asyncrat | f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d

General

Target

Pin-Cracker.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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x0009000000015ce6-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
1256	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

pid	Process
2300	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
2864	schtasks.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
2280	Pin-Cracker.exe
2280	Pin-Cracker.exe
1256	Realltek Audio Service 86x.exe
1256	Realltek Audio Service 86x.exe
1256	Realltek Audio Service 86x.exe
1256	Realltek Audio Service 86x.exe
1256	Realltek Audio Service 86x.exe
1256	Realltek Audio Service 86x.exe
1256	Realltek Audio Service 86x.exe
1256	Realltek Audio Service 86x.exe
1256	Realltek Audio Service 86x.exe
1256	Realltek Audio Service 86x.exe
1256	Realltek Audio Service 86x.exe
1256	Realltek Audio Service 86x.exe
1256	Realltek Audio Service 86x.exe
1256	Realltek Audio Service 86x.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2280	Pin-Cracker.exe
Token: SeDebugPrivilege	1256	Realltek Audio Service 86x.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1256	Realltek Audio Service 86x.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 764	2280	Pin-Cracker.exe	28
PID 2280 wrote to memory of 764	2280	Pin-Cracker.exe	28
PID 2280 wrote to memory of 764	2280	Pin-Cracker.exe	28
PID 2280 wrote to memory of 2068	2280	Pin-Cracker.exe	29
PID 2280 wrote to memory of 2068	2280	Pin-Cracker.exe	29
PID 2280 wrote to memory of 2068	2280	Pin-Cracker.exe	29
PID 2068 wrote to memory of 2300	2068	cmd.exe	32
PID 2068 wrote to memory of 2300	2068	cmd.exe	32
PID 2068 wrote to memory of 2300	2068	cmd.exe	32
PID 764 wrote to memory of 2864	764	cmd.exe	33
PID 764 wrote to memory of 2864	764	cmd.exe	33
PID 764 wrote to memory of 2864	764	cmd.exe	33
PID 2068 wrote to memory of 1256	2068	cmd.exe	36
PID 2068 wrote to memory of 1256	2068	cmd.exe	36
PID 2068 wrote to memory of 1256	2068	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\Pin-Cracker.exe
"C:\Users\Admin\AppData\Local\Temp\Pin-Cracker.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2280
- 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:764
- - 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:2864
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpC8EA.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2068
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2300
- - 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:1256

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\tmpC8EA.tmp.bat

Filesize
170B

MD5
df66498410fab22b03e262f15070ae6e

SHA1
7c40b17ee3b6522997e6cd3b5723e1eab0ec39a0

SHA256
b9556d7a068ee1a6cf4eb3200508bd6d73bf1aeb735f90d7114878f5e2a0d453

SHA512
cd9dedc5c452961f8098186cfbf3e266dc06146976b588b08a286001b73687c9f2c631591614ed8b7054b2522974b4a9f723865f3a2bf4762319c3ae0a997f07

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

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

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

Filesize
82KB

MD5
401cdb3441eaa85c7d5d85b8cfe0fe54

SHA1
6bbb659c5c2b30c24313efa7a3775b78cbf385c5

SHA256
f1cf79e0ebbb693d10ca8b96d6c6aae0176c3a3417512bacaf0016207e60492d

SHA512
fb70afc7e5a382b3970cf92feaa12c4cfeba7a7dbca0d0f8736b5a38c0e4c42204cf4975081eab940524332fd3067bc4d5da053b55e71f983e01bc20454822bf

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memory/1256-18-0x0000000000260000-0x000000000027A000-memory.dmp

Filesize
104KB

Download
memory/2280-0-0x000007FEF5B23000-0x000007FEF5B24000-memory.dmp

Filesize
4KB

Download
memory/2280-1-0x0000000000300000-0x000000000031A000-memory.dmp

Filesize
104KB

Download
memory/2280-3-0x000007FEF5B20000-0x000007FEF650C000-memory.dmp

Filesize
9.9MB

Download
memory/2280-11-0x000007FEF5B20000-0x000007FEF650C000-memory.dmp

Filesize
9.9MB

Download
memory/2280-13-0x000007FEF5B20000-0x000007FEF650C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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