xworm | 6f429d58a42e834613002fae6ab2b1b0f955c19830ed9a446904c9fd0c96d703

General

Target

DeltaClient.exe
Size

1.0MB
MD5

eb67015b03010c123ca71feae9dd650e
SHA1

781ef9f850fed5c05dbd8370ea06a267c95a6acc
SHA256

6f429d58a42e834613002fae6ab2b1b0f955c19830ed9a446904c9fd0c96d703
SHA512

22261e79a66336715287e7a420e2bcef2410da7c1cda333b2dad4ef89076af291adc52f8408e561d69e71428d4fd52e87177f980ff30601bc0fdc7d9f8673274
SSDEEP

24576:L5nlQBTFlRtuKcNzH9zupNdfxfinXpiRyA:ZeTFlVEzBundJanZQyA

Score

10^/10

xworm discovery execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

sackedrai-44446.portmap.host:44446

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral2/files/0x000c000000023bc0-4.dat	family_xworm
behavioral2/memory/4560-20-0x0000000000270000-0x0000000000286000-memory.dmp	family_xworm
behavioral2/memory/4856-24-0x0000000000400000-0x0000000000508000-memory.dmp	family_xworm

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

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
5032	powershell.exe
4048	powershell.exe
3484	powershell.exe
1372	powershell.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-925314154-1797147466-1467878628-1000\Control Panel\International\Geo\Nation	DeltaClient.exe
Key value queried	\REGISTRY\USER\S-1-5-21-925314154-1797147466-1467878628-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
4560	XClient.exe
1084	Starvail.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-1-5-21-925314154-1797147466-1467878628-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xclient = "C:\\Users\\Admin\\AppData\\Roaming\\xclient"	XClient.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DeltaClient.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
3484	powershell.exe
3484	powershell.exe
3484	powershell.exe
1372	powershell.exe
1372	powershell.exe
1372	powershell.exe
5032	powershell.exe
5032	powershell.exe
5032	powershell.exe
4048	powershell.exe
4048	powershell.exe
4048	powershell.exe
4560	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4560	XClient.exe
Token: SeDebugPrivilege	3484	powershell.exe
Token: SeDebugPrivilege	1372	powershell.exe
Token: SeDebugPrivilege	5032	powershell.exe
Token: SeDebugPrivilege	4048	powershell.exe
Token: SeDebugPrivilege	4560	XClient.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
1084	Starvail.exe
1084	Starvail.exe
1084	Starvail.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
1084	Starvail.exe
1084	Starvail.exe
1084	Starvail.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1084	Starvail.exe
4560	XClient.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4856 wrote to memory of 4560	4856	DeltaClient.exe	88
PID 4856 wrote to memory of 4560	4856	DeltaClient.exe	88
PID 4856 wrote to memory of 1084	4856	DeltaClient.exe	89
PID 4856 wrote to memory of 1084	4856	DeltaClient.exe	89
PID 4560 wrote to memory of 3484	4560	XClient.exe	92
PID 4560 wrote to memory of 3484	4560	XClient.exe	92
PID 4560 wrote to memory of 1372	4560	XClient.exe	96
PID 4560 wrote to memory of 1372	4560	XClient.exe	96
PID 4560 wrote to memory of 5032	4560	XClient.exe	98
PID 4560 wrote to memory of 5032	4560	XClient.exe	98
PID 4560 wrote to memory of 4048	4560	XClient.exe	100
PID 4560 wrote to memory of 4048	4560	XClient.exe	100

C:\Users\Admin\AppData\Local\Temp\DeltaClient.exe
"C:\Users\Admin\AppData\Local\Temp\DeltaClient.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4856
- C:\Users\Admin\AppData\Local\Temp\XClient.exe
  "C:\Users\Admin\AppData\Local\Temp\XClient.exe"
  2⤵
  - Checks computer location settings
  - 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:4560
- - 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\Local\Temp\XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3484
- - 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:1372
- - 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'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:5032
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'xclient'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4048
- C:\Users\Admin\AppData\Local\Temp\Starvail.exe
  "C:\Users\Admin\AppData\Local\Temp\Starvail.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  PID:1084

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x514 0x558
1⤵
PID:244

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

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
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
07a771c4f31f62b2d04e2befaa36dce7

SHA1
662952ede6c1acbb575e8149a5ac2f08edade811

SHA256
a2df2570980e1123d9af8e12a27a82d3a4d332f0e7dd44e4e225743207c099b3

SHA512
9e339a2d0bfaf5bbe5252f69061652c5880fe1233930830ca7190a65516366e05129907b1656a6790c0093ad82ac73ddee6738d0b78ecb1e3d888f467b889fe9

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

Filesize
944B

MD5
10890cda4b6eab618e926c4118ab0647

SHA1
1e1d63b73a0e6c7575f458b3c7917a9ce5ba776d

SHA256
00f8a035324d39bd62e6dee5e1b480069015471c487ebee4479e6990ea9ddb14

SHA512
a2ee84006c24a36f25e0bca0772430d64e3791f233da916aecdeae6712763e77d55bbbd00dc8f6b2b3887f3c26ab3980b96c5f46cc823e81e28abbbc5fc78221

Download Submit
C:\Users\Admin\AppData\Local\Temp\Starvail.exe

Filesize
887KB

MD5
b51ebe489a541f786d3aaa3c9c3e6405

SHA1
2689bde73ef6bc04b9b95f3d3df735e47c0740ee

SHA256
ef78da2ae48313ae60685e3c04eae36379c1e9ebcc70a416e0409d21187417ab

SHA512
c4c874beaeefa4869015b8d49a562d89a4ee3f546a4bc09422c537cd11b35f4f7d4c7998cad6a537875ff312db8c7cded3d6288d3b4ae777b813f998e520fce1

Download Submit
C:\Users\Admin\AppData\Local\Temp\XClient.exe

Filesize
63KB

MD5
fee58580f8ad4201dbafc4333a539f2b

SHA1
f459e730e56649f9a47fe9e476a29434e550e7c3

SHA256
32cf120b19b76f156cc7009768d4302fc606ece79b1cfef5fa229c2102cd0533

SHA512
7962f3fe1623842da4440d6ef5b1f5f032e9d31bd0cd5df95779fcbb60b99b854cc74622311bba838be024f59ba3d71e7bd4a723ddc609b9c4cf3e9e31fe2bd5

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1bo1jvzy.dwj.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\Documents\ClownfishVoiceChanger.ini

Filesize
841B

MD5
8308bd8db4c9c9ea60fc11a3581f7a2f

SHA1
877924821e2c27761813ad835a707890d4b8f795

SHA256
3d29a11a654777c1fef734b6bb299d8fc299f70b589dfbe447c4a9ada73a9ce0

SHA512
530e3b9e070f85c0308044c6320a7eada0056b704cdfd13c0b3b0a6974a651631bd12f81b486f21149edfb08a78d7c94ea631ec83f558e75b48568cf82feacd3

Download Submit
memory/3484-78-0x0000011C1AF30000-0x0000011C1AF52000-memory.dmp

Filesize
136KB

Download
memory/4560-20-0x0000000000270000-0x0000000000286000-memory.dmp

Filesize
88KB

Download
memory/4560-14-0x00007FFEC01D3000-0x00007FFEC01D5000-memory.dmp

Filesize
8KB

Download
memory/4560-127-0x00007FFEC01D0000-0x00007FFEC0C91000-memory.dmp

Filesize
10.8MB

Download
memory/4560-133-0x00007FFEC01D0000-0x00007FFEC0C91000-memory.dmp

Filesize
10.8MB

Download
memory/4856-24-0x0000000000400000-0x0000000000508000-memory.dmp

Filesize
1.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads