xworm | ad335bba6ec965c12c17a0fb8ae86aa26beebca57e63fba662757a79f1d6df22

General

Target

XClient.exe
Size

41KB
MD5

cb09c9133f40c4903525fa5a7df4c405
SHA1

e8496990338d09a6b73d4808e3aada0f50cf758a
SHA256

ad335bba6ec965c12c17a0fb8ae86aa26beebca57e63fba662757a79f1d6df22
SHA512

be757f81deb1b8f43d51332d383ff829524ea94a54a732576b30bdba43a31eee2dfc9cd8ed5dce2cd06e191c307db2ddee687895a0de5ad6bc9709d167631b1f
SSDEEP

768:KU0MzzOOfBbw197oyoyv08cr/rZ+IF5Pa9n2e6iOwhM3sik:KU0M/bZbwXsyrs3rd9F492e6iOwSNk

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

https://pastebin.com/raw/qaWffTar:5

Mutex

C6npgtaAk9A5snxm

Attributes

Install_directory
%AppData%
install_file
svchost.exe
pastebin_url
https://pastebin.com/raw/qaWffTar

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3812-1-0x0000000000100000-0x0000000000110000-memory.dmp	family_xworm
C:\Users\Admin\AppData\Roaming\svchost.exe	family_xworm

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

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid process

772 powershell.exe
2068 powershell.exe
4128 powershell.exe
4828 powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

XClient.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

Processes:

XClient.exe

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

Executes dropped EXE 3 IoCs

Processes:

svchost.exesvchost.exesvchost.exe

pid process

4964 svchost.exe
4652 svchost.exe
1384 svchost.exe

pid	process
4964	svchost.exe
4652	svchost.exe
1384	svchost.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

XClient.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	XClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

34 pastebin.com
35 pastebin.com
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

26 ip-api.com
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

Processes:

schtasks.exe

pid process

1516 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4164 timeout.exe

flow	ioc
34	pastebin.com
35	pastebin.com

flow	ioc
26	ip-api.com

pid	process
1516	schtasks.exe

pid	process
4164	timeout.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exeXClient.exe

pid	process
772	powershell.exe
772	powershell.exe
772	powershell.exe
2068	powershell.exe
2068	powershell.exe
4128	powershell.exe
4128	powershell.exe
4828	powershell.exe
4828	powershell.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe
3812	XClient.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

XClient.exe

pid process

3812 XClient.exe

pid	process
3812	XClient.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

Processes:

XClient.exepowershell.exepowershell.exepowershell.exepowershell.exesvchost.exesvchost.exesvchost.exe

description	pid	process
Token: SeDebugPrivilege	3812	XClient.exe
Token: SeDebugPrivilege	772	powershell.exe
Token: SeDebugPrivilege	2068	powershell.exe
Token: SeDebugPrivilege	4128	powershell.exe
Token: SeDebugPrivilege	4828	powershell.exe
Token: SeDebugPrivilege	3812	XClient.exe
Token: SeDebugPrivilege	4964	svchost.exe
Token: SeDebugPrivilege	4652	svchost.exe
Token: SeDebugPrivilege	1384	svchost.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

notepad.exe

pid process

3236 notepad.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

XClient.exe

pid process

3812 XClient.exe

pid	process
3236	notepad.exe

pid	process
3812	XClient.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

XClient.execmd.exe

description	pid	process	target process
PID 3812 wrote to memory of 772	3812	XClient.exe	powershell.exe
PID 3812 wrote to memory of 772	3812	XClient.exe	powershell.exe
PID 3812 wrote to memory of 2068	3812	XClient.exe	powershell.exe
PID 3812 wrote to memory of 2068	3812	XClient.exe	powershell.exe
PID 3812 wrote to memory of 4128	3812	XClient.exe	powershell.exe
PID 3812 wrote to memory of 4128	3812	XClient.exe	powershell.exe
PID 3812 wrote to memory of 4828	3812	XClient.exe	powershell.exe
PID 3812 wrote to memory of 4828	3812	XClient.exe	powershell.exe
PID 3812 wrote to memory of 1516	3812	XClient.exe	schtasks.exe
PID 3812 wrote to memory of 1516	3812	XClient.exe	schtasks.exe
PID 3812 wrote to memory of 3280	3812	XClient.exe	schtasks.exe
PID 3812 wrote to memory of 3280	3812	XClient.exe	schtasks.exe
PID 3812 wrote to memory of 1008	3812	XClient.exe	cmd.exe
PID 3812 wrote to memory of 1008	3812	XClient.exe	cmd.exe
PID 1008 wrote to memory of 4164	1008	cmd.exe	timeout.exe
PID 1008 wrote to memory of 4164	1008	cmd.exe	timeout.exe

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\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3812

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'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:772

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2068

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\svchost.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4128

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4828

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Roaming\svchost.exe"
2⤵
- Creates scheduled task(s)
PID:1516

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /delete /f /tn "svchost"
2⤵
PID:3280

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpFFA3.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:1008

C:\Windows\system32\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:4164

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4964

C:\Windows\system32\notepad.exe
"C:\Windows\system32\notepad.exe"
1⤵
- Suspicious use of FindShellTrayWindow
PID:3236

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4652

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1384

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

Scheduled Task/Job

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1

T1102

Impact

Resource Development

Reconnaissance

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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\CLR_v4.0\UsageLogs\svchost.exe.log
Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
e58749a7a1826f6ea62df1e2ef63a32b

SHA1
c0bca21658b8be4f37b71eec9578bfefa44f862d

SHA256
0e1f0e684adb40a5d0668df5fed007c9046137d7ae16a1f2f343b139d5f9bc93

SHA512
4cf45b2b11ab31e7f67fff286b29d50ed28cd6043091144c5c0f1348b5f5916ed7479cf985595e6f096b586ab93b4b5dce612f688049b8366a2dd91863e98b70

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
890593497e3c1ff747728a9c82092e20

SHA1
96b623ba7ee0670a7591244d9c85a622a0c98ef7

SHA256
5cd98b29045eea9bd9bf02d2aea73eaa3f8f71fe06e8ee51754c7b0413c1aa10

SHA512
d4178c0e92f685951be613554e6b4cd011fd0ea7afc8d9379d157877c23775a8ad56910a527849c436476e99ffa85f61bc7e711f7d9e6663e456768f251dd90e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jli12swa.4ug.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpFFA3.tmp.bat
Filesize
159B

MD5
3cd8136f94f4cad46435aa2d2d606e25

SHA1
443ad800530d0d4ba7bf239e7ea74afc2d5f5b41

SHA256
08ca74246c24a4d11772e9b90583b1cf15b2353fe7b5b0a72e3d0fe2bc28698c

SHA512
b9f5b87f46f6b2d06ecf89878daa4a16a2b7cb25d709e311411f8347a4316a60215217a08aaafc2affb29c90896ce7f956fb552c8207f3db88595f553f2b7d1e

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe
Filesize
41KB

MD5
cb09c9133f40c4903525fa5a7df4c405

SHA1
e8496990338d09a6b73d4808e3aada0f50cf758a

SHA256
ad335bba6ec965c12c17a0fb8ae86aa26beebca57e63fba662757a79f1d6df22

SHA512
be757f81deb1b8f43d51332d383ff829524ea94a54a732576b30bdba43a31eee2dfc9cd8ed5dce2cd06e191c307db2ddee687895a0de5ad6bc9709d167631b1f

Download Submit
memory/772-14-0x00000214C3E40000-0x00000214C3E62000-memory.dmp

Filesize
136KB

Download
memory/772-18-0x00007FFB9B590000-0x00007FFB9C051000-memory.dmp

Filesize
10.8MB

Download
memory/772-15-0x00007FFB9B590000-0x00007FFB9C051000-memory.dmp

Filesize
10.8MB

Download
memory/772-4-0x00007FFB9B590000-0x00007FFB9C051000-memory.dmp

Filesize
10.8MB

Download
memory/772-3-0x00007FFB9B590000-0x00007FFB9C051000-memory.dmp

Filesize
10.8MB

Download
memory/3812-0-0x00007FFB9B593000-0x00007FFB9B595000-memory.dmp

Filesize
8KB

Download
memory/3812-57-0x00007FFB9B593000-0x00007FFB9B595000-memory.dmp

Filesize
8KB

Download
memory/3812-58-0x00007FFB9B590000-0x00007FFB9C051000-memory.dmp

Filesize
10.8MB

Download
memory/3812-59-0x0000000000A60000-0x0000000000A6C000-memory.dmp

Filesize
48KB

Download
memory/3812-2-0x00007FFB9B590000-0x00007FFB9C051000-memory.dmp

Filesize
10.8MB

Download
memory/3812-113-0x00007FFB9B590000-0x00007FFB9C051000-memory.dmp

Filesize
10.8MB

Download
memory/3812-1-0x0000000000100000-0x0000000000110000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads