xworm | e3d7084ab0b41ea0eb67688827a1fff7154d8e0923eb575be1873cac0151837b

General

Target

ValorLoader.exe
Size

177KB
MD5

7ae6ff5995e374d09ba607addf5490cb
SHA1

08a50366bfd91f0027b1c0e7d8f9f14bd738484c
SHA256

e3d7084ab0b41ea0eb67688827a1fff7154d8e0923eb575be1873cac0151837b
SHA512

90df27da662582374e261e688747bc94959faa554a3b759871be36b71cdae485d6babc9a240e1afdd597e30394ffb155eee7f483432742f7e55e43ff743c141c
SSDEEP

1536:O1nDxGg9vKwCK6bH/7DdQ9pZnDobRpEj/s62vTrlwkS+OpISrAUEI:OZVGgNCK6xQLZn0bRphLRpOeSsUEI

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

y-lbs.gl.at.ply.gg:41978

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/2252-1-0x0000000000C90000-0x0000000000CC2000-memory.dmp	family_xworm
behavioral1/files/0x0011000000023308-58.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
1468	powershell.exe
4048	powershell.exe
1604	powershell.exe
3164	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-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	ValorLoader.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
3428	System User
4932	System User
3380	System User

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-1-5-21-2412658365-3084825385-3340777666-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\System User = "C:\\Users\\Admin\\AppData\\Roaming\\System User"	ValorLoader.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
17	ip-api.com

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
5044	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1468	powershell.exe
1468	powershell.exe
4048	powershell.exe
4048	powershell.exe
1604	powershell.exe
1604	powershell.exe
3164	powershell.exe
3164	powershell.exe
2252	ValorLoader.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	2252	ValorLoader.exe
Token: SeDebugPrivilege	1468	powershell.exe
Token: SeDebugPrivilege	4048	powershell.exe
Token: SeDebugPrivilege	1604	powershell.exe
Token: SeDebugPrivilege	3164	powershell.exe
Token: SeDebugPrivilege	2252	ValorLoader.exe
Token: SeDebugPrivilege	3428	System User
Token: SeDebugPrivilege	4932	System User
Token: SeDebugPrivilege	3380	System User

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2252	ValorLoader.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2252 wrote to memory of 1468	2252	ValorLoader.exe	91
PID 2252 wrote to memory of 1468	2252	ValorLoader.exe	91
PID 2252 wrote to memory of 4048	2252	ValorLoader.exe	93
PID 2252 wrote to memory of 4048	2252	ValorLoader.exe	93
PID 2252 wrote to memory of 1604	2252	ValorLoader.exe	95
PID 2252 wrote to memory of 1604	2252	ValorLoader.exe	95
PID 2252 wrote to memory of 3164	2252	ValorLoader.exe	97
PID 2252 wrote to memory of 3164	2252	ValorLoader.exe	97
PID 2252 wrote to memory of 5044	2252	ValorLoader.exe	100
PID 2252 wrote to memory of 5044	2252	ValorLoader.exe	100

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\ValorLoader.exe
"C:\Users\Admin\AppData\Local\Temp\ValorLoader.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:2252
- 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\ValorLoader.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1468
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'ValorLoader.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4048
- 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 User'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1604
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'System User'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3164
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "System User" /tr "C:\Users\Admin\AppData\Roaming\System User"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5044

C:\Users\Admin\AppData\Roaming\System User
"C:\Users\Admin\AppData\Roaming\System User"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3428

C:\Users\Admin\AppData\Roaming\System User
"C:\Users\Admin\AppData\Roaming\System User"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4932

C:\Users\Admin\AppData\Roaming\System User
"C:\Users\Admin\AppData\Roaming\System User"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3380

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\System User.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
cadef9abd087803c630df65264a6c81c

SHA1
babbf3636c347c8727c35f3eef2ee643dbcc4bd2

SHA256
cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

SHA512
7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

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

Filesize
944B

MD5
faccceb72380700a8ccbc808e1e2920b

SHA1
85b3447869d3df2e366cb1043a88d9f3345ebf69

SHA256
c3564d0d3149f4c0938943080551819ded3704765b865429a3a9e804f3f301cd

SHA512
daa25b7d4a986967e6e596bf20ebe81746d1357179d72a3722cd59e5037b614f310544b80ad4aa1df147f95f354af7ba87c8f1f1c9eb1affc73c1fb70b6e5aed

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_itj3kn2g.end.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\System User

Filesize
177KB

MD5
7ae6ff5995e374d09ba607addf5490cb

SHA1
08a50366bfd91f0027b1c0e7d8f9f14bd738484c

SHA256
e3d7084ab0b41ea0eb67688827a1fff7154d8e0923eb575be1873cac0151837b

SHA512
90df27da662582374e261e688747bc94959faa554a3b759871be36b71cdae485d6babc9a240e1afdd597e30394ffb155eee7f483432742f7e55e43ff743c141c

Download Submit
memory/1468-4-0x00007FFD06660000-0x00007FFD07121000-memory.dmp

Filesize
10.8MB

Download
memory/1468-18-0x00007FFD06660000-0x00007FFD07121000-memory.dmp

Filesize
10.8MB

Download
memory/1468-15-0x00007FFD06660000-0x00007FFD07121000-memory.dmp

Filesize
10.8MB

Download
memory/1468-10-0x00000220E22A0000-0x00000220E22C2000-memory.dmp

Filesize
136KB

Download
memory/1468-3-0x00007FFD06660000-0x00007FFD07121000-memory.dmp

Filesize
10.8MB

Download
memory/2252-0-0x00007FFD06663000-0x00007FFD06665000-memory.dmp

Filesize
8KB

Download
memory/2252-56-0x00007FFD06663000-0x00007FFD06665000-memory.dmp

Filesize
8KB

Download
memory/2252-57-0x00007FFD06660000-0x00007FFD07121000-memory.dmp

Filesize
10.8MB

Download
memory/2252-2-0x00007FFD06660000-0x00007FFD07121000-memory.dmp

Filesize
10.8MB

Download
memory/2252-1-0x0000000000C90000-0x0000000000CC2000-memory.dmp

Filesize
200KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads