quasar | 2af29a5f99c8ab0654dbece76b2e046f66703a4ae8b4ffa9b4071f9aa74523d7

Resubmissions

10-10-2024 02:19

241010-crx4sazhnm 10

Analysis

max time kernel
102s
max time network
138s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
10-10-2024 02:19

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Samples - 10-09-2024/4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe
Size

895KB
MD5

3a7af8198a80e2c90488ac8353a5cbd1
SHA1

a25c03255a2178a23dd99de6dc7adf07db1b609d
SHA256

4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd
SHA512

4bf648e551aa9576d959977d3d4c61ef4cabe96148943a9cc8948a9e4fbc8ed5f29ed2d491f19f6a92ad81d26fe993063c7662821d78f681635dc16339a533f4
SSDEEP

12288:sVTrUvSi+mnJCxAAyb8jL9BMBkP4ZVBIPZWM0O3qo/8X33IjWIWWFM:sVTrUvemJGyYjLWBIhWM0kqWwIWWFM

Score

10^/10

quasar office36 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office36

94.156.64.6:7283

Mutex

QSR_MUTEX_jvYKL1Jk1Q2NTx58gc

Attributes

encryption_key
LlEGluc1XmCcZfEs8y6n
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 3 IoCs

resource	yara_rule
behavioral18/memory/932-9-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral18/memory/932-11-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral18/memory/932-10-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1560	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.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.

flow	ioc
1	ip-api.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2904 set thread context of 932	2904	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	80
PID 1560 set thread context of 4720	1560	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	83

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2904	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe
2904	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2904	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe
Token: SeDebugPrivilege	932	RegSvcs.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2904 wrote to memory of 4892	2904	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	79
PID 2904 wrote to memory of 4892	2904	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	79
PID 2904 wrote to memory of 4892	2904	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	79
PID 2904 wrote to memory of 932	2904	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	80
PID 2904 wrote to memory of 932	2904	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	80
PID 2904 wrote to memory of 932	2904	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	80
PID 2904 wrote to memory of 932	2904	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	80
PID 2904 wrote to memory of 932	2904	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	80
PID 2904 wrote to memory of 932	2904	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	80
PID 2904 wrote to memory of 932	2904	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	80
PID 2904 wrote to memory of 932	2904	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	80
PID 1560 wrote to memory of 4720	1560	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	83
PID 1560 wrote to memory of 4720	1560	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	83
PID 1560 wrote to memory of 4720	1560	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	83
PID 1560 wrote to memory of 4720	1560	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	83
PID 1560 wrote to memory of 4720	1560	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	83
PID 1560 wrote to memory of 4720	1560	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	83
PID 1560 wrote to memory of 4720	1560	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	83
PID 1560 wrote to memory of 4720	1560	4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe	83

C:\Users\Admin\AppData\Local\Temp\Samples - 10-09-2024\4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe
"C:\Users\Admin\AppData\Local\Temp\Samples - 10-09-2024\4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2904
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  PID:4892
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:932

C:\Users\Admin\AppData\Roaming\Microsoft\4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe
C:\Users\Admin\AppData\Roaming\Microsoft\4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1560
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4720

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe.log

Filesize
517B

MD5
cc157ade855989e7d62a760cae2bc4c5

SHA1
6dcb7ff8e8c2e7f666454bc83efef551bd632b3a

SHA256
90072cd2f64043992fae9722af785a81110721f929a80a74fbb8818c36ebfcf8

SHA512
8eaf40c648b28752cb3a6bdc627f42ea5b2859c06ed0d19de31be9bcf31e223f49c5ec210eb702c8ea60216162d2f0f5f636103fbd5d97df9fcff16e7b28b0b7

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd.exe

Filesize
895KB

MD5
3a7af8198a80e2c90488ac8353a5cbd1

SHA1
a25c03255a2178a23dd99de6dc7adf07db1b609d

SHA256
4acf2f8eeb71da00b6b5356b63c472157b7e0936f1f7b8f5a06aa295482319fd

SHA512
4bf648e551aa9576d959977d3d4c61ef4cabe96148943a9cc8948a9e4fbc8ed5f29ed2d491f19f6a92ad81d26fe993063c7662821d78f681635dc16339a533f4

Download Submit
memory/932-21-0x0000000074B30000-0x00000000752E1000-memory.dmp

Filesize
7.7MB

Download
memory/932-10-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/932-19-0x0000000005BF0000-0x0000000005C02000-memory.dmp

Filesize
72KB

Download
memory/932-18-0x00000000057B0000-0x0000000005816000-memory.dmp

Filesize
408KB

Download
memory/932-22-0x0000000006BA0000-0x0000000006BAA000-memory.dmp

Filesize
40KB

Download
memory/932-9-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/932-11-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/932-17-0x0000000074B30000-0x00000000752E1000-memory.dmp

Filesize
7.7MB

Download
memory/932-8-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/932-15-0x0000000074B30000-0x00000000752E1000-memory.dmp

Filesize
7.7MB

Download
memory/932-20-0x0000000006A00000-0x0000000006A3C000-memory.dmp

Filesize
240KB

Download
memory/932-16-0x0000000005710000-0x00000000057A2000-memory.dmp

Filesize
584KB

Download
memory/1560-27-0x0000000074B30000-0x00000000752E1000-memory.dmp

Filesize
7.7MB

Download
memory/1560-33-0x0000000074B30000-0x00000000752E1000-memory.dmp

Filesize
7.7MB

Download
memory/1560-25-0x0000000074B30000-0x00000000752E1000-memory.dmp

Filesize
7.7MB

Download
memory/2904-7-0x00000000056A0000-0x00000000056A8000-memory.dmp

Filesize
32KB

Download
memory/2904-14-0x0000000074B30000-0x00000000752E1000-memory.dmp

Filesize
7.7MB

Download
memory/2904-0-0x0000000074B3E000-0x0000000074B3F000-memory.dmp

Filesize
4KB

Download
memory/2904-6-0x0000000005690000-0x000000000569C000-memory.dmp

Filesize
48KB

Download
memory/2904-4-0x00000000056C0000-0x0000000005C66000-memory.dmp

Filesize
5.6MB

Download
memory/2904-3-0x0000000005060000-0x00000000050FE000-memory.dmp

Filesize
632KB

Download
memory/2904-2-0x0000000074B30000-0x00000000752E1000-memory.dmp

Filesize
7.7MB

Download
memory/2904-1-0x00000000004D0000-0x00000000005B6000-memory.dmp

Filesize
920KB

Download