xworm | 056ccd7c1f4e858e96d11bd4839349d343a267797b6ad8ccb65b8e2f4744d126

General

Target

XClient.exe
Size

64KB
MD5

693f727cda4cf4da3f03338a64a2dd22
SHA1

53210d0cb2406e7f227610f71c1df22be80ab3a6
SHA256

056ccd7c1f4e858e96d11bd4839349d343a267797b6ad8ccb65b8e2f4744d126
SHA512

cbb8ce1671d001aba856a75575b0b8d9eb47caa80b4883244d1dd8f0ab9aa13c02e71eb20885b96c91859483795b10ccd66d6854d8b14c67c5e9d474c899e583
SSDEEP

1536:OZZ0BWdi6BhueW6HnbA+Ym+61Oo8WAgDeogGG:OZXupGbvxOo8//GG

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:30717

window-prize.gl.at.ply.gg:30717

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/4200-1-0x0000000000F90000-0x0000000000FA6000-memory.dmp	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
3500	powershell.exe
3064	powershell.exe
3876	powershell.exe
3276	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-1-5-21-2437139445-1151884604-3026847218-1000\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\XClient.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClient.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
13	ip-api.com

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3628	timeout.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3276	powershell.exe
3276	powershell.exe
3500	powershell.exe
3500	powershell.exe
3064	powershell.exe
3064	powershell.exe
3876	powershell.exe
3876	powershell.exe
4200	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4200	XClient.exe
Token: SeDebugPrivilege	3276	powershell.exe
Token: SeDebugPrivilege	3500	powershell.exe
Token: SeDebugPrivilege	3064	powershell.exe
Token: SeDebugPrivilege	3876	powershell.exe
Token: SeDebugPrivilege	4200	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4200	XClient.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4200 wrote to memory of 3276	4200	XClient.exe	87
PID 4200 wrote to memory of 3276	4200	XClient.exe	87
PID 4200 wrote to memory of 3500	4200	XClient.exe	89
PID 4200 wrote to memory of 3500	4200	XClient.exe	89
PID 4200 wrote to memory of 3064	4200	XClient.exe	93
PID 4200 wrote to memory of 3064	4200	XClient.exe	93
PID 4200 wrote to memory of 3876	4200	XClient.exe	96
PID 4200 wrote to memory of 3876	4200	XClient.exe	96
PID 4200 wrote to memory of 4112	4200	XClient.exe	109
PID 4200 wrote to memory of 4112	4200	XClient.exe	109
PID 4112 wrote to memory of 3628	4112	cmd.exe	111
PID 4112 wrote to memory of 3628	4112	cmd.exe	111

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4200
- 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:3276
- 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:3500
- 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⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3064
- 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:3876
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp25.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4112
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3628

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

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\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
2e907f77659a6601fcc408274894da2e

SHA1
9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

SHA256
385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

SHA512
34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

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

Filesize
944B

MD5
e5663972c1caaba7088048911c758bf3

SHA1
3462dea0f9c2c16a9c3afdaef8bbb1f753c1c198

SHA256
9f7f29a4696876cadca3f14d7e43f9ede0c97fd64be3f5d94bda49a91b6a419e

SHA512
ff4e72c46cf083de62baa2ce2661555dd91b5f144294015f7b262fd4500cb67fe80e1871a82da63b607e3e9cef401f4b73c587bf1134637881ecad51aad1eddc

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

Filesize
944B

MD5
fd98baf5a9c30d41317663898985593b

SHA1
ea300b99f723d2429d75a6c40e0838bf60f17aad

SHA256
9d97a5bbc88fdcceac25f293383f7e5ce242675460ffbfb2ee9090870c034e96

SHA512
bf4dbbd671b5d7afb326622a7c781f150860294d3dba7160330046c258c84a15981c70e50d84dc7faaa7cc8b8c90bf8df818b3f2d3806a8a3671dfe5e38fe7b0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_he5f1tis.nq3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp25.tmp.bat

Filesize
157B

MD5
324d791e15caf31820bef7bb9c1a478a

SHA1
cdde109e3b331404541e571b9d99aeb29b9a47f7

SHA256
d3b7e8d4f6cd6de251fa2ab3d95bf8f36589792ea0858b50c039d0ef310fd748

SHA512
ab266f43ee9697df7917259c438010bb88bc5040fb827bac921a1d223e03e9bccc0ec2c0a0ffef65a712434b939e8e8880ca1c801058079c10e9836bd5fcd687

Download Submit
memory/3276-4-0x00007FFD4F7E0000-0x00007FFD502A1000-memory.dmp

Filesize
10.8MB

Download
memory/3276-11-0x000001FE7F4A0000-0x000001FE7F4C2000-memory.dmp

Filesize
136KB

Download
memory/3276-18-0x00007FFD4F7E0000-0x00007FFD502A1000-memory.dmp

Filesize
10.8MB

Download
memory/3276-5-0x00007FFD4F7E0000-0x00007FFD502A1000-memory.dmp

Filesize
10.8MB

Download
memory/3276-3-0x00007FFD4F7E0000-0x00007FFD502A1000-memory.dmp

Filesize
10.8MB

Download
memory/4200-0-0x00007FFD4F7E3000-0x00007FFD4F7E5000-memory.dmp

Filesize
8KB

Download
memory/4200-2-0x00007FFD4F7E0000-0x00007FFD502A1000-memory.dmp

Filesize
10.8MB

Download
memory/4200-57-0x00007FFD4F7E0000-0x00007FFD502A1000-memory.dmp

Filesize
10.8MB

Download
memory/4200-1-0x0000000000F90000-0x0000000000FA6000-memory.dmp

Filesize
88KB

Download
memory/4200-66-0x00007FFD4F7E0000-0x00007FFD502A1000-memory.dmp

Filesize
10.8MB

Download

Analysis

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