asyncrat | 9a2bf745baf56c027d7e4d52cc7c41cc7b2748d634677384fc2d9eecdb8f7485

Analysis

max time kernel
129s
max time network
142s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
19-04-2023 14:45

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General

Target

XWorm-Rat-Remote-Administration-Tool--main/XWormUI.exe
Size

49KB
MD5

9b64d05f82ebaa3e51a79c1beeed2181
SHA1

28b89cd9f181c41586b06f3e3c1f90e2270781ef
SHA256

93c7fd938042af85f3d429c387b04952f4b97832857fbf0156ae82e4f516fcf8
SHA512

580bc63ec3e6993099deae7e103f8565b42cce3288d78186f9dabea3d8e5c2e6816e1b20439fafd5b94ff24cbaa3eba1154cb995692b3674d5c5c63b6c1dfc13
SSDEEP

768:xuQSNTvEEaBrWUXQd5mo2qmiVzKSPCiPIxUjbHgX3iRudoy8FEY+YBDZSxDlD:xuQSNT8542xW6x0bAXSox8deDlD

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

37.18.62.18:8060

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
ChromeUpdate.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

Processes:

resource	yara_rule
behavioral23/memory/1748-54-0x00000000002A0000-0x00000000002B2000-memory.dmp	asyncrat
\Users\Admin\AppData\Roaming\ChromeUpdate.exe	asyncrat
C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe	asyncrat
C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe	asyncrat
behavioral23/memory/1820-68-0x0000000000120000-0x0000000000132000-memory.dmp	asyncrat
behavioral23/memory/1820-69-0x0000000004E80000-0x0000000004EC0000-memory.dmp	asyncrat

Executes dropped EXE 1 IoCs

Processes:

ChromeUpdate.exe

pid process

1820 ChromeUpdate.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

304 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

Processes:

schtasks.exe

pid process

764 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

524 timeout.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

XWormUI.exe

pid process

1748 XWormUI.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

XWormUI.exeChromeUpdate.exe

description pid process

Token: SeDebugPrivilege 1748 XWormUI.exe
Token: SeDebugPrivilege 1820 ChromeUpdate.exe

pid	process
1820	ChromeUpdate.exe

pid	process
304	cmd.exe

pid	process
764	schtasks.exe

pid	process
524	timeout.exe

pid	process
1748	XWormUI.exe

description	pid	process
Token: SeDebugPrivilege	1748	XWormUI.exe
Token: SeDebugPrivilege	1820	ChromeUpdate.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

XWormUI.execmd.execmd.exe

description	pid	process	target process
PID 1748 wrote to memory of 1496	1748	XWormUI.exe	cmd.exe
PID 1748 wrote to memory of 1496	1748	XWormUI.exe	cmd.exe
PID 1748 wrote to memory of 1496	1748	XWormUI.exe	cmd.exe
PID 1748 wrote to memory of 1496	1748	XWormUI.exe	cmd.exe
PID 1748 wrote to memory of 304	1748	XWormUI.exe	cmd.exe
PID 1748 wrote to memory of 304	1748	XWormUI.exe	cmd.exe
PID 1748 wrote to memory of 304	1748	XWormUI.exe	cmd.exe
PID 1748 wrote to memory of 304	1748	XWormUI.exe	cmd.exe
PID 1496 wrote to memory of 764	1496	cmd.exe	schtasks.exe
PID 1496 wrote to memory of 764	1496	cmd.exe	schtasks.exe
PID 1496 wrote to memory of 764	1496	cmd.exe	schtasks.exe
PID 1496 wrote to memory of 764	1496	cmd.exe	schtasks.exe
PID 304 wrote to memory of 524	304	cmd.exe	timeout.exe
PID 304 wrote to memory of 524	304	cmd.exe	timeout.exe
PID 304 wrote to memory of 524	304	cmd.exe	timeout.exe
PID 304 wrote to memory of 524	304	cmd.exe	timeout.exe
PID 304 wrote to memory of 1820	304	cmd.exe	ChromeUpdate.exe
PID 304 wrote to memory of 1820	304	cmd.exe	ChromeUpdate.exe
PID 304 wrote to memory of 1820	304	cmd.exe	ChromeUpdate.exe
PID 304 wrote to memory of 1820	304	cmd.exe	ChromeUpdate.exe
PID 304 wrote to memory of 1820	304	cmd.exe	ChromeUpdate.exe
PID 304 wrote to memory of 1820	304	cmd.exe	ChromeUpdate.exe
PID 304 wrote to memory of 1820	304	cmd.exe	ChromeUpdate.exe

C:\Users\Admin\AppData\Local\Temp\XWorm-Rat-Remote-Administration-Tool--main\XWormUI.exe
"C:\Users\Admin\AppData\Local\Temp\XWorm-Rat-Remote-Administration-Tool--main\XWormUI.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1748

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ChromeUpdate" /tr '"C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:1496

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "ChromeUpdate" /tr '"C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe"'
3⤵
- Creates scheduled task(s)
PID:764

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp2924.tmp.bat""
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:304

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:524

C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe
"C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1820

Network

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp2924.tmp.bat
Filesize
156B

MD5
989ed820c656350b217255a0fbfbff2d

SHA1
32353cba4fa7b192a5413d24bdc0928642497340

SHA256
cbead317b735aac31ee742179c95abcede0787de131724351dd45bdbd74d6210

SHA512
3c29f9f8268169919c9df03113bd2bd3bb8b9f91eb9d2f350e2a9357b26a31ab1d64c3063b2eb0b42bf0b3d5316d5f582b0a4c400e6f0d714d265b8565a08114

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp2924.tmp.bat
Filesize
156B

MD5
989ed820c656350b217255a0fbfbff2d

SHA1
32353cba4fa7b192a5413d24bdc0928642497340

SHA256
cbead317b735aac31ee742179c95abcede0787de131724351dd45bdbd74d6210

SHA512
3c29f9f8268169919c9df03113bd2bd3bb8b9f91eb9d2f350e2a9357b26a31ab1d64c3063b2eb0b42bf0b3d5316d5f582b0a4c400e6f0d714d265b8565a08114

Download Submit
C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe
Filesize
49KB

MD5
9b64d05f82ebaa3e51a79c1beeed2181

SHA1
28b89cd9f181c41586b06f3e3c1f90e2270781ef

SHA256
93c7fd938042af85f3d429c387b04952f4b97832857fbf0156ae82e4f516fcf8

SHA512
580bc63ec3e6993099deae7e103f8565b42cce3288d78186f9dabea3d8e5c2e6816e1b20439fafd5b94ff24cbaa3eba1154cb995692b3674d5c5c63b6c1dfc13

Download Submit
C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe
Filesize
49KB

MD5
9b64d05f82ebaa3e51a79c1beeed2181

SHA1
28b89cd9f181c41586b06f3e3c1f90e2270781ef

SHA256
93c7fd938042af85f3d429c387b04952f4b97832857fbf0156ae82e4f516fcf8

SHA512
580bc63ec3e6993099deae7e103f8565b42cce3288d78186f9dabea3d8e5c2e6816e1b20439fafd5b94ff24cbaa3eba1154cb995692b3674d5c5c63b6c1dfc13

Download Submit
\Users\Admin\AppData\Roaming\ChromeUpdate.exe
Filesize
49KB

MD5
9b64d05f82ebaa3e51a79c1beeed2181

SHA1
28b89cd9f181c41586b06f3e3c1f90e2270781ef

SHA256
93c7fd938042af85f3d429c387b04952f4b97832857fbf0156ae82e4f516fcf8

SHA512
580bc63ec3e6993099deae7e103f8565b42cce3288d78186f9dabea3d8e5c2e6816e1b20439fafd5b94ff24cbaa3eba1154cb995692b3674d5c5c63b6c1dfc13

Download Submit
memory/1748-54-0x00000000002A0000-0x00000000002B2000-memory.dmp

Filesize
72KB

Download
memory/1748-55-0x0000000004E80000-0x0000000004EC0000-memory.dmp

Filesize
256KB

Download
memory/1820-68-0x0000000000120000-0x0000000000132000-memory.dmp

Filesize
72KB

Download
memory/1820-69-0x0000000004E80000-0x0000000004EC0000-memory.dmp

Filesize
256KB

Download
memory/1820-70-0x0000000004E80000-0x0000000004EC0000-memory.dmp

Filesize
256KB

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