quasar | 0847a32772909b1685150473294dccd837d8ab3bf8d3a42fc75e8402c8fa9237

General

Target

0847a32772909b1685150473294dccd837d8ab3bf8d3a42fc75e8402c8fa9237.exe
Size

3.3MB
MD5

71de7ec63dbc36eac4435afcd17ee03d
SHA1

9c468f6dfae8fd63889e403a67aabc3257bd9e09
SHA256

0847a32772909b1685150473294dccd837d8ab3bf8d3a42fc75e8402c8fa9237
SHA512

5a7dccfe897b1940c9d2186bfc13508e4f8a55f15e6d8395f177f9e15ad97ad5c328d179a0d3113271e544d88e1bd74bb54d91bc3f8a8bcb6bd5b0ef142df8fd
SSDEEP

49152:LzbEXehF9XONWogPCy3RUn9NgLOb0THHB72eh2NTQAJ6:L8OLJVogPCy3an9OpAJ6

Score

10^/10

quasar service host: windows event log spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.3

Botnet

Service Host: Windows Event Log

C2

apple-coupled.gl.at.ply.gg:36473

147.185.221.18:36473

Mutex

44b6c65a-d844-4fa9-9d68-a7df5ab8b127

Attributes

encryption_key
8B7FB23965F229B24068B848FCD6536A6961D4FE
install_name
ServiceHostWindowsEventLog.exe
log_directory
runtime
reconnect_delay
5000
startup_key
Service Host
subdirectory
hdll

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/3880-0-0x0000000000690000-0x00000000009E4000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023150-6.dat	family_quasar

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

resource	yara_rule
behavioral2/memory/3880-0-0x0000000000690000-0x00000000009E4000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/files/0x000a000000023150-6.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

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

resource	yara_rule
behavioral2/memory/3880-0-0x0000000000690000-0x00000000009E4000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/files/0x000a000000023150-6.dat	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects executables containing common artifacts observed in infostealers 2 IoCs

resource	yara_rule
behavioral2/memory/3880-0-0x0000000000690000-0x00000000009E4000-memory.dmp	INDICATOR_SUSPICIOUS_GENInfoStealer
behavioral2/files/0x000a000000023150-6.dat	INDICATOR_SUSPICIOUS_GENInfoStealer

Executes dropped EXE 1 IoCs

pid	Process
2496	ServiceHostWindowsEventLog.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\hdll\ServiceHostWindowsEventLog.exe	ServiceHostWindowsEventLog.exe
File opened for modification	C:\Windows\system32\hdll	ServiceHostWindowsEventLog.exe
File created	C:\Windows\system32\hdll\ServiceHostWindowsEventLog.exe	0847a32772909b1685150473294dccd837d8ab3bf8d3a42fc75e8402c8fa9237.exe
File opened for modification	C:\Windows\system32\hdll\ServiceHostWindowsEventLog.exe	0847a32772909b1685150473294dccd837d8ab3bf8d3a42fc75e8402c8fa9237.exe
File opened for modification	C:\Windows\system32\hdll	0847a32772909b1685150473294dccd837d8ab3bf8d3a42fc75e8402c8fa9237.exe

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

pid	Process
3984	schtasks.exe
4104	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3880	0847a32772909b1685150473294dccd837d8ab3bf8d3a42fc75e8402c8fa9237.exe
Token: SeDebugPrivilege	2496	ServiceHostWindowsEventLog.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2496	ServiceHostWindowsEventLog.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3880 wrote to memory of 3984	3880	0847a32772909b1685150473294dccd837d8ab3bf8d3a42fc75e8402c8fa9237.exe	91
PID 3880 wrote to memory of 3984	3880	0847a32772909b1685150473294dccd837d8ab3bf8d3a42fc75e8402c8fa9237.exe	91
PID 3880 wrote to memory of 2496	3880	0847a32772909b1685150473294dccd837d8ab3bf8d3a42fc75e8402c8fa9237.exe	93
PID 3880 wrote to memory of 2496	3880	0847a32772909b1685150473294dccd837d8ab3bf8d3a42fc75e8402c8fa9237.exe	93
PID 2496 wrote to memory of 4104	2496	ServiceHostWindowsEventLog.exe	94
PID 2496 wrote to memory of 4104	2496	ServiceHostWindowsEventLog.exe	94

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\0847a32772909b1685150473294dccd837d8ab3bf8d3a42fc75e8402c8fa9237.exe
"C:\Users\Admin\AppData\Local\Temp\0847a32772909b1685150473294dccd837d8ab3bf8d3a42fc75e8402c8fa9237.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3880
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Service Host" /sc ONLOGON /tr "C:\Windows\system32\hdll\ServiceHostWindowsEventLog.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:3984
- C:\Windows\system32\hdll\ServiceHostWindowsEventLog.exe
  "C:\Windows\system32\hdll\ServiceHostWindowsEventLog.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2496
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Service Host" /sc ONLOGON /tr "C:\Windows\system32\hdll\ServiceHostWindowsEventLog.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:4104

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\hdll\ServiceHostWindowsEventLog.exe

Filesize
3.3MB

MD5
71de7ec63dbc36eac4435afcd17ee03d

SHA1
9c468f6dfae8fd63889e403a67aabc3257bd9e09

SHA256
0847a32772909b1685150473294dccd837d8ab3bf8d3a42fc75e8402c8fa9237

SHA512
5a7dccfe897b1940c9d2186bfc13508e4f8a55f15e6d8395f177f9e15ad97ad5c328d179a0d3113271e544d88e1bd74bb54d91bc3f8a8bcb6bd5b0ef142df8fd

Download Submit
memory/2496-9-0x00007FF969870000-0x00007FF96A331000-memory.dmp

Filesize
10.8MB

Download
memory/2496-11-0x0000000000EE0000-0x0000000000EF0000-memory.dmp

Filesize
64KB

Download
memory/2496-12-0x000000001BAC0000-0x000000001BB10000-memory.dmp

Filesize
320KB

Download
memory/2496-13-0x000000001BBD0000-0x000000001BC82000-memory.dmp

Filesize
712KB

Download
memory/2496-14-0x00007FF969870000-0x00007FF96A331000-memory.dmp

Filesize
10.8MB

Download
memory/2496-15-0x0000000000EE0000-0x0000000000EF0000-memory.dmp

Filesize
64KB

Download
memory/3880-0-0x0000000000690000-0x00000000009E4000-memory.dmp

Filesize
3.3MB

Download
memory/3880-2-0x00000000011A0000-0x00000000011B0000-memory.dmp

Filesize
64KB

Download
memory/3880-1-0x00007FF969870000-0x00007FF96A331000-memory.dmp

Filesize
10.8MB

Download
memory/3880-10-0x00007FF969870000-0x00007FF96A331000-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