asyncrat | 520beb909a622e4a50bcbae7a43194deda3478a4fe2c4e4c81d939761076e23f

Analysis

max time kernel
143s
max time network
152s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
04/03/2023, 07:54

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General

Target

3550755b36a4944a5dfdcf54c092628e.exe
Size

619KB
MD5

3550755b36a4944a5dfdcf54c092628e
SHA1

d4d1538ac728e6a81e5f938b17d30d1377ab4352
SHA256

520beb909a622e4a50bcbae7a43194deda3478a4fe2c4e4c81d939761076e23f
SHA512

4d7e402a2694346fe7c41dda0b29272ae267b779683ab152f513123354203df4f031768a9d93035e17ddb4ad3a78581c2a5023ecc4d8f140eb0068f7a53073d0
SSDEEP

12288:zGdN/gKE0nbPbwFyyst+OMFWvBvWiv8i1w4buNNAXK7wAT/jNiaTMsoT:zcxgMnbPsF3st+OMFWvBvWiv8iK46NiT

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

154.91.228.23:8848

Mutex

DcRatMutex

Attributes

delay
1
install
false
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 3 IoCs

rat

resource	yara_rule
behavioral1/memory/1716-55-0x00000000002B0000-0x00000000002C2000-memory.dmp	asyncrat
behavioral1/memory/1716-77-0x00000000008D0000-0x00000000008DE000-memory.dmp	asyncrat
behavioral1/memory/1716-101-0x00000000023C0000-0x00000000023DA000-memory.dmp	asyncrat

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
544	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1716	3550755b36a4944a5dfdcf54c092628e.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1716 wrote to memory of 2024	1716	3550755b36a4944a5dfdcf54c092628e.exe	28
PID 1716 wrote to memory of 2024	1716	3550755b36a4944a5dfdcf54c092628e.exe	28
PID 1716 wrote to memory of 2024	1716	3550755b36a4944a5dfdcf54c092628e.exe	28
PID 1716 wrote to memory of 2024	1716	3550755b36a4944a5dfdcf54c092628e.exe	28
PID 2024 wrote to memory of 544	2024	cmd.exe	30
PID 2024 wrote to memory of 544	2024	cmd.exe	30
PID 2024 wrote to memory of 544	2024	cmd.exe	30
PID 2024 wrote to memory of 544	2024	cmd.exe	30

C:\Users\Admin\AppData\Local\Temp\3550755b36a4944a5dfdcf54c092628e.exe
"C:\Users\Admin\AppData\Local\Temp\3550755b36a4944a5dfdcf54c092628e.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1716
- C:\Windows\SysWOW64\cmd.exe
  "cmd"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2024
- - C:\Windows\SysWOW64\schtasks.exe
    SchTasks /Create /SC DAILY /TN "My Task" /TR "C:\Users\Admin\Documents\system???.exe /ST 19:00
    3⤵
    - Creates scheduled task(s)
    PID:544

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

Filesize
61KB

MD5
e71c8443ae0bc2e282c73faead0a6dd3

SHA1
0c110c1b01e68edfacaeae64781a37b1995fa94b

SHA256
95b0a5acc5bf70d3abdfd091d0c9f9063aa4fde65bd34dbf16786082e1992e72

SHA512
b38458c7fa2825afb72794f374827403d5946b1132e136a0ce075dfd351277cf7d957c88dc8a1e4adc3bcae1fa8010dae3831e268e910d517691de24326391a6

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar5394.tmp

Filesize
161KB

MD5
be2bec6e8c5653136d3e72fe53c98aa3

SHA1
a8182d6db17c14671c3d5766c72e58d87c0810de

SHA256
1919aab2a820642490169bdc4e88bd1189e22f83e7498bf8ebdfb62ec7d843fd

SHA512
0d1424ccdf0d53faf3f4e13d534e12f22388648aa4c23edbc503801e3c96b7f73c7999b760b5bef4b5e9dd923dffe21a21889b1ce836dd428420bf0f4f5327ff

Download Submit
memory/1716-55-0x00000000002B0000-0x00000000002C2000-memory.dmp

Filesize
72KB

Download
memory/1716-58-0x0000000004D30000-0x0000000004D70000-memory.dmp

Filesize
256KB

Download
memory/1716-59-0x0000000004D30000-0x0000000004D70000-memory.dmp

Filesize
256KB

Download
memory/1716-57-0x0000000004D30000-0x0000000004D70000-memory.dmp

Filesize
256KB

Download
memory/1716-56-0x0000000000130000-0x0000000000146000-memory.dmp

Filesize
88KB

Download
memory/1716-77-0x00000000008D0000-0x00000000008DE000-memory.dmp

Filesize
56KB

Download
memory/1716-98-0x0000000004D30000-0x0000000004D70000-memory.dmp

Filesize
256KB

Download
memory/1716-99-0x0000000004D30000-0x0000000004D70000-memory.dmp

Filesize
256KB

Download
memory/1716-101-0x00000000023C0000-0x00000000023DA000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads