xworm | 35ba562b6c3e8b92a791db5a6341150428fea42222f82abf40f120a81b6d7c58

General

Target

SolaraBootstapper.exe
Size

65KB
MD5

6e7a02155f6abafcdaf3203ee8407a31
SHA1

6379c4b9d9398d6faf7fc5e40c45fd86d94e9d3b
SHA256

4d827a102b732bf26cb1624030434a9427a9fc44cd0d787f4a8488bd3947a820
SHA512

7ce060561f541fd49a7a9bfe2ae6e0f5f5880447618660577a468e345115f0461e8b5277f009dd15cb9164f3fcbe83656d936b7cd243071495c69570b0329964
SSDEEP

1536:hs9sLzLCyOgNbco4jvLl2p16pg8rOlaHqd:0vgNbc5vLlWn8rOlaKd

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

loss-winners.gl.at.ply.gg:61007

Attributes

Install_directory
%AppData%
install_file
Expensive 3.1.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3140-0-0x0000000000A40000-0x0000000000A56000-memory.dmp	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
1408	powershell.exe
2072	powershell.exe
628	powershell.exe
4784	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-1-5-21-1705699165-553239100-4129523827-1000\Control Panel\International\Geo\Nation	SolaraBootstapper.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Expensive 3.1.lnk	SolaraBootstapper.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Expensive 3.1.lnk	SolaraBootstapper.exe

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-1-5-21-1705699165-553239100-4129523827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Expensive 3.1 = "C:\\Users\\Admin\\AppData\\Roaming\\Expensive 3.1.exe"	SolaraBootstapper.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1408	powershell.exe
1408	powershell.exe
2072	powershell.exe
2072	powershell.exe
628	powershell.exe
628	powershell.exe
4784	powershell.exe
4784	powershell.exe
3140	SolaraBootstapper.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3140	SolaraBootstapper.exe
Token: SeDebugPrivilege	1408	powershell.exe
Token: SeDebugPrivilege	2072	powershell.exe
Token: SeDebugPrivilege	628	powershell.exe
Token: SeDebugPrivilege	4784	powershell.exe
Token: SeDebugPrivilege	3140	SolaraBootstapper.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3140	SolaraBootstapper.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3140 wrote to memory of 1408	3140	SolaraBootstapper.exe	91
PID 3140 wrote to memory of 1408	3140	SolaraBootstapper.exe	91
PID 3140 wrote to memory of 2072	3140	SolaraBootstapper.exe	94
PID 3140 wrote to memory of 2072	3140	SolaraBootstapper.exe	94
PID 3140 wrote to memory of 628	3140	SolaraBootstapper.exe	96
PID 3140 wrote to memory of 628	3140	SolaraBootstapper.exe	96
PID 3140 wrote to memory of 4784	3140	SolaraBootstapper.exe	99
PID 3140 wrote to memory of 4784	3140	SolaraBootstapper.exe	99

C:\Users\Admin\AppData\Local\Temp\SolaraBootstapper.exe
"C:\Users\Admin\AppData\Local\Temp\SolaraBootstapper.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:3140
- 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\SolaraBootstapper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1408
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'SolaraBootstapper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2072
- 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\Expensive 3.1.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:628
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Expensive 3.1.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4784

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

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

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
e243a38635ff9a06c87c2a61a2200656

SHA1
ecd95ed5bf1a9fbe96a8448fc2814a0210fa2afc

SHA256
af5782703f3f2d5a29fb313dae6680a64134db26064d4a321a3f23b75f6ca00f

SHA512
4418957a1b10eee44cf270c81816ae707352411c4f5ac14b6b61ab537c91480e24e0a0a2c276a6291081b4984c123cf673a45dcedb0ceeef682054ba0fc19cb4

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

Filesize
944B

MD5
67e8893616f805af2411e2f4a1411b2a

SHA1
39bf1e1a0ddf46ce7c136972120f512d92827dcd

SHA256
ca0dfe104c1bf27f7e01999fcdabc16c6400c3da937c832c26bdbca322381d31

SHA512
164e911a9935e75c8be1a6ec3d31199a16ba2a1064da6c09d771b2a38dd7fddd142301ef55d67d90f306d3a454a1ce7b72e129ea42e44500b9b8c623a8d98b4d

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

Filesize
944B

MD5
735388b98281cec7d063b1b470c13632

SHA1
7536ce1c5f3732fac491d7038e24124551c4290a

SHA256
843fced254477f5ad803cc98e853d7ab674852d5e94bc174497691b736d49e69

SHA512
30244c596f4c3cc0194186a210170f04985b77fc90f10cff0a2fbd07e079944e5f8c9998759219363033c450b6a4093ad1b3d75e0a0fae1aa6208a61a88a9717

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vemrf5u4.1up.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1408-10-0x0000020DBF2C0000-0x0000020DBF2E2000-memory.dmp

Filesize
136KB

Download
memory/1408-14-0x00007FFF81570000-0x00007FFF82031000-memory.dmp

Filesize
10.8MB

Download
memory/1408-17-0x00007FFF81570000-0x00007FFF82031000-memory.dmp

Filesize
10.8MB

Download
memory/1408-13-0x00007FFF81570000-0x00007FFF82031000-memory.dmp

Filesize
10.8MB

Download
memory/1408-12-0x00007FFF81570000-0x00007FFF82031000-memory.dmp

Filesize
10.8MB

Download
memory/3140-0-0x0000000000A40000-0x0000000000A56000-memory.dmp

Filesize
88KB

Download
memory/3140-1-0x00007FFF81573000-0x00007FFF81575000-memory.dmp

Filesize
8KB

Download
memory/3140-56-0x00007FFF81570000-0x00007FFF82031000-memory.dmp

Filesize
10.8MB

Download
memory/3140-57-0x00007FFF81573000-0x00007FFF81575000-memory.dmp

Filesize
8KB

Download
memory/3140-58-0x00007FFF81570000-0x00007FFF82031000-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