quasar | d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a

General

Target

d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe
Size

3.1MB
MD5

1eaac929bfec99fbb06cf9871c9093ba
SHA1

d9b10f8785e173e2f210a36dc10db3367a076338
SHA256

d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a
SHA512

776168a0584fdf426c3e26289bcf8f918c63da20b04013b7fc0c920da2620c3e08b1857c13fadf7dc61109d2afc964f6493b2b74e815109238941246db4d0752
SSDEEP

49152:yv9t62XlaSFNWPjljiFa2RoUYIoPeEErHXk/uVMoGd6+THHB72eh2NTX:yv/62XlaSFNWPjljiFXRoUYIoPePyK

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

45.95.214.119:1604

Mutex

f9f58545-e044-4981-817b-950eaa1429c9

Attributes

encryption_key
B45F6102F44CEBC69B790BA64CFCD6C9F8E03CE3
install_name
sys.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Skype
subdirectory
sys64

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/1028-1-0x0000000000650000-0x0000000000974000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023cb4-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
5068	sys.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\ sys64\sys.exe	sys.exe
File opened for modification	C:\Windows\system32\ sys64	sys.exe
File created	C:\Windows\system32\ sys64\sys.exe	d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe
File opened for modification	C:\Windows\system32\ sys64\sys.exe	d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe
File opened for modification	C:\Windows\system32\ sys64	d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
5072	schtasks.exe
3492	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1028	d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe
Token: SeDebugPrivilege	5068	sys.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1028 wrote to memory of 3492	1028	d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe	86
PID 1028 wrote to memory of 3492	1028	d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe	86
PID 1028 wrote to memory of 5068	1028	d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe	88
PID 1028 wrote to memory of 5068	1028	d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe	88
PID 5068 wrote to memory of 5072	5068	sys.exe	90
PID 5068 wrote to memory of 5072	5068	sys.exe	90

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\d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe
"C:\Users\Admin\AppData\Local\Temp\d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1028
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Skype" /sc ONLOGON /tr "C:\Windows\system32\ sys64\sys.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3492
- C:\Windows\system32\ sys64\sys.exe
  "C:\Windows\system32\ sys64\sys.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5068
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Skype" /sc ONLOGON /tr "C:\Windows\system32\ sys64\sys.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:5072

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\ sys64\sys.exe

Filesize
3.1MB

MD5
1eaac929bfec99fbb06cf9871c9093ba

SHA1
d9b10f8785e173e2f210a36dc10db3367a076338

SHA256
d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a

SHA512
776168a0584fdf426c3e26289bcf8f918c63da20b04013b7fc0c920da2620c3e08b1857c13fadf7dc61109d2afc964f6493b2b74e815109238941246db4d0752

Download Submit
memory/1028-0-0x00007FF814CB3000-0x00007FF814CB5000-memory.dmp

Filesize
8KB

Download
memory/1028-1-0x0000000000650000-0x0000000000974000-memory.dmp

Filesize
3.1MB

Download
memory/1028-2-0x00007FF814CB0000-0x00007FF815771000-memory.dmp

Filesize
10.8MB

Download
memory/1028-9-0x00007FF814CB0000-0x00007FF815771000-memory.dmp

Filesize
10.8MB

Download
memory/5068-10-0x00007FF814CB0000-0x00007FF815771000-memory.dmp

Filesize
10.8MB

Download
memory/5068-11-0x00007FF814CB0000-0x00007FF815771000-memory.dmp

Filesize
10.8MB

Download
memory/5068-12-0x000000001BE10000-0x000000001BE60000-memory.dmp

Filesize
320KB

Download
memory/5068-13-0x000000001BF20000-0x000000001BFD2000-memory.dmp

Filesize
712KB

Download
memory/5068-16-0x000000001BEA0000-0x000000001BEB2000-memory.dmp

Filesize
72KB

Download
memory/5068-17-0x000000001C620000-0x000000001C65C000-memory.dmp

Filesize
240KB

Download
memory/5068-18-0x00007FF814CB0000-0x00007FF815771000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads