quasar | 164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f

Analysis

max time kernel
125s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
19-06-2024 01:07

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General

Target

164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe
Size

3.1MB
MD5

1b27e622f4edbbdd8fc93a0d1c129607
SHA1

3e7b42dd10c01f632f158cc96701f6ba49ebec48
SHA256

164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f
SHA512

bd6d609019f06649db920244a91ef5a2f105ea81055cdd53df72e737e1aae75b340060f45cb56383d201c154591a0a297fd69e1d09c5239b96ea5765a823ef5c
SSDEEP

49152:kvHI22SsaNYfdPBldt698dBcjHn30LdBhJo2d/UTHHB72eh2NT:kvo22SsaNYfdPBldt6+dBcjH30nv

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

94.228.166.40:4782

Mutex

172a89d7-b9b2-4d82-b5ed-6beb5326f544

Attributes

encryption_key
7970C2029EDBB83E6BD65073BE18684AC9FF3F48
install_name
KR6nDu9fLhop1bFe.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Defender.proces
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar payload 2 IoCs

Processes:

resource yara_rule

behavioral2/memory/4812-1-0x0000000000AF0000-0x0000000000E14000-memory.dmp family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe family_quasar

resource	yara_rule
behavioral2/memory/4812-1-0x0000000000AF0000-0x0000000000E14000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe	family_quasar

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

Processes:

resource	yara_rule
behavioral2/memory/4812-1-0x0000000000AF0000-0x0000000000E14000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

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

Processes:

resource	yara_rule
behavioral2/memory/4812-1-0x0000000000AF0000-0x0000000000E14000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects executables containing common artifacts observed in infostealers 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4812-1-0x0000000000AF0000-0x0000000000E14000-memory.dmp	INDICATOR_SUSPICIOUS_GENInfoStealer
C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe	INDICATOR_SUSPICIOUS_GENInfoStealer

Executes dropped EXE 1 IoCs

Processes:

KR6nDu9fLhop1bFe.exe

pid process

4856 KR6nDu9fLhop1bFe.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
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

4172 schtasks.exe
4484 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exeKR6nDu9fLhop1bFe.exe

description pid process

Token: SeDebugPrivilege 4812 164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe
Token: SeDebugPrivilege 4856 KR6nDu9fLhop1bFe.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

KR6nDu9fLhop1bFe.exe

pid process

4856 KR6nDu9fLhop1bFe.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

KR6nDu9fLhop1bFe.exe

pid process

4856 KR6nDu9fLhop1bFe.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

KR6nDu9fLhop1bFe.exe

pid process

4856 KR6nDu9fLhop1bFe.exe

pid	process
4856	KR6nDu9fLhop1bFe.exe

pid	process
4172	schtasks.exe
4484	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	4812	164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe
Token: SeDebugPrivilege	4856	KR6nDu9fLhop1bFe.exe

pid	process
4856	KR6nDu9fLhop1bFe.exe

pid	process
4856	KR6nDu9fLhop1bFe.exe

pid	process
4856	KR6nDu9fLhop1bFe.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exeKR6nDu9fLhop1bFe.exe

description	pid	process	target process
PID 4812 wrote to memory of 4172	4812	164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe	schtasks.exe
PID 4812 wrote to memory of 4172	4812	164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe	schtasks.exe
PID 4812 wrote to memory of 4856	4812	164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe	KR6nDu9fLhop1bFe.exe
PID 4812 wrote to memory of 4856	4812	164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe	KR6nDu9fLhop1bFe.exe
PID 4856 wrote to memory of 4484	4856	KR6nDu9fLhop1bFe.exe	schtasks.exe
PID 4856 wrote to memory of 4484	4856	KR6nDu9fLhop1bFe.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\164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe
"C:\Users\Admin\AppData\Local\Temp\164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4812

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Defender.proces" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe" /rl HIGHEST /f
2⤵
- Scheduled Task/Job: Scheduled Task
PID:4172

C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe
"C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4856

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Defender.proces" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe" /rl HIGHEST /f
3⤵
- Scheduled Task/Job: Scheduled Task
PID:4484

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe
Filesize
3.1MB

MD5
1b27e622f4edbbdd8fc93a0d1c129607

SHA1
3e7b42dd10c01f632f158cc96701f6ba49ebec48

SHA256
164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f

SHA512
bd6d609019f06649db920244a91ef5a2f105ea81055cdd53df72e737e1aae75b340060f45cb56383d201c154591a0a297fd69e1d09c5239b96ea5765a823ef5c

Download Submit
memory/4812-0-0x00007FF9F65B3000-0x00007FF9F65B5000-memory.dmp

Filesize
8KB

Download
memory/4812-1-0x0000000000AF0000-0x0000000000E14000-memory.dmp

Filesize
3.1MB

Download
memory/4812-2-0x00007FF9F65B0000-0x00007FF9F7071000-memory.dmp

Filesize
10.8MB

Download
memory/4812-9-0x00007FF9F65B0000-0x00007FF9F7071000-memory.dmp

Filesize
10.8MB

Download
memory/4856-10-0x00007FF9F65B0000-0x00007FF9F7071000-memory.dmp

Filesize
10.8MB

Download
memory/4856-11-0x00007FF9F65B0000-0x00007FF9F7071000-memory.dmp

Filesize
10.8MB

Download
memory/4856-12-0x000000001DD40000-0x000000001DD90000-memory.dmp

Filesize
320KB

Download
memory/4856-13-0x000000001DE50000-0x000000001DF02000-memory.dmp

Filesize
712KB

Download
memory/4856-14-0x00007FF9F65B0000-0x00007FF9F7071000-memory.dmp

Filesize
10.8MB

Download