asyncrat | 6a93f241b22b9784403998ec187fcf75ae9dd830aa834b7698052165ef225ec0

General

Target

now.exe
Size

63KB
MD5

742a8c6a17671e7db3e4fa1c15534fb1
SHA1

5f6e4b10c34e512cd1110b6c67b0722d00d5a34d
SHA256

6a93f241b22b9784403998ec187fcf75ae9dd830aa834b7698052165ef225ec0
SHA512

315a99105682595fd8366c3e237e57a187a4902bcf49894a35aa3d5a0cde32d26168a530dc9d9b8d00d27debf2be6f6eadcd1b17ce86c53a1d80c5a711f3d442
SSDEEP

1536:DZmttUdjLAQBae5Q5uEPGbbQwTPVbGBi/J6GVZVclN:DZmttUdjvBF5Qw2GbbQ6dzY

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

127.0.0.1:8848

127.0.0.1:64431

fojeweb571-64431.portmap.host:8848

fojeweb571-64431.portmap.host:64431

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
install
true
install_file
windows defender firewall.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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x001a00000002ab87-10.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2568	windows defender firewall.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
3392	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
1340	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
928	now.exe
928	now.exe
928	now.exe
928	now.exe
928	now.exe
928	now.exe
928	now.exe
928	now.exe
928	now.exe
928	now.exe
928	now.exe
928	now.exe
928	now.exe
928	now.exe
928	now.exe
928	now.exe
928	now.exe
928	now.exe
928	now.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	928	now.exe
Token: SeDebugPrivilege	2568	windows defender firewall.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 928 wrote to memory of 3088	928	now.exe	78
PID 928 wrote to memory of 3088	928	now.exe	78
PID 928 wrote to memory of 4508	928	now.exe	80
PID 928 wrote to memory of 4508	928	now.exe	80
PID 4508 wrote to memory of 3392	4508	cmd.exe	82
PID 4508 wrote to memory of 3392	4508	cmd.exe	82
PID 3088 wrote to memory of 1340	3088	cmd.exe	83
PID 3088 wrote to memory of 1340	3088	cmd.exe	83
PID 4508 wrote to memory of 2568	4508	cmd.exe	84
PID 4508 wrote to memory of 2568	4508	cmd.exe	84

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\now.exe
"C:\Users\Admin\AppData\Local\Temp\now.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:928
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3088
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1340
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp762A.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4508
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3392
- - C:\Users\Admin\AppData\Roaming\windows defender firewall.exe
    "C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2568

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\tmp762A.tmp.bat

Filesize
169B

MD5
beb0effdd0c3732ef76c8a4d194de806

SHA1
3599c3a3b88343280c638558f68a263f47fe7a58

SHA256
c9a52dca809a9802551515534b211fb6e96587e9aa5255b887e7a4d445cbe405

SHA512
4a66974b668ee9b29119e2b1fc3a45bd4aeb0164045fdeaba527355fa64a474a00cf45b1dc8168e13978657c46007a22aa94ab068efcacb886ea112d00a324a8

Download Submit
C:\Users\Admin\AppData\Roaming\windows defender firewall.exe

Filesize
63KB

MD5
742a8c6a17671e7db3e4fa1c15534fb1

SHA1
5f6e4b10c34e512cd1110b6c67b0722d00d5a34d

SHA256
6a93f241b22b9784403998ec187fcf75ae9dd830aa834b7698052165ef225ec0

SHA512
315a99105682595fd8366c3e237e57a187a4902bcf49894a35aa3d5a0cde32d26168a530dc9d9b8d00d27debf2be6f6eadcd1b17ce86c53a1d80c5a711f3d442

Download Submit
memory/928-1-0x0000000000630000-0x0000000000646000-memory.dmp

Filesize
88KB

Download
memory/928-0-0x00007FFFCB093000-0x00007FFFCB095000-memory.dmp

Filesize
8KB

Download
memory/928-2-0x00007FFFCB090000-0x00007FFFCBB52000-memory.dmp

Filesize
10.8MB

Download
memory/928-3-0x00007FFFCB090000-0x00007FFFCBB52000-memory.dmp

Filesize
10.8MB

Download
memory/928-8-0x00007FFFCB090000-0x00007FFFCBB52000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads