asyncrat | 43746064f43725609aa0226cdedf1e10658a68606c7310724b14f90ad2c3572a

General

Target

Stage14_88.exe
Size

63KB
MD5

0d4c64009163155f2688eab5a1d040f0
SHA1

9a40ccd971bb5e2535c81beaf3cd2323c67d9333
SHA256

a6e3fb8559f84b97a1b29229dd2dfb5142186542d193f7e7560e3c410e8e320c
SHA512

0830a6f4a86637209808e1543c55aca8f4830f021254f269db6a788f6e297ffec743f14ca3280aeebca99f7e1c8c3e279f5818e152e3047508bb43f1857a8cc5
SSDEEP

1536:MJInX1VosLNPMSfjT9DC6DspzSPrUbbkwDkGnrpqKmY7:MJInX1VosLNPjjxDnIp0UbbkC4z

Score

10^/10

asyncrat venom clients rat

Malware Config

Extracted

Family

asyncrat

Version

5.0.5

Botnet

Venom Clients

C2

127.0.0.1:4449

192.168.50.96:4449

Mutex

FHA=24781

Attributes

delay
1
install
true
install_file
WD.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/0x00080000000120fe-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
1960	WD.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
2820	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
3068	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1760	Stage14_88.exe
1760	Stage14_88.exe
1760	Stage14_88.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1760	Stage14_88.exe
Token: SeDebugPrivilege	1960	WD.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1760 wrote to memory of 2152	1760	Stage14_88.exe	30
PID 1760 wrote to memory of 2152	1760	Stage14_88.exe	30
PID 1760 wrote to memory of 2152	1760	Stage14_88.exe	30
PID 1760 wrote to memory of 2940	1760	Stage14_88.exe	32
PID 1760 wrote to memory of 2940	1760	Stage14_88.exe	32
PID 1760 wrote to memory of 2940	1760	Stage14_88.exe	32
PID 2940 wrote to memory of 2820	2940	cmd.exe	34
PID 2940 wrote to memory of 2820	2940	cmd.exe	34
PID 2940 wrote to memory of 2820	2940	cmd.exe	34
PID 2152 wrote to memory of 3068	2152	cmd.exe	35
PID 2152 wrote to memory of 3068	2152	cmd.exe	35
PID 2152 wrote to memory of 3068	2152	cmd.exe	35
PID 2940 wrote to memory of 1960	2940	cmd.exe	36
PID 2940 wrote to memory of 1960	2940	cmd.exe	36
PID 2940 wrote to memory of 1960	2940	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\Stage14_88.exe
"C:\Users\Admin\AppData\Local\Temp\Stage14_88.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1760
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WD" /tr '"C:\Users\Admin\AppData\Roaming\WD.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2152
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "WD" /tr '"C:\Users\Admin\AppData\Roaming\WD.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3068
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpBD95.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2940
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2820
- - C:\Users\Admin\AppData\Roaming\WD.exe
    "C:\Users\Admin\AppData\Roaming\WD.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1960

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\tmpBD95.tmp.bat

Filesize
146B

MD5
4904ec2ad264817efcc58e75a8ee4910

SHA1
383d67726a2367f5e425eb24b35e2a603796629b

SHA256
cd917db27a9fc9d74de3fbce225086ce77047a80d9e7ef58be4df2edd00776d3

SHA512
25f983ab8111448212da04af22d67b363e5e17f5d0fdb2f4f109c1b6b3d7fe0fac39f830096316f03cb831874a315163891267275464f9e88d588b89c116b2b7

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

Filesize
63KB

MD5
0d4c64009163155f2688eab5a1d040f0

SHA1
9a40ccd971bb5e2535c81beaf3cd2323c67d9333

SHA256
a6e3fb8559f84b97a1b29229dd2dfb5142186542d193f7e7560e3c410e8e320c

SHA512
0830a6f4a86637209808e1543c55aca8f4830f021254f269db6a788f6e297ffec743f14ca3280aeebca99f7e1c8c3e279f5818e152e3047508bb43f1857a8cc5

Download Submit
memory/1760-0-0x000007FEF5EA3000-0x000007FEF5EA4000-memory.dmp

Filesize
4KB

Download
memory/1760-1-0x00000000009C0000-0x00000000009D6000-memory.dmp

Filesize
88KB

Download
memory/1760-2-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/1760-3-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/1760-12-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/1960-17-0x0000000001330000-0x0000000001346000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads