quasar | 680caf0e30b204544971d053b635ed0e3f1dee3332d9eab8a08b3f04cd7ecd75

General

Target

Heart Sender V5.0.exe
Size

439KB
MD5

8f808bb54b422500304dfc68b87198fc
SHA1

24ebeb615f0bdcaa3980722100d6fc42111b62ec
SHA256

680caf0e30b204544971d053b635ed0e3f1dee3332d9eab8a08b3f04cd7ecd75
SHA512

46ce4cde81607819e360b0efc424c4b5602c7515661a88e6a0d66cd9e88dcc68219f0a85200e6c40cc34bcac0e5ab652e6db4b4b1c1b913ad351061dae880e99
SSDEEP

6144:vwLRSjIXAnZQel5w7T4P5Kq+SMv0VGb7bDcllbkuVB8:v/4AZrg7g9zVGkllbko

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Office04

C2

67.213.221.18:7812

Mutex

KFoYp486ql6lO6U0qI

Attributes

encryption_key
OtItMK9boIZNOQTejUzg
install_name
Windows Security.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Update
subdirectory
Windows Services

Signatures

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

Quasar payload 6 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Windows Security.exe	family_quasar
C:\Users\Admin\AppData\Roaming\Windows Security.exe	family_quasar
C:\Users\Admin\AppData\Roaming\Windows Security.exe	family_quasar
behavioral2/memory/3436-146-0x0000000000270000-0x00000000002BE000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\Windows Services\Windows Security.exe	family_quasar
C:\Users\Admin\AppData\Roaming\Windows Services\Windows Security.exe	family_quasar

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Heart Sender V5.0.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	Heart Sender V5.0.exe

Executes dropped EXE 2 IoCs

Processes:

Windows Security.exeWindows Security.exe

pid process

3436 Windows Security.exe
1060 Windows Security.exe
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

12 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

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
T1053

Processes:

schtasks.exeschtasks.exe

pid process

324 schtasks.exe
4988 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Windows Security.exeWindows Security.exe

description pid process

Token: SeDebugPrivilege 3436 Windows Security.exe
Token: SeDebugPrivilege 1060 Windows Security.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Windows Security.exe

pid process

1060 Windows Security.exe

pid	process
3436	Windows Security.exe
1060	Windows Security.exe

flow	ioc
12	ip-api.com

pid	process
324	schtasks.exe
4988	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	3436	Windows Security.exe
Token: SeDebugPrivilege	1060	Windows Security.exe

pid	process
1060	Windows Security.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

Heart Sender V5.0.exeWindows Security.exeWindows Security.exe

description	pid	process	target process
PID 1348 wrote to memory of 3436	1348	Heart Sender V5.0.exe	Windows Security.exe
PID 1348 wrote to memory of 3436	1348	Heart Sender V5.0.exe	Windows Security.exe
PID 1348 wrote to memory of 3436	1348	Heart Sender V5.0.exe	Windows Security.exe
PID 3436 wrote to memory of 324	3436	Windows Security.exe	schtasks.exe
PID 3436 wrote to memory of 324	3436	Windows Security.exe	schtasks.exe
PID 3436 wrote to memory of 324	3436	Windows Security.exe	schtasks.exe
PID 3436 wrote to memory of 1060	3436	Windows Security.exe	Windows Security.exe
PID 3436 wrote to memory of 1060	3436	Windows Security.exe	Windows Security.exe
PID 3436 wrote to memory of 1060	3436	Windows Security.exe	Windows Security.exe
PID 1060 wrote to memory of 4988	1060	Windows Security.exe	schtasks.exe
PID 1060 wrote to memory of 4988	1060	Windows Security.exe	schtasks.exe
PID 1060 wrote to memory of 4988	1060	Windows Security.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\Heart Sender V5.0.exe
"C:\Users\Admin\AppData\Local\Temp\Heart Sender V5.0.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1348

C:\Users\Admin\AppData\Roaming\Windows Security.exe
"C:\Users\Admin\AppData\Roaming\Windows Security.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3436

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Security.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:324

C:\Users\Admin\AppData\Roaming\Windows Services\Windows Security.exe
"C:\Users\Admin\AppData\Roaming\Windows Services\Windows Security.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1060

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Services\Windows Security.exe" /rl HIGHEST /f
4⤵
- Creates scheduled task(s)
PID:4988

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Windows Security.exe.log
Filesize
1KB

MD5
10eab9c2684febb5327b6976f2047587

SHA1
a12ed54146a7f5c4c580416aecb899549712449e

SHA256
f49dbd55029bfbc15134f7c6a4f967d6c39142c63f2e8f1f8c78fab108a2c928

SHA512
7e5fd90fffae723bd0c662a90e0730b507805f072771ee673d1d8c262dbf60c8a03ba5fe088f699a97c2e886380de158b2ccd59ee62e3d012dd6dd14ea9d0e50

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Security.exe
Filesize
289KB

MD5
9ed927a589ceb0eb1cd72036f72b65ac

SHA1
b48d9257d0c902736c897a4d0cdf430939ff47af

SHA256
ed1545bda10c94c007b0d75b7895d10548fa096ba1b984b519737dfc6f307f3a

SHA512
282871bd88691162e3aaa5f679049e991ecc3ea605fcb8a63eac284f93e2c499a7a36bae26f584675de5601fc72710eb464068f4d258bf7184cb1da2fe573675

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Security.exe
Filesize
289KB

MD5
9ed927a589ceb0eb1cd72036f72b65ac

SHA1
b48d9257d0c902736c897a4d0cdf430939ff47af

SHA256
ed1545bda10c94c007b0d75b7895d10548fa096ba1b984b519737dfc6f307f3a

SHA512
282871bd88691162e3aaa5f679049e991ecc3ea605fcb8a63eac284f93e2c499a7a36bae26f584675de5601fc72710eb464068f4d258bf7184cb1da2fe573675

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Security.exe
Filesize
289KB

MD5
9ed927a589ceb0eb1cd72036f72b65ac

SHA1
b48d9257d0c902736c897a4d0cdf430939ff47af

SHA256
ed1545bda10c94c007b0d75b7895d10548fa096ba1b984b519737dfc6f307f3a

SHA512
282871bd88691162e3aaa5f679049e991ecc3ea605fcb8a63eac284f93e2c499a7a36bae26f584675de5601fc72710eb464068f4d258bf7184cb1da2fe573675

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Services\Windows Security.exe
Filesize
289KB

MD5
9ed927a589ceb0eb1cd72036f72b65ac

SHA1
b48d9257d0c902736c897a4d0cdf430939ff47af

SHA256
ed1545bda10c94c007b0d75b7895d10548fa096ba1b984b519737dfc6f307f3a

SHA512
282871bd88691162e3aaa5f679049e991ecc3ea605fcb8a63eac284f93e2c499a7a36bae26f584675de5601fc72710eb464068f4d258bf7184cb1da2fe573675

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Services\Windows Security.exe
Filesize
289KB

MD5
9ed927a589ceb0eb1cd72036f72b65ac

SHA1
b48d9257d0c902736c897a4d0cdf430939ff47af

SHA256
ed1545bda10c94c007b0d75b7895d10548fa096ba1b984b519737dfc6f307f3a

SHA512
282871bd88691162e3aaa5f679049e991ecc3ea605fcb8a63eac284f93e2c499a7a36bae26f584675de5601fc72710eb464068f4d258bf7184cb1da2fe573675

Download Submit
memory/1060-163-0x0000000004C60000-0x0000000004C70000-memory.dmp

Filesize
64KB

Download
memory/1060-162-0x0000000006250000-0x000000000625A000-memory.dmp

Filesize
40KB

Download
memory/1060-160-0x0000000004C60000-0x0000000004C70000-memory.dmp

Filesize
64KB

Download
memory/1348-133-0x00000000010E0000-0x00000000010F0000-memory.dmp

Filesize
64KB

Download
memory/3436-146-0x0000000000270000-0x00000000002BE000-memory.dmp

Filesize
312KB

Download
memory/3436-152-0x00000000060B0000-0x00000000060EC000-memory.dmp

Filesize
240KB

Download
memory/3436-151-0x0000000005C90000-0x0000000005CA2000-memory.dmp

Filesize
72KB

Download
memory/3436-150-0x0000000005030000-0x0000000005096000-memory.dmp

Filesize
408KB

Download
memory/3436-149-0x0000000004C80000-0x0000000004C90000-memory.dmp

Filesize
64KB

Download
memory/3436-148-0x0000000004C90000-0x0000000004D22000-memory.dmp

Filesize
584KB

Download
memory/3436-147-0x0000000005180000-0x0000000005724000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads