asyncrat | f4cbcc2254e8b74d272b7148322a08159d4e4293fa825cb7547e319fff13ca8d

Analysis

max time kernel
148s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
30/05/2024, 16:09 UTC

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General

Target

feather.exe
Size

166KB
MD5

fad02083c3a1d764db408e919d1430ef
SHA1

f0e36f0c51e259bb801c1b53767b4d2b70e62ac2
SHA256

f4cbcc2254e8b74d272b7148322a08159d4e4293fa825cb7547e319fff13ca8d
SHA512

108ed0ebf60ab3ba4b5ff9a39156278a13200b8854a5e520bca1a7e5a6ec04e674cd7633deb67657fbc32488a3d31490c4dd03ef14f541f906f067338646c56c
SSDEEP

3072:09AtuJ3r8fHevWOVj2VFPTUuRKNhzvpLXLTrfQVCaA0i:096uJ3rSpbPXRKNdpLXLTzQVCaA0

Score

10^/10

asyncrat xworm default execution persistence rat trojan

Malware Config

Extracted

Family

xworm

19.ip.gl.ply.gg:38173

Attributes

Install_directory
%Userprofile%
install_file
Runtime Broker.exe

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

127.0.0.1:38173

Mutex

epykvfetbqzwboxh

Attributes

delay
1
install
false
install_folder
%AppData%

aes.plain

1
wNgkUAUz6PMjnIfcCkvjnmU6pJWaiNaG

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000700000002a9a6-17.dat	family_xworm
behavioral1/memory/1756-26-0x0000000000AE0000-0x0000000000AFA000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x000700000002a970-6.dat	family_asyncrat

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
784	powershell.exe
964	powershell.exe
1748	powershell.exe
2200	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Runtime Broker.lnk	XClient.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Runtime Broker.lnk	XClient.exe

Executes dropped EXE 2 IoCs

pid	Process
1540	Client.exe
1756	XClient.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2457560273-69882387-977367775-1000\Software\Microsoft\Windows\CurrentVersion\Run\Runtime Broker = "C:\\Users\\Admin\\Runtime Broker.exe"	XClient.exe

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

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/Job

T1053

pid	Process
3008	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3124	timeout.exe

Suspicious behavior: EnumeratesProcesses 40 IoCs

pid	Process
1540	Client.exe
1540	Client.exe
964	powershell.exe
964	powershell.exe
1748	powershell.exe
1748	powershell.exe
2200	powershell.exe
2200	powershell.exe
784	powershell.exe
784	powershell.exe
1756	XClient.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe
1540	Client.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	1540	Client.exe
Token: SeDebugPrivilege	1756	XClient.exe
Token: SeDebugPrivilege	964	powershell.exe
Token: SeDebugPrivilege	1748	powershell.exe
Token: SeDebugPrivilege	2200	powershell.exe
Token: SeDebugPrivilege	784	powershell.exe
Token: SeDebugPrivilege	1756	XClient.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1540	Client.exe
1756	XClient.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1568 wrote to memory of 1540	1568	feather.exe	78
PID 1568 wrote to memory of 1540	1568	feather.exe	78
PID 1568 wrote to memory of 1756	1568	feather.exe	79
PID 1568 wrote to memory of 1756	1568	feather.exe	79
PID 1756 wrote to memory of 964	1756	XClient.exe	80
PID 1756 wrote to memory of 964	1756	XClient.exe	80
PID 1756 wrote to memory of 1748	1756	XClient.exe	82
PID 1756 wrote to memory of 1748	1756	XClient.exe	82
PID 1756 wrote to memory of 2200	1756	XClient.exe	84
PID 1756 wrote to memory of 2200	1756	XClient.exe	84
PID 1756 wrote to memory of 784	1756	XClient.exe	86
PID 1756 wrote to memory of 784	1756	XClient.exe	86
PID 1756 wrote to memory of 3008	1756	XClient.exe	88
PID 1756 wrote to memory of 3008	1756	XClient.exe	88
PID 1756 wrote to memory of 3840	1756	XClient.exe	91
PID 1756 wrote to memory of 3840	1756	XClient.exe	91
PID 1756 wrote to memory of 4912	1756	XClient.exe	93
PID 1756 wrote to memory of 4912	1756	XClient.exe	93
PID 4912 wrote to memory of 3124	4912	cmd.exe	95
PID 4912 wrote to memory of 3124	4912	cmd.exe	95

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\feather.exe
"C:\Users\Admin\AppData\Local\Temp\feather.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1568
- C:\Users\Admin\AppData\Roaming\Client.exe
  "C:\Users\Admin\AppData\Roaming\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:1540
- C:\Users\Admin\AppData\Roaming\XClient.exe
  "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1756
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:964
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1748
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\Runtime Broker.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2200
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Runtime Broker.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:784
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Runtime Broker" /tr "C:\Users\Admin\Runtime Broker.exe"
    3⤵
    - Creates scheduled task(s)
    PID:3008
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /delete /f /tn "Runtime Broker"
    3⤵
    PID:3840
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpD12B.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4912
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:3124

Network

DNS

19.ip.gl.ply.gg

XClient.exe

Remote address:

8.8.8.8:53

Request

19.ip.gl.ply.gg

IN A

Response

19.ip.gl.ply.gg

IN A

147.185.221.19
DNS

19.221.185.147.in-addr.arpa

XClient.exe

Remote address:

8.8.8.8:53

Request

19.221.185.147.in-addr.arpa

IN PTR

Response
DNS

14.227.111.52.in-addr.arpa

XClient.exe

Remote address:

8.8.8.8:53

Request

14.227.111.52.in-addr.arpa

IN PTR

Response
DNS

88.16.208.104.in-addr.arpa

XClient.exe

Remote address:

8.8.8.8:53

Request

88.16.208.104.in-addr.arpa

IN PTR

Response
DNS

8.8.8.8.in-addr.arpa

Remote address:

8.8.8.8:53

Request

8.8.8.8.in-addr.arpa

IN PTR

Response

8.8.8.8.in-addr.arpa

IN PTR

dnsgoogle
DNS

nexusrules.officeapps.live.com

Remote address:

8.8.8.8:53

Request

nexusrules.officeapps.live.com

IN A

Response

nexusrules.officeapps.live.com

IN CNAME

prod.nexusrules.live.com.akadns.net

prod.nexusrules.live.com.akadns.net

IN A

52.111.227.14
DNS

self.events.data.microsoft.com

Remote address:

8.8.8.8:53

Request

self.events.data.microsoft.com

IN A

Response

self.events.data.microsoft.com

IN CNAME

self-events-data.trafficmanager.net

self-events-data.trafficmanager.net

IN CNAME

onedscolprdcus08.centralus.cloudapp.azure.com

onedscolprdcus08.centralus.cloudapp.azure.com

IN A

104.208.16.88

127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
147.185.221.19:38173

19.ip.gl.ply.gg

XClient.exe

506 B
250 B
5
5
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe
127.0.0.1:38173

Client.exe

8.8.8.8:53

19.ip.gl.ply.gg

dns

XClient.exe

278 B
511 B
4
4

DNS Request

19.ip.gl.ply.gg

DNS Response

147.185.221.19

DNS Request

19.221.185.147.in-addr.arpa

DNS Request

14.227.111.52.in-addr.arpa

DNS Request

88.16.208.104.in-addr.arpa
8.8.8.8:53

8.8.8.8.in-addr.arpa

dns

218 B
428 B
3
3

DNS Request

8.8.8.8.in-addr.arpa

DNS Request

nexusrules.officeapps.live.com

DNS Response

52.111.227.14

DNS Request

self.events.data.microsoft.com

DNS Response

104.208.16.88

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
05b3cd21c1ec02f04caba773186ee8d0

SHA1
39e790bfe10abf55b74dfb3603df8fcf6b5e6edb

SHA256
911efc5cf9cbeb697543eb3242f5297e1be46dd6603a390140a9ff031ed9e1e8

SHA512
e751008b032394817beb46937fd93a73be97254c2be94dd42f22fb1306d2715c653ece16fa96eab1a3e73811936768cea6b37888437086fc6f3e3e793a2515eb

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
b26e5bedfb520c4c341b64a636b83fe1

SHA1
991188792f4778e59ff166007bebc549107128dc

SHA256
34836bf15fe6bf8a0903f9065338c160ea03b4f26d1217dd0c294fec4a7feafb

SHA512
b93c4eb59fffdc7ba829442156b5af536d4865362a2abecef717ed92612e2e14c10a702f25bb2a1ed0b43dcdbd2e62ef7bfdf6d435c21fc06873d9a4642efd7b

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
cef328ddb1ee8916e7a658919323edd8

SHA1
a676234d426917535e174f85eabe4ef8b88256a5

SHA256
a1b5b7ada8ebc910f20f91ada3991d3321104e9da598c958b1edac9f9aca0e90

SHA512
747400c20ca5b5fd1b54bc24e75e6a78f15af61df263be932d2ee7b2f34731c2de8ce03b2706954fb098c1ac36f0b761cf37e418738fa91f2a8ea78572f545cb

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xii14lyk.nwc.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpD12B.tmp.bat

Filesize
156B

MD5
6028d5fd1b35b081ae6ab06df998a3b7

SHA1
dfb5de12aca5414adee65a09f0583270e9306f5c

SHA256
5f9ee0a2f5ef0e070d0ff48a2e51e7d4db6693de221e0332d884fa089592650b

SHA512
9a9ca4e9d6a9ebd45f5e1663064872a61b884dcb3b50c5f12d806e6b1d655c3b3e78ce1e3f04486dfea2c718bde99960d8caaf46cde2e4f7dfbf21b7cecf3c8e

Download Submit
C:\Users\Admin\AppData\Roaming\Client.exe

Filesize
74KB

MD5
f8ec02f0ad41f3e984037b398641f3bb

SHA1
88d64ad9840e65bcd5d27323a0fe2214d00d7346

SHA256
12cdd3df8d582bc30a49c2b4f8cf96d522e0f01d64f2e7df17276dc89fdb1a75

SHA512
31d177cceba0a3698f696c5daa0265ebe3fecf8a2a2934290e574789811a68c7313c1b0b40b1bae88666088c87fc9336941e10f26952a442c9cc3ca9637f5322

Download Submit
C:\Users\Admin\AppData\Roaming\XClient.exe

Filesize
75KB

MD5
74fcef65a288af74b2a36dd6895264f8

SHA1
d5d73bb877f0aee6962f49c87603eec9d5b4846b

SHA256
ed308d6d8768d98145916f4529e0b444058105f401acf1e01bdacadf39a637b1

SHA512
c342445070326c126ae5841cc88a3cdcd2ae6bd995a37903ca6cacb517dc3ed7ada4c9fb7c020ad814824d2a5a29fd909da895c40475aec5ec6499778e25772a

Download Submit
memory/964-30-0x000002A3ACE20000-0x000002A3ACE42000-memory.dmp

Filesize
136KB

Download
memory/1540-28-0x00007FFAC46D0000-0x00007FFAC5192000-memory.dmp

Filesize
10.8MB

Download
memory/1540-25-0x0000000000EA0000-0x0000000000EB8000-memory.dmp

Filesize
96KB

Download
memory/1540-84-0x00007FFAC46D0000-0x00007FFAC5192000-memory.dmp

Filesize
10.8MB

Download
memory/1568-0-0x00007FFAC46D3000-0x00007FFAC46D5000-memory.dmp

Filesize
8KB

Download
memory/1568-1-0x0000000000090000-0x00000000000C0000-memory.dmp

Filesize
192KB

Download
memory/1756-29-0x00007FFAC46D0000-0x00007FFAC5192000-memory.dmp

Filesize
10.8MB

Download
memory/1756-26-0x0000000000AE0000-0x0000000000AFA000-memory.dmp

Filesize
104KB

Download
memory/1756-83-0x00007FFAC46D0000-0x00007FFAC5192000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

DNS Request

DNS Response

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Response

DNS Request

DNS Response

MITRE ATT&CK Enterprise v15

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