xworm | 3d418b43b753aa207aa32e87d3aac20cb5cb1498852a3d2c310196c7d668fb80

General

Target

Bootstrapper_v2.3.exe
Size

3.0MB
MD5

7744ab1b77f1c5204aacbcc67f80f5bc
SHA1

a1af80b9ca1310167c4f8e772c3959fdf4167f32
SHA256

3d418b43b753aa207aa32e87d3aac20cb5cb1498852a3d2c310196c7d668fb80
SHA512

6760ad3682c7a5eae25c7ec934a0131b13e02f621d4ed4580300aab4659a4601afbcdfe1ada11155a8085be6b0759c38aa810587559a074d4d61ec281566771c
SSDEEP

49152:VmjfxLrv43xqsknxiEgcbMSYKlUgmFLH7G7g569awPsD9sOBfXVfRQ8kQ79u:Vedrg3xTkx3rUNG7a69vPsS6/VfRbksU

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

75.80.209.66:8080

Attributes

Install_directory
%Userprofile%
install_file
RealtekAudioDG.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x0033000000023c2d-6.dat	family_xworm
behavioral2/memory/4028-31-0x0000000000980000-0x000000000099A000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
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
4128	powershell.exe
3724	powershell.exe
932	powershell.exe
2056	powershell.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-250031470-1197856012-2659781506-1000\Control Panel\International\Geo\Nation	Bootstrapper_v2.3.exe
Key value queried	\REGISTRY\USER\S-1-5-21-250031470-1197856012-2659781506-1000\Control Panel\International\Geo\Nation	Bootstrapper_v2.2.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RealtekAudioDG.lnk	Bootstrapper_v2.2.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RealtekAudioDG.lnk	Bootstrapper_v2.2.exe

Executes dropped EXE 4 IoCs

pid	Process
4028	Bootstrapper_v2.2.exe
1208	BootstrapperNew (1).exe
4656	RealtekAudioDG.exe
2608	RealtekAudioDG.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-1-5-21-250031470-1197856012-2659781506-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RealtekAudioDG = "C:\\Users\\Admin\\RealtekAudioDG.exe"	Bootstrapper_v2.2.exe

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
4748	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4128	powershell.exe
4128	powershell.exe
3724	powershell.exe
3724	powershell.exe
932	powershell.exe
932	powershell.exe
2056	powershell.exe
2056	powershell.exe
4028	Bootstrapper_v2.2.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	4028	Bootstrapper_v2.2.exe
Token: SeDebugPrivilege	4128	powershell.exe
Token: SeDebugPrivilege	3724	powershell.exe
Token: SeDebugPrivilege	932	powershell.exe
Token: SeDebugPrivilege	2056	powershell.exe
Token: SeDebugPrivilege	4028	Bootstrapper_v2.2.exe
Token: SeDebugPrivilege	4656	RealtekAudioDG.exe
Token: SeDebugPrivilege	2608	RealtekAudioDG.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4028	Bootstrapper_v2.2.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1040 wrote to memory of 4028	1040	Bootstrapper_v2.3.exe	84
PID 1040 wrote to memory of 4028	1040	Bootstrapper_v2.3.exe	84
PID 1040 wrote to memory of 1208	1040	Bootstrapper_v2.3.exe	85
PID 1040 wrote to memory of 1208	1040	Bootstrapper_v2.3.exe	85
PID 4028 wrote to memory of 4128	4028	Bootstrapper_v2.2.exe	91
PID 4028 wrote to memory of 4128	4028	Bootstrapper_v2.2.exe	91
PID 4028 wrote to memory of 3724	4028	Bootstrapper_v2.2.exe	93
PID 4028 wrote to memory of 3724	4028	Bootstrapper_v2.2.exe	93
PID 4028 wrote to memory of 932	4028	Bootstrapper_v2.2.exe	95
PID 4028 wrote to memory of 932	4028	Bootstrapper_v2.2.exe	95
PID 4028 wrote to memory of 2056	4028	Bootstrapper_v2.2.exe	97
PID 4028 wrote to memory of 2056	4028	Bootstrapper_v2.2.exe	97
PID 4028 wrote to memory of 4748	4028	Bootstrapper_v2.2.exe	101
PID 4028 wrote to memory of 4748	4028	Bootstrapper_v2.2.exe	101

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_v2.3.exe
"C:\Users\Admin\AppData\Local\Temp\Bootstrapper_v2.3.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1040
- C:\Users\Admin\Bootstrapper_v2.2.exe
  "C:\Users\Admin\Bootstrapper_v2.2.exe"
  2⤵
  - Checks computer location settings
  - 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:4028
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\Bootstrapper_v2.2.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4128
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Bootstrapper_v2.2.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3724
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\RealtekAudioDG.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:932
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'RealtekAudioDG.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2056
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "RealtekAudioDG" /tr "C:\Users\Admin\RealtekAudioDG.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4748
- C:\Users\Admin\BootstrapperNew (1).exe
  "C:\Users\Admin\BootstrapperNew (1).exe"
  2⤵
  - Executes dropped EXE
  PID:1208

C:\Users\Admin\RealtekAudioDG.exe
C:\Users\Admin\RealtekAudioDG.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4656

C:\Users\Admin\RealtekAudioDG.exe
C:\Users\Admin\RealtekAudioDG.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2608

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\RealtekAudioDG.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
a43e653ffb5ab07940f4bdd9cc8fade4

SHA1
af43d04e3427f111b22dc891c5c7ee8a10ac4123

SHA256
c4c53abb13e99475aebfbe9fec7a8fead81c14c80d9dcc2b81375304f3a683fe

SHA512
62a97e95e1f19a8d4302847110dae44f469877eed6aa8ea22345c6eb25ee220e7d310fa0b7ec5df42356815421c0af7c46a0f1fee8933cc446641800eda6cd1b

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
76692775e4781f0c9f0092f5804cfdb1

SHA1
6740e4e4110028c62282ee1e7eb8be576a2bc23a

SHA256
0c451ff3823450d544066237cbfb08556b7ca36c4a0ea085055f69ab35795b00

SHA512
6e0731e3736594d9e86da2fc33e08a663f29100074cc8d46e2716123c946b9eb150c804c7cf8428cac631e1cff984663d41ce3b5e1e77965bd8e2ecf0742af34

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
01fff31a70e26012f37789b179059e32

SHA1
555b6f05cce7daf46920df1c01eb5c55dc62c9e6

SHA256
adf65afaf1c83572f05a99bf2ede8eb7be1aab0717d5254f501d5e09ba6f587b

SHA512
ac310c9bc5c1effc45e1e425972b09d1f961af216b50e1a504caa046b7f1a5f3179760e0b29591d83756ecb686d17a24770cf06fcea57e6f287ca5bbf6b6971b

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
dbb22d95851b93abf2afe8fb96a8e544

SHA1
920ec5fdb323537bcf78f7e29a4fc274e657f7a4

SHA256
e1ee9af6b9e3bfd41b7d2c980580bb7427883f1169ed3df4be11293ce7895465

SHA512
16031134458bf312509044a3028be46034c544163c4ca956aee74d2075fbeb5873754d2254dc1d0b573ce1a644336ac4c8bd7147aba100bfdac8c504900ef3fc

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_w2dhu2jz.4l5.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\BootstrapperNew (1).exe

Filesize
2.9MB

MD5
f227cdfd423b3cc03bb69c49babf4da3

SHA1
3db5a97d9b0f2545e7ba97026af6c28512200441

SHA256
cb5d6c1ca0aa6232a2d55e14b20ac4a9945a0bd063c57d60a5ed3ae94160e3e8

SHA512
b10afd03b02a928545c16fad39a6ae46b68b1e1a2477a6990803ce80008e7161fb2ebc9380ba15a1b074bb436aa34bcd6c94a922933d438b1c22489717e1e10e

Download Submit
C:\Users\Admin\Bootstrapper_v2.2.exe

Filesize
78KB

MD5
e237ba50d7c4c0d84f956a5168a78b49

SHA1
d61a3b653ba7b93e93b7e390e4dd1dda487b1e0d

SHA256
8b9f724111d915222ae03f66af3a00bcc4273dbe3474bd702bf34a067c256956

SHA512
ddd7f4c4f02a277c3227d575c09d66f2056ccbee50fd9ccd9901cf221638909ab865244c8e0f41e8ad3c2d33ece03da06f7472b4148186b7b563661cae60f759

Download Submit
memory/1040-1-0x00000000001E0000-0x00000000004DA000-memory.dmp

Filesize
3.0MB

Download
memory/1040-0-0x00007FFBDFBE3000-0x00007FFBDFBE5000-memory.dmp

Filesize
8KB

Download
memory/1208-65-0x0000024F9F770000-0x0000024F9F778000-memory.dmp

Filesize
32KB

Download
memory/1208-74-0x0000024FA1110000-0x0000024FA111A000-memory.dmp

Filesize
40KB

Download
memory/1208-69-0x0000024FA1160000-0x0000024FA1260000-memory.dmp

Filesize
1024KB

Download
memory/1208-70-0x0000024FA10F0000-0x0000024FA10FA000-memory.dmp

Filesize
40KB

Download
memory/1208-71-0x0000024FA1260000-0x0000024FA1286000-memory.dmp

Filesize
152KB

Download
memory/1208-72-0x0000024FA1290000-0x0000024FA1298000-memory.dmp

Filesize
32KB

Download
memory/1208-73-0x0000024FA12A0000-0x0000024FA12B6000-memory.dmp

Filesize
88KB

Download
memory/1208-68-0x0000024FA10E0000-0x0000024FA10EE000-memory.dmp

Filesize
56KB

Download
memory/1208-75-0x0000024FA1100000-0x0000024FA110A000-memory.dmp

Filesize
40KB

Download
memory/1208-76-0x0000024FA12D0000-0x0000024FA12D8000-memory.dmp

Filesize
32KB

Download
memory/1208-67-0x0000024FA1120000-0x0000024FA1158000-memory.dmp

Filesize
224KB

Download
memory/1208-131-0x00007FFBDFBE0000-0x00007FFBE06A1000-memory.dmp

Filesize
10.8MB

Download
memory/1208-66-0x00007FFBDFBE0000-0x00007FFBE06A1000-memory.dmp

Filesize
10.8MB

Download
memory/1208-64-0x0000024F86E90000-0x0000024F86EA0000-memory.dmp

Filesize
64KB

Download
memory/1208-130-0x00007FFBDFBE0000-0x00007FFBE06A1000-memory.dmp

Filesize
10.8MB

Download
memory/1208-63-0x0000024F84E10000-0x0000024F850F2000-memory.dmp

Filesize
2.9MB

Download
memory/4028-128-0x00007FFBDFBE0000-0x00007FFBE06A1000-memory.dmp

Filesize
10.8MB

Download
memory/4028-129-0x00007FFBDFBE0000-0x00007FFBE06A1000-memory.dmp

Filesize
10.8MB

Download
memory/4028-62-0x00007FFBDFBE0000-0x00007FFBE06A1000-memory.dmp

Filesize
10.8MB

Download
memory/4028-132-0x00007FFBDFBE0000-0x00007FFBE06A1000-memory.dmp

Filesize
10.8MB

Download
memory/4028-31-0x0000000000980000-0x000000000099A000-memory.dmp

Filesize
104KB

Download
memory/4128-87-0x00000199AFD90000-0x00000199AFDB2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads