quasar | 4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a

General

Target

4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe
Size

3.1MB
MD5

b05ef4b68b309f9aefa705d3c0ab50e1
SHA1

ffbf50f019be8426868b616960713fa4f596905c
SHA256

4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a
SHA512

e77b2fd9d92fd286cedd1f7a70767968a9048b02206493b43aaac11b73a29fbc8819a28f2fb7b765c87cfbf734fad0fda40483bb495a2f177833c31a5ce9294b
SSDEEP

49152:2vPI22SsaNYfdPBldt698dBcjHKyRJ68bR3LoGdJJTHHB72eh2NT:2vA22SsaNYfdPBldt6+dBcjHKyRJ6GZ

Score

10^/10

quasar 1st spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

1st

C2

94.156.8.44:4787

94.156.8.44:6606

Mutex

8c89b218-c255-48cb-be3d-4ac14fe780fa

Attributes

encryption_key
4785083178D87EB2AD342D8849D0672AE29F1744
install_name
softgui.exe
log_directory
Logs
reconnect_delay
3000
startup_key
softgui.svc
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2260-0-0x0000000000110000-0x0000000000434000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe	family_quasar

Detects Windows executables referencing non-Windows User-Agents 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2260-0-0x0000000000110000-0x0000000000434000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2260-0-0x0000000000110000-0x0000000000434000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects executables containing common artifacts observed in infostealers 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2260-0-0x0000000000110000-0x0000000000434000-memory.dmp	INDICATOR_SUSPICIOUS_GENInfoStealer
C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe	INDICATOR_SUSPICIOUS_GENInfoStealer

Executes dropped EXE 1 IoCs

Processes:

softgui.exe

pid process

4112 softgui.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exeschtasks.exe

pid process

4100 schtasks.exe
4248 schtasks.exe

pid	process
4112	softgui.exe

pid	process
4100	schtasks.exe
4248	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exesoftgui.exe

description	pid	process
Token: SeDebugPrivilege	2260	4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe
Token: SeDebugPrivilege	4112	softgui.exe

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

softgui.exe

pid process

4112 softgui.exe
4112 softgui.exe
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

softgui.exe

pid process

4112 softgui.exe
4112 softgui.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

softgui.exe

pid process

4112 softgui.exe

pid	process
4112	softgui.exe
4112	softgui.exe

pid	process
4112	softgui.exe
4112	softgui.exe

pid	process
4112	softgui.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exesoftgui.exe

description	pid	process	target process
PID 2260 wrote to memory of 4100	2260	4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe	schtasks.exe
PID 2260 wrote to memory of 4100	2260	4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe	schtasks.exe
PID 2260 wrote to memory of 4112	2260	4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe	softgui.exe
PID 2260 wrote to memory of 4112	2260	4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe	softgui.exe
PID 4112 wrote to memory of 4248	4112	softgui.exe	schtasks.exe
PID 4112 wrote to memory of 4248	4112	softgui.exe	schtasks.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe
"C:\Users\Admin\AppData\Local\Temp\4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2260

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "softgui.svc" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:4100

C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe
"C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4112

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "softgui.svc" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:4248

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe
Filesize
3.1MB

MD5
b05ef4b68b309f9aefa705d3c0ab50e1

SHA1
ffbf50f019be8426868b616960713fa4f596905c

SHA256
4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a

SHA512
e77b2fd9d92fd286cedd1f7a70767968a9048b02206493b43aaac11b73a29fbc8819a28f2fb7b765c87cfbf734fad0fda40483bb495a2f177833c31a5ce9294b

Download Submit
memory/2260-0-0x0000000000110000-0x0000000000434000-memory.dmp

Filesize
3.1MB

Download
memory/2260-1-0x00007FFAC7BF0000-0x00007FFAC86B1000-memory.dmp

Filesize
10.8MB

Download
memory/2260-2-0x0000000000D00000-0x0000000000D10000-memory.dmp

Filesize
64KB

Download
memory/2260-10-0x00007FFAC7BF0000-0x00007FFAC86B1000-memory.dmp

Filesize
10.8MB

Download
memory/4112-9-0x00007FFAC7BF0000-0x00007FFAC86B1000-memory.dmp

Filesize
10.8MB

Download
memory/4112-11-0x000000001BEE0000-0x000000001BF30000-memory.dmp

Filesize
320KB

Download
memory/4112-12-0x000000001BFF0000-0x000000001C0A2000-memory.dmp

Filesize
712KB

Download
memory/4112-15-0x000000001BF70000-0x000000001BF82000-memory.dmp

Filesize
72KB

Download
memory/4112-16-0x000000001CAF0000-0x000000001CB2C000-memory.dmp

Filesize
240KB

Download
memory/4112-17-0x00007FFAC7BF0000-0x00007FFAC86B1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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