quasar | a323a9891c15a533b2356c710a9610dcd764931b2122404d1278952d6a2611e1

Analysis

max time kernel
146s
max time network
155s
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, 05:13

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General

Target

0fb77a7f91ccadcee16b1f264b0a53df.exe
Size

1.0MB
MD5

0fb77a7f91ccadcee16b1f264b0a53df
SHA1

efadf32a52f1b6bfde9ab82bd4ac5cd1598d8a8f
SHA256

a323a9891c15a533b2356c710a9610dcd764931b2122404d1278952d6a2611e1
SHA512

e6a30817ab7031b0d2170d28d61c721d8d609e65485054e8e706740582454bf0cb54a2029781628d8a994165674d4652e2592cf9c4db4b78434de1d235be8373
SSDEEP

12288:kARNJ6j3LBFsSfNJwZH3Uw2oQb+9BXNwQlsljyFVRelCuXjV+apo+gO0aoUWqnDi:bLJ+FFsSFJg9LuuqnDonB1

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/1648-3-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3960 set thread context of 1648	3960	0fb77a7f91ccadcee16b1f264b0a53df.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\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

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

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3960	0fb77a7f91ccadcee16b1f264b0a53df.exe
Token: SeRestorePrivilege	3888	dw20.exe
Token: SeBackupPrivilege	3888	dw20.exe
Token: SeBackupPrivilege	3888	dw20.exe
Token: SeBackupPrivilege	3888	dw20.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3960 wrote to memory of 1648	3960	0fb77a7f91ccadcee16b1f264b0a53df.exe	90
PID 3960 wrote to memory of 1648	3960	0fb77a7f91ccadcee16b1f264b0a53df.exe	90
PID 3960 wrote to memory of 1648	3960	0fb77a7f91ccadcee16b1f264b0a53df.exe	90
PID 3960 wrote to memory of 1648	3960	0fb77a7f91ccadcee16b1f264b0a53df.exe	90
PID 3960 wrote to memory of 1648	3960	0fb77a7f91ccadcee16b1f264b0a53df.exe	90
PID 3960 wrote to memory of 1648	3960	0fb77a7f91ccadcee16b1f264b0a53df.exe	90
PID 3960 wrote to memory of 1648	3960	0fb77a7f91ccadcee16b1f264b0a53df.exe	90
PID 3960 wrote to memory of 1648	3960	0fb77a7f91ccadcee16b1f264b0a53df.exe	90
PID 1648 wrote to memory of 3888	1648	0fb77a7f91ccadcee16b1f264b0a53df.exe	92
PID 1648 wrote to memory of 3888	1648	0fb77a7f91ccadcee16b1f264b0a53df.exe	92
PID 1648 wrote to memory of 3888	1648	0fb77a7f91ccadcee16b1f264b0a53df.exe	92

C:\Users\Admin\AppData\Local\Temp\0fb77a7f91ccadcee16b1f264b0a53df.exe
"C:\Users\Admin\AppData\Local\Temp\0fb77a7f91ccadcee16b1f264b0a53df.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3960
- C:\Users\Admin\AppData\Local\Temp\0fb77a7f91ccadcee16b1f264b0a53df.exe
  C:\Users\Admin\AppData\Local\Temp\0fb77a7f91ccadcee16b1f264b0a53df.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1648
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
    dw20.exe -x -s 784
    3⤵
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    PID:3888

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

C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\0fb77a7f91ccadcee16b1f264b0a53df.exe.log

Filesize
224B

MD5
687357bfbb063545265a73281a2bc5ba

SHA1
ee498b21b89f9f47abd477ff19120f3b9cf43c69

SHA256
23988e78ff35f3785d21d4d7e35336c4b9fea2b550a6252b9e19a460e8963a90

SHA512
49b803bcbe231263eb5c5c188f69180ff56c520bb3021102dbdf731400c16ed3df70b3d3d2832919536c55bddd3a49cdfa26a565d264fe2b8e70d69d8d26a4a5

Download Submit
memory/1648-3-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1648-6-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/1648-8-0x00000000014D0000-0x00000000014E0000-memory.dmp

Filesize
64KB

Download
memory/1648-9-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/1648-16-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/3960-0-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/3960-1-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/3960-2-0x0000000001A20000-0x0000000001A30000-memory.dmp

Filesize
64KB

Download
memory/3960-7-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads