Malware Analysis Report

2024-11-16 13:40

Sample ID 240531-eklhhsed5w
Target sigmasoft-0.1xw.exe
SHA256 81b460bce1126aaeee941fa6fb3945bacd058d56549443db236bd790661dae3a
Tags
xworm execution persistence rat trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

81b460bce1126aaeee941fa6fb3945bacd058d56549443db236bd790661dae3a

Threat Level: Known bad

The file sigmasoft-0.1xw.exe was found to be: Known bad.

Malicious Activity Summary

xworm execution persistence rat trojan

Detect Xworm Payload

Xworm

Xworm family

Command and Scripting Interpreter: PowerShell

Checks computer location settings

Drops startup file

Executes dropped EXE

Adds Run key to start application

Enumerates physical storage devices

Unsigned PE

Suspicious use of SetWindowsHookEx

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

Uses Task Scheduler COM API

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-31 03:59

Signatures

Detect Xworm Payload

Description Indicator Process Target
N/A N/A N/A N/A

Xworm family

xworm

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-31 03:59

Reported

2024-05-31 04:01

Platform

win7-20240221-en

Max time kernel

59s

Max time network

32s

Command Line

"C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe"

Signatures

Detect Xworm Payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Xworm

trojan rat xworm

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\svchost.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost.exe" C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\System32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A
Token: SeDebugPrivilege N/A C:\ProgramData\svchost.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1848 wrote to memory of 2924 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1848 wrote to memory of 2924 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1848 wrote to memory of 2924 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1848 wrote to memory of 2520 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1848 wrote to memory of 2520 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1848 wrote to memory of 2520 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1848 wrote to memory of 2468 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1848 wrote to memory of 2468 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1848 wrote to memory of 2468 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1848 wrote to memory of 2380 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1848 wrote to memory of 2380 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1848 wrote to memory of 2380 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1848 wrote to memory of 1512 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\schtasks.exe
PID 1848 wrote to memory of 1512 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\schtasks.exe
PID 1848 wrote to memory of 1512 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\schtasks.exe
PID 2796 wrote to memory of 2400 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\svchost.exe
PID 2796 wrote to memory of 2400 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\svchost.exe
PID 2796 wrote to memory of 2400 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\svchost.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe

"C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe"

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\sigmasoft-0.1xw.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'sigmasoft-0.1xw.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\svchost.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {4127EAE2-2CEA-45B6-BF9B-70458632DB17} S-1-5-21-2297530677-1229052932-2803917579-1000:HKULBIBU\Admin:Interactive:[1]

C:\ProgramData\svchost.exe

C:\ProgramData\svchost.exe

Network

Country Destination Domain Proto
N/A 127.0.0.1:42772 tcp
US 8.8.8.8:53 gorodpro-42772.portmap.host udp
DE 193.161.193.99:42772 gorodpro-42772.portmap.host tcp
N/A 127.0.0.1:42772 tcp
N/A 127.0.0.1:42772 tcp
N/A 127.0.0.1:42772 tcp
DE 193.161.193.99:42772 tcp

Files

memory/1848-0-0x000007FEF5A13000-0x000007FEF5A14000-memory.dmp

memory/1848-1-0x0000000000E00000-0x0000000000E18000-memory.dmp

memory/2924-6-0x0000000002C30000-0x0000000002CB0000-memory.dmp

memory/2924-7-0x000000001B5D0000-0x000000001B8B2000-memory.dmp

memory/2924-8-0x0000000002800000-0x0000000002808000-memory.dmp

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

MD5 6b312cb6838810b673f41810efe50d3f
SHA1 da9a390dc2b34a755b68d7b00b5f5e6e38100fbe
SHA256 0e23a10fd512b937fa2ee82daa32b58edaf597de3723dfd9e4822e2048aef2c6
SHA512 bfb2092ab19beb31fd32b7c14e1aad51e8ffbc6e3a8c03a2a94e4866d341c97f7e2173046755efc9070085d735ef2fdbd3a5a0e363247974527b98c079b511f6

memory/2520-14-0x000000001B630000-0x000000001B912000-memory.dmp

memory/2520-15-0x0000000001F00000-0x0000000001F08000-memory.dmp

\??\PIPE\srvsvc

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

memory/1848-31-0x000000001B250000-0x000000001B2D0000-memory.dmp

memory/1848-32-0x000007FEF5A13000-0x000007FEF5A14000-memory.dmp

memory/1848-33-0x000000001B250000-0x000000001B2D0000-memory.dmp

C:\ProgramData\svchost.exe

MD5 6538116da6dcf30ee794597963b20207
SHA1 6ff33f12ea69fc818b2b633a46dafc9ac47cd1a8
SHA256 81b460bce1126aaeee941fa6fb3945bacd058d56549443db236bd790661dae3a
SHA512 ce0cab07f94532a446a72f5b1b3b125a64e03861bb48b48daf5f392001afc72e0f960bc9576515063b7ada294d3b44edd08f0bd618418d4e56c0eb2f65ebaee3

memory/2400-37-0x00000000012A0000-0x00000000012B8000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-31 03:59

Reported

2024-05-31 04:01

Platform

win10v2004-20240426-en

Max time kernel

56s

Max time network

46s

Command Line

"C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe"

Signatures

Detect Xworm Payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Xworm

trojan rat xworm

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\svchost.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost.exe" C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\System32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A
Token: SeDebugPrivilege N/A C:\ProgramData\svchost.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4604 wrote to memory of 4136 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4604 wrote to memory of 4136 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4604 wrote to memory of 2124 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4604 wrote to memory of 2124 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4604 wrote to memory of 1380 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4604 wrote to memory of 1380 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4604 wrote to memory of 2224 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4604 wrote to memory of 2224 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4604 wrote to memory of 536 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\schtasks.exe
PID 4604 wrote to memory of 536 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe

"C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe"

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\sigmasoft-0.1xw.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'sigmasoft-0.1xw.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\svchost.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost.exe"

C:\ProgramData\svchost.exe

C:\ProgramData\svchost.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 25.24.18.2.in-addr.arpa udp
US 8.8.8.8:53 68.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 gorodpro-42772.portmap.host udp
DE 193.161.193.99:42772 gorodpro-42772.portmap.host tcp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 99.193.161.193.in-addr.arpa udp
N/A 127.0.0.1:42772 tcp
N/A 127.0.0.1:42772 tcp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
DE 193.161.193.99:42772 gorodpro-42772.portmap.host tcp
DE 193.161.193.99:42772 gorodpro-42772.portmap.host tcp
N/A 127.0.0.1:42772 tcp

Files

memory/4604-0-0x00007FFB74973000-0x00007FFB74975000-memory.dmp

memory/4604-1-0x0000000000A60000-0x0000000000A78000-memory.dmp

memory/4136-2-0x0000022CA76C0000-0x0000022CA76E2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_iybjs0r0.gmh.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4136-12-0x00007FFB74970000-0x00007FFB75431000-memory.dmp

memory/4136-13-0x00007FFB74970000-0x00007FFB75431000-memory.dmp

memory/4136-14-0x00007FFB74970000-0x00007FFB75431000-memory.dmp

memory/4136-17-0x00007FFB74970000-0x00007FFB75431000-memory.dmp

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

MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

MD5 d28a889fd956d5cb3accfbaf1143eb6f
SHA1 157ba54b365341f8ff06707d996b3635da8446f7
SHA256 21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45
SHA512 0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

MD5 da5c82b0e070047f7377042d08093ff4
SHA1 89d05987cd60828cca516c5c40c18935c35e8bd3
SHA256 77a94ef8c4258445d538a6006ffadb05afdf888f6f044e1e5466b981a07f16c5
SHA512 7360311a3c97b73dd3f6d7179cd979e0e20d69f380d38292447e17e369087d9dd5acb66cd0cbdd95ac4bfb16e5a1b86825f835a8d45b14ea9812102cff59704b

memory/4604-56-0x00007FFB74970000-0x00007FFB75431000-memory.dmp

memory/4604-57-0x00007FFB74973000-0x00007FFB74975000-memory.dmp

memory/4604-58-0x00007FFB74970000-0x00007FFB75431000-memory.dmp

C:\ProgramData\svchost.exe

MD5 6538116da6dcf30ee794597963b20207
SHA1 6ff33f12ea69fc818b2b633a46dafc9ac47cd1a8
SHA256 81b460bce1126aaeee941fa6fb3945bacd058d56549443db236bd790661dae3a
SHA512 ce0cab07f94532a446a72f5b1b3b125a64e03861bb48b48daf5f392001afc72e0f960bc9576515063b7ada294d3b44edd08f0bd618418d4e56c0eb2f65ebaee3