xworm | cd9850775a2bcc775a334e3893f9e5f994fdbd35d8d3715afebec5cd0415c74c

General

Target

XClient.exe
Size

76KB
MD5

20e1e5e3bbf0a01a30941cc12733c2da
SHA1

fced9d178bb03d5ed6bc2b0dc57befd9baed0e08
SHA256

cd9850775a2bcc775a334e3893f9e5f994fdbd35d8d3715afebec5cd0415c74c
SHA512

3642ca896b7fa00baf455d0764326ca6b8dab6d66bc743af8903c3937acfee7462b7964f98d340285edf3810c1f982a36f4911d7c74ab4ed8d5e8f4612feda12
SSDEEP

1536:5nstrkdd0P9rvnau2jsw84fP+uNu9b1KES9o//6U5VOHUQu5n+x:Kto+rCd2l9b1Kty5XOHU5+x

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

193.161.193.99:1194

Attributes

Install_directory
%AppData%
install_file
USB.exe
telegram
https://api.telegram.org/bot7704029346:AAHPre1lXQa0UfPCpOUXJZ9UXA9mFxvH4Gk/sendMessage?chat_id=7590668020

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/5116-1-0x00000000006B0000-0x00000000006CA000-memory.dmp	family_xworm
behavioral2/files/0x000200000001e748-57.dat	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
3460	powershell.exe
1820	powershell.exe
1104	powershell.exe
3632	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\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\security.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\security.lnk	XClient.exe

Executes dropped EXE 3 IoCs

pid	Process
4764	security
4880	security
4288	security

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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\security = "C:\\Users\\Admin\\AppData\\Roaming\\security"	XClient.exe

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4848	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
5116	XClient.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3460	powershell.exe
3460	powershell.exe
1820	powershell.exe
1820	powershell.exe
1104	powershell.exe
1104	powershell.exe
3632	powershell.exe
3632	powershell.exe
5116	XClient.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	5116	XClient.exe
Token: SeDebugPrivilege	3460	powershell.exe
Token: SeDebugPrivilege	1820	powershell.exe
Token: SeDebugPrivilege	1104	powershell.exe
Token: SeDebugPrivilege	3632	powershell.exe
Token: SeDebugPrivilege	5116	XClient.exe
Token: SeDebugPrivilege	4764	security
Token: SeDebugPrivilege	4880	security
Token: SeDebugPrivilege	4288	security

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5116	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 5116 wrote to memory of 3460	5116	XClient.exe	86
PID 5116 wrote to memory of 3460	5116	XClient.exe	86
PID 5116 wrote to memory of 1820	5116	XClient.exe	88
PID 5116 wrote to memory of 1820	5116	XClient.exe	88
PID 5116 wrote to memory of 1104	5116	XClient.exe	90
PID 5116 wrote to memory of 1104	5116	XClient.exe	90
PID 5116 wrote to memory of 3632	5116	XClient.exe	92
PID 5116 wrote to memory of 3632	5116	XClient.exe	92
PID 5116 wrote to memory of 4848	5116	XClient.exe	94
PID 5116 wrote to memory of 4848	5116	XClient.exe	94

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: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5116
- 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:3460
- 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:1820
- 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\security'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1104
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'security'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3632
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "security" /tr "C:\Users\Admin\AppData\Roaming\security"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4848

C:\Users\Admin\AppData\Roaming\security
C:\Users\Admin\AppData\Roaming\security
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4764

C:\Users\Admin\AppData\Roaming\security
C:\Users\Admin\AppData\Roaming\security
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4880

C:\Users\Admin\AppData\Roaming\security
C:\Users\Admin\AppData\Roaming\security
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4288

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

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
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\security.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
ba169f4dcbbf147fe78ef0061a95e83b

SHA1
92a571a6eef49fff666e0f62a3545bcd1cdcda67

SHA256
5ef1421e19fde4bc03cd825dd7d6c0e7863f85fd8f0aa4a4d4f8d555dc7606d1

SHA512
8d2e5e552210dcda684682538bc964fdd8a8ff5b24cc2cc8af813729f0202191f98eb42d38d2355df17ae620fe401aad6ceaedaed3b112fdacd32485a3a0c07c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_agnpths5.ryh.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\security

Filesize
76KB

MD5
20e1e5e3bbf0a01a30941cc12733c2da

SHA1
fced9d178bb03d5ed6bc2b0dc57befd9baed0e08

SHA256
cd9850775a2bcc775a334e3893f9e5f994fdbd35d8d3715afebec5cd0415c74c

SHA512
3642ca896b7fa00baf455d0764326ca6b8dab6d66bc743af8903c3937acfee7462b7964f98d340285edf3810c1f982a36f4911d7c74ab4ed8d5e8f4612feda12

Download Submit
memory/3460-12-0x00007FF976220000-0x00007FF976CE1000-memory.dmp

Filesize
10.8MB

Download
memory/3460-17-0x00007FF976220000-0x00007FF976CE1000-memory.dmp

Filesize
10.8MB

Download
memory/3460-14-0x00007FF976220000-0x00007FF976CE1000-memory.dmp

Filesize
10.8MB

Download
memory/3460-13-0x00007FF976220000-0x00007FF976CE1000-memory.dmp

Filesize
10.8MB

Download
memory/3460-11-0x0000022F517D0000-0x0000022F517F2000-memory.dmp

Filesize
136KB

Download
memory/5116-0-0x00007FF976223000-0x00007FF976225000-memory.dmp

Filesize
8KB

Download
memory/5116-55-0x00007FF976220000-0x00007FF976CE1000-memory.dmp

Filesize
10.8MB

Download
memory/5116-56-0x00007FF976223000-0x00007FF976225000-memory.dmp

Filesize
8KB

Download
memory/5116-60-0x00007FF976220000-0x00007FF976CE1000-memory.dmp

Filesize
10.8MB

Download
memory/5116-1-0x00000000006B0000-0x00000000006CA000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads