDebugPrivilege	1856	boss.exe
Token: SeDebugPrivilege	1856	boss.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1856	boss.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2420 wrote to memory of 2268	2420	Client.exe	28
PID 2420 wrote to memory of 2268	2420	Client.exe	28
PID 2420 wrote to memory of 2268	2420	Client.exe	28
PID 2420 wrote to memory of 2964	2420	Client.exe	29
PID 2420 wrote to memory of 2964	2420	Client.exe	29
PID 2420 wrote to memory of 2964	2420	Client.exe	29
PID 2964 wrote to memory of 2416	2964	cmd.exe	33
PID 2964 wrote to memory of 2416	2964	cmd.exe	33
PID 2964 wrote to memory of 2416	2964	cmd.exe	33
PID 2268 wrote to memory of 1380	2268	cmd.exe	32
PID 2268 wrote to memory of 1380	2268	cmd.exe	32
PID 2268 wrote to memory of 1380	2268	cmd.exe	32
PID 2964 wrote to memory of 1856	2964	cmd.exe	34
PID 2964 wrote to memory of 1856	2964	cmd.exe	34
PID 2964 wrote to memory of 1856	2964	cmd.exe	34

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:2420
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "boss" /tr '"C:\Users\Admin\AppData\Roaming\boss.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2268
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "boss" /tr '"C:\Users\Admin\AppData\Roaming\boss.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1380
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpA525.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2964
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2416
- - C:\Users\Admin\AppData\Roaming\boss.exe
    "C:\Users\Admin\AppData\Roaming\boss.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:1856

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpA525.tmp.bat

Filesize
148B

MD5
a761bb296e5b22a321bf508f22970775

SHA1
a14be7def31675b47da2b852f6552c3b60f4f91e

SHA256
e84cbccc2899704c3f56c9a30cb68556df7c7e89d65f3af7cdd8e8a473fc8a22

SHA512
596f2a3da1a88f4bcb3ca4ff3185c4254db221b96b88b9c7ae4fdecf554092b2d301736029098ac2a7f571c909232dc22f052fb0335c1cfd06062497bbbeefaf

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\boss.exe

Filesize
74KB

MD5
0fe09ff32a803ee77f2ec9ce11cd8ee8

SHA1
efa706a603ff15c883383653e6fdffc8d4c057af

SHA256
497520bd8af26dd6dbfe4b826c6ecdbf984630ab781d2a036c5c4665dee74cd0

SHA512
fe73b409607796ad94359eb1e0fc1a9726b907e86ff1114baf353e6473946e615573baced6dcff89a21bb4b6b67d5094811fe396f2808d522f5b481b19c8c97e

Download Submit
memory/1856-18-0x0000000001000000-0x0000000001018000-memory.dmp

Filesize
96KB

Download
memory/2420-0-0x000007FEF5FB3000-0x000007FEF5FB4000-memory.dmp

Filesize
4KB

Download
memory/2420-1-0x0000000000040000-0x0000000000058000-memory.dmp

Filesize
96KB

Download
memory/2420-3-0x000007FEF5FB0000-0x000007FEF699C000-memory.dmp

Filesize
9.9MB

Download
memory/2420-11-0x000007FEF5FB0000-0x000007FEF699C000-memory.dmp

Filesize
9.9MB

Download
memory/2420-14-0x000007FEF5FB0000-0x000007FEF699C000-memory.dmp

Filesize
9.9MB

Download