xworm | 6c6218309f99b7daa7627c2f940f7f07e49eac4a868759cddda6a004e0e10a2e

General

Target

BootStrapperV2.exe
Size

86KB
MD5

18b7c253c7155c93a21a35a8f9389596
SHA1

5addcc53bf95e2f5fe72d4770b093f6262daeb55
SHA256

6c6218309f99b7daa7627c2f940f7f07e49eac4a868759cddda6a004e0e10a2e
SHA512

529bd396899184ca4b07a5d4fb2bfe1982c2d44fc4c24d3a15cf5f600c41fee49f3ce9f0798f47ce7b1482eacb23a33b9e2734e740a22924f52156b6e29b9608
SSDEEP

1536:hXARphtCCV1k1n8MZ0BNWL0pBfrICZFQECHNctTrzuaLi2vQPvG/UvI5MmmZu1Ac:huB1pi0XWikCZ4ctXzdvQPv0UIud8ArC

Score

10^/10

xworm defense_evasion rat trojan

Malware Config

Extracted

Family

xworm

C2

where-reverse.gl.at.ply.gg:9999

Attributes

Install_directory
%ProgramData%
install_file
Helper.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x002a0000000450e5-7.dat	family_xworm
behavioral1/memory/776-18-0x0000000000F60000-0x0000000000F7A000-memory.dmp	family_xworm

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

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-1-5-21-87863914-780023816-688321450-1000\Control Panel\International\Geo\Nation	BootStrapperV2.exe

Executes dropped EXE 1 IoCs

pid	Process
776	BootStrapper.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
7	ip-api.com

Obfuscated Files or Information: Command Obfuscation 1 TTPs
Adversaries may obfuscate content during command execution to impede detection.
defense_evasion

Command Obfuscation
T1027.010

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\BootStrapper.exe	BootStrapperV2.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2700	powershell.exe
2700	powershell.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeDebugPrivilege	776	BootStrapper.exe
Token: SeDebugPrivilege	2700	powershell.exe
Token: SeIncreaseQuotaPrivilege	2700	powershell.exe
Token: SeSecurityPrivilege	2700	powershell.exe
Token: SeTakeOwnershipPrivilege	2700	powershell.exe
Token: SeLoadDriverPrivilege	2700	powershell.exe
Token: SeSystemProfilePrivilege	2700	powershell.exe
Token: SeSystemtimePrivilege	2700	powershell.exe
Token: SeProfSingleProcessPrivilege	2700	powershell.exe
Token: SeIncBasePriorityPrivilege	2700	powershell.exe
Token: SeCreatePagefilePrivilege	2700	powershell.exe
Token: SeBackupPrivilege	2700	powershell.exe
Token: SeRestorePrivilege	2700	powershell.exe
Token: SeShutdownPrivilege	2700	powershell.exe
Token: SeDebugPrivilege	2700	powershell.exe
Token: SeSystemEnvironmentPrivilege	2700	powershell.exe
Token: SeRemoteShutdownPrivilege	2700	powershell.exe
Token: SeUndockPrivilege	2700	powershell.exe
Token: SeManageVolumePrivilege	2700	powershell.exe
Token: 33	2700	powershell.exe
Token: 34	2700	powershell.exe
Token: 35	2700	powershell.exe
Token: 36	2700	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2124 wrote to memory of 2700	2124	BootStrapperV2.exe	81
PID 2124 wrote to memory of 2700	2124	BootStrapperV2.exe	81
PID 2124 wrote to memory of 776	2124	BootStrapperV2.exe	83
PID 2124 wrote to memory of 776	2124	BootStrapperV2.exe	83

C:\Users\Admin\AppData\Local\Temp\BootStrapperV2.exe
"C:\Users\Admin\AppData\Local\Temp\BootStrapperV2.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2124
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGoAaABoACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAGkAZwBwACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAG0AawBjACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAGcAeABjACMAPgA="
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2700
- C:\Windows\BootStrapper.exe
  "C:\Windows\BootStrapper.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:776

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Obfuscated Files or Information

1

T1027

Command Obfuscation

1

T1027.010

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\Temp\__PSScriptPolicyTest_4hului1j.4y2.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Windows\BootStrapper.exe

Filesize
79KB

MD5
6a38c40e75c6a8bf59c27f075ae8fe50

SHA1
dea1a6673aba42fff5091f1098530db6378b4843

SHA256
3116545d3502db62348b0b8cd70a2a02e38a82309489f09cf11f346958c4b8e7

SHA512
1740a10610ec5327089ea2a14e4750253a4059803ec7545432d63189a8cf31b2d6ec8ae8a4f6db5ae3070f1cdfc5c5eb05cdd65c8687f522f5f96244a1839c0d

Download Submit
memory/776-34-0x00007FF937880000-0x00007FF938342000-memory.dmp

Filesize
10.8MB

Download
memory/776-18-0x0000000000F60000-0x0000000000F7A000-memory.dmp

Filesize
104KB

Download
memory/776-20-0x00007FF937880000-0x00007FF938342000-memory.dmp

Filesize
10.8MB

Download
memory/776-38-0x00007FF937880000-0x00007FF938342000-memory.dmp

Filesize
10.8MB

Download
memory/2124-0-0x00007FF937883000-0x00007FF937885000-memory.dmp

Filesize
8KB

Download
memory/2124-19-0x00007FF937880000-0x00007FF938342000-memory.dmp

Filesize
10.8MB

Download
memory/2124-3-0x00007FF937880000-0x00007FF938342000-memory.dmp

Filesize
10.8MB

Download
memory/2124-1-0x0000000000F10000-0x0000000000F2C000-memory.dmp

Filesize
112KB

Download
memory/2700-27-0x000002397D500000-0x000002397D522000-memory.dmp

Filesize
136KB

Download
memory/2700-33-0x00007FF937880000-0x00007FF938342000-memory.dmp

Filesize
10.8MB

Download
memory/2700-32-0x00007FF937880000-0x00007FF938342000-memory.dmp

Filesize
10.8MB

Download
memory/2700-37-0x00007FF937880000-0x00007FF938342000-memory.dmp

Filesize
10.8MB

Download
memory/2700-21-0x00007FF937880000-0x00007FF938342000-memory.dmp

Filesize
10.8MB

Download

Analysis

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