asyncrat | cef5f8243d475962e0f5c18b9461146e6ee0a8261c11b0682251ddc790e7dd3b

General

Target

Client.exe
Size

63KB
MD5

a5764fe6f0b7af285c0187bd37046c6b
SHA1

4f713d87a6bc6806997b9c5189f8b399e3de860d
SHA256

cef5f8243d475962e0f5c18b9461146e6ee0a8261c11b0682251ddc790e7dd3b
SHA512

39627e91dcb407e560d16b20391eedde240370eac3c166d22fc76ac9818909c072cf3aca15f43679b98033a8513fa26b1630e8adca9a414ec185417f2bd72c30
SSDEEP

1536:7hpJL7VQky47k8NmceiHFGbbXwXHXaC7yzGbtpqKmY7:7hpJL7VQky4nNJeoGbbX8R2Y2z

Score

10^/10

asyncrat chuwawa rat

Malware Config

Extracted

Family

asyncrat

Version

ChuWaWa 5.2

Botnet

ChuWaWa

C2

stores-less.gl.at.ply.gg:45080

Mutex

ChuWaWaRatMutex_penka

Attributes

delay
1
install
true
install_file
213.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/0x000800000001abef-12.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
4744	213.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
4884	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
2400	schtasks.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
600	Client.exe
600	Client.exe
600	Client.exe
600	Client.exe
600	Client.exe
600	Client.exe
600	Client.exe
600	Client.exe
600	Client.exe
600	Client.exe
600	Client.exe
600	Client.exe
600	Client.exe
600	Client.exe
600	Client.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	600	Client.exe
Token: SeDebugPrivilege	600	Client.exe
Token: SeDebugPrivilege	4744	213.exe
Token: SeDebugPrivilege	4744	213.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 600 wrote to memory of 3556	600	Client.exe	73
PID 600 wrote to memory of 3556	600	Client.exe	73
PID 600 wrote to memory of 344	600	Client.exe	75
PID 600 wrote to memory of 344	600	Client.exe	75
PID 344 wrote to memory of 4884	344	cmd.exe	77
PID 344 wrote to memory of 4884	344	cmd.exe	77
PID 3556 wrote to memory of 2400	3556	cmd.exe	78
PID 3556 wrote to memory of 2400	3556	cmd.exe	78
PID 344 wrote to memory of 4744	344	cmd.exe	79
PID 344 wrote to memory of 4744	344	cmd.exe	79

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⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:600
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "213" /tr '"C:\Users\Admin\AppData\Roaming\213.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3556
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "213" /tr '"C:\Users\Admin\AppData\Roaming\213.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2400
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7791.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:344
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4884
- - C:\Users\Admin\AppData\Roaming\213.exe
    "C:\Users\Admin\AppData\Roaming\213.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4744

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp7791.tmp.bat

Filesize
147B

MD5
3d06d0ece45fe01485266b1245f4b2ac

SHA1
d2b96e76d097ab57ef39fe1688fab7f2b4fa7d99

SHA256
e6269866d82ac84ea5030a99d9f5ded8313201715f5720a8219a4deadcdfef9d

SHA512
dc0ec7afefe45c09aa1ac247c8d5573a1428a00badd1b8421b462043f91f6788af5f0d4ab374fdbaaeebda6c401d057fa88d8bcd69e2cd68bc4d3dfc86ccb3d8

Download Submit
C:\Users\Admin\AppData\Roaming\213.exe

Filesize
63KB

MD5
a5764fe6f0b7af285c0187bd37046c6b

SHA1
4f713d87a6bc6806997b9c5189f8b399e3de860d

SHA256
cef5f8243d475962e0f5c18b9461146e6ee0a8261c11b0682251ddc790e7dd3b

SHA512
39627e91dcb407e560d16b20391eedde240370eac3c166d22fc76ac9818909c072cf3aca15f43679b98033a8513fa26b1630e8adca9a414ec185417f2bd72c30

Download Submit
memory/600-0-0x0000017D19910000-0x0000017D19926000-memory.dmp

Filesize
88KB

Download
memory/600-1-0x00007FF80FF60000-0x00007FF81013B000-memory.dmp

Filesize
1.9MB

Download
memory/600-2-0x00007FF80FF60000-0x00007FF81013B000-memory.dmp

Filesize
1.9MB

Download
memory/600-3-0x00007FF80FF60000-0x00007FF81013B000-memory.dmp

Filesize
1.9MB

Download
memory/600-8-0x00007FF80FF60000-0x00007FF81013B000-memory.dmp

Filesize
1.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads