asyncrat | 91a8aec23ab8e79172c8d7cbf6a733e73157941687eb58e8ffa543b7e721b7ea

Analysis

max time kernel
150s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
15-03-2023 03:42

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General

Target

XWorm V3.1 .exe
Size

10.1MB
MD5

320526ae9b5dbd99a38d158578c84ccb
SHA1

60daf13da5fa663c1e7e67ac113fbb5859264b8c
SHA256

91a8aec23ab8e79172c8d7cbf6a733e73157941687eb58e8ffa543b7e721b7ea
SHA512

5c62082634d4abc4bc524b268c5bcf476f6a900cba8becc49e143c8b207f0f661e921a26a62df746236f65a9978b7691e541283835056c9c5a6efac0a382cf0f
SSDEEP

196608:ih0Avmh7fFbZyD3nvCEg+xyZTEQkM1V8/6zCSR6lGCUOGJ1PldRBo+zoDmAYU:iq1pbqdg+yZTUaCkZXOqdbS

Score

10^/10

asyncrat evasion rat themida trojan

Malware Config

Extracted

Family

asyncrat

Version

| Edit 3LOSH RAT

Mutex

AsyncMutex_7SI8OkPnk

Attributes

delay
3
install
true
install_file
ContainerRuntime.exe
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/Kb8rTgY7

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
C:\Users\Admin\AppData\Local\Temp\svchost.exe	asyncrat
C:\Users\Admin\AppData\Local\Temp\svchost.exe	asyncrat
C:\Users\Admin\AppData\Local\Temp\svchost.exe	asyncrat
behavioral2/memory/1248-158-0x0000000000DC0000-0x0000000000DD6000-memory.dmp	asyncrat
C:\Users\Admin\AppData\Roaming\ContainerRuntime.exe	asyncrat
C:\Users\Admin\AppData\Roaming\ContainerRuntime.exe	asyncrat

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

XWorm V3.1 .exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ XWorm V3.1 .exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	XWorm V3.1 .exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

XWorm V3.1 .exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	XWorm V3.1 .exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	XWorm V3.1 .exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

XWorm V3.1 .exesvchost.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	XWorm V3.1 .exe
Key value queried	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	svchost.exe

Executes dropped EXE 3 IoCs

Processes:

XWorm V3.1.exesvchost.exeContainerRuntime.exe

pid process

4220 XWorm V3.1.exe
1248 svchost.exe
4768 ContainerRuntime.exe

pid	process
4220	XWorm V3.1.exe
1248	svchost.exe
4768	ContainerRuntime.exe

Themida packer 3 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral2/memory/1788-136-0x0000000000D00000-0x0000000001C68000-memory.dmp	themida
behavioral2/memory/1788-137-0x0000000000D00000-0x0000000001C68000-memory.dmp	themida
behavioral2/memory/1788-166-0x0000000000D00000-0x0000000001C68000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

XWorm V3.1 .exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA XWorm V3.1 .exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

XWorm V3.1 .exe

pid process

1788 XWorm V3.1 .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

4496 schtasks.exe
Delays execution with timeout.exe 2 IoCs
evasion

Processes:

timeout.exetimeout.exe

pid process

3532 timeout.exe
4596 timeout.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	XWorm V3.1 .exe

pid	process
1788	XWorm V3.1 .exe

pid	process
4496	schtasks.exe

pid	process
3532	timeout.exe
4596	timeout.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

Processes:

svchost.exeContainerRuntime.exe

pid	process
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
1248	svchost.exe
4768	ContainerRuntime.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

XWorm V3.1.exesvchost.exeContainerRuntime.exe

description pid process

Token: SeDebugPrivilege 4220 XWorm V3.1.exe
Token: SeDebugPrivilege 1248 svchost.exe
Token: SeDebugPrivilege 4768 ContainerRuntime.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

ContainerRuntime.exe

pid process

4768 ContainerRuntime.exe

description	pid	process
Token: SeDebugPrivilege	4220	XWorm V3.1.exe
Token: SeDebugPrivilege	1248	svchost.exe
Token: SeDebugPrivilege	4768	ContainerRuntime.exe

pid	process
4768	ContainerRuntime.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

XWorm V3.1 .execmd.exesvchost.execmd.execmd.exe

description	pid	process	target process
PID 1788 wrote to memory of 4220	1788	XWorm V3.1 .exe	XWorm V3.1.exe
PID 1788 wrote to memory of 4220	1788	XWorm V3.1 .exe	XWorm V3.1.exe
PID 1788 wrote to memory of 1248	1788	XWorm V3.1 .exe	svchost.exe
PID 1788 wrote to memory of 1248	1788	XWorm V3.1 .exe	svchost.exe
PID 1788 wrote to memory of 1248	1788	XWorm V3.1 .exe	svchost.exe
PID 1788 wrote to memory of 4884	1788	XWorm V3.1 .exe	cmd.exe
PID 1788 wrote to memory of 4884	1788	XWorm V3.1 .exe	cmd.exe
PID 1788 wrote to memory of 4884	1788	XWorm V3.1 .exe	cmd.exe
PID 4884 wrote to memory of 3532	4884	cmd.exe	timeout.exe
PID 4884 wrote to memory of 3532	4884	cmd.exe	timeout.exe
PID 4884 wrote to memory of 3532	4884	cmd.exe	timeout.exe
PID 1248 wrote to memory of 3928	1248	svchost.exe	cmd.exe
PID 1248 wrote to memory of 3928	1248	svchost.exe	cmd.exe
PID 1248 wrote to memory of 3928	1248	svchost.exe	cmd.exe
PID 1248 wrote to memory of 4612	1248	svchost.exe	cmd.exe
PID 1248 wrote to memory of 4612	1248	svchost.exe	cmd.exe
PID 1248 wrote to memory of 4612	1248	svchost.exe	cmd.exe
PID 4612 wrote to memory of 4596	4612	cmd.exe	timeout.exe
PID 4612 wrote to memory of 4596	4612	cmd.exe	timeout.exe
PID 4612 wrote to memory of 4596	4612	cmd.exe	timeout.exe
PID 3928 wrote to memory of 4496	3928	cmd.exe	schtasks.exe
PID 3928 wrote to memory of 4496	3928	cmd.exe	schtasks.exe
PID 3928 wrote to memory of 4496	3928	cmd.exe	schtasks.exe
PID 4612 wrote to memory of 4768	4612	cmd.exe	ContainerRuntime.exe
PID 4612 wrote to memory of 4768	4612	cmd.exe	ContainerRuntime.exe
PID 4612 wrote to memory of 4768	4612	cmd.exe	ContainerRuntime.exe

C:\Users\Admin\AppData\Local\Temp\XWorm V3.1 .exe
"C:\Users\Admin\AppData\Local\Temp\XWorm V3.1 .exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:1788

C:\Users\Admin\AppData\Local\Temp\XWorm V3.1.exe
"C:\Users\Admin\AppData\Local\Temp\XWorm V3.1.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4220

C:\Users\Admin\AppData\Local\Temp\svchost.exe
"C:\Users\Admin\AppData\Local\Temp\svchost.exe"
2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1248

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ContainerRuntime" /tr '"C:\Users\Admin\AppData\Roaming\ContainerRuntime.exe"' & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:3928

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "ContainerRuntime" /tr '"C:\Users\Admin\AppData\Roaming\ContainerRuntime.exe"'
4⤵
- Creates scheduled task(s)
PID:4496

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpE573.tmp.bat""
3⤵
- Suspicious use of WriteProcessMemory
PID:4612

C:\Windows\SysWOW64\timeout.exe
timeout 3
4⤵
- Delays execution with timeout.exe
PID:4596

C:\Users\Admin\AppData\Roaming\ContainerRuntime.exe
"C:\Users\Admin\AppData\Roaming\ContainerRuntime.exe"
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4768

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCD67.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:4884

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:3532

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

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

T1102

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\XWorm V3.1.exe
Filesize
6.9MB

MD5
37a9fdc56e605d2342da88a6e6182b4b

SHA1
20bc3df33bbbb676d2a3c572cff4c1d58c79055d

SHA256
422ba689937e3748a4b6bd3c5af2dce0211e8a48eb25767e6d1d2192d27f1f58

SHA512
f556805142b77b549845c0fa2206a4cb29d54752dc5650d9db58c1bbe1f7d0fc15ce04551853fb6454873877dbb88bebd15d81b875b405cdcc2fd21a515820d3

Download Submit
C:\Users\Admin\AppData\Local\Temp\XWorm V3.1.exe
Filesize
6.9MB

MD5
37a9fdc56e605d2342da88a6e6182b4b

SHA1
20bc3df33bbbb676d2a3c572cff4c1d58c79055d

SHA256
422ba689937e3748a4b6bd3c5af2dce0211e8a48eb25767e6d1d2192d27f1f58

SHA512
f556805142b77b549845c0fa2206a4cb29d54752dc5650d9db58c1bbe1f7d0fc15ce04551853fb6454873877dbb88bebd15d81b875b405cdcc2fd21a515820d3

Download Submit
C:\Users\Admin\AppData\Local\Temp\XWorm V3.1.exe
Filesize
6.9MB

MD5
37a9fdc56e605d2342da88a6e6182b4b

SHA1
20bc3df33bbbb676d2a3c572cff4c1d58c79055d

SHA256
422ba689937e3748a4b6bd3c5af2dce0211e8a48eb25767e6d1d2192d27f1f58

SHA512
f556805142b77b549845c0fa2206a4cb29d54752dc5650d9db58c1bbe1f7d0fc15ce04551853fb6454873877dbb88bebd15d81b875b405cdcc2fd21a515820d3

Download Submit
C:\Users\Admin\AppData\Local\Temp\svchost.exe
Filesize
61KB

MD5
e59c2ff54922cbc9a69e7ae878539eb8

SHA1
09f50da27d4bd6a9a4f7c46743734496b3e8359a

SHA256
d6ba147ab0933d4ecb539071a4b6c32e3d24856c5badd508db33de2692644e88

SHA512
10cf7859f2e2c75a24495b2d05deb4e5f770ebd80b4831b3b603df83d3a004e102429658e01acb7609b6c774441328bf9420292e66352a4759a70a700750c9a4

Download Submit
C:\Users\Admin\AppData\Local\Temp\svchost.exe
Filesize
61KB

MD5
e59c2ff54922cbc9a69e7ae878539eb8

SHA1
09f50da27d4bd6a9a4f7c46743734496b3e8359a

SHA256
d6ba147ab0933d4ecb539071a4b6c32e3d24856c5badd508db33de2692644e88

SHA512
10cf7859f2e2c75a24495b2d05deb4e5f770ebd80b4831b3b603df83d3a004e102429658e01acb7609b6c774441328bf9420292e66352a4759a70a700750c9a4

Download Submit
C:\Users\Admin\AppData\Local\Temp\svchost.exe
Filesize
61KB

MD5
e59c2ff54922cbc9a69e7ae878539eb8

SHA1
09f50da27d4bd6a9a4f7c46743734496b3e8359a

SHA256
d6ba147ab0933d4ecb539071a4b6c32e3d24856c5badd508db33de2692644e88

SHA512
10cf7859f2e2c75a24495b2d05deb4e5f770ebd80b4831b3b603df83d3a004e102429658e01acb7609b6c774441328bf9420292e66352a4759a70a700750c9a4

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpCD67.tmp.bat
Filesize
163B

MD5
bb948171c165cab2d89af1d788668ea7

SHA1
ea10b5a47f31629cf100474ac0e792577922ae2e

SHA256
b9acebe9633f6dd21f1a6cd15ea7cd39b600ace59d1c86aff3b386463d24ca03

SHA512
3d4316a34c9aa85e5c1c3cbff6b05f5f4409da631f3054c1e7b800871213841aa9210fcf9610a86c1dd245b7ebcc7cb9046461f9a4004a2b40956d33cfd07f50

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE573.tmp.bat
Filesize
160B

MD5
e707b296126fc7241bdbf79a7fef6735

SHA1
fafa0009de3270b0c996ab488cf751cef15b8e3e

SHA256
76be6dd3f89942b1c527413e23b7d9b4afb0cacc79951c24c4c815c7eb4bdecf

SHA512
99c226046c27e3a92a730c58780348b27df6f8703b354d9a255c7c20953b4b9586e7283ee325d48b1254c2e6bc64d8b08cc711e4d58ec5674fabf2e4bf09913e

Download Submit
C:\Users\Admin\AppData\Roaming\ContainerRuntime.exe
Filesize
61KB

MD5
e59c2ff54922cbc9a69e7ae878539eb8

SHA1
09f50da27d4bd6a9a4f7c46743734496b3e8359a

SHA256
d6ba147ab0933d4ecb539071a4b6c32e3d24856c5badd508db33de2692644e88

SHA512
10cf7859f2e2c75a24495b2d05deb4e5f770ebd80b4831b3b603df83d3a004e102429658e01acb7609b6c774441328bf9420292e66352a4759a70a700750c9a4

Download Submit
C:\Users\Admin\AppData\Roaming\ContainerRuntime.exe
Filesize
61KB

MD5
e59c2ff54922cbc9a69e7ae878539eb8

SHA1
09f50da27d4bd6a9a4f7c46743734496b3e8359a

SHA256
d6ba147ab0933d4ecb539071a4b6c32e3d24856c5badd508db33de2692644e88

SHA512
10cf7859f2e2c75a24495b2d05deb4e5f770ebd80b4831b3b603df83d3a004e102429658e01acb7609b6c774441328bf9420292e66352a4759a70a700750c9a4

Download Submit
memory/1248-158-0x0000000000DC0000-0x0000000000DD6000-memory.dmp

Filesize
88KB

Download
memory/1788-136-0x0000000000D00000-0x0000000001C68000-memory.dmp

Filesize
15.4MB

Download
memory/1788-138-0x0000000005D50000-0x0000000005DEC000-memory.dmp

Filesize
624KB

Download
memory/1788-166-0x0000000000D00000-0x0000000001C68000-memory.dmp

Filesize
15.4MB

Download
memory/1788-137-0x0000000000D00000-0x0000000001C68000-memory.dmp

Filesize
15.4MB

Download
memory/1788-159-0x0000000006520000-0x0000000006AC4000-memory.dmp

Filesize
5.6MB

Download
memory/1788-133-0x0000000000D00000-0x0000000001C68000-memory.dmp

Filesize
15.4MB

Download
memory/4220-168-0x000000001CC60000-0x000000001CC70000-memory.dmp

Filesize
64KB

Download
memory/4220-171-0x000000001CC60000-0x000000001CC70000-memory.dmp

Filesize
64KB

Download
memory/4220-160-0x0000000000110000-0x0000000000806000-memory.dmp

Filesize
7.0MB

Download
memory/4220-180-0x000000001CC60000-0x000000001CC70000-memory.dmp

Filesize
64KB

Download
memory/4220-182-0x000000001CC60000-0x000000001CC70000-memory.dmp

Filesize
64KB

Download
memory/4768-181-0x00000000056C0000-0x00000000056D0000-memory.dmp

Filesize
64KB

Download
memory/4768-183-0x0000000005DB0000-0x0000000005E42000-memory.dmp

Filesize
584KB

Download
memory/4768-184-0x00000000061B0000-0x00000000061BA000-memory.dmp

Filesize
40KB

Download
memory/4768-185-0x00000000056C0000-0x00000000056D0000-memory.dmp

Filesize
64KB

Download