quasar | dd3327f64a3fc29bea7c2d471b45de1b160049f190b203c39528a3147ac454b1

Analysis

max time kernel
93s
max time network
294s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20-01-2025 00:32

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General

Target

BMH - RFQ2496_PO 08775622879.pdf(87kb).exe
Size

3.7MB
MD5

5e7c5ad79db7ddb5867b002a04c9e7d8
SHA1

acc0f60295a3d0908ed55b9b2fe3569c67e4ed75
SHA256

dd3327f64a3fc29bea7c2d471b45de1b160049f190b203c39528a3147ac454b1
SHA512

bf7d1273c76748466546175f3a5d6724c4489efb8d0728833755440e5b25ba28b8893955d08763425f80e1b6ee0b9bc81ebbb60cfa4743f390e16a95d62e4a44
SSDEEP

98304:v7hEn5rk4+sB6Izr4WPAbHheFWrWl3dj8h8xDPE:DhE5nboy4WeHheUM3yh818

Score

10^/10

quasar code discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

CODE

twart.myfirewall.org:9792

rency.ydns.eu:5287

wqo9.firewall-gateway.de:8841

code1.ydns.eu:5287

wqo9.firewall-gateway.de:9792

Mutex

025351e291-5d1041-4fa37-932c7-869aeiQec514992

Attributes

encryption_key
3145298725BA5E0DD56E87FFE3F8898EA81E6EDA
install_name
Exccelworkbook.exe
log_directory
Logs
reconnect_delay
6000
startup_key
pdfdocument
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

resource	yara_rule
behavioral2/memory/1960-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
2144	Exccelworkbook.exe
4892	Exccelworkbook.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4444 set thread context of 1960	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	93
PID 2144 set thread context of 4892	2144	Exccelworkbook.exe	105

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	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Exccelworkbook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Exccelworkbook.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
1308	schtasks.exe
3964	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe
4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe
4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe
4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe
4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe
4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe
Token: SeDebugPrivilege	1960	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe
Token: SeDebugPrivilege	4892	Exccelworkbook.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4892	Exccelworkbook.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 4444 wrote to memory of 3020	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	90
PID 4444 wrote to memory of 3020	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	90
PID 4444 wrote to memory of 3020	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	90
PID 4444 wrote to memory of 644	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	91
PID 4444 wrote to memory of 644	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	91
PID 4444 wrote to memory of 644	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	91
PID 4444 wrote to memory of 116	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	92
PID 4444 wrote to memory of 116	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	92
PID 4444 wrote to memory of 116	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	92
PID 4444 wrote to memory of 1960	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	93
PID 4444 wrote to memory of 1960	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	93
PID 4444 wrote to memory of 1960	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	93
PID 4444 wrote to memory of 1960	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	93
PID 4444 wrote to memory of 1960	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	93
PID 4444 wrote to memory of 1960	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	93
PID 4444 wrote to memory of 1960	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	93
PID 4444 wrote to memory of 1960	4444	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	93
PID 1960 wrote to memory of 1308	1960	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	96
PID 1960 wrote to memory of 1308	1960	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	96
PID 1960 wrote to memory of 1308	1960	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	96
PID 1960 wrote to memory of 2144	1960	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	98
PID 1960 wrote to memory of 2144	1960	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	98
PID 1960 wrote to memory of 2144	1960	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	98
PID 2144 wrote to memory of 4892	2144	Exccelworkbook.exe	105
PID 2144 wrote to memory of 4892	2144	Exccelworkbook.exe	105
PID 2144 wrote to memory of 4892	2144	Exccelworkbook.exe	105
PID 2144 wrote to memory of 4892	2144	Exccelworkbook.exe	105
PID 2144 wrote to memory of 4892	2144	Exccelworkbook.exe	105
PID 2144 wrote to memory of 4892	2144	Exccelworkbook.exe	105
PID 2144 wrote to memory of 4892	2144	Exccelworkbook.exe	105
PID 2144 wrote to memory of 4892	2144	Exccelworkbook.exe	105
PID 4892 wrote to memory of 3964	4892	Exccelworkbook.exe	106
PID 4892 wrote to memory of 3964	4892	Exccelworkbook.exe	106
PID 4892 wrote to memory of 3964	4892	Exccelworkbook.exe	106

C:\Users\Admin\AppData\Local\Temp\BMH - RFQ2496_PO 08775622879.pdf(87kb).exe
"C:\Users\Admin\AppData\Local\Temp\BMH - RFQ2496_PO 08775622879.pdf(87kb).exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4444
- C:\Users\Admin\AppData\Local\Temp\BMH - RFQ2496_PO 08775622879.pdf(87kb).exe
  "C:\Users\Admin\AppData\Local\Temp\BMH - RFQ2496_PO 08775622879.pdf(87kb).exe"
  2⤵
  PID:3020
- C:\Users\Admin\AppData\Local\Temp\BMH - RFQ2496_PO 08775622879.pdf(87kb).exe
  "C:\Users\Admin\AppData\Local\Temp\BMH - RFQ2496_PO 08775622879.pdf(87kb).exe"
  2⤵
  PID:644
- C:\Users\Admin\AppData\Local\Temp\BMH - RFQ2496_PO 08775622879.pdf(87kb).exe
  "C:\Users\Admin\AppData\Local\Temp\BMH - RFQ2496_PO 08775622879.pdf(87kb).exe"
  2⤵
  PID:116
- C:\Users\Admin\AppData\Local\Temp\BMH - RFQ2496_PO 08775622879.pdf(87kb).exe
  "C:\Users\Admin\AppData\Local\Temp\BMH - RFQ2496_PO 08775622879.pdf(87kb).exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1960
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "pdfdocument" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1308
- - C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2144
  - - C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:4892
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "pdfdocument" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:3964

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

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\BMH - RFQ2496_PO 08775622879.pdf(87kb).exe.log

Filesize
1KB

MD5
8ec831f3e3a3f77e4a7b9cd32b48384c

SHA1
d83f09fd87c5bd86e045873c231c14836e76a05c

SHA256
7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

SHA512
26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe

Filesize
3.7MB

MD5
5e7c5ad79db7ddb5867b002a04c9e7d8

SHA1
acc0f60295a3d0908ed55b9b2fe3569c67e4ed75

SHA256
dd3327f64a3fc29bea7c2d471b45de1b160049f190b203c39528a3147ac454b1

SHA512
bf7d1273c76748466546175f3a5d6724c4489efb8d0728833755440e5b25ba28b8893955d08763425f80e1b6ee0b9bc81ebbb60cfa4743f390e16a95d62e4a44

Download Submit
memory/1960-22-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/1960-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/1960-15-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/1960-13-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/2144-28-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/2144-24-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/2144-23-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/4444-6-0x0000000005620000-0x00000000056BC000-memory.dmp

Filesize
624KB

Download
memory/4444-0-0x000000007456E000-0x000000007456F000-memory.dmp

Filesize
4KB

Download
memory/4444-1-0x00000000005E0000-0x000000000099E000-memory.dmp

Filesize
3.7MB

Download
memory/4444-8-0x000000007456E000-0x000000007456F000-memory.dmp

Filesize
4KB

Download
memory/4444-14-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/4444-4-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/4444-3-0x00000000053F0000-0x0000000005482000-memory.dmp

Filesize
584KB

Download
memory/4444-9-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/4444-7-0x0000000005840000-0x000000000585C000-memory.dmp

Filesize
112KB

Download
memory/4444-10-0x0000000006660000-0x00000000069C8000-memory.dmp

Filesize
3.4MB

Download
memory/4444-2-0x00000000059A0000-0x0000000005F44000-memory.dmp

Filesize
5.6MB

Download
memory/4444-5-0x00000000053A0000-0x00000000053AA000-memory.dmp

Filesize
40KB

Download
memory/4892-29-0x0000000006AF0000-0x0000000007108000-memory.dmp

Filesize
6.1MB

Download
memory/4892-30-0x0000000006620000-0x0000000006670000-memory.dmp

Filesize
320KB

Download
memory/4892-31-0x0000000006890000-0x0000000006942000-memory.dmp

Filesize
712KB

Download
memory/4892-34-0x0000000006AD0000-0x0000000006AE2000-memory.dmp

Filesize
72KB

Download
memory/4892-35-0x0000000007C50000-0x0000000007C8C000-memory.dmp

Filesize
240KB

Download
memory/4892-36-0x0000000007D00000-0x0000000007D66000-memory.dmp

Filesize
408KB

Download