asyncrat | 96b2d78904d08e5deeb0aa2b82e1630e7d190e85cddb807a539b1b4c8126ba70

Analysis

max time kernel
147s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20230221-en
resource tags

arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-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 3 IoCs

rat

resource	yara_rule
behavioral2/memory/4152-133-0x0000000000330000-0x0000000000342000-memory.dmp	asyncrat
behavioral2/files/0x0007000000023168-144.dat	asyncrat
behavioral2/files/0x0007000000023168-143.dat	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-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation	chromedrivers.exe

Executes dropped EXE 1 IoCs

pid	Process
448	chromedrivers.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
4288	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1404	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe
4152	chromedrivers.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4152	chromedrivers.exe
Token: SeDebugPrivilege	448	chromedrivers.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4152 wrote to memory of 3728	4152	chromedrivers.exe	90
PID 4152 wrote to memory of 3728	4152	chromedrivers.exe	90
PID 4152 wrote to memory of 3728	4152	chromedrivers.exe	90
PID 4152 wrote to memory of 2824	4152	chromedrivers.exe	92
PID 4152 wrote to memory of 2824	4152	chromedrivers.exe	92
PID 4152 wrote to memory of 2824	4152	chromedrivers.exe	92
PID 3728 wrote to memory of 4288	3728	cmd.exe	94
PID 3728 wrote to memory of 4288	3728	cmd.exe	94
PID 3728 wrote to memory of 4288	3728	cmd.exe	94
PID 2824 wrote to memory of 1404	2824	cmd.exe	95
PID 2824 wrote to memory of 1404	2824	cmd.exe	95
PID 2824 wrote to memory of 1404	2824	cmd.exe	95
PID 2824 wrote to memory of 448	2824	cmd.exe	97
PID 2824 wrote to memory of 448	2824	cmd.exe	97
PID 2824 wrote to memory of 448	2824	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\chromedrivers.exe
"C:\Users\Admin\AppData\Local\Temp\chromedrivers.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4152
- 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:3728
- - 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:4288
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp85AF.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2824
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1404
- - C:\Users\Admin\AppData\Roaming\chromedrivers.exe
    "C:\Users\Admin\AppData\Roaming\chromedrivers.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:448

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

chromedrivers.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\chromedrivers.exe.log
Size 614B
SHA256 9ed5449a36700939987209c7a2974b9cc669b8b22c7c4e7936f35dda0a4dc359
MD5 54920f388010333559bdff225040761d
SHA1 040972bf1fc83014f10c45832322c094f883ce30
SHA512 e17aa5d1328b3bfd3754d15b3c2eded98653d90c7b326f941522e0b3bd6f557880246a6bc69047facb42eb97d2e0ed6c46148dfe95a98669fc4e1d07c21a285c
MD5 SHA1 SHA512

Submit Download

tmp85AF.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp85AF.tmp.bat
Size 157B
SHA256 4330ef69312a04311158c6b55c262dde4e4fbdc919725288142a621c4074b16b
MD5 fbf522cebe307ca884955233ef44cb26
SHA1 57cd5e1900d38ab821c27d486a55bc8a1046746a
SHA512 6f904f25d19e59f76c9470e98507061d6fee7fcac1643944e15a096bc8abc3c0a577c550414b860b00c7cc76e3aed3fe528e61518ba30fa5e9c68dbcdcb2685d
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

memory/448-146-0x0000000005810000-0x0000000005820000-memory.dmp

Download

memory/448-147-0x0000000005810000-0x0000000005820000-memory.dmp

Download

memory/4152-133-0x0000000000330000-0x0000000000342000-memory.dmp

Download

memory/4152-134-0x0000000004CF0000-0x0000000004D00000-memory.dmp

Download

memory/4152-135-0x0000000004D80000-0x0000000004DE6000-memory.dmp

Download

memory/4152-136-0x0000000005210000-0x00000000052AC000-memory.dmp

Download