quasar | dd3327f64a3fc29bea7c2d471b45de1b160049f190b203c39528a3147ac454b1

Analysis

max time kernel
293s
max time network
295s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03-02-2025 00:33

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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 5 IoCs

resource	yara_rule
behavioral1/memory/3048-13-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/3048-18-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/3048-10-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/3048-9-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/3048-15-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
2600	Exccelworkbook.exe
2140	Exccelworkbook.exe

Loads dropped DLL 2 IoCs

pid	Process
3048	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe
3048	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3028 set thread context of 3048	3028	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	30
PID 2600 set thread context of 2140	2600	Exccelworkbook.exe	35

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	Exccelworkbook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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	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

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
2824	schtasks.exe
1644	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3048	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe
Token: SeDebugPrivilege	2140	Exccelworkbook.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2140	Exccelworkbook.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3028 wrote to memory of 3048	3028	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	30
PID 3028 wrote to memory of 3048	3028	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	30
PID 3028 wrote to memory of 3048	3028	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	30
PID 3028 wrote to memory of 3048	3028	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	30
PID 3028 wrote to memory of 3048	3028	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	30
PID 3028 wrote to memory of 3048	3028	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	30
PID 3028 wrote to memory of 3048	3028	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	30
PID 3028 wrote to memory of 3048	3028	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	30
PID 3028 wrote to memory of 3048	3028	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	30
PID 3048 wrote to memory of 2824	3048	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	31
PID 3048 wrote to memory of 2824	3048	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	31
PID 3048 wrote to memory of 2824	3048	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	31
PID 3048 wrote to memory of 2824	3048	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	31
PID 3048 wrote to memory of 2600	3048	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	33
PID 3048 wrote to memory of 2600	3048	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	33
PID 3048 wrote to memory of 2600	3048	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	33
PID 3048 wrote to memory of 2600	3048	BMH - RFQ2496_PO 08775622879.pdf(87kb).exe	33
PID 2600 wrote to memory of 2140	2600	Exccelworkbook.exe	35
PID 2600 wrote to memory of 2140	2600	Exccelworkbook.exe	35
PID 2600 wrote to memory of 2140	2600	Exccelworkbook.exe	35
PID 2600 wrote to memory of 2140	2600	Exccelworkbook.exe	35
PID 2600 wrote to memory of 2140	2600	Exccelworkbook.exe	35
PID 2600 wrote to memory of 2140	2600	Exccelworkbook.exe	35
PID 2600 wrote to memory of 2140	2600	Exccelworkbook.exe	35
PID 2600 wrote to memory of 2140	2600	Exccelworkbook.exe	35
PID 2600 wrote to memory of 2140	2600	Exccelworkbook.exe	35
PID 2140 wrote to memory of 1644	2140	Exccelworkbook.exe	36
PID 2140 wrote to memory of 1644	2140	Exccelworkbook.exe	36
PID 2140 wrote to memory of 1644	2140	Exccelworkbook.exe	36
PID 2140 wrote to memory of 1644	2140	Exccelworkbook.exe	36

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 use of WriteProcessMemory
PID:3028
- 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⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3048
- - 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:2824
- - 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:2600
  - - 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:2140
    - - 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:1644

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\SubDir\Exccelworkbook.exe

Filesize
3.7MB

MD5
5e7c5ad79db7ddb5867b002a04c9e7d8

SHA1
acc0f60295a3d0908ed55b9b2fe3569c67e4ed75

SHA256
dd3327f64a3fc29bea7c2d471b45de1b160049f190b203c39528a3147ac454b1

SHA512
bf7d1273c76748466546175f3a5d6724c4489efb8d0728833755440e5b25ba28b8893955d08763425f80e1b6ee0b9bc81ebbb60cfa4743f390e16a95d62e4a44

Download Submit
memory/2140-42-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2600-33-0x00000000008B0000-0x0000000000C6E000-memory.dmp

Filesize
3.7MB

Download
memory/3028-20-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/3028-4-0x0000000073F1E000-0x0000000073F1F000-memory.dmp

Filesize
4KB

Download
memory/3028-5-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/3028-6-0x00000000086C0000-0x0000000008A28000-memory.dmp

Filesize
3.4MB

Download
memory/3028-1-0x00000000008D0000-0x0000000000C8E000-memory.dmp

Filesize
3.7MB

Download
memory/3028-2-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/3028-3-0x0000000000410000-0x000000000042C000-memory.dmp

Filesize
112KB

Download
memory/3028-0-0x0000000073F1E000-0x0000000073F1F000-memory.dmp

Filesize
4KB

Download
memory/3048-10-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3048-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3048-9-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3048-15-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3048-18-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3048-19-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/3048-21-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/3048-13-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3048-8-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3048-31-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/3048-7-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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