xworm | 137372fa011a0dd39cc61ef4924fbaf23ac1d2f256a1a121c6de8bc3e08cddbb

General

Target

FearstCheat.exe
Size

1.7MB
MD5

0588341217749d543c1d9808ae996a93
SHA1

b0597e54d0c9a9c031d2c4f04e154e4e329f829e
SHA256

137372fa011a0dd39cc61ef4924fbaf23ac1d2f256a1a121c6de8bc3e08cddbb
SHA512

acc4f8dd88f1cbe79c0e374eb60674c5ccc324d97bda85b392a26177566a6c24390c5511535da66a6871e1c0c2a4d2bec180c08785b6d22e5d2cf39426a36248
SSDEEP

49152:Jdn9ScjutnACJUB7ngHHZSlwM0iKcK7UBbquuRJ:Jd9S5ZRt7U

Score

10^/10

xworm discovery execution rat trojan

Malware Config

Extracted

Family

xworm

C2

192.168.223.129:4935

Attributes

Install_directory
%AppData%
install_file
$77.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/4748-7-0x0000000000400000-0x0000000000416000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

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

execution

PowerShell

T1059.001

pid	Process
3440	powershell.exe

.NET Reactor proctector 1 IoCs

Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

resource	yara_rule
behavioral1/memory/4944-1-0x0000000000E50000-0x0000000001000000-memory.dmp	net_reactor

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\%startupname%.lnk	FearstCheat.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4944 set thread context of 4748	4944	FearstCheat.exe	75

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

System Information Discovery
T1082

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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FearstCheat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
3440	powershell.exe
3440	powershell.exe
3440	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4748	MSBuild.exe
Token: SeDebugPrivilege	3440	powershell.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4944 wrote to memory of 4748	4944	FearstCheat.exe	75
PID 4944 wrote to memory of 4748	4944	FearstCheat.exe	75
PID 4944 wrote to memory of 4748	4944	FearstCheat.exe	75
PID 4944 wrote to memory of 4748	4944	FearstCheat.exe	75
PID 4944 wrote to memory of 4748	4944	FearstCheat.exe	75
PID 4944 wrote to memory of 4748	4944	FearstCheat.exe	75
PID 4944 wrote to memory of 4748	4944	FearstCheat.exe	75
PID 4944 wrote to memory of 4748	4944	FearstCheat.exe	75
PID 4748 wrote to memory of 3440	4748	MSBuild.exe	76
PID 4748 wrote to memory of 3440	4748	MSBuild.exe	76
PID 4748 wrote to memory of 3440	4748	MSBuild.exe	76

C:\Users\Admin\AppData\Local\Temp\FearstCheat.exe
"C:\Users\Admin\AppData\Local\Temp\FearstCheat.exe"
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4944
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4748
- - 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\MSBuild.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3440

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 Information Discovery

1

T1082

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\Local\Temp\__PSScriptPolicyTest_i0252kpl.d5x.ps1

Filesize
1B

MD5
c4ca4238a0b923820dcc509a6f75849b

SHA1
356a192b7913b04c54574d18c28d46e6395428ab

SHA256
6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

SHA512
4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

Download Submit
memory/3440-14-0x0000000006C40000-0x0000000007268000-memory.dmp

Filesize
6.2MB

Download
memory/3440-21-0x0000000007B00000-0x0000000007B76000-memory.dmp

Filesize
472KB

Download
memory/3440-20-0x0000000007DD0000-0x0000000007E1B000-memory.dmp

Filesize
300KB

Download
memory/3440-19-0x00000000073A0000-0x00000000073BC000-memory.dmp

Filesize
112KB

Download
memory/3440-18-0x00000000074C0000-0x0000000007810000-memory.dmp

Filesize
3.3MB

Download
memory/3440-17-0x0000000007450000-0x00000000074B6000-memory.dmp

Filesize
408KB

Download
memory/3440-16-0x0000000006B90000-0x0000000006BF6000-memory.dmp

Filesize
408KB

Download
memory/3440-15-0x0000000006A70000-0x0000000006A92000-memory.dmp

Filesize
136KB

Download
memory/3440-13-0x0000000004140000-0x0000000004176000-memory.dmp

Filesize
216KB

Download
memory/4748-10-0x0000000073400000-0x0000000073AEE000-memory.dmp

Filesize
6.9MB

Download
memory/4748-7-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/4944-0-0x000000007340E000-0x000000007340F000-memory.dmp

Filesize
4KB

Download
memory/4944-9-0x0000000073400000-0x0000000073AEE000-memory.dmp

Filesize
6.9MB

Download
memory/4944-6-0x00000000060A0000-0x0000000006156000-memory.dmp

Filesize
728KB

Download
memory/4944-4-0x0000000006520000-0x0000000006A1E000-memory.dmp

Filesize
5.0MB

Download
memory/4944-3-0x0000000005900000-0x000000000599C000-memory.dmp

Filesize
624KB

Download
memory/4944-2-0x0000000073400000-0x0000000073AEE000-memory.dmp

Filesize
6.9MB

Download
memory/4944-1-0x0000000000E50000-0x0000000001000000-memory.dmp

Filesize
1.7MB

Download

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