quasar | eee98aabaf632f6d85b08f40401058696980c57a60bbf57ffae069e6ee1b827c

Analysis

max time kernel
32s
max time network
33s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
22-01-2025 17:28

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General

Target

soft 1.14.exe
Size

2.6MB
MD5

0c8c53fc87610174bd8d304940ed84dd
SHA1

e049d2b70beec23414f252d3aab26f179e1573bc
SHA256

eee98aabaf632f6d85b08f40401058696980c57a60bbf57ffae069e6ee1b827c
SHA512

7150b0f65b6bb01d8be8d36a49c08239950384aa4382bda387b8de733f3f4f0db9eabf148e85b9b11efaf60761be703a6c28fdfdc6df87b03db6fb96acc4380e
SSDEEP

49152:b+PPOOZeF0a/ICoVrIdEXZe1pVhZ88hfOKx/13ZvTIqab7SNudXjdTF:HOk0axoVrIuXytKtKTrROJF

Score

10^/10

quasar bild discovery execution spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

bild

147.45.44.184:4782

Mutex

c3e182b5-304a-49a7-85b2-6d514cf6f590

Attributes

encryption_key
7248469493201CDB45E041FBAB664BCC303EC021
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

resource	yara_rule
behavioral1/memory/2704-72-0x000000001B960000-0x000000001BC84000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
1256	soft 1.14.tmp
800	soft 1.14.tmp

Loads dropped DLL 10 IoCs

pid	Process
2396	soft 1.14.exe
1256	soft 1.14.tmp
1256	soft 1.14.tmp
1256	soft 1.14.tmp
2372	soft 1.14.exe
800	soft 1.14.tmp
800	soft 1.14.tmp
800	soft 1.14.tmp
2984	regsvr32.exe
2704	regsvr32.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell to execute payload.

execution

PowerShell

T1059.001

pid	Process
2348	powershell.exe
2868	powershell.exe
2868	powershell.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.exe
File opened for modification	C:\Windows\System32\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	soft 1.14.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	soft 1.14.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AcroRd32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	soft 1.14.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	soft 1.14.tmp

Modifies registry class 9 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000_CLASSES\mpeg3_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000_CLASSES\.mpeg3	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000_CLASSES\.mpeg3\ = "mpeg3_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000_CLASSES\mpeg3_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000_CLASSES\mpeg3_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000_CLASSES\mpeg3_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000_CLASSES\mpeg3_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000_CLASSES\mpeg3_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
800	soft 1.14.tmp
800	soft 1.14.tmp
2704	regsvr32.exe
2348	powershell.exe
2868	powershell.exe
2704	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2348	powershell.exe
Token: SeDebugPrivilege	2868	powershell.exe
Token: SeDebugPrivilege	2704	regsvr32.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
800	soft 1.14.tmp

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2028	AcroRd32.exe
2028	AcroRd32.exe

Suspicious use of WriteProcessMemory 45 IoCs

description	pid	Process	procid_target
PID 2396 wrote to memory of 1256	2396	soft 1.14.exe	30
PID 2396 wrote to memory of 1256	2396	soft 1.14.exe	30
PID 2396 wrote to memory of 1256	2396	soft 1.14.exe	30
PID 2396 wrote to memory of 1256	2396	soft 1.14.exe	30
PID 2396 wrote to memory of 1256	2396	soft 1.14.exe	30
PID 2396 wrote to memory of 1256	2396	soft 1.14.exe	30
PID 2396 wrote to memory of 1256	2396	soft 1.14.exe	30
PID 1256 wrote to memory of 2372	1256	soft 1.14.tmp	31
PID 1256 wrote to memory of 2372	1256	soft 1.14.tmp	31
PID 1256 wrote to memory of 2372	1256	soft 1.14.tmp	31
PID 1256 wrote to memory of 2372	1256	soft 1.14.tmp	31
PID 1256 wrote to memory of 2372	1256	soft 1.14.tmp	31
PID 1256 wrote to memory of 2372	1256	soft 1.14.tmp	31
PID 1256 wrote to memory of 2372	1256	soft 1.14.tmp	31
PID 2372 wrote to memory of 800	2372	soft 1.14.exe	32
PID 2372 wrote to memory of 800	2372	soft 1.14.exe	32
PID 2372 wrote to memory of 800	2372	soft 1.14.exe	32
PID 2372 wrote to memory of 800	2372	soft 1.14.exe	32
PID 2372 wrote to memory of 800	2372	soft 1.14.exe	32
PID 2372 wrote to memory of 800	2372	soft 1.14.exe	32
PID 2372 wrote to memory of 800	2372	soft 1.14.exe	32
PID 800 wrote to memory of 2984	800	soft 1.14.tmp	33
PID 800 wrote to memory of 2984	800	soft 1.14.tmp	33
PID 800 wrote to memory of 2984	800	soft 1.14.tmp	33
PID 800 wrote to memory of 2984	800	soft 1.14.tmp	33
PID 800 wrote to memory of 2984	800	soft 1.14.tmp	33
PID 800 wrote to memory of 2984	800	soft 1.14.tmp	33
PID 800 wrote to memory of 2984	800	soft 1.14.tmp	33
PID 2984 wrote to memory of 2704	2984	regsvr32.exe	34
PID 2984 wrote to memory of 2704	2984	regsvr32.exe	34
PID 2984 wrote to memory of 2704	2984	regsvr32.exe	34
PID 2984 wrote to memory of 2704	2984	regsvr32.exe	34
PID 2984 wrote to memory of 2704	2984	regsvr32.exe	34
PID 2984 wrote to memory of 2704	2984	regsvr32.exe	34
PID 2984 wrote to memory of 2704	2984	regsvr32.exe	34
PID 2704 wrote to memory of 2348	2704	regsvr32.exe	35
PID 2704 wrote to memory of 2348	2704	regsvr32.exe	35
PID 2704 wrote to memory of 2348	2704	regsvr32.exe	35
PID 2704 wrote to memory of 2868	2704	regsvr32.exe	37
PID 2704 wrote to memory of 2868	2704	regsvr32.exe	37
PID 2704 wrote to memory of 2868	2704	regsvr32.exe	37
PID 1796 wrote to memory of 2028	1796	rundll32.exe	41
PID 1796 wrote to memory of 2028	1796	rundll32.exe	41
PID 1796 wrote to memory of 2028	1796	rundll32.exe	41
PID 1796 wrote to memory of 2028	1796	rundll32.exe	41

C:\Users\Admin\AppData\Local\Temp\soft 1.14.exe
"C:\Users\Admin\AppData\Local\Temp\soft 1.14.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2396
- C:\Users\Admin\AppData\Local\Temp\is-PDA8I.tmp\soft 1.14.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-PDA8I.tmp\soft 1.14.tmp" /SL5="$5014C,2280623,161792,C:\Users\Admin\AppData\Local\Temp\soft 1.14.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1256
- - C:\Users\Admin\AppData\Local\Temp\soft 1.14.exe
    "C:\Users\Admin\AppData\Local\Temp\soft 1.14.exe" /VERYSILENT
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2372
  - - C:\Users\Admin\AppData\Local\Temp\is-89H5L.tmp\soft 1.14.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-89H5L.tmp\soft 1.14.tmp" /SL5="$6014C,2280623,161792,C:\Users\Admin\AppData\Local\Temp\soft 1.14.exe" /VERYSILENT
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of FindShellTrayWindow
      Suspicious use of WriteProcessMemory
      PID:800
    - - C:\Windows\SysWOW64\regsvr32.exe
        
        "regsvr32.exe" /s /i:SYNC "C:\Users\Admin\AppData\Roaming\\1iphlpapi.drv"
        5⤵
        Loads dropped DLL
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:2984
      - C:\Windows\system32\regsvr32.exe
        
        /s /i:SYNC "C:\Users\Admin\AppData\Roaming\\1iphlpapi.drv"
        6⤵
        Loads dropped DLL
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:2704
        
        C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command "if (Get-ScheduledTask | Where-Object { $_.Actions.Execute -eq 'regsvr32' -and $_.Actions.Arguments -eq '/S /i:SYNC C:\Users\Admin\AppData\Roaming\1iphlpapi.drv' }) { exit 0 } else { exit 1 }"
        7⤵
        Command and Scripting Interpreter: PowerShell
        Drops file in System32 directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2348
        
        C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" "Register-ScheduledTask -Action (New-ScheduledTaskAction -Execute \"regsvr32\" -Argument \"/S /i:SYNC C:\Users\Admin\AppData\Roaming\1iphlpapi.drv\") -Trigger (New-ScheduledTaskTrigger -Once -At (Get-Date).AddMinutes(1) -RepetitionInterval (New-TimeSpan -Minutes 1)) -TaskName 'MicrosoftEdgeUpdateTaskMachineUA{2D9790CD-5FEC-4D77-EE4E-066AD1912C77}' -Description 'MicrosoftEdgeUpdateTaskMachineUA' -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries -ExecutionTimeLimit 0) -RunLevel Highest"
        7⤵
        Command and Scripting Interpreter: PowerShell
        Drops file in System32 directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2868

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\Desktop\StartRemove.mpeg3
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1796
- C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
  "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\Desktop\StartRemove.mpeg3"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2028

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:2164

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\1iphlpapi.drv

Filesize
4.2MB

MD5
0eb9dd8cd99ba5cda1580cedd1337c47

SHA1
47d50257261756ee304375fa84531cde9f1b2d80

SHA256
744ef584ca4ac58a3ee825f5ead1129753d6d44198b3b14a53e368b7d24e84ef

SHA512
2e7c3cc9cdbca9776b1e4ffa004a761d40629e4e5c5626df73367e1f41f7c560d3ae496a0ea211db497d7437855e9686205fb32220e23fab30f8b489d232e25a

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
7a1679efd8d0aee9877bf8b8d2d3746b

SHA1
75408780309cc6b1d136cf6db6e2766ae2f50d57

SHA256
6327fa82bf48984c4ad594f218d9e288618bd908f36d6342da032efd50963c3f

SHA512
d5d91efdfec15d134aa220db3c1288f0e05909ae95dcaded419f6c6880b997f1c9b337865c8f54fa4dd111558dbe682f1a4be623e9356bc7082a46125817aac4

Download Submit
\Users\Admin\AppData\Local\Temp\is-3MTH9.tmp\_isetup\_isdecmp.dll

Filesize
13KB

MD5
a813d18268affd4763dde940246dc7e5

SHA1
c7366e1fd925c17cc6068001bd38eaef5b42852f

SHA256
e19781aabe466dd8779cb9c8fa41bbb73375447066bb34e876cf388a6ed63c64

SHA512
b310ed4cd2e94381c00a6a370fcb7cc867ebe425d705b69caaaaffdafbab91f72d357966916053e72e68ecf712f2af7585500c58bb53ec3e1d539179fcb45fb4

Download Submit
\Users\Admin\AppData\Local\Temp\is-3MTH9.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-PDA8I.tmp\soft 1.14.tmp

Filesize
1.1MB

MD5
bcc236a3921e1388596a42b05686ff5e

SHA1
43bffbbac6a1bf5f1fa21e971e06e6f1d0af9263

SHA256
43a656bcd060e8a36502ca2deb878d56a99078f13d3e57dcd73a87128588c9e9

SHA512
e3baaf1a8f4eb0e1ab57a1fb35bc7ded476606b65fafb09835d34705d8c661819c3cfa0ecc43c5a0d0085fd570df581438de27944e054e12c09a6933bbf5ce04

Download Submit
memory/800-51-0x0000000000400000-0x000000000052D000-memory.dmp

Filesize
1.2MB

Download
memory/1256-10-0x0000000000400000-0x000000000052D000-memory.dmp

Filesize
1.2MB

Download
memory/1256-24-0x0000000000400000-0x000000000052D000-memory.dmp

Filesize
1.2MB

Download
memory/2348-62-0x0000000002290000-0x0000000002298000-memory.dmp

Filesize
32KB

Download
memory/2348-61-0x000000001B5A0000-0x000000001B882000-memory.dmp

Filesize
2.9MB

Download
memory/2372-53-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2372-22-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2372-25-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2396-27-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2396-2-0x0000000000401000-0x0000000000417000-memory.dmp

Filesize
88KB

Download
memory/2396-0-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2704-72-0x000000001B960000-0x000000001BC84000-memory.dmp

Filesize
3.1MB

Download
memory/2704-73-0x000007FEF6020000-0x000007FEF643C000-memory.dmp

Filesize
4.1MB

Download
memory/2868-69-0x000000001B6E0000-0x000000001B9C2000-memory.dmp

Filesize
2.9MB

Download
memory/2868-70-0x0000000001E70000-0x0000000001E78000-memory.dmp

Filesize
32KB

Download