xworm | 8641f88b89c9076ece3ee571baa4b3c93ba3ac3883e90fe5f894dc41e3b7bdc7

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
18-04-2024 11:31

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General

Target

Ro-exec/loader-upd.exe
Size

70KB
MD5

573bd20fc8382d92a7ae9eae51e738e3
SHA1

55006093429df791f27e91a66e5ee63a81382b28
SHA256

09036ffa342f9e5bb1e31a867dcc3b60db011baba8c0d202aff1d33195cbe729
SHA512

d38736acff4128d6ce9ea17ee609ca33a37ac88f2c994cf4caf7f0eb62406a8963c33531b9f3cd020974d892c2751f3a4f67ce13ed6ba6080f97c406ccbb4aca
SSDEEP

1536:PmMfwrNATngx6fPLgD9vYebv2S5NiwWW6N9dOoihkAO:LCmn463UD6ebv242FzOoiSAO

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%Public%
install_file
svchost.exe
pastebin_url
https://pastebin.com/raw/UWpQULMP

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral5/memory/2188-0-0x0000000000830000-0x0000000000848000-memory.dmp	family_xworm
behavioral5/files/0x000f00000001224d-56.dat	family_xworm
behavioral5/memory/1364-58-0x0000000001080000-0x0000000001098000-memory.dmp	family_xworm

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

Executes dropped EXE 3 IoCs

pid	Process
1364	svchost.exe
600	svchost.exe
1712	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-1-5-21-3452737119-3959686427-228443150-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Public\\svchost.exe"	loader-upd.exe

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

Web Service

T1102

flow	ioc
4	pastebin.com
5	pastebin.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
3020	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2188	loader-upd.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2732	powershell.exe
2548	powershell.exe
1800	powershell.exe
2276	powershell.exe
2188	loader-upd.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	2188	loader-upd.exe
Token: SeDebugPrivilege	2732	powershell.exe
Token: SeDebugPrivilege	2548	powershell.exe
Token: SeDebugPrivilege	1800	powershell.exe
Token: SeDebugPrivilege	2276	powershell.exe
Token: SeDebugPrivilege	2188	loader-upd.exe
Token: SeDebugPrivilege	1364	svchost.exe
Token: SeDebugPrivilege	600	svchost.exe
Token: SeDebugPrivilege	1712	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2188	loader-upd.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2188 wrote to memory of 2732	2188	loader-upd.exe	28
PID 2188 wrote to memory of 2732	2188	loader-upd.exe	28
PID 2188 wrote to memory of 2732	2188	loader-upd.exe	28
PID 2188 wrote to memory of 2548	2188	loader-upd.exe	30
PID 2188 wrote to memory of 2548	2188	loader-upd.exe	30
PID 2188 wrote to memory of 2548	2188	loader-upd.exe	30
PID 2188 wrote to memory of 1800	2188	loader-upd.exe	32
PID 2188 wrote to memory of 1800	2188	loader-upd.exe	32
PID 2188 wrote to memory of 1800	2188	loader-upd.exe	32
PID 2188 wrote to memory of 2276	2188	loader-upd.exe	34
PID 2188 wrote to memory of 2276	2188	loader-upd.exe	34
PID 2188 wrote to memory of 2276	2188	loader-upd.exe	34
PID 2188 wrote to memory of 3020	2188	loader-upd.exe	36
PID 2188 wrote to memory of 3020	2188	loader-upd.exe	36
PID 2188 wrote to memory of 3020	2188	loader-upd.exe	36
PID 1844 wrote to memory of 1364	1844	taskeng.exe	40
PID 1844 wrote to memory of 1364	1844	taskeng.exe	40
PID 1844 wrote to memory of 1364	1844	taskeng.exe	40
PID 1844 wrote to memory of 600	1844	taskeng.exe	43
PID 1844 wrote to memory of 600	1844	taskeng.exe	43
PID 1844 wrote to memory of 600	1844	taskeng.exe	43
PID 1844 wrote to memory of 1712	1844	taskeng.exe	44
PID 1844 wrote to memory of 1712	1844	taskeng.exe	44
PID 1844 wrote to memory of 1712	1844	taskeng.exe	44

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\Ro-exec\loader-upd.exe
"C:\Users\Admin\AppData\Local\Temp\Ro-exec\loader-upd.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2188
- 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\Ro-exec\loader-upd.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2732
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'loader-upd.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2548
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\svchost.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1800
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2276
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Public\svchost.exe"
  2⤵
  - Creates scheduled task(s)
  PID:3020

C:\Windows\system32\taskeng.exe
taskeng.exe {59C60F89-4D11-47F3-ADC5-977D9EDE21C7} S-1-5-21-3452737119-3959686427-228443150-1000:QGTQZTRE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1844
- C:\Users\Public\svchost.exe
  C:\Users\Public\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1364
- C:\Users\Public\svchost.exe
  C:\Users\Public\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:600
- C:\Users\Public\svchost.exe
  C:\Users\Public\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1712

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
a73dc407f4f24a5c6a4d96138c567616

SHA1
0719f6c4a81f5d3a2dc04fbd3d688682a7613d70

SHA256
8251e97be47b181909b55ede70d4da75d64467e720fbf00d1842a9ec507b85a5

SHA512
0f0ba706adeb7f12c0598a1cbc8bb979d67111efff7b4bfb2bf2fd40fa7c70b648ebaef8454b8d7cd8baea7e291eccf4009c145d7aa782509000b64804c39a19

Download Submit
C:\Users\Public\svchost.exe

Filesize
70KB

MD5
573bd20fc8382d92a7ae9eae51e738e3

SHA1
55006093429df791f27e91a66e5ee63a81382b28

SHA256
09036ffa342f9e5bb1e31a867dcc3b60db011baba8c0d202aff1d33195cbe729

SHA512
d38736acff4128d6ce9ea17ee609ca33a37ac88f2c994cf4caf7f0eb62406a8963c33531b9f3cd020974d892c2751f3a4f67ce13ed6ba6080f97c406ccbb4aca

Download Submit
memory/600-64-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/600-63-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/1364-61-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/1364-60-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/1364-58-0x0000000001080000-0x0000000001098000-memory.dmp

Filesize
96KB

Download
memory/1712-66-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/1800-36-0x0000000002960000-0x00000000029E0000-memory.dmp

Filesize
512KB

Download
memory/1800-33-0x000007FEEEBB0000-0x000007FEEF54D000-memory.dmp

Filesize
9.6MB

Download
memory/1800-39-0x000007FEEEBB0000-0x000007FEEF54D000-memory.dmp

Filesize
9.6MB

Download
memory/1800-35-0x000007FEEEBB0000-0x000007FEEF54D000-memory.dmp

Filesize
9.6MB

Download
memory/1800-38-0x0000000002960000-0x00000000029E0000-memory.dmp

Filesize
512KB

Download
memory/1800-37-0x0000000002960000-0x00000000029E0000-memory.dmp

Filesize
512KB

Download
memory/1800-34-0x0000000002960000-0x00000000029E0000-memory.dmp

Filesize
512KB

Download
memory/2188-53-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/2188-0-0x0000000000830000-0x0000000000848000-memory.dmp

Filesize
96KB

Download
memory/2188-1-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/2188-59-0x000000001AB80000-0x000000001AC00000-memory.dmp

Filesize
512KB

Download
memory/2188-54-0x000000001AB80000-0x000000001AC00000-memory.dmp

Filesize
512KB

Download
memory/2276-47-0x0000000001DD0000-0x0000000001E50000-memory.dmp

Filesize
512KB

Download
memory/2276-50-0x0000000001DD0000-0x0000000001E50000-memory.dmp

Filesize
512KB

Download
memory/2276-51-0x000007FEEE210000-0x000007FEEEBAD000-memory.dmp

Filesize
9.6MB

Download
memory/2276-49-0x0000000001DD0000-0x0000000001E50000-memory.dmp

Filesize
512KB

Download
memory/2276-48-0x000007FEEE210000-0x000007FEEEBAD000-memory.dmp

Filesize
9.6MB

Download
memory/2276-46-0x000007FEEE210000-0x000007FEEEBAD000-memory.dmp

Filesize
9.6MB

Download
memory/2548-20-0x000000001B730000-0x000000001BA12000-memory.dmp

Filesize
2.9MB

Download
memory/2548-26-0x00000000028F0000-0x0000000002970000-memory.dmp

Filesize
512KB

Download
memory/2548-25-0x00000000028F0000-0x0000000002970000-memory.dmp

Filesize
512KB

Download
memory/2548-21-0x000007FEEE210000-0x000007FEEEBAD000-memory.dmp

Filesize
9.6MB

Download
memory/2548-24-0x000007FEEE210000-0x000007FEEEBAD000-memory.dmp

Filesize
9.6MB

Download
memory/2548-22-0x0000000001F40000-0x0000000001F48000-memory.dmp

Filesize
32KB

Download
memory/2548-23-0x00000000028F0000-0x0000000002970000-memory.dmp

Filesize
512KB

Download
memory/2548-27-0x000007FEEE210000-0x000007FEEEBAD000-memory.dmp

Filesize
9.6MB

Download
memory/2732-12-0x0000000002810000-0x0000000002890000-memory.dmp

Filesize
512KB

Download
memory/2732-13-0x0000000002810000-0x0000000002890000-memory.dmp

Filesize
512KB

Download
memory/2732-10-0x000007FEEEBB0000-0x000007FEEF54D000-memory.dmp

Filesize
9.6MB

Download
memory/2732-14-0x000007FEEEBB0000-0x000007FEEF54D000-memory.dmp

Filesize
9.6MB

Download
memory/2732-8-0x000007FEEEBB0000-0x000007FEEF54D000-memory.dmp

Filesize
9.6MB

Download
memory/2732-9-0x0000000002810000-0x0000000002890000-memory.dmp

Filesize
512KB

Download
memory/2732-6-0x000000001B650000-0x000000001B932000-memory.dmp

Filesize
2.9MB

Download
memory/2732-7-0x00000000027E0000-0x00000000027E8000-memory.dmp

Filesize
32KB

Download
memory/2732-11-0x0000000002810000-0x0000000002890000-memory.dmp

Filesize
512KB

Download