quasar | bbea0c056d01b506a9a6d37b6aca9147466e65a962f4b140887334e6f4a23b6c

Analysis

max time kernel
137s
max time network
147s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
07/11/2024, 08:02

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General

Target

Auftragsbestätigung 20241107_pdf.com.exe
Size

3.7MB
MD5

5d350ff6f79df58f29f77fc7b74d892e
SHA1

4cdb861ef0884b613071d7351b3564402722811f
SHA256

bbea0c056d01b506a9a6d37b6aca9147466e65a962f4b140887334e6f4a23b6c
SHA512

758ff980aaf24e66cc45d410c967d3f37aad9a46db9d79b815f222fd8999786637a5df7d7cb74f194b79a0216b35a3a77e8c2c2c8443194b27eef132b07664ff
SSDEEP

98304:YfpDVLWR3t89g0luja0VOsfBR42dNVePoEJimT7fci+DMQzlxkPYm:qpDVaRiabbPBJdDePoEQmPfciIMF

Score

10^/10

quasar dave discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

DAVE

hoffmann3.ydns.eu:5829

bich23.ydns.eu:5829

Mutex

309db0e8-63c5-4e08-a2f3-92745d11177da5

Attributes

encryption_key
C5B555A83D127A9553D4FB1FCECB35CE8E91A447
install_name
outlook.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Outlook
subdirectory
WindowsUpdate

Signatures

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

Quasar payload 5 IoCs

resource	yara_rule
behavioral1/memory/1520-12-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/1520-20-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/1520-17-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/1520-15-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/1520-9-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
2776	outlook.exe
2652	outlook.exe

Loads dropped DLL 2 IoCs

pid	Process
1520	Auftragsbestätigung 20241107_pdf.com.exe
2776	outlook.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 328 set thread context of 1520	328	Auftragsbestätigung 20241107_pdf.com.exe	32
PID 2776 set thread context of 2652	2776	outlook.exe	36

System Location Discovery: System Language Discovery 1 TTPs 6 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	outlook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	outlook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Auftragsbestätigung 20241107_pdf.com.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Auftragsbestätigung 20241107_pdf.com.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

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

pid	Process
2864	schtasks.exe
1620	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
328	Auftragsbestätigung 20241107_pdf.com.exe
328	Auftragsbestätigung 20241107_pdf.com.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	328	Auftragsbestätigung 20241107_pdf.com.exe
Token: SeDebugPrivilege	1520	Auftragsbestätigung 20241107_pdf.com.exe
Token: SeDebugPrivilege	2652	outlook.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2652	outlook.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 328 wrote to memory of 2880	328	Auftragsbestätigung 20241107_pdf.com.exe	31
PID 328 wrote to memory of 2880	328	Auftragsbestätigung 20241107_pdf.com.exe	31
PID 328 wrote to memory of 2880	328	Auftragsbestätigung 20241107_pdf.com.exe	31
PID 328 wrote to memory of 2880	328	Auftragsbestätigung 20241107_pdf.com.exe	31
PID 328 wrote to memory of 1520	328	Auftragsbestätigung 20241107_pdf.com.exe	32
PID 328 wrote to memory of 1520	328	Auftragsbestätigung 20241107_pdf.com.exe	32
PID 328 wrote to memory of 1520	328	Auftragsbestätigung 20241107_pdf.com.exe	32
PID 328 wrote to memory of 1520	328	Auftragsbestätigung 20241107_pdf.com.exe	32
PID 328 wrote to memory of 1520	328	Auftragsbestätigung 20241107_pdf.com.exe	32
PID 328 wrote to memory of 1520	328	Auftragsbestätigung 20241107_pdf.com.exe	32
PID 328 wrote to memory of 1520	328	Auftragsbestätigung 20241107_pdf.com.exe	32
PID 328 wrote to memory of 1520	328	Auftragsbestätigung 20241107_pdf.com.exe	32
PID 328 wrote to memory of 1520	328	Auftragsbestätigung 20241107_pdf.com.exe	32
PID 1520 wrote to memory of 2864	1520	Auftragsbestätigung 20241107_pdf.com.exe	33
PID 1520 wrote to memory of 2864	1520	Auftragsbestätigung 20241107_pdf.com.exe	33
PID 1520 wrote to memory of 2864	1520	Auftragsbestätigung 20241107_pdf.com.exe	33
PID 1520 wrote to memory of 2864	1520	Auftragsbestätigung 20241107_pdf.com.exe	33
PID 1520 wrote to memory of 2776	1520	Auftragsbestätigung 20241107_pdf.com.exe	35
PID 1520 wrote to memory of 2776	1520	Auftragsbestätigung 20241107_pdf.com.exe	35
PID 1520 wrote to memory of 2776	1520	Auftragsbestätigung 20241107_pdf.com.exe	35
PID 1520 wrote to memory of 2776	1520	Auftragsbestätigung 20241107_pdf.com.exe	35
PID 1520 wrote to memory of 2776	1520	Auftragsbestätigung 20241107_pdf.com.exe	35
PID 1520 wrote to memory of 2776	1520	Auftragsbestätigung 20241107_pdf.com.exe	35
PID 1520 wrote to memory of 2776	1520	Auftragsbestätigung 20241107_pdf.com.exe	35
PID 2776 wrote to memory of 2652	2776	outlook.exe	36
PID 2776 wrote to memory of 2652	2776	outlook.exe	36
PID 2776 wrote to memory of 2652	2776	outlook.exe	36
PID 2776 wrote to memory of 2652	2776	outlook.exe	36
PID 2776 wrote to memory of 2652	2776	outlook.exe	36
PID 2776 wrote to memory of 2652	2776	outlook.exe	36
PID 2776 wrote to memory of 2652	2776	outlook.exe	36
PID 2776 wrote to memory of 2652	2776	outlook.exe	36
PID 2776 wrote to memory of 2652	2776	outlook.exe	36
PID 2776 wrote to memory of 2652	2776	outlook.exe	36
PID 2776 wrote to memory of 2652	2776	outlook.exe	36
PID 2776 wrote to memory of 2652	2776	outlook.exe	36
PID 2652 wrote to memory of 1620	2652	outlook.exe	37
PID 2652 wrote to memory of 1620	2652	outlook.exe	37
PID 2652 wrote to memory of 1620	2652	outlook.exe	37
PID 2652 wrote to memory of 1620	2652	outlook.exe	37

C:\Users\Admin\AppData\Local\Temp\Auftragsbestätigung 20241107_pdf.com.exe
"C:\Users\Admin\AppData\Local\Temp\Auftragsbestätigung 20241107_pdf.com.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:328
- C:\Users\Admin\AppData\Local\Temp\Auftragsbestätigung 20241107_pdf.com.exe
  "C:\Users\Admin\AppData\Local\Temp\Auftragsbestätigung 20241107_pdf.com.exe"
  2⤵
  PID:2880
- C:\Users\Admin\AppData\Local\Temp\Auftragsbestätigung 20241107_pdf.com.exe
  "C:\Users\Admin\AppData\Local\Temp\Auftragsbestätigung 20241107_pdf.com.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1520
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Outlook" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2864
- - C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe
    "C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2776
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2652
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "Outlook" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1620

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe

Filesize
3.7MB

MD5
5d350ff6f79df58f29f77fc7b74d892e

SHA1
4cdb861ef0884b613071d7351b3564402722811f

SHA256
bbea0c056d01b506a9a6d37b6aca9147466e65a962f4b140887334e6f4a23b6c

SHA512
758ff980aaf24e66cc45d410c967d3f37aad9a46db9d79b815f222fd8999786637a5df7d7cb74f194b79a0216b35a3a77e8c2c2c8443194b27eef132b07664ff

Download Submit
memory/328-0-0x00000000745EE000-0x00000000745EF000-memory.dmp

Filesize
4KB

Download
memory/328-1-0x0000000001300000-0x00000000016B6000-memory.dmp

Filesize
3.7MB

Download
memory/328-2-0x00000000745E0000-0x0000000074CCE000-memory.dmp

Filesize
6.9MB

Download
memory/328-3-0x00000000745EE000-0x00000000745EF000-memory.dmp

Filesize
4KB

Download
memory/328-4-0x00000000745E0000-0x0000000074CCE000-memory.dmp

Filesize
6.9MB

Download
memory/328-5-0x00000000007D0000-0x00000000007EC000-memory.dmp

Filesize
112KB

Download
memory/328-6-0x000000000AEA0000-0x000000000B206000-memory.dmp

Filesize
3.4MB

Download
memory/328-23-0x00000000745E0000-0x0000000074CCE000-memory.dmp

Filesize
6.9MB

Download
memory/1520-20-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/1520-12-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/1520-22-0x00000000745E0000-0x0000000074CCE000-memory.dmp

Filesize
6.9MB

Download
memory/1520-21-0x00000000745E0000-0x0000000074CCE000-memory.dmp

Filesize
6.9MB

Download
memory/1520-17-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/1520-15-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/1520-9-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/1520-8-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/1520-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1520-7-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/1520-31-0x00000000745E0000-0x0000000074CCE000-memory.dmp

Filesize
6.9MB

Download
memory/2652-42-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2776-32-0x0000000001200000-0x00000000015B6000-memory.dmp

Filesize
3.7MB

Download