xworm | 96dea95151b45309d8bda1112f842802e852a15ac2173b0023b1ba35deae5ec1

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
26-09-2024 11:25

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General

Target

rDoc5633276235623657_xls.exe
Size

84KB
MD5

d5489da5aa14ed9d71d8338ec41a1bc1
SHA1

fe04a678f7d95ed31bd364e0a8a4831964f2b84f
SHA256

96dea95151b45309d8bda1112f842802e852a15ac2173b0023b1ba35deae5ec1
SHA512

68ae7b3c2367f9a2124dba4549ee90dede2fd12552acb7823eae42ffa014e7f4b37cb95b836d01de1270cbc3a48d2903988dc69d1f4f7646d39a9d0b7c77a940
SSDEEP

1536:WGOLl+jxSwe51ZMXEw1PfEeRH0bndlu630VDx:WGOBCtE1ZpwJbSndTEVDx

Score

10^/10

xworm discovery rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

178.215.236.218:16433

Mutex

OeRWZLHs1gN7FCy5

Attributes

Install_directory
%AppData%
install_file
XClient.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4948-3-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm

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

Drops startup file 2 IoCs

Processes:

RegAsm.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	RegAsm.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

rDoc5633276235623657_xls.exe

description pid process target process

PID 1824 set thread context of 4948 1824 rDoc5633276235623657_xls.exe RegAsm.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	pid	process	target process
PID 1824 set thread context of 4948	1824	rDoc5633276235623657_xls.exe	RegAsm.exe

System Location Discovery: System Language Discovery 1 TTPs 2 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

Processes:

rDoc5633276235623657_xls.exeRegAsm.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rDoc5633276235623657_xls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

rDoc5633276235623657_xls.exeRegAsm.exe

description	pid	process
Token: SeDebugPrivilege	1824	rDoc5633276235623657_xls.exe
Token: SeDebugPrivilege	4948	RegAsm.exe
Token: SeDebugPrivilege	4948	RegAsm.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

rDoc5633276235623657_xls.exe

description	pid	process	target process
PID 1824 wrote to memory of 4948	1824	rDoc5633276235623657_xls.exe	RegAsm.exe
PID 1824 wrote to memory of 4948	1824	rDoc5633276235623657_xls.exe	RegAsm.exe
PID 1824 wrote to memory of 4948	1824	rDoc5633276235623657_xls.exe	RegAsm.exe
PID 1824 wrote to memory of 4948	1824	rDoc5633276235623657_xls.exe	RegAsm.exe
PID 1824 wrote to memory of 4948	1824	rDoc5633276235623657_xls.exe	RegAsm.exe
PID 1824 wrote to memory of 4948	1824	rDoc5633276235623657_xls.exe	RegAsm.exe
PID 1824 wrote to memory of 4948	1824	rDoc5633276235623657_xls.exe	RegAsm.exe
PID 1824 wrote to memory of 4948	1824	rDoc5633276235623657_xls.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\rDoc5633276235623657_xls.exe
"C:\Users\Admin\AppData\Local\Temp\rDoc5633276235623657_xls.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1824
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Drops startup file
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4948

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1824-5-0x0000000074500000-0x0000000074CB0000-memory.dmp

Filesize
7.7MB

Download
memory/1824-1-0x0000000000050000-0x000000000006E000-memory.dmp

Filesize
120KB

Download
memory/1824-2-0x0000000074500000-0x0000000074CB0000-memory.dmp

Filesize
7.7MB

Download
memory/1824-0-0x000000007450E000-0x000000007450F000-memory.dmp

Filesize
4KB

Download
memory/4948-7-0x00000000055D0000-0x000000000566C000-memory.dmp

Filesize
624KB

Download
memory/4948-6-0x0000000074500000-0x0000000074CB0000-memory.dmp

Filesize
7.7MB

Download
memory/4948-3-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/4948-12-0x0000000074500000-0x0000000074CB0000-memory.dmp

Filesize
7.7MB

Download
memory/4948-13-0x0000000074500000-0x0000000074CB0000-memory.dmp

Filesize
7.7MB

Download
memory/4948-14-0x0000000005E20000-0x0000000005E86000-memory.dmp

Filesize
408KB

Download
memory/4948-15-0x0000000074500000-0x0000000074CB0000-memory.dmp

Filesize
7.7MB

Download
memory/4948-16-0x0000000006920000-0x00000000069B2000-memory.dmp

Filesize
584KB

Download
memory/4948-17-0x0000000006F70000-0x0000000007514000-memory.dmp

Filesize
5.6MB

Download