xworm | b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be

General

Target

b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe
Size

1.3MB
MD5

5e8c689ae7f342a2b2dcf76ad9f990d4
SHA1

dc659d8c8284c0ec2d5cd4b0c4dd3a250d481331
SHA256

b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be
SHA512

46bd683b51c45cc92d5b35c236d8e339ab808cd87465eebd7f1a96ccdb28f994e0048a185a46a68dfd106e6fdd6e46a75c85caea180c03ac20ca2e3e778e64c9
SSDEEP

12288:0kjmrocDPyNhuTsAGBDNMrRbeyBYidXG4LrXFb2N:0ZbPyNqsAwyFCreDJKN

Score

10^/10

xworm discovery execution rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

C2

savelat19847.duckdns.org:7000

Mutex

6FO7gyeQQmt4IGRZ

Attributes

install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/2796-10-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm
behavioral1/memory/2796-8-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm
behavioral1/memory/2796-13-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm
behavioral1/memory/2796-15-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm
behavioral1/memory/2796-17-0x0000000000400000-0x000000000040E000-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 2 IoCs

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

execution

PowerShell

T1059.001

pid	Process
780	powershell.exe
2712	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2644 set thread context of 2796	2644	b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe	30

System Location Discovery: System Language Discovery 1 TTPs 3 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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2712	powershell.exe
780	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2796	regsvcs.exe
Token: SeDebugPrivilege	2712	powershell.exe
Token: SeDebugPrivilege	780	powershell.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2644 wrote to memory of 2796	2644	b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe	30
PID 2644 wrote to memory of 2796	2644	b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe	30
PID 2644 wrote to memory of 2796	2644	b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe	30
PID 2644 wrote to memory of 2796	2644	b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe	30
PID 2644 wrote to memory of 2796	2644	b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe	30
PID 2644 wrote to memory of 2796	2644	b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe	30
PID 2644 wrote to memory of 2796	2644	b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe	30
PID 2644 wrote to memory of 2796	2644	b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe	30
PID 2644 wrote to memory of 2796	2644	b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe	30
PID 2644 wrote to memory of 2796	2644	b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe	30
PID 2644 wrote to memory of 2796	2644	b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe	30
PID 2644 wrote to memory of 2796	2644	b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe	30
PID 2644 wrote to memory of 2404	2644	b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe	31
PID 2644 wrote to memory of 2404	2644	b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe	31
PID 2644 wrote to memory of 2404	2644	b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe	31
PID 2796 wrote to memory of 2712	2796	regsvcs.exe	32
PID 2796 wrote to memory of 2712	2796	regsvcs.exe	32
PID 2796 wrote to memory of 2712	2796	regsvcs.exe	32
PID 2796 wrote to memory of 2712	2796	regsvcs.exe	32
PID 2796 wrote to memory of 780	2796	regsvcs.exe	34
PID 2796 wrote to memory of 780	2796	regsvcs.exe	34
PID 2796 wrote to memory of 780	2796	regsvcs.exe	34
PID 2796 wrote to memory of 780	2796	regsvcs.exe	34

C:\Users\Admin\AppData\Local\Temp\b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe
"C:\Users\Admin\AppData\Local\Temp\b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2644
- 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:2796
- - 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:2712
- - 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:780
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 2644 -s 656
  2⤵
  PID:2404

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
b7c9903c67d6d770adcf13210e1e9b70

SHA1
c731455e7844d16c45309a99cd3ee9544badc041

SHA256
2aa4ecab89739abaa8cfa44c8c6768a4a0aeb3715eaa2e957fb9ada6dab2e0c8

SHA512
d03717e32b0fa91cc8035485f304ae05df16ab96b1af27cbffee0c13c9bd496e7abed640b9b9175e29495e51f388e296f94746323aaf14b95c2e2bfd52ba09f4

Download Submit
memory/2644-0-0x000007FEF6453000-0x000007FEF6454000-memory.dmp

Filesize
4KB

Download
memory/2644-1-0x0000000000090000-0x0000000000098000-memory.dmp

Filesize
32KB

Download
memory/2644-3-0x000007FEF6450000-0x000007FEF6E3C000-memory.dmp

Filesize
9.9MB

Download
memory/2644-2-0x00000000004D0000-0x0000000000530000-memory.dmp

Filesize
384KB

Download
memory/2644-27-0x000007FEF6450000-0x000007FEF6E3C000-memory.dmp

Filesize
9.9MB

Download
memory/2796-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2796-6-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2796-8-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2796-13-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2796-15-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2796-17-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2796-18-0x000000007491E000-0x000000007491F000-memory.dmp

Filesize
4KB

Download
memory/2796-10-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2796-26-0x0000000074910000-0x0000000074FFE000-memory.dmp

Filesize
6.9MB

Download
memory/2796-4-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2796-28-0x000000007491E000-0x000000007491F000-memory.dmp

Filesize
4KB

Download
memory/2796-29-0x0000000074910000-0x0000000074FFE000-memory.dmp

Filesize
6.9MB

Download

Analysis

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