asyncrat | dca4f9884f0b0f5a1c534b3b2d867714b6ea7eac807bacf9e487e9a8d7e34355

General

Target

IYBF9_Client.exe
Size

74KB
MD5

4e621ed074da8d121a8f419c00cb4c3a
SHA1

723df7256adbaddecf269abfd255d28b5b860f1e
SHA256

dca4f9884f0b0f5a1c534b3b2d867714b6ea7eac807bacf9e487e9a8d7e34355
SHA512

77ebc87c1582d1f83195d2dd0f76432f895acac7b07cb1bca6599d7c42d83a544abcf719d9d80fc6e51cda05c6d9e3af06daed17a8fe970425030ab5fd0aaa1f
SSDEEP

1536:SUaAcx2l/Cx2PMVie9VdQuDI6H1bf/k0WQzcuLVclN:SUDcx2Bq2PMVie9VdQsH1bfcjQnBY

Score

10^/10

asyncrat venomrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

127.0.0.1:4449

5.20.104.111:4449

Mutex

kekagthwfcue

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

VenomRAT 3 IoCs

Detects VenomRAT.

rat

resource	yara_rule
behavioral1/memory/2824-1-0x0000000001360000-0x0000000001378000-memory.dmp	VenomRAT
behavioral1/files/0x003500000001543d-16.dat	VenomRAT
behavioral1/memory/2504-18-0x0000000000BE0000-0x0000000000BF8000-memory.dmp	VenomRAT

Venomrat family
venomrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x003500000001543d-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2504	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
2524	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
2548	schtasks.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
2824	IYBF9_Client.exe
2824	IYBF9_Client.exe
2824	IYBF9_Client.exe
2504	defender.exe
2504	defender.exe
2504	defender.exe
2504	defender.exe
2504	defender.exe
2504	defender.exe
2504	defender.exe
2504	defender.exe
2504	defender.exe
2504	defender.exe
2504	defender.exe
2504	defender.exe
2504	defender.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2824	IYBF9_Client.exe
Token: SeDebugPrivilege	2504	defender.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2504	defender.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2824 wrote to memory of 2688	2824	IYBF9_Client.exe	30
PID 2824 wrote to memory of 2688	2824	IYBF9_Client.exe	30
PID 2824 wrote to memory of 2688	2824	IYBF9_Client.exe	30
PID 2824 wrote to memory of 2872	2824	IYBF9_Client.exe	31
PID 2824 wrote to memory of 2872	2824	IYBF9_Client.exe	31
PID 2824 wrote to memory of 2872	2824	IYBF9_Client.exe	31
PID 2872 wrote to memory of 2524	2872	cmd.exe	34
PID 2872 wrote to memory of 2524	2872	cmd.exe	34
PID 2872 wrote to memory of 2524	2872	cmd.exe	34
PID 2688 wrote to memory of 2548	2688	cmd.exe	35
PID 2688 wrote to memory of 2548	2688	cmd.exe	35
PID 2688 wrote to memory of 2548	2688	cmd.exe	35
PID 2872 wrote to memory of 2504	2872	cmd.exe	36
PID 2872 wrote to memory of 2504	2872	cmd.exe	36
PID 2872 wrote to memory of 2504	2872	cmd.exe	36

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\IYBF9_Client.exe
"C:\Users\Admin\AppData\Local\Temp\IYBF9_Client.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2824
- 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:2688
- - 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:2548
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp64EB.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2872
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2524
- - 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:2504

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\tmp64EB.tmp.bat

Filesize
152B

MD5
024966be502d1c53c56a9d711cbe3501

SHA1
51eb31ad3b5a23dd0fcb33f61550dfb6459d5b56

SHA256
a5177774c45f85ff8b79c9360a1ce3914e4ddf5cfc13cbc99a15ccaa1945a2b1

SHA512
3902a61c9b06d0ad00f04b64bba02524aec237a6693f625b03a3b8b4aa4d2ff96f17780c1dace51b06a444a48adc38c8b10a497836e8fc1e599fbd974d751a92

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
4e621ed074da8d121a8f419c00cb4c3a

SHA1
723df7256adbaddecf269abfd255d28b5b860f1e

SHA256
dca4f9884f0b0f5a1c534b3b2d867714b6ea7eac807bacf9e487e9a8d7e34355

SHA512
77ebc87c1582d1f83195d2dd0f76432f895acac7b07cb1bca6599d7c42d83a544abcf719d9d80fc6e51cda05c6d9e3af06daed17a8fe970425030ab5fd0aaa1f

Download Submit
memory/2504-18-0x0000000000BE0000-0x0000000000BF8000-memory.dmp

Filesize
96KB

Download
memory/2824-0-0x000007FEF5433000-0x000007FEF5434000-memory.dmp

Filesize
4KB

Download
memory/2824-1-0x0000000001360000-0x0000000001378000-memory.dmp

Filesize
96KB

Download
memory/2824-3-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

Filesize
9.9MB

Download
memory/2824-11-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

Filesize
9.9MB

Download
memory/2824-13-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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