xworm | d9acb8fc36fb78b72c6c51a753bac529acc7a00fe2ab64b2e5d98c3771884081

General

Target

Request for Quotation.pdf.exe
Size

1.6MB
MD5

e431cc534657e37b3e84065eba53105e
SHA1

fc88bf55a27ca270c2c2dc721c64da6966a0a5c1
SHA256

0e4aa3896358b32016c903f837a762052757ebeeb525b4077062864710de329a
SHA512

4894c6dc19987f1b2e902cfa7314de8c179c85135fcd48ee103def925316e9f15fe65bd990c9c61d61a70672b7c1cff30c6c1ff751654f63327b9a2ce1016c03
SSDEEP

12288:C27f6PD2zYzh+FoVIx+AEA4KLvSt6xjplsi:Vf8xzwFdx+Y4kvF5si

Score

10^/10

xworm discovery execution rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

C2

kanrplest.duckdns.org:4068

Mutex

TdUxMCK2FUdy51AH

Attributes

Install_directory
%AppData%
install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/2788-10-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm
behavioral1/memory/2788-17-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm
behavioral1/memory/2788-15-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm
behavioral1/memory/2788-13-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm
behavioral1/memory/2788-8-0x0000000000400000-0x0000000000410000-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
2644	powershell.exe
2720	powershell.exe
2724	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2160 set thread context of 2788	2160	Request for Quotation.pdf.exe	31

System Location Discovery: System Language Discovery 1 TTPs 2 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	regsvcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2160	Request for Quotation.pdf.exe
Token: SeDebugPrivilege	2788	regsvcs.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2160 wrote to memory of 2788	2160	Request for Quotation.pdf.exe	31
PID 2160 wrote to memory of 2788	2160	Request for Quotation.pdf.exe	31
PID 2160 wrote to memory of 2788	2160	Request for Quotation.pdf.exe	31
PID 2160 wrote to memory of 2788	2160	Request for Quotation.pdf.exe	31
PID 2160 wrote to memory of 2788	2160	Request for Quotation.pdf.exe	31
PID 2160 wrote to memory of 2788	2160	Request for Quotation.pdf.exe	31
PID 2160 wrote to memory of 2788	2160	Request for Quotation.pdf.exe	31
PID 2160 wrote to memory of 2788	2160	Request for Quotation.pdf.exe	31
PID 2160 wrote to memory of 2788	2160	Request for Quotation.pdf.exe	31
PID 2160 wrote to memory of 2788	2160	Request for Quotation.pdf.exe	31
PID 2160 wrote to memory of 2788	2160	Request for Quotation.pdf.exe	31
PID 2160 wrote to memory of 2788	2160	Request for Quotation.pdf.exe	31
PID 2160 wrote to memory of 2588	2160	Request for Quotation.pdf.exe	32
PID 2160 wrote to memory of 2588	2160	Request for Quotation.pdf.exe	32
PID 2160 wrote to memory of 2588	2160	Request for Quotation.pdf.exe	32
PID 2788 wrote to memory of 2720	2788	regsvcs.exe	33
PID 2788 wrote to memory of 2720	2788	regsvcs.exe	33
PID 2788 wrote to memory of 2720	2788	regsvcs.exe	33
PID 2788 wrote to memory of 2720	2788	regsvcs.exe	33

C:\Users\Admin\AppData\Local\Temp\Request for Quotation.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Request for Quotation.pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2160
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2788
- - 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
    PID:2720
- - 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
    PID:2724
- - 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
    PID:2644
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 2160 -s 624
  2⤵
  PID:2588

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
7KB

MD5
4d1faa5a61eac8950837affd156a76c1

SHA1
19557fa71a7ea0cb89df12fa06553552fcde3a72

SHA256
8a69b7e2a0c2770be7b52a9d4aac9eb5473598451b05773e26629369120db130

SHA512
255026b7dcb0442b3e8a683a66ca546e6ad93f4710c64e96ef9c725be3ec65f3ab36d41ea0a2d4a36dd0eb24dad2a384fc22dd0cab73497ec90c64ceaa235b1b

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

Filesize
44KB

MD5
0e06054beb13192588e745ee63a84173

SHA1
30b7d4d1277bafd04a83779fd566a1f834a8d113

SHA256
c5d6d56ded55fbd6c150ee3a0eb2e5671cae83106be2be4d70ce50aa50bab768

SHA512
251a112f3f037e62ff67a467389e47a56afb344bc942b17efa9bd2970494718b26bbee9adc3ac35f93ee4d2114aa426b6d0ea4bafad294b6c118a15f1977c215

Download Submit
memory/2160-0-0x000007FEF57C3000-0x000007FEF57C4000-memory.dmp

Filesize
4KB

Download
memory/2160-1-0x00000000013B0000-0x00000000013C2000-memory.dmp

Filesize
72KB

Download
memory/2160-2-0x0000000000590000-0x00000000005F2000-memory.dmp

Filesize
392KB

Download
memory/2160-3-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/2160-21-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/2788-13-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2788-15-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2788-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2788-6-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2788-4-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2788-8-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2788-18-0x000000007441E000-0x000000007441F000-memory.dmp

Filesize
4KB

Download
memory/2788-17-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2788-10-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2788-39-0x0000000074410000-0x0000000074AFE000-memory.dmp

Filesize
6.9MB

Download
memory/2788-40-0x000000007441E000-0x000000007441F000-memory.dmp

Filesize
4KB

Download
memory/2788-41-0x0000000074410000-0x0000000074AFE000-memory.dmp

Filesize
6.9MB

Download

Analysis

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