quasar | 8fc09b94cb97656101a274554d86c1f4f81a1a4e498b17396f7385e77750356c

General

Target
testy.exe
Size 348KB
Sample230304-v4nd8adh2x
SHA256 8fc09b94cb97656101a274554d86c1f4f81a1a4e498b17396f7385e77750356c
MD5 44c4500dfc0b17b9a836b2cf1161a8d2
SHA1 30d5a99be585a4383e49e4ac8efbe8e1554b782b
SHA512 28827472f20d37d3e611d65717901c756aaad012ab1b4b865051f14eabef7d95843363443ddffa612d1b87523b07aaaaf8ddc989416d7cee33c4b36eefe9b557
SSDEEP 6144:PU6bPXhLApfp2OuPUtSLN8A/dbRndMF5uRASspINPSy:smhApmPUtSiQ6F5oAS+wPSy
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

life-chase.at.ply.gg:24297

Mutex

QSR_MUTEX_n0f6at7YDD5llBKKrq

Attributes

encryption_key
GXr7FvcJDB19xszfi7lK
install_name
Protect.exe
log_directory
Logs
reconnect_delay
30
startup_key
MS Protect
subdirectory
SubDir

Signatures

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

Quasar payload 5 IoCs

resource	yara_rule
behavioral1/memory/1992-54-0x0000000000210000-0x000000000026E000-memory.dmp	family_quasar
behavioral1/files/0x000800000001423d-58.dat	family_quasar
behavioral1/files/0x000800000001423d-61.dat	family_quasar
behavioral1/files/0x000800000001423d-62.dat	family_quasar
behavioral1/memory/1744-63-0x0000000000020000-0x000000000007E000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1744	Protect.exe

Loads dropped DLL 1 IoCs

pid	Process
1992	testy.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.

flow	ioc
1	ip-api.com

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

pid	Process
2040	schtasks.exe
1292	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1992	testy.exe
Token: SeDebugPrivilege	1744	Protect.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1992 wrote to memory of 2040	1992	testy.exe	28
PID 1992 wrote to memory of 2040	1992	testy.exe	28
PID 1992 wrote to memory of 2040	1992	testy.exe	28
PID 1992 wrote to memory of 2040	1992	testy.exe	28
PID 1992 wrote to memory of 1744	1992	testy.exe	30
PID 1992 wrote to memory of 1744	1992	testy.exe	30
PID 1992 wrote to memory of 1744	1992	testy.exe	30
PID 1992 wrote to memory of 1744	1992	testy.exe	30
PID 1744 wrote to memory of 1292	1744	Protect.exe	31
PID 1744 wrote to memory of 1292	1744	Protect.exe	31
PID 1744 wrote to memory of 1292	1744	Protect.exe	31
PID 1744 wrote to memory of 1292	1744	Protect.exe	31

C:\Users\Admin\AppData\Local\Temp\testy.exe
"C:\Users\Admin\AppData\Local\Temp\testy.exe"
1⤵
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1992
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "MS Protect" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\testy.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:2040
- C:\Users\Admin\AppData\Roaming\SubDir\Protect.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Protect.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1744
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "MS Protect" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Protect.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:1292

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Protect.exe

Path C:\Users\Admin\AppData\Roaming\SubDir\Protect.exe
Size 348KB
SHA256 8fc09b94cb97656101a274554d86c1f4f81a1a4e498b17396f7385e77750356c
MD5 44c4500dfc0b17b9a836b2cf1161a8d2
SHA1 30d5a99be585a4383e49e4ac8efbe8e1554b782b
SHA512 28827472f20d37d3e611d65717901c756aaad012ab1b4b865051f14eabef7d95843363443ddffa612d1b87523b07aaaaf8ddc989416d7cee33c4b36eefe9b557
SSDEEP 6144:PU6bPXhLApfp2OuPUtSLN8A/dbRndMF5uRASspINPSy:smhApmPUtSiQ6F5oAS+wPSy
MD5 SHA1 SHA512 SSDEEP

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Protect.exe

Path C:\Users\Admin\AppData\Roaming\SubDir\Protect.exe
Size 348KB
SHA256 8fc09b94cb97656101a274554d86c1f4f81a1a4e498b17396f7385e77750356c
MD5 44c4500dfc0b17b9a836b2cf1161a8d2
SHA1 30d5a99be585a4383e49e4ac8efbe8e1554b782b
SHA512 28827472f20d37d3e611d65717901c756aaad012ab1b4b865051f14eabef7d95843363443ddffa612d1b87523b07aaaaf8ddc989416d7cee33c4b36eefe9b557
SSDEEP 6144:PU6bPXhLApfp2OuPUtSLN8A/dbRndMF5uRASspINPSy:smhApmPUtSiQ6F5oAS+wPSy
MD5 SHA1 SHA512 SSDEEP

Submit Download

Protect.exe

Path \Users\Admin\AppData\Roaming\SubDir\Protect.exe
Size 348KB
SHA256 8fc09b94cb97656101a274554d86c1f4f81a1a4e498b17396f7385e77750356c
MD5 44c4500dfc0b17b9a836b2cf1161a8d2
SHA1 30d5a99be585a4383e49e4ac8efbe8e1554b782b
SHA512 28827472f20d37d3e611d65717901c756aaad012ab1b4b865051f14eabef7d95843363443ddffa612d1b87523b07aaaaf8ddc989416d7cee33c4b36eefe9b557
SSDEEP 6144:PU6bPXhLApfp2OuPUtSLN8A/dbRndMF5uRASspINPSy:smhApmPUtSiQ6F5oAS+wPSy
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1744-63-0x0000000000020000-0x000000000007E000-memory.dmp

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memory/1744-64-0x00000000046E0000-0x0000000004720000-memory.dmp

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memory/1992-54-0x0000000000210000-0x000000000026E000-memory.dmp

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memory/1992-55-0x0000000004920000-0x0000000004960000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads