xworm | 40751536a5f6d6a98f181c1ccd19c3dcbd51a194d6ec282ab9141a3ee599c4a5

General

Target

XClient.exe
Size

80KB
MD5

c2c1ba206377942b6b647f39d03904b9
SHA1

d0b9e4fb55ffdf2cb5a78b7e881d9ce641d9c17b
SHA256

40751536a5f6d6a98f181c1ccd19c3dcbd51a194d6ec282ab9141a3ee599c4a5
SHA512

83d885cd216d9e2a79e05b4270b85d1503f579548e4733ff5ae53bc1513a184345072f64216ad9445ebc2fa57af55b14277a845b1dfde152622fafbb91c07f05
SSDEEP

1536:RBeQHCHtsCRq1GS8+2KWUGPh8XGAWptciXuCx/sw9lp/bXK0apO5O6u7rsOE1aSE:neRNsCRq1GS8+2DGhP8V/9Xb6BpJYOEY

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
System.exe
pastebin_url
https://pastebin.com/raw/erNS5DCf
telegram
https://api.telegram.org/bot6322711372:AAGbIfXFhlNS1SFeiUdz8wnaxv2bCiayqnI/sendMessage?chat_id=1098594855

Signatures

Detect Xworm Payload 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1928-0-0x0000000000AD0000-0x0000000000AEA000-memory.dmp	family_xworm
C:\Users\Admin\AppData\Roaming\System.exe	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
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-1-5-21-355664440-2199602304-1223909400-1000\Control Panel\International\Geo\Nation XClient.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-355664440-2199602304-1223909400-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

Processes:

XClient.exe

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

Executes dropped EXE 3 IoCs

Processes:

System.exeSystem.exeSystem.exe

pid process

3692 System.exe
1532 System.exe
3200 System.exe

pid	process
3692	System.exe
1532	System.exe
3200	System.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-1-5-21-355664440-2199602304-1223909400-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\System = "C:\\Users\\Admin\\AppData\\Roaming\\System.exe"	XClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 6 IoCs

Web Service
T1102

Processes:

flow ioc

121 4.tcp.eu.ngrok.io
153 4.tcp.eu.ngrok.io
183 4.tcp.eu.ngrok.io
39 pastebin.com
40 pastebin.com
63 4.tcp.eu.ngrok.io
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

25 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

1428 schtasks.exe

flow	ioc
121	4.tcp.eu.ngrok.io
153	4.tcp.eu.ngrok.io
183	4.tcp.eu.ngrok.io
39	pastebin.com
40	pastebin.com
63	4.tcp.eu.ngrok.io

flow	ioc
25	ip-api.com

pid	process
1428	schtasks.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exeXClient.exe

pid	process
2804	powershell.exe
2804	powershell.exe
1956	powershell.exe
1956	powershell.exe
1956	powershell.exe
2772	powershell.exe
2772	powershell.exe
2772	powershell.exe
3404	powershell.exe
3404	powershell.exe
3404	powershell.exe
1928	XClient.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

Processes:

XClient.exepowershell.exepowershell.exepowershell.exepowershell.exeSystem.exeSystem.exeSystem.exe

description	pid	process
Token: SeDebugPrivilege	1928	XClient.exe
Token: SeDebugPrivilege	2804	powershell.exe
Token: SeDebugPrivilege	1956	powershell.exe
Token: SeDebugPrivilege	2772	powershell.exe
Token: SeDebugPrivilege	3404	powershell.exe
Token: SeDebugPrivilege	1928	XClient.exe
Token: SeDebugPrivilege	3692	System.exe
Token: SeDebugPrivilege	1532	System.exe
Token: SeDebugPrivilege	3200	System.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

XClient.exe

pid process

1928 XClient.exe

pid	process
1928	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

XClient.exe

description	pid	process	target process
PID 1928 wrote to memory of 2804	1928	XClient.exe	powershell.exe
PID 1928 wrote to memory of 2804	1928	XClient.exe	powershell.exe
PID 1928 wrote to memory of 1956	1928	XClient.exe	powershell.exe
PID 1928 wrote to memory of 1956	1928	XClient.exe	powershell.exe
PID 1928 wrote to memory of 2772	1928	XClient.exe	powershell.exe
PID 1928 wrote to memory of 2772	1928	XClient.exe	powershell.exe
PID 1928 wrote to memory of 3404	1928	XClient.exe	powershell.exe
PID 1928 wrote to memory of 3404	1928	XClient.exe	powershell.exe
PID 1928 wrote to memory of 1428	1928	XClient.exe	schtasks.exe
PID 1928 wrote to memory of 1428	1928	XClient.exe	schtasks.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 use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1928

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⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2804

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1956

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\System.exe'
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2772

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'System.exe'
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3404

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "System" /tr "C:\Users\Admin\AppData\Roaming\System.exe"
2⤵
- Creates scheduled task(s)
PID:1428

C:\Users\Admin\AppData\Roaming\System.exe
C:\Users\Admin\AppData\Roaming\System.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3692

C:\Users\Admin\AppData\Roaming\System.exe
C:\Users\Admin\AppData\Roaming\System.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1532

C:\Users\Admin\AppData\Roaming\System.exe
C:\Users\Admin\AppData\Roaming\System.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3200

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1

T1053

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\System.exe.log
Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
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
eb1ad317bd25b55b2bbdce8a28a74a94

SHA1
98a3978be4d10d62e7411946474579ee5bdc5ea6

SHA256
9e94e7c9ac6134ee30e79498558aa1a5a1ac79a643666c3f8922eed215dd3a98

SHA512
d011f266c0240d84470c0f9577cd9e4927309bd19bb38570ca9704ed8e1d159f9bea982a59d3eefef72ce7a10bd81208b82e88ef57c7af587f7437a89769adc0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_h40pulfb.muz.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\System.exe
Filesize
80KB

MD5
c2c1ba206377942b6b647f39d03904b9

SHA1
d0b9e4fb55ffdf2cb5a78b7e881d9ce641d9c17b

SHA256
40751536a5f6d6a98f181c1ccd19c3dcbd51a194d6ec282ab9141a3ee599c4a5

SHA512
83d885cd216d9e2a79e05b4270b85d1503f579548e4733ff5ae53bc1513a184345072f64216ad9445ebc2fa57af55b14277a845b1dfde152622fafbb91c07f05

Download Submit
memory/1532-82-0x00007FFDB7AC0000-0x00007FFDB8581000-memory.dmp

Filesize
10.8MB

Download
memory/1532-81-0x00007FFDB7AC0000-0x00007FFDB8581000-memory.dmp

Filesize
10.8MB

Download
memory/1928-72-0x0000000002C00000-0x0000000002C10000-memory.dmp

Filesize
64KB

Download
memory/1928-64-0x00007FFDB7AC0000-0x00007FFDB8581000-memory.dmp

Filesize
10.8MB

Download
memory/1928-2-0x0000000002C00000-0x0000000002C10000-memory.dmp

Filesize
64KB

Download
memory/1928-1-0x00007FFDB7AC0000-0x00007FFDB8581000-memory.dmp

Filesize
10.8MB

Download
memory/1928-0-0x0000000000AD0000-0x0000000000AEA000-memory.dmp

Filesize
104KB

Download
memory/1956-33-0x000001F57B2D0000-0x000001F57B2E0000-memory.dmp

Filesize
64KB

Download
memory/1956-32-0x000001F57B2D0000-0x000001F57B2E0000-memory.dmp

Filesize
64KB

Download
memory/1956-30-0x00007FFDB7AC0000-0x00007FFDB8581000-memory.dmp

Filesize
10.8MB

Download
memory/1956-35-0x00007FFDB7AC0000-0x00007FFDB8581000-memory.dmp

Filesize
10.8MB

Download
memory/2772-45-0x00007FFDB7AC0000-0x00007FFDB8581000-memory.dmp

Filesize
10.8MB

Download
memory/2772-48-0x000002127BEF0000-0x000002127BF00000-memory.dmp

Filesize
64KB

Download
memory/2772-50-0x000002127C560000-0x000002127C77C000-memory.dmp

Filesize
2.1MB

Download
memory/2772-51-0x00007FFDB7AC0000-0x00007FFDB8581000-memory.dmp

Filesize
10.8MB

Download
memory/2772-47-0x000002127BEF0000-0x000002127BF00000-memory.dmp

Filesize
64KB

Download
memory/2804-15-0x0000024A5EBD0000-0x0000024A5EBE0000-memory.dmp

Filesize
64KB

Download
memory/2804-3-0x00007FFDB7AC0000-0x00007FFDB8581000-memory.dmp

Filesize
10.8MB

Download
memory/2804-19-0x00007FFDB7AC0000-0x00007FFDB8581000-memory.dmp

Filesize
10.8MB

Download
memory/2804-11-0x0000024A46550000-0x0000024A46572000-memory.dmp

Filesize
136KB

Download
memory/2804-18-0x0000024A5ED50000-0x0000024A5EF6C000-memory.dmp

Filesize
2.1MB

Download
memory/2804-9-0x0000024A5EBD0000-0x0000024A5EBE0000-memory.dmp

Filesize
64KB

Download
memory/3200-84-0x00007FFDB7AC0000-0x00007FFDB8581000-memory.dmp

Filesize
10.8MB

Download
memory/3404-67-0x00007FFDB7AC0000-0x00007FFDB8581000-memory.dmp

Filesize
10.8MB

Download
memory/3404-66-0x000001E1F2BB0000-0x000001E1F2DCC000-memory.dmp

Filesize
2.1MB

Download
memory/3404-62-0x000001E1F2BA0000-0x000001E1F2BB0000-memory.dmp

Filesize
64KB

Download
memory/3404-61-0x00007FFDB7AC0000-0x00007FFDB8581000-memory.dmp

Filesize
10.8MB

Download
memory/3692-77-0x00007FFDB7AC0000-0x00007FFDB8581000-memory.dmp

Filesize
10.8MB

Download
memory/3692-75-0x00007FFDB7AC0000-0x00007FFDB8581000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads