quasar | 8904d96a473dd52cd5255e046d47148eb27cc778395fff4f220bbb9509f643d8

Analysis

max time kernel
597s
max time network
599s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 00:05

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General

Target

IDTOIPBYR_0.exe
Size

38KB
MD5

b653b660e1aca5529c24b1ee268b2829
SHA1

a05cbb401ab1648e1078f1a27286c5f7155d357f
SHA256

c924d7502dcf3af74739270218066f0431678e122fa35aefefdacc1edd2b1b0c
SHA512

9cee437b7524deabc31d9a219e77ef72cbc342563e6c34a0f2aa568b8b35a91cfe81c91fcd6ba085238664f374d200d6017e3e6fd8c5e0d0f751b802fc043e2f
SSDEEP

384:nLRF4OFc5Kjagmz2OpZkWX+lnjofGZTW65TRE0iA97aa9yN+JWhDCEjUoe0BFqCd:nLRFDTXOGZv5O0iW2awrUoDBFq3D0

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

3.1.5

Botnet

Office04

147.185.221.19:33587

Mutex

$Sxr-lG7PreqFKmNhJc0CKS

Attributes

encryption_key
11fnZjAdVB1EIQVhl7wn
install_name
DLLrunhost.exe
log_directory
UpdLogs
reconnect_delay
3000
startup_key
WindowsAudioHelper
subdirectory
Windows

Signatures

Quasar RAT 3 IoCs
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Processes:

schtasks.exe

pid process

4992 schtasks.exe
11 ip-api.com
21 ip-api.com

pid	process
4992	schtasks.exe
11	ip-api.com
21	ip-api.com

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral8/memory/2084-0-0x00000000003A0000-0x000000000040E000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\Windows\DLLrunhost.exe	family_quasar

Drops file in Drivers directory 1 IoCs

Processes:

IDTOIPBYR_0.exe

description ioc process

File opened for modification C:\Windows\system32\drivers\etc\hosts IDTOIPBYR_0.exe

description	ioc	process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	IDTOIPBYR_0.exe

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:

IDTOIPBYR_0.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	IDTOIPBYR_0.exe

Executes dropped EXE 1 IoCs

Processes:

DLLrunhost.exe

pid process

2000 DLLrunhost.exe
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

11 ip-api.com
21 ip-api.com
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 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exeSCHTASKS.exeschtasks.exe

pid process

4992 schtasks.exe
3364 SCHTASKS.exe
3472 schtasks.exe
Gathers network information 2 TTPs 1 IoCs
Uses commandline utility to view network configuration.

System Information Discovery
T1082

Command and Scripting Interpreter
T1059

Processes:

ipconfig.exe

pid process

980 ipconfig.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exe

pid process

520 powershell.exe
520 powershell.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

IDTOIPBYR_0.exepowershell.exeDLLrunhost.exe

description pid process

Token: SeDebugPrivilege 2084 IDTOIPBYR_0.exe
Token: SeDebugPrivilege 520 powershell.exe
Token: SeDebugPrivilege 2000 DLLrunhost.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

DLLrunhost.exe

pid process

2000 DLLrunhost.exe

pid	process
2000	DLLrunhost.exe

flow	ioc
11	ip-api.com
21	ip-api.com

pid	process
4992	schtasks.exe
3364	SCHTASKS.exe
3472	schtasks.exe

pid	process
980	ipconfig.exe

pid	process
520	powershell.exe
520	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2084	IDTOIPBYR_0.exe
Token: SeDebugPrivilege	520	powershell.exe
Token: SeDebugPrivilege	2000	DLLrunhost.exe

pid	process
2000	DLLrunhost.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

IDTOIPBYR_0.exeDLLrunhost.exe

description	pid	process	target process
PID 2084 wrote to memory of 4992	2084	IDTOIPBYR_0.exe	schtasks.exe
PID 2084 wrote to memory of 4992	2084	IDTOIPBYR_0.exe	schtasks.exe
PID 2084 wrote to memory of 4992	2084	IDTOIPBYR_0.exe	schtasks.exe
PID 2084 wrote to memory of 2000	2084	IDTOIPBYR_0.exe	DLLrunhost.exe
PID 2084 wrote to memory of 2000	2084	IDTOIPBYR_0.exe	DLLrunhost.exe
PID 2084 wrote to memory of 2000	2084	IDTOIPBYR_0.exe	DLLrunhost.exe
PID 2084 wrote to memory of 520	2084	IDTOIPBYR_0.exe	powershell.exe
PID 2084 wrote to memory of 520	2084	IDTOIPBYR_0.exe	powershell.exe
PID 2084 wrote to memory of 520	2084	IDTOIPBYR_0.exe	powershell.exe
PID 2084 wrote to memory of 980	2084	IDTOIPBYR_0.exe	ipconfig.exe
PID 2084 wrote to memory of 980	2084	IDTOIPBYR_0.exe	ipconfig.exe
PID 2084 wrote to memory of 980	2084	IDTOIPBYR_0.exe	ipconfig.exe
PID 2084 wrote to memory of 3364	2084	IDTOIPBYR_0.exe	SCHTASKS.exe
PID 2084 wrote to memory of 3364	2084	IDTOIPBYR_0.exe	SCHTASKS.exe
PID 2084 wrote to memory of 3364	2084	IDTOIPBYR_0.exe	SCHTASKS.exe
PID 2000 wrote to memory of 3472	2000	DLLrunhost.exe	schtasks.exe
PID 2000 wrote to memory of 3472	2000	DLLrunhost.exe	schtasks.exe
PID 2000 wrote to memory of 3472	2000	DLLrunhost.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\IDTOIPBYR_0.exe
"C:\Users\Admin\AppData\Local\Temp\IDTOIPBYR_0.exe"
1⤵
- Drops file in Drivers directory
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2084

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "WindowsAudioHelper" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\IDTOIPBYR_0.exe" /rl HIGHEST /f
2⤵
- Quasar RAT
- Creates scheduled task(s)
PID:4992

C:\Users\Admin\AppData\Roaming\Windows\DLLrunhost.exe
"C:\Users\Admin\AppData\Roaming\Windows\DLLrunhost.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2000

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "WindowsAudioHelper" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\DLLrunhost.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:3472

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" -WindowStyle Hidden -Command "Add-MpPreference -ExclusionPath (Get-Item -LiteralPath $env:SystemRoot).Root"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:520

C:\Windows\SysWOW64\ipconfig.exe
"C:\Windows\System32\ipconfig.exe" /flushdns
2⤵
- Gathers network information
PID:980

C:\Windows\SysWOW64\SCHTASKS.exe
"SCHTASKS.exe" /create /tn "$77IDTOIPBYR_0.exe" /tr "'C:\Users\Admin\AppData\Local\Temp\IDTOIPBYR_0.exe'" /sc onlogon /rl HIGHEST
2⤵
- Creates scheduled task(s)
PID:3364

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

T1053

Command and Scripting Interpreter

T1059

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2ufkrpbp.wn5.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\Windows\DLLrunhost.exe
Filesize
413KB

MD5
aabcedbac7ad8b10993f6de878be1ba4

SHA1
be8ea58edc1e83ebf33fe0e87a29916e9c554426

SHA256
4466cd4392c0fa3c49979664630db1b607e129c858fd44507cf5fc6b5b9dd3ba

SHA512
5a2bb094997699335a149ca353dc5e98e66482aa9dadc52502068337760bbd65bd648b3935777f4424e9811705657bcd2eb38254d731d892256d578c1f1eaf66

Download Submit
memory/520-56-0x00000000070E0000-0x00000000070F1000-memory.dmp

Filesize
68KB

Download
memory/520-41-0x0000000006EC0000-0x0000000006EF2000-memory.dmp

Filesize
200KB

Download
memory/520-18-0x0000000002760000-0x0000000002770000-memory.dmp

Filesize
64KB

Download
memory/520-57-0x0000000007120000-0x000000000712E000-memory.dmp

Filesize
56KB

Download
memory/520-19-0x0000000004E00000-0x0000000005428000-memory.dmp

Filesize
6.2MB

Download
memory/520-55-0x00000000070B0000-0x00000000070BA000-memory.dmp

Filesize
40KB

Download
memory/520-60-0x0000000007160000-0x0000000007168000-memory.dmp

Filesize
32KB

Download
memory/520-21-0x0000000004D50000-0x0000000004DB6000-memory.dmp

Filesize
408KB

Download
memory/520-53-0x0000000006F10000-0x0000000006FB3000-memory.dmp

Filesize
652KB

Download
memory/520-16-0x0000000002760000-0x0000000002770000-memory.dmp

Filesize
64KB

Download
memory/520-15-0x0000000074760000-0x0000000074F10000-memory.dmp

Filesize
7.7MB

Download
memory/520-17-0x00000000025A0000-0x00000000025D6000-memory.dmp

Filesize
216KB

Download
memory/520-58-0x0000000007130000-0x0000000007144000-memory.dmp

Filesize
80KB

Download
memory/520-59-0x0000000007170000-0x000000000718A000-memory.dmp

Filesize
104KB

Download
memory/520-54-0x0000000007E10000-0x000000000848A000-memory.dmp

Filesize
6.5MB

Download
memory/520-20-0x0000000004CB0000-0x0000000004CD2000-memory.dmp

Filesize
136KB

Download
memory/520-63-0x0000000074760000-0x0000000074F10000-memory.dmp

Filesize
7.7MB

Download
memory/520-28-0x0000000005530000-0x0000000005884000-memory.dmp

Filesize
3.3MB

Download
memory/520-52-0x0000000006EA0000-0x0000000006EBE000-memory.dmp

Filesize
120KB

Download
memory/520-34-0x0000000005B90000-0x0000000005BAE000-memory.dmp

Filesize
120KB

Download
memory/520-35-0x0000000005C20000-0x0000000005C6C000-memory.dmp

Filesize
304KB

Download
memory/520-42-0x0000000071260000-0x00000000712AC000-memory.dmp

Filesize
304KB

Download
memory/520-38-0x0000000006B90000-0x0000000006C26000-memory.dmp

Filesize
600KB

Download
memory/520-40-0x0000000006110000-0x0000000006132000-memory.dmp

Filesize
136KB

Download
memory/520-39-0x0000000006060000-0x000000000607A000-memory.dmp

Filesize
104KB

Download
memory/2000-14-0x00000000051D0000-0x00000000051E0000-memory.dmp

Filesize
64KB

Download
memory/2000-37-0x0000000006620000-0x000000000662A000-memory.dmp

Filesize
40KB

Download
memory/2000-65-0x00000000051D0000-0x00000000051E0000-memory.dmp

Filesize
64KB

Download
memory/2000-64-0x0000000074760000-0x0000000074F10000-memory.dmp

Filesize
7.7MB

Download
memory/2000-13-0x0000000074760000-0x0000000074F10000-memory.dmp

Filesize
7.7MB

Download
memory/2084-5-0x0000000004EC0000-0x0000000004F26000-memory.dmp

Filesize
408KB

Download
memory/2084-6-0x0000000005270000-0x0000000005282000-memory.dmp

Filesize
72KB

Download
memory/2084-7-0x0000000006060000-0x000000000609C000-memory.dmp

Filesize
240KB

Download
memory/2084-4-0x0000000004F40000-0x0000000004F50000-memory.dmp

Filesize
64KB

Download
memory/2084-3-0x0000000004E20000-0x0000000004EB2000-memory.dmp

Filesize
584KB

Download
memory/2084-2-0x00000000052B0000-0x0000000005854000-memory.dmp

Filesize
5.6MB

Download
memory/2084-1-0x0000000074760000-0x0000000074F10000-memory.dmp

Filesize
7.7MB

Download
memory/2084-0-0x00000000003A0000-0x000000000040E000-memory.dmp

Filesize
440KB

Download
memory/2084-29-0x0000000074760000-0x0000000074F10000-memory.dmp

Filesize
7.7MB

Download