xworm | 250faa1e494e594e8faad0cebcd8d2b1d63f9bc5ddfd8ac6f143a98f8ed9980e

General

Target

XClient.exe
Size

153KB
MD5

1b8820d52554249471ca92c6db6d7e73
SHA1

8b72f08f4c07c2011d42bcdb3cb8299ddceaa16b
SHA256

250faa1e494e594e8faad0cebcd8d2b1d63f9bc5ddfd8ac6f143a98f8ed9980e
SHA512

bfd0864ca829913b66739fe3194e606e7795e8a55ec1da57b79f273f318795d9d41bd6881e5f9e418d4a1fc7481a64ed5728f171a956ebaa2aeb6aaa43208df3
SSDEEP

1536:6UEv+qFIUkzEabbECePsbgoggTLcGu4f069liHbOBPBbyVspJxqmyVttdGFQeOPu:mHpkzFbwCekbgL2+OBPBmVIrqmyBer

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
XClient.exe
pastebin_url
https://pastebin.com/raw/PG3MaVGP

Signatures

Detect Xworm Payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1804-0-0x0000000000810000-0x000000000083C000-memory.dmp	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-1-5-21-3808065738-1666277613-1125846146-1000\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\XClient.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClient.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-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.exe

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

Web Service
T1102

Processes:

flow ioc

16 pastebin.com
14 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

7 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
16	pastebin.com
14	pastebin.com

flow	ioc
7	ip-api.com

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exeXClient.exe

pid	process
4348	powershell.exe
4348	powershell.exe
3816	powershell.exe
3816	powershell.exe
436	powershell.exe
436	powershell.exe
3280	powershell.exe
3280	powershell.exe
1804	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

XClient.exepowershell.exepowershell.exepowershell.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	1804	XClient.exe
Token: SeDebugPrivilege	4348	powershell.exe
Token: SeDebugPrivilege	3816	powershell.exe
Token: SeDebugPrivilege	436	powershell.exe
Token: SeDebugPrivilege	3280	powershell.exe
Token: SeDebugPrivilege	1804	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

XClient.exe

pid process

1804 XClient.exe

pid	process
1804	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

XClient.exe

description	pid	process	target process
PID 1804 wrote to memory of 4348	1804	XClient.exe	powershell.exe
PID 1804 wrote to memory of 4348	1804	XClient.exe	powershell.exe
PID 1804 wrote to memory of 3816	1804	XClient.exe	powershell.exe
PID 1804 wrote to memory of 3816	1804	XClient.exe	powershell.exe
PID 1804 wrote to memory of 436	1804	XClient.exe	powershell.exe
PID 1804 wrote to memory of 436	1804	XClient.exe	powershell.exe
PID 1804 wrote to memory of 3280	1804	XClient.exe	powershell.exe
PID 1804 wrote to memory of 3280	1804	XClient.exe	powershell.exe

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:1804

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:4348

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:3816

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.exe'
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:436

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:3280

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1316 --field-trial-handle=2280,i,11703952675008463361,17436195144517971517,262144 --variations-seed-version /prefetch:8
1⤵
PID:1196

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

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
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
944B

MD5
0d8abf9638c74e2459427f0738f597a0

SHA1
7f0d7f08e3bab3736388f3db7e5cb5beb726ef4d

SHA256
cad3af71b0b153675d87318a3fd44524d95a1b158549e5dd94d64795972d9382

SHA512
52e226e566b0b3b3800538c452deccde78ca22fbc47139c34e9f35fc49c2549b44ac4e5c5debc0692251244757af6f2ab447cad4c28fa6a2711661c472ae7b30

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

Filesize
944B

MD5
2e6ff4783ff9a031d6c7f56fa4addc63

SHA1
508812e940fc705865458060d0fb487301422baf

SHA256
04362c7f6383fb3e6e53abb076aeca79d84062dd10697caf1457f330e90f17a5

SHA512
075aa56e80e90417878b1f847acdfb89e869d5866d87ca7182efc0efdc48ca3ee16bd4b00afcd99e5dd1c24be2a3165fb612bcf5ed58ed4af0b47c44351f30b2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fj0ghzmo.o5c.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1804-1-0x00007FFE6DE90000-0x00007FFE6E951000-memory.dmp

Filesize
10.8MB

Download
memory/1804-2-0x000000001B6A0000-0x000000001B6B0000-memory.dmp

Filesize
64KB

Download
memory/1804-60-0x000000001B6A0000-0x000000001B6B0000-memory.dmp

Filesize
64KB

Download
memory/1804-0-0x0000000000810000-0x000000000083C000-memory.dmp

Filesize
176KB

Download
memory/1804-53-0x00007FFE6DE90000-0x00007FFE6E951000-memory.dmp

Filesize
10.8MB

Download
memory/4348-5-0x00000203DD860000-0x00000203DD870000-memory.dmp

Filesize
64KB

Download
memory/4348-20-0x00007FFE6DE90000-0x00007FFE6E951000-memory.dmp

Filesize
10.8MB

Download
memory/4348-17-0x00000203DD860000-0x00000203DD870000-memory.dmp

Filesize
64KB

Download
memory/4348-16-0x00000203DD860000-0x00000203DD870000-memory.dmp

Filesize
64KB

Download
memory/4348-11-0x00000203DD8A0000-0x00000203DD8C2000-memory.dmp

Filesize
136KB

Download
memory/4348-4-0x00000203DD860000-0x00000203DD870000-memory.dmp

Filesize
64KB

Download
memory/4348-3-0x00007FFE6DE90000-0x00007FFE6E951000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads