quasar | d2ea05b0fa56e153cdbf014f6083cd6826bf52894ea38a664b1ed3669d6ec1d5

General

Target

305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe
Size

763KB
MD5

869037e716218fb7551d84b8ce7d0ae7
SHA1

12cb776519eeb2d5e6a7ab1ddce3a09f143d5f18
SHA256

305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6
SHA512

6840e10d1daeacd169dba4a0049bc3b9087726dd45551b9a9587d57ec45d926356ce1656a39fdf35c1acb4020c564ec1f6a910fd83cde99e3ff75195728c72d2
SSDEEP

12288:SAZdPU5ttcsREhy5IYU8OaNISOvsk0gnT467zpmw7OfimWm/YfdFxfJ:S2UVc+EhyuAOaNIBXnT46fpmiOfimWy4

Score

10^/10

quasar office04 persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Office04

C2

youhackernetpaingodxd.duckdns.org:5557

blablashitspreading.ddns.net:5557

Mutex

xEoEv3HHdyEIYwJRFM

Attributes

encryption_key
w3WfcmWh1iXT9cxeKFEX
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 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4724-147-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar

Downloads MZ/PE file

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exeUpdater-File.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	Updater-File.exe

Executes dropped EXE 1 IoCs

Processes:

Updater-File.exe

pid process

2204 Updater-File.exe

pid	process
2204	Updater-File.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Updater-File.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Driver = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Driver.exe\""	Updater-File.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.

Processes:

flow ioc

42 ip-api.com
Suspicious use of SetThreadContext 1 IoCs

Processes:

Updater-File.exe

description pid process target process

PID 2204 set thread context of 4724 2204 Updater-File.exe RegAsm.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3600 3040 WerFault.exe 305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exe

pid process

1764 powershell.exe
1764 powershell.exe

flow	ioc
42	ip-api.com

description	pid	process	target process
PID 2204 set thread context of 4724	2204	Updater-File.exe	RegAsm.exe

pid	pid_target	process	target process
3600	3040	WerFault.exe	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe

pid	process
1764	powershell.exe
1764	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exeUpdater-File.exepowershell.exeRegAsm.exe

description	pid	process
Token: SeDebugPrivilege	3040	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe
Token: SeDebugPrivilege	2204	Updater-File.exe
Token: SeDebugPrivilege	1764	powershell.exe
Token: SeDebugPrivilege	4724	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RegAsm.exe

pid process

4724 RegAsm.exe

pid	process
4724	RegAsm.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exeUpdater-File.exe

description	pid	process	target process
PID 3040 wrote to memory of 2204	3040	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	Updater-File.exe
PID 3040 wrote to memory of 2204	3040	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	Updater-File.exe
PID 3040 wrote to memory of 2204	3040	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	Updater-File.exe
PID 2204 wrote to memory of 1764	2204	Updater-File.exe	powershell.exe
PID 2204 wrote to memory of 1764	2204	Updater-File.exe	powershell.exe
PID 2204 wrote to memory of 1764	2204	Updater-File.exe	powershell.exe
PID 2204 wrote to memory of 4724	2204	Updater-File.exe	RegAsm.exe
PID 2204 wrote to memory of 4724	2204	Updater-File.exe	RegAsm.exe
PID 2204 wrote to memory of 4724	2204	Updater-File.exe	RegAsm.exe
PID 2204 wrote to memory of 4724	2204	Updater-File.exe	RegAsm.exe
PID 2204 wrote to memory of 4724	2204	Updater-File.exe	RegAsm.exe
PID 2204 wrote to memory of 4724	2204	Updater-File.exe	RegAsm.exe
PID 2204 wrote to memory of 4724	2204	Updater-File.exe	RegAsm.exe
PID 2204 wrote to memory of 4724	2204	Updater-File.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe
"C:\Users\Admin\AppData\Local\Temp\305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3040

C:\Users\Admin\AppData\Roaming\Updater-File.exe
"C:\Users\Admin\AppData\Roaming\Updater-File.exe"
2⤵
- Checks computer location settings
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2204

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1764

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
3⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4724

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3040 -s 2096
2⤵
- Program crash
PID:3600

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3040 -ip 3040
1⤵
PID:1332

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Updater-File.exe
Filesize
6KB

MD5
be2c9d9f3e9206eb7d809157ea37d0ea

SHA1
79fc984efb6d9e58c21f7c5dee8de2fc44710f62

SHA256
f07ca31e483745ac9fe74da53f939a797f3f8868717eb29f9f0d1286b89f6b79

SHA512
2510583a2690be0c48614fa21d24c2919d6c4f704d897ed4bb5a523d0bbc3616bd2aba7a6b22120068a24aa756a9b6f37feeb2b8eb461b86c2eacde935478d4b

Download Submit
C:\Users\Admin\AppData\Roaming\Updater-File.exe
Filesize
6KB

MD5
be2c9d9f3e9206eb7d809157ea37d0ea

SHA1
79fc984efb6d9e58c21f7c5dee8de2fc44710f62

SHA256
f07ca31e483745ac9fe74da53f939a797f3f8868717eb29f9f0d1286b89f6b79

SHA512
2510583a2690be0c48614fa21d24c2919d6c4f704d897ed4bb5a523d0bbc3616bd2aba7a6b22120068a24aa756a9b6f37feeb2b8eb461b86c2eacde935478d4b

Download Submit
memory/1764-142-0x0000000005A50000-0x0000000005AB6000-memory.dmp

Filesize
408KB

Download
memory/1764-145-0x00000000065B0000-0x00000000065CA000-memory.dmp

Filesize
104KB

Download
memory/1764-144-0x0000000007920000-0x0000000007F9A000-memory.dmp

Filesize
6.5MB

Download
memory/1764-143-0x00000000060B0000-0x00000000060CE000-memory.dmp

Filesize
120KB

Download
memory/1764-138-0x0000000000000000-mapping.dmp

Download
memory/1764-139-0x0000000004B10000-0x0000000004B46000-memory.dmp

Filesize
216KB

Download
memory/1764-140-0x00000000052C0000-0x00000000058E8000-memory.dmp

Filesize
6.2MB

Download
memory/1764-141-0x00000000058F0000-0x0000000005956000-memory.dmp

Filesize
408KB

Download
memory/2204-137-0x0000000006050000-0x0000000006072000-memory.dmp

Filesize
136KB

Download
memory/2204-136-0x0000000000470000-0x0000000000478000-memory.dmp

Filesize
32KB

Download
memory/2204-133-0x0000000000000000-mapping.dmp

Download
memory/3040-132-0x0000000000DE0000-0x0000000000EA4000-memory.dmp

Filesize
784KB

Download
memory/4724-146-0x0000000000000000-mapping.dmp

Download
memory/4724-147-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4724-148-0x0000000005920000-0x0000000005EC4000-memory.dmp

Filesize
5.6MB

Download
memory/4724-149-0x0000000005410000-0x00000000054A2000-memory.dmp

Filesize
584KB

Download
memory/4724-150-0x00000000058F0000-0x0000000005902000-memory.dmp

Filesize
72KB

Download
memory/4724-151-0x00000000067D0000-0x000000000680C000-memory.dmp

Filesize
240KB

Download
memory/4724-152-0x0000000006B30000-0x0000000006B3A000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads