quasar | 67860b6c376983094f49a5a09dcaae107c693a2cdfbd203065ca2415a32f11cb

Analysis

max time kernel
141s
max time network
169s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
30/12/2023, 07:31

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General

Target
12332e311cefd7bc4b016ab51b885c7a.exe
Size 1.0MB
Sample231230-jch5msdfg6
SHA256 67860b6c376983094f49a5a09dcaae107c693a2cdfbd203065ca2415a32f11cb
MD5 12332e311cefd7bc4b016ab51b885c7a
SHA1 bc6e892c3c381b9155d9a6b28f31bfa1235c061d
SHA512 c75bd668bd4c842eef944d4e49c1675a6bbdb003b4cfb79832de4140f4c18c51d9b9b60db07262b96ceac140100724bf7f36ef1a1639afa8e1bd616cb2524ffe
SSDEEP 12288:kARNJ6j3LBFsSfNJwZH3Uw2oQb+9BXNwQlsljyFVRelCuXjV+apo+gO0aoUWqnDF:bLJ+FFsSFJg9LuuqnDonB1e
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

10.8.31.138:28394

Mutex

QSR_MUTEX_8o3qZGCFefA40MAkOh

Attributes

encryption_key
Gmm1w4utIxJXOFfCOJbk
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 payload 1 IoCs

resource	yara_rule
behavioral2/memory/1304-3-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4716 set thread context of 1304	4716	12332e311cefd7bc4b016ab51b885c7a.exe	90

Checks processor information in registry 2 TTPs 3 IoCs

Processor 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\CentralProcessor\0\ProcessorNameString	dw20.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	4716	12332e311cefd7bc4b016ab51b885c7a.exe
Token: SeRestorePrivilege	2764	dw20.exe
Token: SeBackupPrivilege	2764	dw20.exe
Token: SeBackupPrivilege	2764	dw20.exe
Token: SeBackupPrivilege	2764	dw20.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4716 wrote to memory of 1304	4716	12332e311cefd7bc4b016ab51b885c7a.exe	90
PID 4716 wrote to memory of 1304	4716	12332e311cefd7bc4b016ab51b885c7a.exe	90
PID 4716 wrote to memory of 1304	4716	12332e311cefd7bc4b016ab51b885c7a.exe	90
PID 4716 wrote to memory of 1304	4716	12332e311cefd7bc4b016ab51b885c7a.exe	90
PID 4716 wrote to memory of 1304	4716	12332e311cefd7bc4b016ab51b885c7a.exe	90
PID 4716 wrote to memory of 1304	4716	12332e311cefd7bc4b016ab51b885c7a.exe	90
PID 4716 wrote to memory of 1304	4716	12332e311cefd7bc4b016ab51b885c7a.exe	90
PID 4716 wrote to memory of 1304	4716	12332e311cefd7bc4b016ab51b885c7a.exe	90
PID 1304 wrote to memory of 2764	1304	12332e311cefd7bc4b016ab51b885c7a.exe	91
PID 1304 wrote to memory of 2764	1304	12332e311cefd7bc4b016ab51b885c7a.exe	91
PID 1304 wrote to memory of 2764	1304	12332e311cefd7bc4b016ab51b885c7a.exe	91

C:\Users\Admin\AppData\Local\Temp\12332e311cefd7bc4b016ab51b885c7a.exe
"C:\Users\Admin\AppData\Local\Temp\12332e311cefd7bc4b016ab51b885c7a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4716
- C:\Users\Admin\AppData\Local\Temp\12332e311cefd7bc4b016ab51b885c7a.exe
  C:\Users\Admin\AppData\Local\Temp\12332e311cefd7bc4b016ab51b885c7a.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1304
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
    dw20.exe -x -s 776
    3⤵
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    PID:2764

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

12332e311cefd7bc4b016ab51b885c7a.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\12332e311cefd7bc4b016ab51b885c7a.exe.log
Size 224B
SHA256 677e9e30350df17e2bc20fa9f7d730e9f7cc6e870d6520a345f5f7dc5b31f58a
MD5 c19eb8c8e7a40e6b987f9d2ee952996e
SHA1 6fc3049855bc9100643e162511673c6df0f28bfb
SHA512 860713b4a787c2189ed12a47d4b68b60ac00c7a253cae52dd4eb9276dacafeae3a81906b6d0742c8ecfdfaa255777c445beb7c2a532f3c677a9903237ac97596
MD5 SHA1 SHA512

Submit Download

memory/1304-3-0x0000000000400000-0x000000000045E000-memory.dmp

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memory/1304-6-0x0000000074EE0000-0x0000000075491000-memory.dmp

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memory/1304-8-0x00000000011E0000-0x00000000011F0000-memory.dmp

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memory/1304-9-0x0000000074EE0000-0x0000000075491000-memory.dmp

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memory/1304-16-0x0000000074EE0000-0x0000000075491000-memory.dmp

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memory/4716-0-0x0000000074EE0000-0x0000000075491000-memory.dmp

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memory/4716-2-0x0000000001480000-0x0000000001490000-memory.dmp

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memory/4716-1-0x0000000074EE0000-0x0000000075491000-memory.dmp

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memory/4716-7-0x0000000074EE0000-0x0000000075491000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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