quasar | 1ae218c37667a4a96d4ce7e19b19a5a56fa17b112f3bf6e94e78671ad6077168

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
29-06-2024 00:07

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General

Target

2024-06-28_95b71f1e434be97a39998f49d32da40b_icedid_poet-rat_quasar-rat_xrat.exe
Size

4.9MB
MD5

95b71f1e434be97a39998f49d32da40b
SHA1

ada21f3db506e3abb079b8cfb8c51a8924de2ed9
SHA256

1ae218c37667a4a96d4ce7e19b19a5a56fa17b112f3bf6e94e78671ad6077168
SHA512

c22511b254d29d22ea444cdf56ab9bb32a0e4d00c81b2d5e63a9394009ea7d4b747bc28a96cb845b62d998e91c3bcdf4f7e2dbaabc3f7dcdc92947b98c7e2559
SSDEEP

98304:2uhNyndYGvr22SsaNYfdPBldt6+dBcjHtKRJ6B6IbzZLRIbzZY:5cM7jGIRp+K

Score

10^/10

quasar office04 spyware trojan upx

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

mx5.deitie.asia:4495

Mutex

ebbf737a-dddd-43dd-9b0a-74831302455d

Attributes

encryption_key
F8516D89A1DFD78BD8FF575BBC3AE828B47FF0E1
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe	family_quasar
behavioral2/memory/4788-5-0x0000000000F40000-0x0000000001264000-memory.dmp	family_quasar

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

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/4788-5-0x0000000000F40000-0x0000000001264000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

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

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/4788-5-0x0000000000F40000-0x0000000001264000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects executables containing common artifacts observed in infostealers 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe	INDICATOR_SUSPICIOUS_GENInfoStealer
behavioral2/memory/4788-5-0x0000000000F40000-0x0000000001264000-memory.dmp	INDICATOR_SUSPICIOUS_GENInfoStealer

UPX dump on OEP (original entry point) 25 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2836-8-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-22-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-42-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-48-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-51-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-46-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-40-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-38-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-37-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-35-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-32-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-31-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-28-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-27-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-24-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-20-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-19-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-16-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-50-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-44-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-14-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-12-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-10-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-9-0x0000000010000000-0x000000001003E000-memory.dmp	UPX
behavioral2/memory/2836-59-0x0000000010000000-0x000000001003E000-memory.dmp	UPX

Drops startup file 1 IoCs

Processes:

2024-06-28_95b71f1e434be97a39998f49d32da40b_icedid_poet-rat_quasar-rat_xrat.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe 2024-06-28_95b71f1e434be97a39998f49d32da40b_icedid_poet-rat_quasar-rat_xrat.exe
Executes dropped EXE 2 IoCs

Processes:

sign.exeClient.exe

pid process

4788 sign.exe
2220 Client.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe	2024-06-28_95b71f1e434be97a39998f49d32da40b_icedid_poet-rat_quasar-rat_xrat.exe

pid	process
4788	sign.exe
2220	Client.exe

UPX packed file 25 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/2836-8-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-22-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-42-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-48-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-51-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-46-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-40-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-38-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-37-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-35-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-32-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-31-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-28-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-27-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-24-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-20-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-19-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-16-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-50-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-44-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-14-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-12-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-10-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-9-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/2836-59-0x0000000010000000-0x000000001003E000-memory.dmp	upx

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

Processes:

schtasks.exeschtasks.exe

pid process

2524 schtasks.exe
3668 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

2024-06-28_95b71f1e434be97a39998f49d32da40b_icedid_poet-rat_quasar-rat_xrat.exe

pid process

2836 2024-06-28_95b71f1e434be97a39998f49d32da40b_icedid_poet-rat_quasar-rat_xrat.exe
2836 2024-06-28_95b71f1e434be97a39998f49d32da40b_icedid_poet-rat_quasar-rat_xrat.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

sign.exeClient.exe

description pid process

Token: SeDebugPrivilege 4788 sign.exe
Token: SeDebugPrivilege 2220 Client.exe

pid	process
2524	schtasks.exe
3668	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	4788	sign.exe
Token: SeDebugPrivilege	2220	Client.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

2024-06-28_95b71f1e434be97a39998f49d32da40b_icedid_poet-rat_quasar-rat_xrat.exe

pid	process
2836	2024-06-28_95b71f1e434be97a39998f49d32da40b_icedid_poet-rat_quasar-rat_xrat.exe
2836	2024-06-28_95b71f1e434be97a39998f49d32da40b_icedid_poet-rat_quasar-rat_xrat.exe
2836	2024-06-28_95b71f1e434be97a39998f49d32da40b_icedid_poet-rat_quasar-rat_xrat.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

2024-06-28_95b71f1e434be97a39998f49d32da40b_icedid_poet-rat_quasar-rat_xrat.exesign.exeClient.exe

description	pid	process	target process
PID 2836 wrote to memory of 4788	2836	2024-06-28_95b71f1e434be97a39998f49d32da40b_icedid_poet-rat_quasar-rat_xrat.exe	sign.exe
PID 2836 wrote to memory of 4788	2836	2024-06-28_95b71f1e434be97a39998f49d32da40b_icedid_poet-rat_quasar-rat_xrat.exe	sign.exe
PID 4788 wrote to memory of 3668	4788	sign.exe	schtasks.exe
PID 4788 wrote to memory of 3668	4788	sign.exe	schtasks.exe
PID 4788 wrote to memory of 2220	4788	sign.exe	Client.exe
PID 4788 wrote to memory of 2220	4788	sign.exe	Client.exe
PID 2220 wrote to memory of 2524	2220	Client.exe	schtasks.exe
PID 2220 wrote to memory of 2524	2220	Client.exe	schtasks.exe

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\2024-06-28_95b71f1e434be97a39998f49d32da40b_icedid_poet-rat_quasar-rat_xrat.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-28_95b71f1e434be97a39998f49d32da40b_icedid_poet-rat_quasar-rat_xrat.exe"
1⤵
- Drops startup file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2836

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\\sign.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4788

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
3⤵
- Scheduled Task/Job: Scheduled Task
PID:3668

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2220

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
4⤵
- Scheduled Task/Job: Scheduled Task
PID:2524

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe
Filesize
3.1MB

MD5
7498d554976744dfbd271ba755c6c192

SHA1
ec733d01e776518e387d2f51d1a6559b81f03b1e

SHA256
44089202623b9671051aa5bba5e72f81f68ce818c3054dde57726aaa6dcb9ff7

SHA512
d4e987d0e6235001fac4ae3a634e8fe98c6830e26a6a6876fbc36262842688d3ec301cff75003d2af695cdfd357ac50919946695b7d5d3293ebcba97153e1030

Download Submit
memory/2220-62-0x00007FFEE9033000-0x00007FFEE9035000-memory.dmp

Filesize
8KB

Download
memory/2220-61-0x000000001D2D0000-0x000000001D382000-memory.dmp

Filesize
712KB

Download
memory/2220-60-0x000000001D1C0000-0x000000001D210000-memory.dmp

Filesize
320KB

Download
memory/2220-57-0x00007FFEE9033000-0x00007FFEE9035000-memory.dmp

Filesize
8KB

Download
memory/2836-28-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-8-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-48-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-51-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-46-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-40-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-38-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-37-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-35-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-32-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-31-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-22-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-27-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-24-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-59-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-42-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-20-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-19-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-16-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-50-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-44-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-14-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-12-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-10-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2836-9-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4788-58-0x00007FFEE9030000-0x00007FFEE9AF1000-memory.dmp

Filesize
10.8MB

Download
memory/4788-6-0x00007FFEE9030000-0x00007FFEE9AF1000-memory.dmp

Filesize
10.8MB

Download
memory/4788-5-0x0000000000F40000-0x0000000001264000-memory.dmp

Filesize
3.1MB

Download
memory/4788-4-0x00007FFEE9033000-0x00007FFEE9035000-memory.dmp

Filesize
8KB

Download