asyncrat | 96b2d78904d08e5deeb0aa2b82e1630e7d190e85cddb807a539b1b4c8126ba70

Analysis

max time kernel
143s
max time network
150s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
14/03/2023, 19:11

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
chromedrivers.exe
Size 47KB
Sample230314-xvxmmsbc2x
SHA256 96b2d78904d08e5deeb0aa2b82e1630e7d190e85cddb807a539b1b4c8126ba70
MD5 19bad7e44cebbc89e4fdbf0331f8537e
SHA1 3a0d1a2c7b6c282a41be338e2487a76a80b0af30
SHA512 4628e07bf34d097d646b320e2b3336e46f6ae38750e9187560e85e9db66f157d3d2de3421ee75013fbe9075dc600c9f599611cd46a4ace2c234bb5d5a948bc33
SSDEEP 768:iuW81Towx/9WU9Vt+Xmo2qzEZQJSVHDEzPII72IxqKm2L0bt7GCv5wFdjhjwJ55S:iuW81Toq7C2ruRcE2Ixwzbt7Gkqjhjw0
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

dnsontopnegros.ddns.net:13370

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
chromedrivers.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 6 IoCs

rat

resource	yara_rule
behavioral1/memory/748-54-0x0000000001080000-0x0000000001092000-memory.dmp	asyncrat
behavioral1/files/0x000b000000012305-66.dat	asyncrat
behavioral1/files/0x000b000000012305-65.dat	asyncrat
behavioral1/files/0x000b000000012305-67.dat	asyncrat
behavioral1/memory/1744-68-0x0000000000D00000-0x0000000000D12000-memory.dmp	asyncrat
behavioral1/memory/1744-69-0x0000000004D10000-0x0000000004D50000-memory.dmp	asyncrat

Executes dropped EXE 1 IoCs

pid	Process
1744	chromedrivers.exe

Loads dropped DLL 1 IoCs

pid	Process
240	cmd.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
904	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
828	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
748	chromedrivers.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	748	chromedrivers.exe
Token: SeDebugPrivilege	1744	chromedrivers.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 748 wrote to memory of 1472	748	chromedrivers.exe	27
PID 748 wrote to memory of 1472	748	chromedrivers.exe	27
PID 748 wrote to memory of 1472	748	chromedrivers.exe	27
PID 748 wrote to memory of 1472	748	chromedrivers.exe	27
PID 748 wrote to memory of 240	748	chromedrivers.exe	29
PID 748 wrote to memory of 240	748	chromedrivers.exe	29
PID 748 wrote to memory of 240	748	chromedrivers.exe	29
PID 748 wrote to memory of 240	748	chromedrivers.exe	29
PID 1472 wrote to memory of 904	1472	cmd.exe	31
PID 1472 wrote to memory of 904	1472	cmd.exe	31
PID 1472 wrote to memory of 904	1472	cmd.exe	31
PID 1472 wrote to memory of 904	1472	cmd.exe	31
PID 240 wrote to memory of 828	240	cmd.exe	32
PID 240 wrote to memory of 828	240	cmd.exe	32
PID 240 wrote to memory of 828	240	cmd.exe	32
PID 240 wrote to memory of 828	240	cmd.exe	32
PID 240 wrote to memory of 1744	240	cmd.exe	33
PID 240 wrote to memory of 1744	240	cmd.exe	33
PID 240 wrote to memory of 1744	240	cmd.exe	33
PID 240 wrote to memory of 1744	240	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\chromedrivers.exe
"C:\Users\Admin\AppData\Local\Temp\chromedrivers.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:748
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "chromedrivers" /tr '"C:\Users\Admin\AppData\Roaming\chromedrivers.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1472
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "chromedrivers" /tr '"C:\Users\Admin\AppData\Roaming\chromedrivers.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:904
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp79B3.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:240
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:828
- - C:\Users\Admin\AppData\Roaming\chromedrivers.exe
    "C:\Users\Admin\AppData\Roaming\chromedrivers.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1744

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

tmp79B3.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp79B3.tmp.bat
Size 157B
SHA256 f4e46a26a9f82ac85a5ae2472a4b804d70af9265a6e3ad94b7628762eddd2201
MD5 e824357297c384af801f8f4d5999903d
SHA1 16cd8c14fe978d00c9d8e8b92119a4fc0363bc6f
SHA512 fa170057f1f2cd1938c6515cdb3a1dcca59c7df7fcf61052add6ad6522560f71c7cd16c8fee957021a4273b64f3d60695b44c93ceb6ac3f2ff908d48b19abc5c
MD5 SHA1 SHA512

Submit Download

tmp79B3.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp79B3.tmp.bat
Size 157B
SHA256 f4e46a26a9f82ac85a5ae2472a4b804d70af9265a6e3ad94b7628762eddd2201
MD5 e824357297c384af801f8f4d5999903d
SHA1 16cd8c14fe978d00c9d8e8b92119a4fc0363bc6f
SHA512 fa170057f1f2cd1938c6515cdb3a1dcca59c7df7fcf61052add6ad6522560f71c7cd16c8fee957021a4273b64f3d60695b44c93ceb6ac3f2ff908d48b19abc5c
MD5 SHA1 SHA512

Submit Download

chromedrivers.exe

Path C:\Users\Admin\AppData\Roaming\chromedrivers.exe
Size 47KB
SHA256 96b2d78904d08e5deeb0aa2b82e1630e7d190e85cddb807a539b1b4c8126ba70
MD5 19bad7e44cebbc89e4fdbf0331f8537e
SHA1 3a0d1a2c7b6c282a41be338e2487a76a80b0af30
SHA512 4628e07bf34d097d646b320e2b3336e46f6ae38750e9187560e85e9db66f157d3d2de3421ee75013fbe9075dc600c9f599611cd46a4ace2c234bb5d5a948bc33
SSDEEP 768:iuW81Towx/9WU9Vt+Xmo2qzEZQJSVHDEzPII72IxqKm2L0bt7GCv5wFdjhjwJ55S:iuW81Toq7C2ruRcE2Ixwzbt7Gkqjhjw0
MD5 SHA1 SHA512 SSDEEP

Submit Download

chromedrivers.exe

Path C:\Users\Admin\AppData\Roaming\chromedrivers.exe
Size 47KB
SHA256 96b2d78904d08e5deeb0aa2b82e1630e7d190e85cddb807a539b1b4c8126ba70
MD5 19bad7e44cebbc89e4fdbf0331f8537e
SHA1 3a0d1a2c7b6c282a41be338e2487a76a80b0af30
SHA512 4628e07bf34d097d646b320e2b3336e46f6ae38750e9187560e85e9db66f157d3d2de3421ee75013fbe9075dc600c9f599611cd46a4ace2c234bb5d5a948bc33
SSDEEP 768:iuW81Towx/9WU9Vt+Xmo2qzEZQJSVHDEzPII72IxqKm2L0bt7GCv5wFdjhjwJ55S:iuW81Toq7C2ruRcE2Ixwzbt7Gkqjhjw0
MD5 SHA1 SHA512 SSDEEP

Submit Download

chromedrivers.exe

Path \Users\Admin\AppData\Roaming\chromedrivers.exe
Size 47KB
SHA256 96b2d78904d08e5deeb0aa2b82e1630e7d190e85cddb807a539b1b4c8126ba70
MD5 19bad7e44cebbc89e4fdbf0331f8537e
SHA1 3a0d1a2c7b6c282a41be338e2487a76a80b0af30
SHA512 4628e07bf34d097d646b320e2b3336e46f6ae38750e9187560e85e9db66f157d3d2de3421ee75013fbe9075dc600c9f599611cd46a4ace2c234bb5d5a948bc33
SSDEEP 768:iuW81Towx/9WU9Vt+Xmo2qzEZQJSVHDEzPII72IxqKm2L0bt7GCv5wFdjhjwJ55S:iuW81Toq7C2ruRcE2Ixwzbt7Gkqjhjw0
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/748-54-0x0000000001080000-0x0000000001092000-memory.dmp

Download

memory/748-55-0x0000000004D80000-0x0000000004DC0000-memory.dmp

Download

memory/1744-68-0x0000000000D00000-0x0000000000D12000-memory.dmp

Download

memory/1744-69-0x0000000004D10000-0x0000000004D50000-memory.dmp

Download

memory/1744-70-0x0000000004D10000-0x0000000004D50000-memory.dmp

Download