asyncrat | 109c3b63306fcc197268155a8f45681e14987eb207d4b8eef74978cf5a4114e6

General

Target

109c3b63306fcc197268155a8f45681e14987eb207d4b8eef74978cf5a4114e6N.exe
Size

63KB
MD5

6c7adc2f28f40d79c09fdd2d59a94ab0
SHA1

48c3f3223376146c61a00c948447c188147c5dae
SHA256

109c3b63306fcc197268155a8f45681e14987eb207d4b8eef74978cf5a4114e6
SHA512

d3db6d8ec0835540299c0faf35d87327090d36b6fa3fd14fc26a452bdb7c084093d2424238ee0e2b847d07c33cb871f7cf5cd428226b08e1fc317ed88259a4a6
SSDEEP

1536:YhahLzRQA+dsHbp0G8QOjeUJyq8wJGbbqwXGazpqKmY7:YhahLzRQA+dsHbp0AOjeUw8Gbbqwwz

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

31.57.135.113:4199

Mutex

w5g64wefd5w4ef

Attributes

delay
1
install
true
install_file
dllhost.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/0x000d000000014348-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2744	dllhost.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
2124	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
2360	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1380	109c3b63306fcc197268155a8f45681e14987eb207d4b8eef74978cf5a4114e6N.exe
1380	109c3b63306fcc197268155a8f45681e14987eb207d4b8eef74978cf5a4114e6N.exe
1380	109c3b63306fcc197268155a8f45681e14987eb207d4b8eef74978cf5a4114e6N.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1380	109c3b63306fcc197268155a8f45681e14987eb207d4b8eef74978cf5a4114e6N.exe
Token: SeDebugPrivilege	2744	dllhost.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1380 wrote to memory of 328	1380	109c3b63306fcc197268155a8f45681e14987eb207d4b8eef74978cf5a4114e6N.exe	30
PID 1380 wrote to memory of 328	1380	109c3b63306fcc197268155a8f45681e14987eb207d4b8eef74978cf5a4114e6N.exe	30
PID 1380 wrote to memory of 328	1380	109c3b63306fcc197268155a8f45681e14987eb207d4b8eef74978cf5a4114e6N.exe	30
PID 1380 wrote to memory of 2680	1380	109c3b63306fcc197268155a8f45681e14987eb207d4b8eef74978cf5a4114e6N.exe	32
PID 1380 wrote to memory of 2680	1380	109c3b63306fcc197268155a8f45681e14987eb207d4b8eef74978cf5a4114e6N.exe	32
PID 1380 wrote to memory of 2680	1380	109c3b63306fcc197268155a8f45681e14987eb207d4b8eef74978cf5a4114e6N.exe	32
PID 328 wrote to memory of 2360	328	cmd.exe	34
PID 328 wrote to memory of 2360	328	cmd.exe	34
PID 328 wrote to memory of 2360	328	cmd.exe	34
PID 2680 wrote to memory of 2124	2680	cmd.exe	35
PID 2680 wrote to memory of 2124	2680	cmd.exe	35
PID 2680 wrote to memory of 2124	2680	cmd.exe	35
PID 2680 wrote to memory of 2744	2680	cmd.exe	36
PID 2680 wrote to memory of 2744	2680	cmd.exe	36
PID 2680 wrote to memory of 2744	2680	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\109c3b63306fcc197268155a8f45681e14987eb207d4b8eef74978cf5a4114e6N.exe
"C:\Users\Admin\AppData\Local\Temp\109c3b63306fcc197268155a8f45681e14987eb207d4b8eef74978cf5a4114e6N.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1380
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "dllhost" /tr '"C:\Users\Admin\AppData\Roaming\dllhost.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:328
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "dllhost" /tr '"C:\Users\Admin\AppData\Roaming\dllhost.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2360
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpB8B5.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2680
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2124
- - C:\Users\Admin\AppData\Roaming\dllhost.exe
    "C:\Users\Admin\AppData\Roaming\dllhost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2744

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\CabD1B3.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpB8B5.tmp.bat

Filesize
151B

MD5
4c7472dedcba2523e99303567b596185

SHA1
0c752556ff4fb96e89288da91b0d207555d8a92a

SHA256
4cdc94245824d532570272506a71844644c63286b45999495e7cdd3f00110b5d

SHA512
d84da3309f7a6203784bae10b9379a2a3410867c77876d36545eb42d9f02246dc54cc95040c85085223cca681d237db8c6279817aac41f7ab17e90fed86c9b78

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

Filesize
63KB

MD5
6c7adc2f28f40d79c09fdd2d59a94ab0

SHA1
48c3f3223376146c61a00c948447c188147c5dae

SHA256
109c3b63306fcc197268155a8f45681e14987eb207d4b8eef74978cf5a4114e6

SHA512
d3db6d8ec0835540299c0faf35d87327090d36b6fa3fd14fc26a452bdb7c084093d2424238ee0e2b847d07c33cb871f7cf5cd428226b08e1fc317ed88259a4a6

Download Submit
memory/1380-0-0x000007FEF5EA3000-0x000007FEF5EA4000-memory.dmp

Filesize
4KB

Download
memory/1380-1-0x0000000000250000-0x0000000000266000-memory.dmp

Filesize
88KB

Download
memory/1380-2-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/1380-3-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/1380-12-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/2744-17-0x00000000010A0000-0x00000000010B6000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads