asyncrat | 17dc116cfe82c641868c8df6de4e3ad67873686030833e1517d82954a806ef1e

General

Target

Client.exe
Size

47KB
MD5

8021ff369474ace0a0db381a89fb4a1b
SHA1

1e4413527f5f4928fb650fd205cb47b2f26cc334
SHA256

17dc116cfe82c641868c8df6de4e3ad67873686030833e1517d82954a806ef1e
SHA512

a755327bf4158c203ca2160088a3bf12c19b91eac8133fec6f4f5a164acf4acecb9247d8de11bc6eb0226e10f658d004b41dd287e5da9c3e9c28141c89a7d255
SSDEEP

768:oZztILg+kM+bihtelDSN+iV08YbygeqXJSZvEgK/JXZVc6KN:oZP0htKDs4zb11IZnkJXZVclN

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

127.0.0.1:8848

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
install
true
install_file
Wave-Setup.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
behavioral2/files/0x000a000000023c8a-10.dat	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	Client.exe

Executes dropped EXE 1 IoCs

pid	Process
5092	Wave-Setup.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

defense_evasion

pid	Process
4004	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
3652	schtasks.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe
2940	Client.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2940	Client.exe
Token: SeDebugPrivilege	5092	Wave-Setup.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2940 wrote to memory of 780	2940	Client.exe	87
PID 2940 wrote to memory of 780	2940	Client.exe	87
PID 2940 wrote to memory of 3180	2940	Client.exe	89
PID 2940 wrote to memory of 3180	2940	Client.exe	89
PID 3180 wrote to memory of 4004	3180	cmd.exe	91
PID 3180 wrote to memory of 4004	3180	cmd.exe	91
PID 780 wrote to memory of 3652	780	cmd.exe	92
PID 780 wrote to memory of 3652	780	cmd.exe	92
PID 3180 wrote to memory of 5092	3180	cmd.exe	93
PID 3180 wrote to memory of 5092	3180	cmd.exe	93

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\Client.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2940
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Wave-Setup" /tr '"C:\Users\Admin\AppData\Roaming\Wave-Setup.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:780
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Wave-Setup" /tr '"C:\Users\Admin\AppData\Roaming\Wave-Setup.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3652
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpBB80.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3180
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4004
- - C:\Users\Admin\AppData\Roaming\Wave-Setup.exe
    "C:\Users\Admin\AppData\Roaming\Wave-Setup.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:5092

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpBB80.tmp.bat

Filesize
154B

MD5
65513446096a2d4d0d5c1ffa6bd62c96

SHA1
9b3ee401c33e2dfce179206c264790bd36b4dc8b

SHA256
768ce53aa762817ffce7dcf528a28225501098708809d3328bb1636f4867e52f

SHA512
f59810408f640e613e2d937d81aaf0540dddfe857b11e486be2caa8e493c8c8f20c4ef07845df6183b7be76e7888b146dbf1b1ec29046461430a29a95dca27e3

Download Submit
C:\Users\Admin\AppData\Roaming\Wave-Setup.exe

Filesize
47KB

MD5
8021ff369474ace0a0db381a89fb4a1b

SHA1
1e4413527f5f4928fb650fd205cb47b2f26cc334

SHA256
17dc116cfe82c641868c8df6de4e3ad67873686030833e1517d82954a806ef1e

SHA512
a755327bf4158c203ca2160088a3bf12c19b91eac8133fec6f4f5a164acf4acecb9247d8de11bc6eb0226e10f658d004b41dd287e5da9c3e9c28141c89a7d255

Download Submit
memory/2940-0-0x00007FF9DC8D3000-0x00007FF9DC8D5000-memory.dmp

Filesize
8KB

Download
memory/2940-1-0x00000000000B0000-0x00000000000C2000-memory.dmp

Filesize
72KB

Download
memory/2940-2-0x00007FF9DC8D0000-0x00007FF9DD391000-memory.dmp

Filesize
10.8MB

Download
memory/2940-7-0x00007FF9DC8D0000-0x00007FF9DD391000-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