xworm | 3721299ab8cab7453d4781c5d3acc4304dffd8335164fbdfc31c80959cb0b35b

Analysis

max time kernel
117s
max time network
148s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
31/10/2024, 10:09

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General

Target

ORDER REF_47806798 .exe
Size

1.1MB
MD5

b1409192281b85ae112868f828087864
SHA1

a6e85b73dfbc0494f435fe2e78bdb4977a4a2fe5
SHA256

3721299ab8cab7453d4781c5d3acc4304dffd8335164fbdfc31c80959cb0b35b
SHA512

509ad61d75da81b46ce50ab32f787b6bbf0763a5dfe9e7c2ce0791b7a5006af8529c3b54fb3ec76a3709dbf8b9562b1150fae50a59bf9eb2f56529b98ea56ebf
SSDEEP

12288:1CaR45KgL9fLyT+o2+gmuQIIq65/PKtfCnbMtqL:c2gBfLxHBQIf6pihCIc

Score

10^/10

xworm discovery execution rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

176.9.162.125:4060

Mutex

4ZrqftQk1xSTve1a

Attributes

Install_directory
%AppData%
install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/276-9-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm
behavioral1/memory/276-15-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm
behavioral1/memory/276-13-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm
behavioral1/memory/276-11-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm
behavioral1/memory/276-8-0x0000000000400000-0x0000000000410000-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 3 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1028	powershell.exe
3024	powershell.exe
2612	powershell.exe

Drops startup file 2 IoCs

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

Loads dropped DLL 1 IoCs

pid	Process
276	regsvcs.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2392 set thread context of 276	2392	ORDER REF_47806798 .exe	31

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1028	powershell.exe
3024	powershell.exe
2612	powershell.exe
276	regsvcs.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2392	ORDER REF_47806798 .exe
Token: SeDebugPrivilege	276	regsvcs.exe
Token: SeDebugPrivilege	1028	powershell.exe
Token: SeDebugPrivilege	3024	powershell.exe
Token: SeDebugPrivilege	2612	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
276	regsvcs.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2392 wrote to memory of 276	2392	ORDER REF_47806798 .exe	31
PID 2392 wrote to memory of 276	2392	ORDER REF_47806798 .exe	31
PID 2392 wrote to memory of 276	2392	ORDER REF_47806798 .exe	31
PID 2392 wrote to memory of 276	2392	ORDER REF_47806798 .exe	31
PID 2392 wrote to memory of 276	2392	ORDER REF_47806798 .exe	31
PID 2392 wrote to memory of 276	2392	ORDER REF_47806798 .exe	31
PID 2392 wrote to memory of 276	2392	ORDER REF_47806798 .exe	31
PID 2392 wrote to memory of 276	2392	ORDER REF_47806798 .exe	31
PID 2392 wrote to memory of 276	2392	ORDER REF_47806798 .exe	31
PID 2392 wrote to memory of 276	2392	ORDER REF_47806798 .exe	31
PID 2392 wrote to memory of 276	2392	ORDER REF_47806798 .exe	31
PID 2392 wrote to memory of 276	2392	ORDER REF_47806798 .exe	31
PID 2392 wrote to memory of 2236	2392	ORDER REF_47806798 .exe	32
PID 2392 wrote to memory of 2236	2392	ORDER REF_47806798 .exe	32
PID 2392 wrote to memory of 2236	2392	ORDER REF_47806798 .exe	32
PID 276 wrote to memory of 1028	276	regsvcs.exe	34
PID 276 wrote to memory of 1028	276	regsvcs.exe	34
PID 276 wrote to memory of 1028	276	regsvcs.exe	34
PID 276 wrote to memory of 1028	276	regsvcs.exe	34
PID 276 wrote to memory of 3024	276	regsvcs.exe	36
PID 276 wrote to memory of 3024	276	regsvcs.exe	36
PID 276 wrote to memory of 3024	276	regsvcs.exe	36
PID 276 wrote to memory of 3024	276	regsvcs.exe	36
PID 276 wrote to memory of 2612	276	regsvcs.exe	38
PID 276 wrote to memory of 2612	276	regsvcs.exe	38
PID 276 wrote to memory of 2612	276	regsvcs.exe	38
PID 276 wrote to memory of 2612	276	regsvcs.exe	38

C:\Users\Admin\AppData\Local\Temp\ORDER REF_47806798 .exe
"C:\Users\Admin\AppData\Local\Temp\ORDER REF_47806798 .exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2392
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe"
  2⤵
  - Drops startup file
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:276
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1028
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'regsvcs.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3024
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\regsvcs.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2612
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 2392 -s 616
  2⤵
  PID:2236

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
cdbc39ad4cc4e0323a04d84d26824641

SHA1
46afcb05e677f0aeb937903b8d489cae25574eb6

SHA256
62422555fda20227d3812159ecab93455eb6baaff601ed40048fe42c4aa397a2

SHA512
888707c7dcc374e935b4eb97384f11431ce29b81a76f23c0283e602f763cc72d59cfdfddec2ae268aa11af80c491288db94eb77bef66413f7df747afb958967e

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

Filesize
44KB

MD5
0e06054beb13192588e745ee63a84173

SHA1
30b7d4d1277bafd04a83779fd566a1f834a8d113

SHA256
c5d6d56ded55fbd6c150ee3a0eb2e5671cae83106be2be4d70ce50aa50bab768

SHA512
251a112f3f037e62ff67a467389e47a56afb344bc942b17efa9bd2970494718b26bbee9adc3ac35f93ee4d2114aa426b6d0ea4bafad294b6c118a15f1977c215

Download Submit
memory/276-15-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/276-8-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/276-4-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/276-6-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/276-9-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/276-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/276-37-0x0000000074220000-0x000000007490E000-memory.dmp

Filesize
6.9MB

Download
memory/276-13-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/276-11-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/276-36-0x000000007422E000-0x000000007422F000-memory.dmp

Filesize
4KB

Download
memory/276-16-0x000000007422E000-0x000000007422F000-memory.dmp

Filesize
4KB

Download
memory/276-35-0x0000000074220000-0x000000007490E000-memory.dmp

Filesize
6.9MB

Download
memory/2392-2-0x0000000000550000-0x00000000005B2000-memory.dmp

Filesize
392KB

Download
memory/2392-1-0x0000000000200000-0x0000000000214000-memory.dmp

Filesize
80KB

Download
memory/2392-19-0x000007FEF53B0000-0x000007FEF5D9C000-memory.dmp

Filesize
9.9MB

Download
memory/2392-3-0x000007FEF53B0000-0x000007FEF5D9C000-memory.dmp

Filesize
9.9MB

Download
memory/2392-0-0x000007FEF53B3000-0x000007FEF53B4000-memory.dmp

Filesize
4KB

Download