xworm | a245dc0d34568bb31a62d55ff3d1c5431ac28bb1c831f2ad19507220d253776c

General

Target

b.ps1
Size

165KB
MD5

482ece68e9b421f4ee1fd93123ec3d54
SHA1

bfff81451cec255b6f31b0b5b0f1c38d0c1ef807
SHA256

a245dc0d34568bb31a62d55ff3d1c5431ac28bb1c831f2ad19507220d253776c
SHA512

8d9c5e6152c0ad6c4f247925c4594a2ea5bd0876a43f5c4a0fefbab615ead636c3d434a3f4c757a3eda2f54a7a7782614e98043553a578669a213c03b7fdfefe
SSDEEP

3072:ZcUKZ20H5qt7ABLmYOlba6c5GdOa7MQrq3v0ayW3sfc4xDAmMz/zlZVdtj0QPvBH:ZcB20H5qt7ABLmYOlba6c5GdOa7MQrqJ

Score

10^/10

xworm discovery execution rat trojan

Malware Config

Extracted

Family

xworm

C2

92.255.57.155:4411

Attributes

install_file
USB.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/2308-15-0x0000000000400000-0x0000000000412000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4616 set thread context of 2308	4616	powershell.exe	84

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4616	powershell.exe

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	wermgr.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	wermgr.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	wermgr.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	wermgr.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	wermgr.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4616	powershell.exe
4616	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4616	powershell.exe
Token: SeDebugPrivilege	2308	RegSvcs.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4616 wrote to memory of 2308	4616	powershell.exe	84
PID 4616 wrote to memory of 2308	4616	powershell.exe	84
PID 4616 wrote to memory of 2308	4616	powershell.exe	84
PID 4616 wrote to memory of 2308	4616	powershell.exe	84
PID 4616 wrote to memory of 2308	4616	powershell.exe	84
PID 4616 wrote to memory of 2308	4616	powershell.exe	84
PID 4616 wrote to memory of 2308	4616	powershell.exe	84
PID 4616 wrote to memory of 2308	4616	powershell.exe	84
PID 4616 wrote to memory of 3556	4616	powershell.exe	85
PID 4616 wrote to memory of 3556	4616	powershell.exe	85

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\b.ps1
1⤵
- Suspicious use of SetThreadContext
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4616
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2308
- C:\Windows\system32\wermgr.exe
  "C:\Windows\system32\wermgr.exe" "-outproc" "0" "4616" "2000" "2008" "2192" "0" "0" "2036" "0" "0" "0" "0" "0"
  2⤵
  - Checks processor information in registry
  - Enumerates system info in registry
  PID:3556

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

2

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_43m5gbmj.fuz.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2308-15-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2308-19-0x0000000005060000-0x00000000050FC000-memory.dmp

Filesize
624KB

Download
memory/4616-0-0x00007FF94BB43000-0x00007FF94BB45000-memory.dmp

Filesize
8KB

Download
memory/4616-7-0x0000028242B30000-0x0000028242B52000-memory.dmp

Filesize
136KB

Download
memory/4616-11-0x00007FF94BB40000-0x00007FF94C601000-memory.dmp

Filesize
10.8MB

Download
memory/4616-12-0x00007FF94BB40000-0x00007FF94C601000-memory.dmp

Filesize
10.8MB

Download
memory/4616-13-0x0000028228530000-0x0000028228548000-memory.dmp

Filesize
96KB

Download
memory/4616-14-0x0000028228370000-0x0000028228376000-memory.dmp

Filesize
24KB

Download
memory/4616-16-0x00007FF94BB40000-0x00007FF94C601000-memory.dmp

Filesize
10.8MB

Download
memory/4616-26-0x00007FF94BB40000-0x00007FF94C601000-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