asyncrat | 91a8aec23ab8e79172c8d7cbf6a733e73157941687eb58e8ffa543b7e721b7ea

Analysis

max time kernel
125s
max time network
143s
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 21:59

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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 7 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/1716-158-0x0000000000010000-0x0000000000026000-memory.dmp	asyncrat
behavioral2/memory/4404-168-0x000000001D8A0000-0x000000001D8B0000-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\SystemBiosVersion	XWorm V3.1 .exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	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-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation	XWorm V3.1 .exe
Key value queried	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation	svchost.exe

Executes dropped EXE 3 IoCs

Processes:

XWorm V3.1.exesvchost.exeContainerRuntime.exe

pid process

4404 XWorm V3.1.exe
1716 svchost.exe
2968 ContainerRuntime.exe

pid	process
4404	XWorm V3.1.exe
1716	svchost.exe
2968	ContainerRuntime.exe

Themida packer 3 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral2/memory/4232-136-0x0000000000BD0000-0x0000000001B38000-memory.dmp	themida
behavioral2/memory/4232-137-0x0000000000BD0000-0x0000000001B38000-memory.dmp	themida
behavioral2/memory/4232-166-0x0000000000BD0000-0x0000000001B38000-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

4232 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

3848 schtasks.exe
Delays execution with timeout.exe 2 IoCs
evasion

Processes:

timeout.exetimeout.exe

pid process

100 timeout.exe
1392 timeout.exe

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

pid	process
4232	XWorm V3.1 .exe

pid	process
3848	schtasks.exe

pid	process
100	timeout.exe
1392	timeout.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

Processes:

svchost.exeContainerRuntime.exe

pid	process
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
1716	svchost.exe
2968	ContainerRuntime.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

XWorm V3.1.exesvchost.exeContainerRuntime.exe

description pid process

Token: SeDebugPrivilege 4404 XWorm V3.1.exe
Token: SeDebugPrivilege 1716 svchost.exe
Token: SeDebugPrivilege 2968 ContainerRuntime.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

ContainerRuntime.exe

pid process

2968 ContainerRuntime.exe

description	pid	process
Token: SeDebugPrivilege	4404	XWorm V3.1.exe
Token: SeDebugPrivilege	1716	svchost.exe
Token: SeDebugPrivilege	2968	ContainerRuntime.exe

pid	process
2968	ContainerRuntime.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

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

description	pid	process	target process
PID 4232 wrote to memory of 4404	4232	XWorm V3.1 .exe	XWorm V3.1.exe
PID 4232 wrote to memory of 4404	4232	XWorm V3.1 .exe	XWorm V3.1.exe
PID 4232 wrote to memory of 1716	4232	XWorm V3.1 .exe	svchost.exe
PID 4232 wrote to memory of 1716	4232	XWorm V3.1 .exe	svchost.exe
PID 4232 wrote to memory of 1716	4232	XWorm V3.1 .exe	svchost.exe
PID 4232 wrote to memory of 4032	4232	XWorm V3.1 .exe	cmd.exe
PID 4232 wrote to memory of 4032	4232	XWorm V3.1 .exe	cmd.exe
PID 4232 wrote to memory of 4032	4232	XWorm V3.1 .exe	cmd.exe
PID 4032 wrote to memory of 100	4032	cmd.exe	timeout.exe
PID 4032 wrote to memory of 100	4032	cmd.exe	timeout.exe
PID 4032 wrote to memory of 100	4032	cmd.exe	timeout.exe
PID 1716 wrote to memory of 4820	1716	svchost.exe	cmd.exe
PID 1716 wrote to memory of 4820	1716	svchost.exe	cmd.exe
PID 1716 wrote to memory of 4820	1716	svchost.exe	cmd.exe
PID 1716 wrote to memory of 3700	1716	svchost.exe	cmd.exe
PID 1716 wrote to memory of 3700	1716	svchost.exe	cmd.exe
PID 1716 wrote to memory of 3700	1716	svchost.exe	cmd.exe
PID 3700 wrote to memory of 1392	3700	cmd.exe	timeout.exe
PID 3700 wrote to memory of 1392	3700	cmd.exe	timeout.exe
PID 3700 wrote to memory of 1392	3700	cmd.exe	timeout.exe
PID 4820 wrote to memory of 3848	4820	cmd.exe	schtasks.exe
PID 4820 wrote to memory of 3848	4820	cmd.exe	schtasks.exe
PID 4820 wrote to memory of 3848	4820	cmd.exe	schtasks.exe
PID 3700 wrote to memory of 2968	3700	cmd.exe	ContainerRuntime.exe
PID 3700 wrote to memory of 2968	3700	cmd.exe	ContainerRuntime.exe
PID 3700 wrote to memory of 2968	3700	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:4232

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:4404

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:1716

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:4820

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:3848

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9DCB.tmp.bat""
3⤵
- Suspicious use of WriteProcessMemory
PID:3700

C:\Windows\SysWOW64\timeout.exe
timeout 3
4⤵
- Delays execution with timeout.exe
PID:1392

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:2968

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp87D2.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:4032

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:100

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\tmp87D2.tmp.bat
Filesize
163B

MD5
8a5484a503dc0f7ea8e970b700d8c195

SHA1
2f85155453ee62c627a136a271fc6a4c2bc81dd9

SHA256
ec22a57ce3fd2c251cbae204a40b5b2f1302218208dd403ff52457c295377701

SHA512
8c395ec02276e2a54a773f9a0144e33edb6e68ad37911c50cea67b1dfd94c468aad90f673c29d862ad6c0beb1017ceb2ee9caed016d7781de00ca50165894b8b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9DCB.tmp.bat
Filesize
160B

MD5
c94e1f33cc53a12c2fb4cfde7b13499f

SHA1
c970ce9e3b39c621672f7534eeed8561b64c972a

SHA256
493a8b5d7a6f13cf9f0438c0853f3f77bc1bb9dff26917195b5ef13decf2854f

SHA512
ed5b9f87a731bf9c3de4100d07e1aa1b6e1cfb770613a2a7e01a7a86720121c57fb60afe1eb02caf8e624120507b3af144b4ffb58009d83672e4fb674b1162db

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/1716-158-0x0000000000010000-0x0000000000026000-memory.dmp

Filesize
88KB

Download
memory/2968-184-0x0000000005450000-0x0000000005460000-memory.dmp

Filesize
64KB

Download
memory/2968-182-0x0000000005DC0000-0x0000000005DCA000-memory.dmp

Filesize
40KB

Download
memory/2968-181-0x0000000005B80000-0x0000000005C12000-memory.dmp

Filesize
584KB

Download
memory/4232-166-0x0000000000BD0000-0x0000000001B38000-memory.dmp

Filesize
15.4MB

Download
memory/4232-136-0x0000000000BD0000-0x0000000001B38000-memory.dmp

Filesize
15.4MB

Download
memory/4232-133-0x0000000000BD0000-0x0000000001B38000-memory.dmp

Filesize
15.4MB

Download
memory/4232-137-0x0000000000BD0000-0x0000000001B38000-memory.dmp

Filesize
15.4MB

Download
memory/4232-138-0x0000000006250000-0x00000000062EC000-memory.dmp

Filesize
624KB

Download
memory/4232-161-0x0000000006A80000-0x0000000007024000-memory.dmp

Filesize
5.6MB

Download
memory/4404-168-0x000000001D8A0000-0x000000001D8B0000-memory.dmp

Filesize
64KB

Download
memory/4404-171-0x000000001D8A0000-0x000000001D8B0000-memory.dmp

Filesize
64KB

Download
memory/4404-180-0x000000001D8A0000-0x000000001D8B0000-memory.dmp

Filesize
64KB

Download
memory/4404-183-0x000000001D8A0000-0x000000001D8B0000-memory.dmp

Filesize
64KB

Download
memory/4404-159-0x0000000000EE0000-0x00000000015D6000-memory.dmp

Filesize
7.0MB

Download