quasar | c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047

Analysis

max time kernel
149s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
02/05/2024, 02:06

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe
Size

9.0MB
MD5

4921d7a6d49401873cff200a4f3d990d
SHA1

3d008d53e798505b858ff48574f3080210c56e27
SHA256

c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047
SHA512

9bc506b0615f3e7ba18ed70c92bef4dff257aad5437f17670ba88d8aec1ce20b0b46f8c194918e2c0fa0fa0397ec0ef2f954801da09fbf211c8597936fc097c4
SSDEEP

98304:F6D7RBxsErIVyJTk8LJ5i4J/OCV4HEZFrp:QRw08yJIC5uuT

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

93.123.85.108:4782

Mutex

e14b8f59-979b-4ebf-8602-dd3c4d6c301e

Attributes

encryption_key
534734397C0FA9A1D28F061AD75DF4100BFF5787
install_name
Msconfig.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

resource	yara_rule
behavioral2/memory/1396-16-0x0000000001420000-0x0000000001744000-memory.dmp	family_quasar

Detects Windows executables referencing non-Windows User-Agents 1 IoCs

resource	yara_rule
behavioral2/memory/1396-16-0x0000000001420000-0x0000000001744000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 1 IoCs

resource	yara_rule
behavioral2/memory/1396-16-0x0000000001420000-0x0000000001744000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects executables containing common artifacts observed in infostealers 1 IoCs

resource	yara_rule
behavioral2/memory/1396-16-0x0000000001420000-0x0000000001744000-memory.dmp	INDICATOR_SUSPICIOUS_GENInfoStealer

Detects executables packed with SmartAssembly 3 IoCs

resource	yara_rule
behavioral2/memory/4652-1-0x0000000000BF0000-0x00000000014FE000-memory.dmp	INDICATOR_EXE_Packed_SmartAssembly
behavioral2/memory/1444-6-0x0000000000E00000-0x000000000112A000-memory.dmp	INDICATOR_EXE_Packed_SmartAssembly
behavioral2/files/0x000a000000023b96-14.dat	INDICATOR_EXE_Packed_SmartAssembly

Executes dropped EXE 2 IoCs

pid	Process
1260	msconfig.exe
3796	msconfig.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 4652 set thread context of 1444	4652	c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe	100
PID 1444 set thread context of 1396	1444	csc.exe	109
PID 1260 set thread context of 1264	1260	msconfig.exe	121
PID 1264 set thread context of 2732	1264	csc.exe	137
PID 3796 set thread context of 5020	3796	msconfig.exe	147

Creates scheduled task(s) 1 TTPs 5 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2780	schtasks.exe
4368	schtasks.exe
1392	schtasks.exe
4552	schtasks.exe
4364	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1396	csc.exe
Token: SeDebugPrivilege	2732	csc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1396	csc.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 4652 wrote to memory of 1444	4652	c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe	100
PID 4652 wrote to memory of 1444	4652	c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe	100
PID 4652 wrote to memory of 1444	4652	c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe	100
PID 4652 wrote to memory of 1444	4652	c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe	100
PID 4652 wrote to memory of 1444	4652	c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe	100
PID 4652 wrote to memory of 1444	4652	c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe	100
PID 4652 wrote to memory of 1444	4652	c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe	100
PID 4652 wrote to memory of 1444	4652	c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe	100
PID 4652 wrote to memory of 4380	4652	c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe	101
PID 4652 wrote to memory of 4380	4652	c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe	101
PID 4652 wrote to memory of 4380	4652	c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe	101
PID 4652 wrote to memory of 1392	4652	c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe	103
PID 4652 wrote to memory of 1392	4652	c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe	103
PID 4652 wrote to memory of 1392	4652	c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe	103
PID 1392 wrote to memory of 2780	1392	cmd.exe	105
PID 1392 wrote to memory of 2780	1392	cmd.exe	105
PID 1392 wrote to memory of 2780	1392	cmd.exe	105
PID 4652 wrote to memory of 920	4652	c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe	106
PID 4652 wrote to memory of 920	4652	c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe	106
PID 4652 wrote to memory of 920	4652	c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe	106
PID 1444 wrote to memory of 1396	1444	csc.exe	109
PID 1444 wrote to memory of 1396	1444	csc.exe	109
PID 1444 wrote to memory of 1396	1444	csc.exe	109
PID 1444 wrote to memory of 1396	1444	csc.exe	109
PID 1444 wrote to memory of 1396	1444	csc.exe	109
PID 1444 wrote to memory of 1396	1444	csc.exe	109
PID 1444 wrote to memory of 1396	1444	csc.exe	109
PID 1444 wrote to memory of 1396	1444	csc.exe	109
PID 1444 wrote to memory of 4988	1444	csc.exe	110
PID 1444 wrote to memory of 4988	1444	csc.exe	110
PID 1444 wrote to memory of 4988	1444	csc.exe	110
PID 1444 wrote to memory of 4264	1444	csc.exe	112
PID 1444 wrote to memory of 4264	1444	csc.exe	112
PID 1444 wrote to memory of 4264	1444	csc.exe	112
PID 4264 wrote to memory of 4368	4264	cmd.exe	114
PID 4264 wrote to memory of 4368	4264	cmd.exe	114
PID 4264 wrote to memory of 4368	4264	cmd.exe	114
PID 1444 wrote to memory of 4704	1444	csc.exe	115
PID 1444 wrote to memory of 4704	1444	csc.exe	115
PID 1444 wrote to memory of 4704	1444	csc.exe	115
PID 1260 wrote to memory of 1264	1260	msconfig.exe	121
PID 1260 wrote to memory of 1264	1260	msconfig.exe	121
PID 1260 wrote to memory of 1264	1260	msconfig.exe	121
PID 1260 wrote to memory of 1264	1260	msconfig.exe	121
PID 1260 wrote to memory of 1264	1260	msconfig.exe	121
PID 1260 wrote to memory of 1264	1260	msconfig.exe	121
PID 1260 wrote to memory of 1264	1260	msconfig.exe	121
PID 1260 wrote to memory of 1264	1260	msconfig.exe	121
PID 1260 wrote to memory of 1344	1260	msconfig.exe	122
PID 1260 wrote to memory of 1344	1260	msconfig.exe	122
PID 1260 wrote to memory of 1344	1260	msconfig.exe	122
PID 1260 wrote to memory of 4324	1260	msconfig.exe	124
PID 1260 wrote to memory of 4324	1260	msconfig.exe	124
PID 1260 wrote to memory of 4324	1260	msconfig.exe	124
PID 4324 wrote to memory of 1392	4324	cmd.exe	126
PID 4324 wrote to memory of 1392	4324	cmd.exe	126
PID 4324 wrote to memory of 1392	4324	cmd.exe	126
PID 1260 wrote to memory of 3560	1260	msconfig.exe	127
PID 1260 wrote to memory of 3560	1260	msconfig.exe	127
PID 1260 wrote to memory of 3560	1260	msconfig.exe	127
PID 1264 wrote to memory of 2732	1264	csc.exe	137
PID 1264 wrote to memory of 2732	1264	csc.exe	137
PID 1264 wrote to memory of 2732	1264	csc.exe	137
PID 1264 wrote to memory of 2732	1264	csc.exe	137

C:\Users\Admin\AppData\Local\Temp\c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe
"C:\Users\Admin\AppData\Local\Temp\c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4652
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:1444
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:1396
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Roaming\msconfig"
    3⤵
    PID:4988
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe'" /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4264
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe'" /f
      4⤵
      Creates scheduled task(s)
      PID:4368
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /C copy "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe" "C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe"
    3⤵
    PID:4704
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Roaming\msconfig"
  2⤵
  PID:4380
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe'" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1392
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe'" /f
    3⤵
    - Creates scheduled task(s)
    PID:2780
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C copy "C:\Users\Admin\AppData\Local\Temp\c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047.exe" "C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe"
  2⤵
  PID:920

C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe
C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1260
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:1264
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2732
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Roaming\msconfig"
    3⤵
    PID:3892
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe'" /f
    3⤵
    PID:2428
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe'" /f
      4⤵
      Creates scheduled task(s)
      PID:4552
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /C copy "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe" "C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe"
    3⤵
    PID:2352
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Roaming\msconfig"
  2⤵
  PID:1344
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe'" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4324
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe'" /f
    3⤵
    - Creates scheduled task(s)
    PID:1392
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C copy "C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe" "C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe"
  2⤵
  PID:3560

C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe
C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
PID:3796
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
  2⤵
  PID:5020
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Roaming\msconfig"
  2⤵
  PID:4404
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe'" /f
  2⤵
  PID:4844
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe'" /f
    3⤵
    - Creates scheduled task(s)
    PID:4364
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C copy "C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe" "C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe"
  2⤵
  PID:3224

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

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\csc.exe.log

Filesize
520B

MD5
03febbff58da1d3318c31657d89c8542

SHA1
c9e017bd9d0a4fe533795b227c855935d86c2092

SHA256
5164770a37b199a79ccd23b399bb3309228973d9f74c589bc2623dc613b37ac4

SHA512
3750c372bbca1892e9c1b34681d592c693e725a8b149c3d6938079cd467628cec42c4293b0d886b57a786abf45f5e7229247b3445001774e3e793ff5a3accfa3

Download Submit
C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe

Filesize
9.0MB

MD5
4921d7a6d49401873cff200a4f3d990d

SHA1
3d008d53e798505b858ff48574f3080210c56e27

SHA256
c9d37a723484c763c7c25000eb11c7bb9cda571a8c2b7886f4610af6cd473047

SHA512
9bc506b0615f3e7ba18ed70c92bef4dff257aad5437f17670ba88d8aec1ce20b0b46f8c194918e2c0fa0fa0397ec0ef2f954801da09fbf211c8597936fc097c4

Download Submit
memory/1396-23-0x0000000006DD0000-0x0000000006E82000-memory.dmp

Filesize
712KB

Download
memory/1396-22-0x0000000006B60000-0x0000000006BB0000-memory.dmp

Filesize
320KB

Download
memory/1396-21-0x0000000007080000-0x0000000007698000-memory.dmp

Filesize
6.1MB

Download
memory/1396-20-0x0000000005E80000-0x0000000005E8A000-memory.dmp

Filesize
40KB

Download
memory/1396-17-0x0000000005F00000-0x0000000005F92000-memory.dmp

Filesize
584KB

Download
memory/1396-16-0x0000000001420000-0x0000000001744000-memory.dmp

Filesize
3.1MB

Download
memory/1444-19-0x0000000074670000-0x0000000074E20000-memory.dmp

Filesize
7.7MB

Download
memory/1444-13-0x0000000074670000-0x0000000074E20000-memory.dmp

Filesize
7.7MB

Download
memory/1444-8-0x0000000074670000-0x0000000074E20000-memory.dmp

Filesize
7.7MB

Download
memory/1444-7-0x0000000074670000-0x0000000074E20000-memory.dmp

Filesize
7.7MB

Download
memory/1444-6-0x0000000000E00000-0x000000000112A000-memory.dmp

Filesize
3.2MB

Download
memory/4652-12-0x0000000074670000-0x0000000074E20000-memory.dmp

Filesize
7.7MB

Download
memory/4652-5-0x0000000074670000-0x0000000074E20000-memory.dmp

Filesize
7.7MB

Download
memory/4652-0-0x000000007467E000-0x000000007467F000-memory.dmp

Filesize
4KB

Download
memory/4652-4-0x000000007467E000-0x000000007467F000-memory.dmp

Filesize
4KB

Download
memory/4652-3-0x0000000074670000-0x0000000074E20000-memory.dmp

Filesize
7.7MB

Download
memory/4652-2-0x0000000006560000-0x0000000006B04000-memory.dmp

Filesize
5.6MB

Download
memory/4652-1-0x0000000000BF0000-0x00000000014FE000-memory.dmp

Filesize
9.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads