xworm | a827b4c334d1614b5bf2f6cd6c64a380825073bf2a3adbd93004e5f5063c92f4

General

Target

XN05R_injector-helper.exe
Size

166KB
MD5

ab379c38321e11520f57c362c0dfbc73
SHA1

db66343fd289e8f6466abf35e3c97cb4604e580f
SHA256

a827b4c334d1614b5bf2f6cd6c64a380825073bf2a3adbd93004e5f5063c92f4
SHA512

deb2257401ba7d4b4d81280528752807f4c566543a6bb32dc277e2b8812fb37503638135365ec80c56f9d81fa42ef996dc9335e4a7be1dcaa2c722abb8416c08
SSDEEP

3072:ltmh0cYth8+bk9MuO5wE5SKBz65/M6If+3Js+3JFkKeTnQ:ltmWcUbbfi8SKxBt25

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%Temp%
install_file
svchost.exe
pastebin_url
https://pastebin.com/raw/kADeGNZE

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/1428-1-0x0000000000E20000-0x0000000000E50000-memory.dmp	family_xworm
behavioral2/files/0x000600000001e72a-57.dat	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
824	powershell.exe
2020	powershell.exe
4880	powershell.exe
4576	powershell.exe

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-1-5-21-925314154-1797147466-1467878628-1000\Control Panel\International\Geo\Nation	XN05R_injector-helper.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	XN05R_injector-helper.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	XN05R_injector-helper.exe

Executes dropped EXE 3 IoCs

pid	Process
712	svchost.exe
2248	svchost.exe
3252	svchost.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-1-5-21-925314154-1797147466-1467878628-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Local\\Temp\\svchost.exe"	XN05R_injector-helper.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
25	pastebin.com
26	pastebin.com

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
724	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
824	powershell.exe
824	powershell.exe
2020	powershell.exe
2020	powershell.exe
4880	powershell.exe
4880	powershell.exe
4576	powershell.exe
4576	powershell.exe
1428	XN05R_injector-helper.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	1428	XN05R_injector-helper.exe
Token: SeDebugPrivilege	824	powershell.exe
Token: SeDebugPrivilege	2020	powershell.exe
Token: SeDebugPrivilege	4880	powershell.exe
Token: SeDebugPrivilege	4576	powershell.exe
Token: SeDebugPrivilege	1428	XN05R_injector-helper.exe
Token: SeDebugPrivilege	712	svchost.exe
Token: SeDebugPrivilege	2248	svchost.exe
Token: SeDebugPrivilege	3252	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1428	XN05R_injector-helper.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1428 wrote to memory of 824	1428	XN05R_injector-helper.exe	90
PID 1428 wrote to memory of 824	1428	XN05R_injector-helper.exe	90
PID 1428 wrote to memory of 2020	1428	XN05R_injector-helper.exe	93
PID 1428 wrote to memory of 2020	1428	XN05R_injector-helper.exe	93
PID 1428 wrote to memory of 4880	1428	XN05R_injector-helper.exe	95
PID 1428 wrote to memory of 4880	1428	XN05R_injector-helper.exe	95
PID 1428 wrote to memory of 4576	1428	XN05R_injector-helper.exe	98
PID 1428 wrote to memory of 4576	1428	XN05R_injector-helper.exe	98
PID 1428 wrote to memory of 724	1428	XN05R_injector-helper.exe	100
PID 1428 wrote to memory of 724	1428	XN05R_injector-helper.exe	100

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\XN05R_injector-helper.exe
"C:\Users\Admin\AppData\Local\Temp\XN05R_injector-helper.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1428
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\XN05R_injector-helper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:824
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XN05R_injector-helper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2020
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4880
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4576
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:724

C:\Users\Admin\AppData\Local\Temp\svchost.exe
C:\Users\Admin\AppData\Local\Temp\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:712

C:\Users\Admin\AppData\Local\Temp\svchost.exe
C:\Users\Admin\AppData\Local\Temp\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2248

C:\Users\Admin\AppData\Local\Temp\svchost.exe
C:\Users\Admin\AppData\Local\Temp\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3252

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

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
944B

MD5
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
ef72c47dbfaae0b9b0d09f22ad4afe20

SHA1
5357f66ba69b89440b99d4273b74221670129338

SHA256
692ec20c7039170fb199510f0436181fd155e6b4516d4d1c9e1675adf99aaa7f

SHA512
7514b6bc8dc39fa618223300be27cd535dc35b18c66b4a089e2302e72b3e0cac06d88a989fa1296feb386b3cbe2084019df6430c7f895071b76e04ce559a30b4

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

Filesize
944B

MD5
96e3b86880fedd5afc001d108732a3e5

SHA1
8fc17b39d744a9590a6d5897012da5e6757439a3

SHA256
c3077e4cadb4ed246c02abe55aa6cf832fee4c2546b7addb7d22cd1c7c8c1294

SHA512
909b1968f7204fa7029109b02232d8cc5438f6b4dc7c9044e4e47c59fcee538199b13029e36592b12ed573d48a308dd4822d2ced4129ab08d4111897e02be55d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_epnu0i4u.rnp.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\svchost.exe

Filesize
166KB

MD5
ab379c38321e11520f57c362c0dfbc73

SHA1
db66343fd289e8f6466abf35e3c97cb4604e580f

SHA256
a827b4c334d1614b5bf2f6cd6c64a380825073bf2a3adbd93004e5f5063c92f4

SHA512
deb2257401ba7d4b4d81280528752807f4c566543a6bb32dc277e2b8812fb37503638135365ec80c56f9d81fa42ef996dc9335e4a7be1dcaa2c722abb8416c08

Download Submit
memory/824-12-0x00007FFD0C310000-0x00007FFD0CDD1000-memory.dmp

Filesize
10.8MB

Download
memory/824-17-0x00007FFD0C310000-0x00007FFD0CDD1000-memory.dmp

Filesize
10.8MB

Download
memory/824-14-0x00007FFD0C310000-0x00007FFD0CDD1000-memory.dmp

Filesize
10.8MB

Download
memory/824-13-0x00007FFD0C310000-0x00007FFD0CDD1000-memory.dmp

Filesize
10.8MB

Download
memory/824-11-0x000001A07C820000-0x000001A07C842000-memory.dmp

Filesize
136KB

Download
memory/1428-0-0x00007FFD0C313000-0x00007FFD0C315000-memory.dmp

Filesize
8KB

Download
memory/1428-56-0x00007FFD0C310000-0x00007FFD0CDD1000-memory.dmp

Filesize
10.8MB

Download
memory/1428-60-0x00007FFD0C310000-0x00007FFD0CDD1000-memory.dmp

Filesize
10.8MB

Download
memory/1428-1-0x0000000000E20000-0x0000000000E50000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads