xworm | 22164bae356ca295b6591f06832d663b48fe71ecf14cac212e446ce28bc27114

Analysis

max time kernel
122s
max time network
127s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
11-11-2024 16:39

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General

Target

Bootstrapper.exe
Size

889KB
MD5

4a38f2fd264d3753024a560d0aaaa299
SHA1

0e1bbf0e5fd66a4b731af686966f220d8b31e0e9
SHA256

22164bae356ca295b6591f06832d663b48fe71ecf14cac212e446ce28bc27114
SHA512

68208d1b48c5be93501426f37eb3582b30c5f4752d0addd614c8a51edeec4c9abebd44894163d30f0f437631e0b96657060ff81ad8a0e60dbe4b17d933352956
SSDEEP

12288:SiJzQUyRS7vjzyGaL94l68NoS/S3iorPzSCH8MGSD2vKo7pnyzRyRB4c/YP8Mp1c:SiJsUG2KGaZ4OSa3hBH83S2pgzNbGp

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

hrgj7va.localto.net:5261

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/files/0x0003000000018334-6.dat	family_xworm
behavioral1/memory/2200-9-0x0000000000950000-0x000000000096A000-memory.dmp	family_xworm
behavioral1/memory/2144-33-0x0000000001220000-0x000000000123A000-memory.dmp	family_xworm

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

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FluxusV1.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FluxusV1.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FluxusV1.lnk	FluxusV1.2

Executes dropped EXE 4 IoCs

pid	Process
2200	XClient.exe
2804	Bootstrapper.exe
1256	Process not Found
2144	FluxusV1.2

Loads dropped DLL 6 IoCs

pid	Process
2536	Bootstrapper.exe
1116	WerFault.exe
1116	WerFault.exe
1116	WerFault.exe
1116	WerFault.exe
1116	WerFault.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\FluxusV1 = "C:\\Users\\Admin\\AppData\\Roaming\\FluxusV1.2"	FluxusV1.2
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\FluxusV1 = "C:\\Users\\Admin\\AppData\\Roaming\\FluxusV1.2"	XClient.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1496	timeout.exe

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
2884	ipconfig.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1780	schtasks.exe
812	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2200	XClient.exe
2144	FluxusV1.2

Suspicious use of AdjustPrivilegeToken 45 IoCs

description	pid	Process
Token: SeDebugPrivilege	2200	XClient.exe
Token: SeDebugPrivilege	2200	XClient.exe
Token: SeIncreaseQuotaPrivilege	2308	WMIC.exe
Token: SeSecurityPrivilege	2308	WMIC.exe
Token: SeTakeOwnershipPrivilege	2308	WMIC.exe
Token: SeLoadDriverPrivilege	2308	WMIC.exe
Token: SeSystemProfilePrivilege	2308	WMIC.exe
Token: SeSystemtimePrivilege	2308	WMIC.exe
Token: SeProfSingleProcessPrivilege	2308	WMIC.exe
Token: SeIncBasePriorityPrivilege	2308	WMIC.exe
Token: SeCreatePagefilePrivilege	2308	WMIC.exe
Token: SeBackupPrivilege	2308	WMIC.exe
Token: SeRestorePrivilege	2308	WMIC.exe
Token: SeShutdownPrivilege	2308	WMIC.exe
Token: SeDebugPrivilege	2308	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2308	WMIC.exe
Token: SeRemoteShutdownPrivilege	2308	WMIC.exe
Token: SeUndockPrivilege	2308	WMIC.exe
Token: SeManageVolumePrivilege	2308	WMIC.exe
Token: 33	2308	WMIC.exe
Token: 34	2308	WMIC.exe
Token: 35	2308	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2308	WMIC.exe
Token: SeSecurityPrivilege	2308	WMIC.exe
Token: SeTakeOwnershipPrivilege	2308	WMIC.exe
Token: SeLoadDriverPrivilege	2308	WMIC.exe
Token: SeSystemProfilePrivilege	2308	WMIC.exe
Token: SeSystemtimePrivilege	2308	WMIC.exe
Token: SeProfSingleProcessPrivilege	2308	WMIC.exe
Token: SeIncBasePriorityPrivilege	2308	WMIC.exe
Token: SeCreatePagefilePrivilege	2308	WMIC.exe
Token: SeBackupPrivilege	2308	WMIC.exe
Token: SeRestorePrivilege	2308	WMIC.exe
Token: SeShutdownPrivilege	2308	WMIC.exe
Token: SeDebugPrivilege	2308	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2308	WMIC.exe
Token: SeRemoteShutdownPrivilege	2308	WMIC.exe
Token: SeUndockPrivilege	2308	WMIC.exe
Token: SeManageVolumePrivilege	2308	WMIC.exe
Token: 33	2308	WMIC.exe
Token: 34	2308	WMIC.exe
Token: 35	2308	WMIC.exe
Token: SeDebugPrivilege	2804	Bootstrapper.exe
Token: SeDebugPrivilege	2144	FluxusV1.2
Token: SeDebugPrivilege	2144	FluxusV1.2

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2200	XClient.exe
2144	FluxusV1.2

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2536 wrote to memory of 2200	2536	Bootstrapper.exe	30
PID 2536 wrote to memory of 2200	2536	Bootstrapper.exe	30
PID 2536 wrote to memory of 2200	2536	Bootstrapper.exe	30
PID 2536 wrote to memory of 2804	2536	Bootstrapper.exe	31
PID 2536 wrote to memory of 2804	2536	Bootstrapper.exe	31
PID 2536 wrote to memory of 2804	2536	Bootstrapper.exe	31
PID 2804 wrote to memory of 2752	2804	Bootstrapper.exe	33
PID 2804 wrote to memory of 2752	2804	Bootstrapper.exe	33
PID 2804 wrote to memory of 2752	2804	Bootstrapper.exe	33
PID 2752 wrote to memory of 2884	2752	cmd.exe	35
PID 2752 wrote to memory of 2884	2752	cmd.exe	35
PID 2752 wrote to memory of 2884	2752	cmd.exe	35
PID 2200 wrote to memory of 1780	2200	XClient.exe	36
PID 2200 wrote to memory of 1780	2200	XClient.exe	36
PID 2200 wrote to memory of 1780	2200	XClient.exe	36
PID 2804 wrote to memory of 3060	2804	Bootstrapper.exe	38
PID 2804 wrote to memory of 3060	2804	Bootstrapper.exe	38
PID 2804 wrote to memory of 3060	2804	Bootstrapper.exe	38
PID 3060 wrote to memory of 2308	3060	cmd.exe	40
PID 3060 wrote to memory of 2308	3060	cmd.exe	40
PID 3060 wrote to memory of 2308	3060	cmd.exe	40
PID 2804 wrote to memory of 1116	2804	Bootstrapper.exe	42
PID 2804 wrote to memory of 1116	2804	Bootstrapper.exe	42
PID 2804 wrote to memory of 1116	2804	Bootstrapper.exe	42
PID 340 wrote to memory of 2144	340	taskeng.exe	44
PID 340 wrote to memory of 2144	340	taskeng.exe	44
PID 340 wrote to memory of 2144	340	taskeng.exe	44
PID 2144 wrote to memory of 812	2144	FluxusV1.2	45
PID 2144 wrote to memory of 812	2144	FluxusV1.2	45
PID 2144 wrote to memory of 812	2144	FluxusV1.2	45
PID 2144 wrote to memory of 1636	2144	FluxusV1.2	48
PID 2144 wrote to memory of 1636	2144	FluxusV1.2	48
PID 2144 wrote to memory of 1636	2144	FluxusV1.2	48
PID 2144 wrote to memory of 2492	2144	FluxusV1.2	50
PID 2144 wrote to memory of 2492	2144	FluxusV1.2	50
PID 2144 wrote to memory of 2492	2144	FluxusV1.2	50
PID 2492 wrote to memory of 1496	2492	cmd.exe	52
PID 2492 wrote to memory of 1496	2492	cmd.exe	52
PID 2492 wrote to memory of 1496	2492	cmd.exe	52

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Bootstrapper.exe
"C:\Users\Admin\AppData\Local\Temp\Bootstrapper.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2536
- C:\Users\Admin\AppData\Roaming\XClient.exe
  "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2200
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "FluxusV1" /tr "C:\Users\Admin\AppData\Roaming\FluxusV1.2"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1780
- C:\Users\Admin\AppData\Roaming\Bootstrapper.exe
  "C:\Users\Admin\AppData\Roaming\Bootstrapper.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2804
- - C:\Windows\system32\cmd.exe
    "cmd" /c ipconfig /all
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2752
  - - C:\Windows\system32\ipconfig.exe
      ipconfig /all
      4⤵
      Gathers network information
      PID:2884
- - C:\Windows\system32\cmd.exe
    "cmd" /c wmic nicconfig where (IPEnabled=TRUE) call SetDNSServerSearchOrder ("1.1.1.1", "1.0.0.1")
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3060
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic nicconfig where (IPEnabled=TRUE) call SetDNSServerSearchOrder ("1.1.1.1", "1.0.0.1")
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2308
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe -u -p 2804 -s 1152
    3⤵
    - Loads dropped DLL
    PID:1116

C:\Windows\system32\taskeng.exe
taskeng.exe {698321DD-8998-4794-8629-F6E0BC90C7D2} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:340
- C:\Users\Admin\AppData\Roaming\FluxusV1.2
  C:\Users\Admin\AppData\Roaming\FluxusV1.2
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2144
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "FluxusV1" /tr "C:\Users\Admin\AppData\Roaming\FluxusV1.2"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:812
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /delete /f /tn "FluxusV1"
    3⤵
    PID:1636
- - C:\Windows\system32\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpB220.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2492
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:1496

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB220.tmp.bat

Filesize
155B

MD5
d3746965bab412d0955693d90a119ebc

SHA1
1caa9c387d97968d79a8bfd9a457cc4107ea103d

SHA256
3b139d67441a5440ece0ee821f07cfe9c4e18718c476b5ada43527813e7cc5f8

SHA512
f8d7a0d375bd867ee81579fd3b73bcc07a25e1953c0b4256eb7574675a258bd6812ce4eef131e95689e3d34ebc66b34ac8fd87249bbc4ab3985005062fb084d0

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FluxusV1.lnk

Filesize
687B

MD5
8403048540f36541e6dc03b8dea10a31

SHA1
90a3236a41cf2741d26a8734479b2e26f1151a39

SHA256
8aa7bb11671310b647ea56830d387efce4cbef7ea7f9f15d08f093dc1c148620

SHA512
1a6e9c6386acf46a3c98179e8a9825dc64060ff00e6e5fa2d388fcb06922b8f20da2fb698e2c3cdc63e7995c6734e3c033e3cd5e6152c4830cc359d29c8b0757

Download Submit
C:\Users\Admin\AppData\Roaming\XClient.exe

Filesize
75KB

MD5
5d85f2a61188a38acfc4d2a12d206578

SHA1
09f0dcc4fc1de3ffff40f00461ed03bcd419ffaa

SHA256
4511294c021f344430101977fe4c2d8923682d4b1bb09d5cb10e98076538f33b

SHA512
7aca24699c68ee4094d42ac4e25ba35847d22a22dc6c912660c41eed7a1eb89b8de1e6dd6122e869e187590add354ad745ac2f372bf037b81df81788e176a58e

Download Submit
\Users\Admin\AppData\Roaming\Bootstrapper.exe

Filesize
800KB

MD5
2a4dcf20b82896be94eb538260c5fb93

SHA1
21f232c2fd8132f8677e53258562ad98b455e679

SHA256
ebbcb489171abfcfce56554dbaeacd22a15838391cbc7c756db02995129def5a

SHA512
4f1164b2312fb94b7030d6eb6aa9f3502912ffa33505f156443570fc964bfd3bb21ded3cf84092054e07346d2dce83a0907ba33f4ba39ad3fe7a78e836efe288

Download Submit
memory/2144-33-0x0000000001220000-0x000000000123A000-memory.dmp

Filesize
104KB

Download
memory/2200-15-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/2200-20-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/2200-21-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/2200-27-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/2200-29-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/2200-9-0x0000000000950000-0x000000000096A000-memory.dmp

Filesize
104KB

Download
memory/2536-0-0x000007FEF55F3000-0x000007FEF55F4000-memory.dmp

Filesize
4KB

Download
memory/2536-1-0x0000000000B60000-0x0000000000C44000-memory.dmp

Filesize
912KB

Download
memory/2804-14-0x0000000001150000-0x000000000121E000-memory.dmp

Filesize
824KB

Download