quasar | 11c1119ca27a3d70ef72d69c3f1af1ae9540d4b5d2b48d9b3caa554ba6f54cd2

General

Target

11c1119ca27a3d70ef72d69c3f1af1ae9540d4b5d2b48d9b3caa554ba6f54cd2.exe
Size

4.6MB
MD5

3ed992586de3ed67aad864fe62734937
SHA1

bcf4c8a3cbc671ba7fc6ac38b1581806913883dd
SHA256

11c1119ca27a3d70ef72d69c3f1af1ae9540d4b5d2b48d9b3caa554ba6f54cd2
SHA512

42668112eacf827325c88af0c6ec59c16b918f6f9772ef84e15a5ad8f0b5b6dd9643fe6d2467216c1374725b9c6cb742017ec7cebb6fb2763189d1d697f6ac37
SSDEEP

98304:/gYSDiz3Clzp6QcwQhgBe8MFLgg5A4gmRGo1q0ZT:oHDcSNcwQhgBimwtH

Score

10^/10

quasar office05 defense_evasion discovery spyware themida trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office05

C2

192.168.0.101:2025

Mutex

3f648fc9-2a82-4ca1-8687-e39e14478579

Attributes

encryption_key
F3E6B52CEF8F81BA550B56134E7C52D02C97B9AA
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 2 IoCs

resource	yara_rule
behavioral2/memory/5288-5-0x0000000000400000-0x000000000103E000-memory.dmp	family_quasar
behavioral2/memory/5288-6-0x0000000000400000-0x000000000103E000-memory.dmp	family_quasar

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	11c1119ca27a3d70ef72d69c3f1af1ae9540d4b5d2b48d9b3caa554ba6f54cd2.exe

Checks BIOS information in registry 2 TTPs 2 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	11c1119ca27a3d70ef72d69c3f1af1ae9540d4b5d2b48d9b3caa554ba6f54cd2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	11c1119ca27a3d70ef72d69c3f1af1ae9540d4b5d2b48d9b3caa554ba6f54cd2.exe

Themida packer 2 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/5288-5-0x0000000000400000-0x000000000103E000-memory.dmp	themida
behavioral2/memory/5288-6-0x0000000000400000-0x000000000103E000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs

defense_evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	11c1119ca27a3d70ef72d69c3f1af1ae9540d4b5d2b48d9b3caa554ba6f54cd2.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
5288	11c1119ca27a3d70ef72d69c3f1af1ae9540d4b5d2b48d9b3caa554ba6f54cd2.exe

System Location Discovery: System Language Discovery 1 TTPs 1 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	11c1119ca27a3d70ef72d69c3f1af1ae9540d4b5d2b48d9b3caa554ba6f54cd2.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5288	11c1119ca27a3d70ef72d69c3f1af1ae9540d4b5d2b48d9b3caa554ba6f54cd2.exe
5288	11c1119ca27a3d70ef72d69c3f1af1ae9540d4b5d2b48d9b3caa554ba6f54cd2.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5288	11c1119ca27a3d70ef72d69c3f1af1ae9540d4b5d2b48d9b3caa554ba6f54cd2.exe

C:\Users\Admin\AppData\Local\Temp\11c1119ca27a3d70ef72d69c3f1af1ae9540d4b5d2b48d9b3caa554ba6f54cd2.exe
"C:\Users\Admin\AppData\Local\Temp\11c1119ca27a3d70ef72d69c3f1af1ae9540d4b5d2b48d9b3caa554ba6f54cd2.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:5288

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

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

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Downloads

memory/5288-0-0x0000000000400000-0x000000000103E000-memory.dmp

Filesize
12.2MB

Download
memory/5288-1-0x0000000076206000-0x0000000076207000-memory.dmp

Filesize
4KB

Download
memory/5288-2-0x00000000761F0000-0x00000000762E0000-memory.dmp

Filesize
960KB

Download
memory/5288-3-0x00000000761F0000-0x00000000762E0000-memory.dmp

Filesize
960KB

Download
memory/5288-5-0x0000000000400000-0x000000000103E000-memory.dmp

Filesize
12.2MB

Download
memory/5288-6-0x0000000000400000-0x000000000103E000-memory.dmp

Filesize
12.2MB

Download
memory/5288-8-0x00000000056F0000-0x0000000005782000-memory.dmp

Filesize
584KB

Download
memory/5288-7-0x00000000057E0000-0x0000000005D86000-memory.dmp

Filesize
5.6MB

Download
memory/5288-9-0x00000000056B0000-0x00000000056BA000-memory.dmp

Filesize
40KB

Download
memory/5288-10-0x0000000006610000-0x0000000006C28000-memory.dmp

Filesize
6.1MB

Download
memory/5288-11-0x0000000006160000-0x00000000061B0000-memory.dmp

Filesize
320KB

Download
memory/5288-12-0x0000000006360000-0x0000000006412000-memory.dmp

Filesize
712KB

Download
memory/5288-13-0x0000000000400000-0x000000000103E000-memory.dmp

Filesize
12.2MB

Download
memory/5288-14-0x0000000076206000-0x0000000076207000-memory.dmp

Filesize
4KB

Download
memory/5288-15-0x00000000761F0000-0x00000000762E0000-memory.dmp

Filesize
960KB

Download
memory/5288-17-0x00000000761F0000-0x00000000762E0000-memory.dmp

Filesize
960KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads