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/4292-0-0x00000000003A0000-0x00000000003CC000-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

22 pastebin.com
23 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

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

System Information Discovery
T1082

flow	ioc
22	pastebin.com
23	pastebin.com

flow	ioc
6	ip-api.com

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exeXClient.exe

pid	process
3948	powershell.exe
3948	powershell.exe
820	powershell.exe
820	powershell.exe
824	powershell.exe
824	powershell.exe
3728	powershell.exe
3728	powershell.exe
4292	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

XClient.exepowershell.exepowershell.exepowershell.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	4292	XClient.exe
Token: SeDebugPrivilege	3948	powershell.exe
Token: SeDebugPrivilege	820	powershell.exe
Token: SeDebugPrivilege	824	powershell.exe
Token: SeDebugPrivilege	3728	powershell.exe
Token: SeDebugPrivilege	4292	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

XClient.exe

pid process

4292 XClient.exe

pid	process
4292	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

XClient.exe

description	pid	process	target process
PID 4292 wrote to memory of 3948	4292	XClient.exe	powershell.exe
PID 4292 wrote to memory of 3948	4292	XClient.exe	powershell.exe
PID 4292 wrote to memory of 820	4292	XClient.exe	powershell.exe
PID 4292 wrote to memory of 820	4292	XClient.exe	powershell.exe
PID 4292 wrote to memory of 824	4292	XClient.exe	powershell.exe
PID 4292 wrote to memory of 824	4292	XClient.exe	powershell.exe
PID 4292 wrote to memory of 3728	4292	XClient.exe	powershell.exe
PID 4292 wrote to memory of 3728	4292	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:4292
- 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:3948
- 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:820
- 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:824
- 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:3728

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=3720 --field-trial-handle=2252,i,16504368816373493055,9578615028378602855,262144 --variations-seed-version /prefetch:8
1⤵
PID:2224

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
4822327741294722927d46423be14304

SHA1
3049826ae49ca304bd4a84a21b8ccb6a9499c39e

SHA256
b6ed5510a3376ce391d154b219c2d70cebb62e6fdef97022ad2bc305c5137a74

SHA512
c7607f4bab5688baaeab93bc92a2546d60f9f77b52614ad718133e4313674ae3bdbd497282220c399b2cd97c45a09adbecf1997ac82cab9e221129fa3ac83c8b

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

Filesize
944B

MD5
2f154a03d8e551f9504a1518466e078b

SHA1
0e86b7b383076172274015e3b0b5c63cccc1dfcf

SHA256
9e4b3b8ae2ff2beb2a1849ef05455c6e0542e9227267decbcd1b96a48f7227be

SHA512
7f1fba4d131b3ec4f1bbe204e29516bcd2ea111afe4b03da2f5eaf25b3bfbea08808192005020eb7d706a9e971fdd8ebe068f883f72c6759926ef58ae9db47e4

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3iuiwfoc.ape.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3948-4-0x000002BE44DE0000-0x000002BE44DF0000-memory.dmp

Filesize
64KB

Download
memory/3948-5-0x000002BE44DE0000-0x000002BE44DF0000-memory.dmp

Filesize
64KB

Download
memory/3948-15-0x000002BE44D50000-0x000002BE44D72000-memory.dmp

Filesize
136KB

Download
memory/3948-16-0x000002BE44DE0000-0x000002BE44DF0000-memory.dmp

Filesize
64KB

Download
memory/3948-19-0x00007FFC4E980000-0x00007FFC4F441000-memory.dmp

Filesize
10.8MB

Download
memory/3948-3-0x00007FFC4E980000-0x00007FFC4F441000-memory.dmp

Filesize
10.8MB

Download
memory/4292-0-0x00000000003A0000-0x00000000003CC000-memory.dmp

Filesize
176KB

Download
memory/4292-2-0x0000000002700000-0x0000000002710000-memory.dmp

Filesize
64KB

Download
memory/4292-1-0x00007FFC4E980000-0x00007FFC4F441000-memory.dmp

Filesize
10.8MB

Download
memory/4292-58-0x00007FFC4E980000-0x00007FFC4F441000-memory.dmp

Filesize
10.8MB

Download
memory/4292-59-0x0000000002700000-0x0000000002710000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads