xworm | eb75a771291082654ce1c0ef9feb1bf6cd30da8b85b1e342df0bd3b9af35a3b8

Analysis

max time kernel
143s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
26/05/2024, 15:32

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General

Target
Expensive 3.1.exe
Size 60KB
Sample240526-sym56abc2w
SHA256 eb75a771291082654ce1c0ef9feb1bf6cd30da8b85b1e342df0bd3b9af35a3b8
MD5 a66624abb377e5ff52d4d2ae2707aca2
SHA1 a8bcdcaa2536996637e19827d2753e55bba45a28
SHA512 ec24aad17f3febb434f6c2f8c371ff0bba486abe9e7768c55f8ca766bb0363791b8a991945795277170a57a64f431a1c5f70a7d4acc4b7d878e9e983aafe26d1
SSDEEP 1536:4ptathcJHAxzcA0VzP5k3O+bB3JcSnGSq67Oy7m/:YoPcJVK++b9JcqOyM
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

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/1840-1-0x0000000000E90000-0x0000000000EA6000-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
4228	powershell.exe
2164	powershell.exe
3184	powershell.exe
3416	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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	Expensive 3.1.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-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Expensive 3.1 = "C:\\Users\\Admin\\AppData\\Roaming\\Expensive 3.1.exe"	Expensive 3.1.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
2164	powershell.exe
2164	powershell.exe
3184	powershell.exe
3184	powershell.exe
3416	powershell.exe
3416	powershell.exe
4228	powershell.exe
4228	powershell.exe
1840	Expensive 3.1.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1840	Expensive 3.1.exe
Token: SeDebugPrivilege	2164	powershell.exe
Token: SeDebugPrivilege	3184	powershell.exe
Token: SeDebugPrivilege	3416	powershell.exe
Token: SeDebugPrivilege	4228	powershell.exe
Token: SeDebugPrivilege	1840	Expensive 3.1.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1840	Expensive 3.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1840 wrote to memory of 2164	1840	Expensive 3.1.exe	86
PID 1840 wrote to memory of 2164	1840	Expensive 3.1.exe	86
PID 1840 wrote to memory of 3184	1840	Expensive 3.1.exe	90
PID 1840 wrote to memory of 3184	1840	Expensive 3.1.exe	90
PID 1840 wrote to memory of 3416	1840	Expensive 3.1.exe	94
PID 1840 wrote to memory of 3416	1840	Expensive 3.1.exe	94
PID 1840 wrote to memory of 4228	1840	Expensive 3.1.exe	96
PID 1840 wrote to memory of 4228	1840	Expensive 3.1.exe	96

C:\Users\Admin\AppData\Local\Temp\Expensive 3.1.exe
"C:\Users\Admin\AppData\Local\Temp\Expensive 3.1.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1840
- 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\Expensive 3.1.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2164
- 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:3184
- 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:3416
- 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:4228

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb
MD5 77d622bb1a5b250869a3238b9bc1402b
SHA1 d47f4003c2554b9dfc4c16f22460b331886b191b
SHA512 d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 55b1d8021c4eb4c3c0d75e3ed7a4eb30cd0123e3d69f32eeb596fe4ffec05abf
MD5 22310ad6749d8cc38284aa616efcd100
SHA1 440ef4a0a53bfa7c83fe84326a1dff4326dcb515
SHA512 2ef08e2ee15bb86695fe0c10533014ffed76ececc6e579d299d3365fafb7627f53e32e600bb6d872b9f58aca94f8cb7e1e94cdfd14777527f7f0aa019d9c6def
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 bceb96f5c3d31447980eb8cd891bba75b3e5b6eb60abf4d829fc13cd8faf2582
MD5 3db1c0d23daacf01eb99125ccc2787d3
SHA1 0849528de1ba411279231d635d8f39d54cc829d2
SHA512 3d84635a3395bca1d91ce182ccfb9e38c8da87ad678704673a72d580e4251cedc5a6b2a89040a172a5687b67952e74a13673bd115bce7bdabaed06f89323de5b
MD5 SHA1 SHA512

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__PSScriptPolicyTest_f1lodfbn.t4s.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_f1lodfbn.t4s.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/1840-53-0x00007FFB9B590000-0x00007FFB9C051000-memory.dmp

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memory/1840-1-0x0000000000E90000-0x0000000000EA6000-memory.dmp

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memory/1840-0-0x00007FFB9B593000-0x00007FFB9B595000-memory.dmp

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memory/1840-54-0x00007FFB9B593000-0x00007FFB9B595000-memory.dmp

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memory/1840-55-0x00007FFB9B590000-0x00007FFB9C051000-memory.dmp

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memory/1840-56-0x00000000031E0000-0x00000000031EC000-memory.dmp

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memory/2164-14-0x00007FFB9B590000-0x00007FFB9C051000-memory.dmp

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memory/2164-17-0x00007FFB9B590000-0x00007FFB9C051000-memory.dmp

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memory/2164-13-0x00007FFB9B590000-0x00007FFB9C051000-memory.dmp

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memory/2164-12-0x00007FFB9B590000-0x00007FFB9C051000-memory.dmp

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memory/2164-2-0x000001E0ED9E0000-0x000001E0EDA02000-memory.dmp

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