quasar | 0d83301aae4af98108f42ccbc7d9b4e3abcd65c91162fc0bfa8d4e3c86733560

General

Target

SecuriteInfo.com.Trojan.SuspectCRC.22361.24708.exe
Size

5.1MB
MD5

792356f7c40d44cb6b1b377a7b02a008
SHA1

5ef9b84d198977bca60da829601efc9a638686c9
SHA256

0d83301aae4af98108f42ccbc7d9b4e3abcd65c91162fc0bfa8d4e3c86733560
SHA512

f6f9d4c389bf1f91ad471085ef6ee90f989bfe0376d3591d0f4440ceb67c26a89f66865f6fa3fd05fbc4cf860fb7a98397242552374367e34ee9b87164f8970b
SSDEEP

98304:FZKWn+ek5LTdM/9sIVbjATvMJDOf7EoAaQs2oY8SurJeM2zBrZiN:FZKW4lM/SIVeMJFWQsq8Rtelk

Score

10^/10

quasar defense_evasion discovery execution spyware themida trojan

Malware Config

Extracted

Family

quasar

C2

�lN�=�R�qv�M(�WYbkVL+��C��%�#��1�qE��P��

Attributes

encryption_key
77B2BF56CB0DCA65A36017F742415FDAE927B839
reconnect_delay
3000

Signatures

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

Quasar payload 5 IoCs

resource	yara_rule
behavioral1/memory/5368-38-0x0000000000400000-0x0000000000F10000-memory.dmp	family_quasar
behavioral1/memory/5368-39-0x0000000000400000-0x0000000000F10000-memory.dmp	family_quasar
behavioral1/memory/5368-51-0x0000000000400000-0x0000000000F10000-memory.dmp	family_quasar
behavioral1/memory/1832-54-0x0000000000400000-0x0000000000F10000-memory.dmp	family_quasar
behavioral1/memory/1832-55-0x0000000000400000-0x0000000000F10000-memory.dmp	family_quasar

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	TMP00005699876341.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	wintds.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
1972	powershell.exe
4664	powershell.exe
1972	powershell.exe

Checks BIOS information in registry 2 TTPs 4 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	TMP00005699876341.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	TMP00005699876341.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	wintds.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	wintds.exe

Executes dropped EXE 2 IoCs

pid	Process
5368	TMP00005699876341.exe
1832	wintds.exe

Themida packer 6 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/files/0x00080000000242c9-33.dat	themida
behavioral1/memory/5368-38-0x0000000000400000-0x0000000000F10000-memory.dmp	themida
behavioral1/memory/5368-39-0x0000000000400000-0x0000000000F10000-memory.dmp	themida
behavioral1/memory/5368-51-0x0000000000400000-0x0000000000F10000-memory.dmp	themida
behavioral1/memory/1832-54-0x0000000000400000-0x0000000000F10000-memory.dmp	themida
behavioral1/memory/1832-55-0x0000000000400000-0x0000000000F10000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 2 IoCs

defense_evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	TMP00005699876341.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	wintds.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
5368	TMP00005699876341.exe
1832	wintds.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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	TMP00005699876341.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wintds.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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
4576	schtasks.exe
4284	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1832	wintds.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1972	powershell.exe
1972	powershell.exe
4664	powershell.exe
4664	powershell.exe
5368	TMP00005699876341.exe
5368	TMP00005699876341.exe
1832	wintds.exe
1832	wintds.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2784	SecuriteInfo.com.Trojan.SuspectCRC.22361.24708.exe
Token: SeDebugPrivilege	1972	powershell.exe
Token: SeDebugPrivilege	4664	powershell.exe
Token: SeDebugPrivilege	5368	TMP00005699876341.exe
Token: SeDebugPrivilege	1832	wintds.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1832	wintds.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2784 wrote to memory of 1972	2784	SecuriteInfo.com.Trojan.SuspectCRC.22361.24708.exe	89
PID 2784 wrote to memory of 1972	2784	SecuriteInfo.com.Trojan.SuspectCRC.22361.24708.exe	89
PID 2784 wrote to memory of 4664	2784	SecuriteInfo.com.Trojan.SuspectCRC.22361.24708.exe	97
PID 2784 wrote to memory of 4664	2784	SecuriteInfo.com.Trojan.SuspectCRC.22361.24708.exe	97
PID 4664 wrote to memory of 5368	4664	powershell.exe	99
PID 4664 wrote to memory of 5368	4664	powershell.exe	99
PID 4664 wrote to memory of 5368	4664	powershell.exe	99
PID 5368 wrote to memory of 4576	5368	TMP00005699876341.exe	101
PID 5368 wrote to memory of 4576	5368	TMP00005699876341.exe	101
PID 5368 wrote to memory of 4576	5368	TMP00005699876341.exe	101
PID 5368 wrote to memory of 1832	5368	TMP00005699876341.exe	103
PID 5368 wrote to memory of 1832	5368	TMP00005699876341.exe	103
PID 5368 wrote to memory of 1832	5368	TMP00005699876341.exe	103
PID 1832 wrote to memory of 4284	1832	wintds.exe	104
PID 1832 wrote to memory of 4284	1832	wintds.exe	104
PID 1832 wrote to memory of 4284	1832	wintds.exe	104

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.SuspectCRC.22361.24708.exe
"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.SuspectCRC.22361.24708.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2784
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -WindowStyle Hidden Add-MpPreference -ExclusionProcess 'C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.SuspectCRC.22361.24708.exe'; Add-MpPreference -ExclusionProcess 'TMP00005699876341.exe'; Add-MpPreference -ExclusionProcess 'wintds.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1972
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -WindowStyle Hidden Start-Process 'C:\Users\Admin\AppData\Local\Temp\\TMP00005699876341.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4664
- - C:\Users\Admin\AppData\Local\Temp\TMP00005699876341.exe
    "C:\Users\Admin\AppData\Local\Temp\TMP00005699876341.exe"
    3⤵
    - Identifies VirtualBox via ACPI registry values (likely anti-VM)
    - Checks BIOS information in registry
    - Executes dropped EXE
    - Checks whether UAC is enabled
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:5368
  - - C:\Windows\SysWOW64\schtasks.exe
      "schtasks" /create /tn "WinTds Optimizer" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WinTds\wintds.exe" /rl HIGHEST /f
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:4576
  - - C:\Users\Admin\AppData\Roaming\WinTds\wintds.exe
      "C:\Users\Admin\AppData\Roaming\WinTds\wintds.exe"
      4⤵
      Identifies VirtualBox via ACPI registry values (likely anti-VM)
      Checks BIOS information in registry
      Executes dropped EXE
      Checks whether UAC is enabled
      Suspicious use of NtSetInformationThreadHideFromDebugger
      System Location Discovery: System Language Discovery
      Suspicious behavior: AddClipboardFormatListener
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:1832
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "WinTds Optimizer" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WinTds\wintds.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:4284

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Virtualization/Sandbox Evasion

1

T1497

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
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
d230e2e97704f9cc74439c51f1687c77

SHA1
900f3725386290db32227d09958968fcacce740a

SHA256
1294dc2197cdf3429384ef75726994b66d267ce2be233fca14ec9a18ff045d76

SHA512
d6dcaafe9b15e9566fcdf5561a9286a9164c453c05e81f5de30577f8541bf0c86318d7f5014d18ec0953c8eadf336db257d012a42e63d8e2c7e91c4ab3caeb81

Download Submit
C:\Users\Admin\AppData\Local\Temp\TMP00005699876341.exe

Filesize
5.0MB

MD5
a75bfbe152f51f8f02666e6f4e41a168

SHA1
99c85678f6849d0aadd9e044e2a44d7369562aa6

SHA256
26540e0dffce71aec5e0db25e929917055fced4e3e3f49fe944d2a40a5af05a9

SHA512
cd4d684a8ee18b2676b1f2ff0e897c385fc8247d14e9768f354d96a6f3ea5a6269d01052f8aeaada0cb0b1017c286263942414655487df77d9e3ac7ce0450653

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_nrmlilgy.vsf.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1832-59-0x00000000065B0000-0x0000000006662000-memory.dmp

Filesize
712KB

Download
memory/1832-70-0x0000000000400000-0x0000000000F10000-memory.dmp

Filesize
11.1MB

Download
memory/1832-52-0x0000000000400000-0x0000000000F10000-memory.dmp

Filesize
11.1MB

Download
memory/1832-55-0x0000000000400000-0x0000000000F10000-memory.dmp

Filesize
11.1MB

Download
memory/1832-56-0x0000000006230000-0x0000000006242000-memory.dmp

Filesize
72KB

Download
memory/1832-67-0x0000000007670000-0x00000000076AC000-memory.dmp

Filesize
240KB

Download
memory/1832-66-0x0000000007650000-0x0000000007662000-memory.dmp

Filesize
72KB

Download
memory/1832-57-0x0000000006250000-0x000000000628A000-memory.dmp

Filesize
232KB

Download
memory/1832-68-0x00000000076B0000-0x0000000007716000-memory.dmp

Filesize
408KB

Download
memory/1832-58-0x00000000063B0000-0x0000000006400000-memory.dmp

Filesize
320KB

Download
memory/1832-62-0x0000000006780000-0x00000000067CA000-memory.dmp

Filesize
296KB

Download
memory/1832-63-0x00000000067E0000-0x000000000680A000-memory.dmp

Filesize
168KB

Download
memory/1832-61-0x0000000006730000-0x000000000677C000-memory.dmp

Filesize
304KB

Download
memory/1832-60-0x0000000006690000-0x00000000066DE000-memory.dmp

Filesize
312KB

Download
memory/1832-54-0x0000000000400000-0x0000000000F10000-memory.dmp

Filesize
11.1MB

Download
memory/1972-13-0x000001C7EBC20000-0x000001C7EBC42000-memory.dmp

Filesize
136KB

Download
memory/1972-3-0x00007FFB4BFC0000-0x00007FFB4CA81000-memory.dmp

Filesize
10.8MB

Download
memory/1972-18-0x00007FFB4BFC0000-0x00007FFB4CA81000-memory.dmp

Filesize
10.8MB

Download
memory/1972-15-0x00007FFB4BFC0000-0x00007FFB4CA81000-memory.dmp

Filesize
10.8MB

Download
memory/1972-14-0x00007FFB4BFC0000-0x00007FFB4CA81000-memory.dmp

Filesize
10.8MB

Download
memory/2784-19-0x0000022E54760000-0x0000022E54C6C000-memory.dmp

Filesize
5.0MB

Download
memory/2784-21-0x00007FFB4BFC0000-0x00007FFB4CA81000-memory.dmp

Filesize
10.8MB

Download
memory/2784-1-0x0000022E37BF0000-0x0000022E3810A000-memory.dmp

Filesize
5.1MB

Download
memory/2784-44-0x00007FFB4BFC0000-0x00007FFB4CA81000-memory.dmp

Filesize
10.8MB

Download
memory/2784-2-0x00007FFB4BFC0000-0x00007FFB4CA81000-memory.dmp

Filesize
10.8MB

Download
memory/2784-0-0x00007FFB4BFC3000-0x00007FFB4BFC5000-memory.dmp

Filesize
8KB

Download
memory/5368-43-0x0000000005C40000-0x0000000005C5A000-memory.dmp

Filesize
104KB

Download
memory/5368-39-0x0000000000400000-0x0000000000F10000-memory.dmp

Filesize
11.1MB

Download
memory/5368-38-0x0000000000400000-0x0000000000F10000-memory.dmp

Filesize
11.1MB

Download
memory/5368-36-0x0000000000400000-0x0000000000F10000-memory.dmp

Filesize
11.1MB

Download
memory/5368-40-0x0000000005690000-0x0000000005C34000-memory.dmp

Filesize
5.6MB

Download
memory/5368-41-0x0000000005550000-0x00000000055E2000-memory.dmp

Filesize
584KB

Download
memory/5368-51-0x0000000000400000-0x0000000000F10000-memory.dmp

Filesize
11.1MB

Download
memory/5368-45-0x0000000005CA0000-0x0000000005CAA000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads