asyncrat | f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d

General

Target

f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d.exe
Size

82KB
MD5

401cdb3441eaa85c7d5d85b8cfe0fe54
SHA1

6bbb659c5c2b30c24313efa7a3775b78cbf385c5
SHA256

f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d
SHA512

fb70afc7e5a382b3970cf92feaa12c4cfeba7a7dbca0d0f8736b5a38c0e4c42204cf4975081eab940524332fd3067bc4d5da053b55e71f983e01bc20454822bf
SSDEEP

1536:x6UzwcxbUTCrmPMVAsP1K4I3H1bL/2sQzcH33LjVclN:wU0cxbgwmPMVA8wBH1bLesQK33LJY

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

127.0.0.1:9001

91.92.254.89:4449

91.92.254.89:9001

Mutex

fefewfewfewf

Attributes

delay
1
install
true
install_file
Realltek Audio Service 86x.exe
install_folder
%AppData%

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/2508-1-0x0000000001310000-0x000000000132A000-memory.dmp	VenomRAT
C:\Users\Admin\AppData\Roaming\Realltek Audio Service 86x.exe	VenomRAT
behavioral1/memory/2748-18-0x0000000001120000-0x000000000113A000-memory.dmp	VenomRAT

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Realltek Audio Service 86x.exe	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

Realltek Audio Service 86x.exe

pid process

2748 Realltek Audio Service 86x.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

Processes:

timeout.exe

pid process

1568 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

2404 schtasks.exe

pid	process
2748	Realltek Audio Service 86x.exe

pid	process
1568	timeout.exe

pid	process
2404	schtasks.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

Processes:

f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d.exeRealltek Audio Service 86x.exe

pid	process
2508	f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d.exe
2748	Realltek Audio Service 86x.exe
2748	Realltek Audio Service 86x.exe
2748	Realltek Audio Service 86x.exe
2748	Realltek Audio Service 86x.exe
2748	Realltek Audio Service 86x.exe
2748	Realltek Audio Service 86x.exe
2748	Realltek Audio Service 86x.exe
2748	Realltek Audio Service 86x.exe
2748	Realltek Audio Service 86x.exe
2748	Realltek Audio Service 86x.exe
2748	Realltek Audio Service 86x.exe
2748	Realltek Audio Service 86x.exe
2748	Realltek Audio Service 86x.exe
2748	Realltek Audio Service 86x.exe
2748	Realltek Audio Service 86x.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d.exeRealltek Audio Service 86x.exe

description	pid	process
Token: SeDebugPrivilege	2508	f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d.exe
Token: SeDebugPrivilege	2748	Realltek Audio Service 86x.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Realltek Audio Service 86x.exe

pid process

2748 Realltek Audio Service 86x.exe

pid	process
2748	Realltek Audio Service 86x.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d.execmd.execmd.exe

description	pid	process	target process
PID 2508 wrote to memory of 2240	2508	f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d.exe	cmd.exe
PID 2508 wrote to memory of 2240	2508	f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d.exe	cmd.exe
PID 2508 wrote to memory of 2240	2508	f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d.exe	cmd.exe
PID 2508 wrote to memory of 1572	2508	f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d.exe	cmd.exe
PID 2508 wrote to memory of 1572	2508	f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d.exe	cmd.exe
PID 2508 wrote to memory of 1572	2508	f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d.exe	cmd.exe
PID 1572 wrote to memory of 1568	1572	cmd.exe	timeout.exe
PID 1572 wrote to memory of 1568	1572	cmd.exe	timeout.exe
PID 1572 wrote to memory of 1568	1572	cmd.exe	timeout.exe
PID 2240 wrote to memory of 2404	2240	cmd.exe	schtasks.exe
PID 2240 wrote to memory of 2404	2240	cmd.exe	schtasks.exe
PID 2240 wrote to memory of 2404	2240	cmd.exe	schtasks.exe
PID 1572 wrote to memory of 2748	1572	cmd.exe	Realltek Audio Service 86x.exe
PID 1572 wrote to memory of 2748	1572	cmd.exe	Realltek Audio Service 86x.exe
PID 1572 wrote to memory of 2748	1572	cmd.exe	Realltek Audio Service 86x.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\f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d.exe
"C:\Users\Admin\AppData\Local\Temp\f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2508
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Realltek Audio Service 86x" /tr '"C:\Users\Admin\AppData\Roaming\Realltek Audio Service 86x.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2240
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Realltek Audio Service 86x" /tr '"C:\Users\Admin\AppData\Roaming\Realltek Audio Service 86x.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2404
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp46B1.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1572
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1568
- - C:\Users\Admin\AppData\Roaming\Realltek Audio Service 86x.exe
    "C:\Users\Admin\AppData\Roaming\Realltek Audio Service 86x.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2748

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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C:\Users\Admin\AppData\Local\Temp\tmp46B1.tmp.bat

Filesize
170B

MD5
a914ff74ebae97d7bb3ca09d0f15731c

SHA1
46573bd678d2ddd6b106c7bea0d31a8af7076810

SHA256
96a92756c469b12092d64bfe1eb9f80efd8ba27e51791f0a1e05796db2e7bb54

SHA512
334a64ac28dbca0172e19685ba4ab95126cb8a82e6e29ba0ff8a29b188775644a9077672a8c106f376540bc1a42eb7dfa3bd3da1a8413ea0237421b381d2edbc

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\Realltek Audio Service 86x.exe

Filesize
82KB

MD5
401cdb3441eaa85c7d5d85b8cfe0fe54

SHA1
6bbb659c5c2b30c24313efa7a3775b78cbf385c5

SHA256
f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d

SHA512
fb70afc7e5a382b3970cf92feaa12c4cfeba7a7dbca0d0f8736b5a38c0e4c42204cf4975081eab940524332fd3067bc4d5da053b55e71f983e01bc20454822bf

Download Submit
memory/2508-0-0x000007FEF6523000-0x000007FEF6524000-memory.dmp

Filesize
4KB

Download
memory/2508-1-0x0000000001310000-0x000000000132A000-memory.dmp

Filesize
104KB

Download
memory/2508-3-0x000007FEF6520000-0x000007FEF6F0C000-memory.dmp

Filesize
9.9MB

Download
memory/2508-4-0x000007FEF6520000-0x000007FEF6F0C000-memory.dmp

Filesize
9.9MB

Download
memory/2508-13-0x000007FEF6520000-0x000007FEF6F0C000-memory.dmp

Filesize
9.9MB

Download
memory/2748-18-0x0000000001120000-0x000000000113A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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