quasar | ce54308e4ba6119f23d6e430e936d1f7dc5f8156c61003e05883c7adbf94e9d9

Analysis

max time kernel
127s
max time network
137s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
10-02-2025 15:15

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General

Target

QuoteRFQ00926720250204.pdf39kb.exe
Size

3.6MB
MD5

07a4d2a1981e4159e744e3f0bb8d655f
SHA1

fe47d1646972e85667408a28d8db2f2c17b7a313
SHA256

ce54308e4ba6119f23d6e430e936d1f7dc5f8156c61003e05883c7adbf94e9d9
SHA512

b03cd73c43a0e6a536857b523fa5c96910bf8a73002bb4bd7b8315f951eb9e1f625e3e3804a31cec689b6d8a427df600547cf4becf8494c3c3397a2382a55a4e
SSDEEP

98304:6inq/fUlXQu4UB5uq8yPk4KVJgGSg/RSpSTddPTC:3q/fyD4UAlyfKV7Sg/QwTrP

Score

10^/10

quasar es code discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

ES CODE

twart.myfirewall.org:9792

rency.ydns.eu:5287

wqo9.firewall-gateway.de:8841

code1.ydns.eu:5287

wqo9.firewall-gateway.de:9792

Mutex

025351e291-5d1041-4fa37-932c7-8L69aeiQec514992

Attributes

encryption_key
3145298725BA5E0DD56E87FFE3F8898EA81E6EDA
install_name
Excelworkbook.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/2840-20-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2840-17-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2840-15-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2840-12-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2840-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
264	Excelworkbook.exe
2036	Excelworkbook.exe

Loads dropped DLL 2 IoCs

pid	Process
2840	QuoteRFQ00926720250204.pdf39kb.exe
2840	QuoteRFQ00926720250204.pdf39kb.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2816 set thread context of 2840	2816	QuoteRFQ00926720250204.pdf39kb.exe	31
PID 264 set thread context of 2036	264	Excelworkbook.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	QuoteRFQ00926720250204.pdf39kb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	QuoteRFQ00926720250204.pdf39kb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Excelworkbook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Excelworkbook.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
2580	schtasks.exe
1980	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2816	QuoteRFQ00926720250204.pdf39kb.exe
2816	QuoteRFQ00926720250204.pdf39kb.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2816	QuoteRFQ00926720250204.pdf39kb.exe
Token: SeDebugPrivilege	2840	QuoteRFQ00926720250204.pdf39kb.exe
Token: SeDebugPrivilege	2036	Excelworkbook.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2036	Excelworkbook.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 2816 wrote to memory of 2552	2816	QuoteRFQ00926720250204.pdf39kb.exe	30
PID 2816 wrote to memory of 2552	2816	QuoteRFQ00926720250204.pdf39kb.exe	30
PID 2816 wrote to memory of 2552	2816	QuoteRFQ00926720250204.pdf39kb.exe	30
PID 2816 wrote to memory of 2552	2816	QuoteRFQ00926720250204.pdf39kb.exe	30
PID 2816 wrote to memory of 2840	2816	QuoteRFQ00926720250204.pdf39kb.exe	31
PID 2816 wrote to memory of 2840	2816	QuoteRFQ00926720250204.pdf39kb.exe	31
PID 2816 wrote to memory of 2840	2816	QuoteRFQ00926720250204.pdf39kb.exe	31
PID 2816 wrote to memory of 2840	2816	QuoteRFQ00926720250204.pdf39kb.exe	31
PID 2816 wrote to memory of 2840	2816	QuoteRFQ00926720250204.pdf39kb.exe	31
PID 2816 wrote to memory of 2840	2816	QuoteRFQ00926720250204.pdf39kb.exe	31
PID 2816 wrote to memory of 2840	2816	QuoteRFQ00926720250204.pdf39kb.exe	31
PID 2816 wrote to memory of 2840	2816	QuoteRFQ00926720250204.pdf39kb.exe	31
PID 2816 wrote to memory of 2840	2816	QuoteRFQ00926720250204.pdf39kb.exe	31
PID 2840 wrote to memory of 2580	2840	QuoteRFQ00926720250204.pdf39kb.exe	32
PID 2840 wrote to memory of 2580	2840	QuoteRFQ00926720250204.pdf39kb.exe	32
PID 2840 wrote to memory of 2580	2840	QuoteRFQ00926720250204.pdf39kb.exe	32
PID 2840 wrote to memory of 2580	2840	QuoteRFQ00926720250204.pdf39kb.exe	32
PID 2840 wrote to memory of 264	2840	QuoteRFQ00926720250204.pdf39kb.exe	34
PID 2840 wrote to memory of 264	2840	QuoteRFQ00926720250204.pdf39kb.exe	34
PID 2840 wrote to memory of 264	2840	QuoteRFQ00926720250204.pdf39kb.exe	34
PID 2840 wrote to memory of 264	2840	QuoteRFQ00926720250204.pdf39kb.exe	34
PID 264 wrote to memory of 2036	264	Excelworkbook.exe	36
PID 264 wrote to memory of 2036	264	Excelworkbook.exe	36
PID 264 wrote to memory of 2036	264	Excelworkbook.exe	36
PID 264 wrote to memory of 2036	264	Excelworkbook.exe	36
PID 264 wrote to memory of 2036	264	Excelworkbook.exe	36
PID 264 wrote to memory of 2036	264	Excelworkbook.exe	36
PID 264 wrote to memory of 2036	264	Excelworkbook.exe	36
PID 264 wrote to memory of 2036	264	Excelworkbook.exe	36
PID 264 wrote to memory of 2036	264	Excelworkbook.exe	36
PID 2036 wrote to memory of 1980	2036	Excelworkbook.exe	37
PID 2036 wrote to memory of 1980	2036	Excelworkbook.exe	37
PID 2036 wrote to memory of 1980	2036	Excelworkbook.exe	37
PID 2036 wrote to memory of 1980	2036	Excelworkbook.exe	37

C:\Users\Admin\AppData\Local\Temp\QuoteRFQ00926720250204.pdf39kb.exe
"C:\Users\Admin\AppData\Local\Temp\QuoteRFQ00926720250204.pdf39kb.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2816
- C:\Users\Admin\AppData\Local\Temp\QuoteRFQ00926720250204.pdf39kb.exe
  "C:\Users\Admin\AppData\Local\Temp\QuoteRFQ00926720250204.pdf39kb.exe"
  2⤵
  PID:2552
- C:\Users\Admin\AppData\Local\Temp\QuoteRFQ00926720250204.pdf39kb.exe
  "C:\Users\Admin\AppData\Local\Temp\QuoteRFQ00926720250204.pdf39kb.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2840
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "pdfdocument" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2580
- - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:264
  - - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2036
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "pdfdocument" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1980

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\Excelworkbook.exe

Filesize
3.6MB

MD5
07a4d2a1981e4159e744e3f0bb8d655f

SHA1
fe47d1646972e85667408a28d8db2f2c17b7a313

SHA256
ce54308e4ba6119f23d6e430e936d1f7dc5f8156c61003e05883c7adbf94e9d9

SHA512
b03cd73c43a0e6a536857b523fa5c96910bf8a73002bb4bd7b8315f951eb9e1f625e3e3804a31cec689b6d8a427df600547cf4becf8494c3c3397a2382a55a4e

Download Submit
memory/264-35-0x00000000011D0000-0x0000000001572000-memory.dmp

Filesize
3.6MB

Download
memory/2036-44-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2816-23-0x0000000073F40000-0x000000007462E000-memory.dmp

Filesize
6.9MB

Download
memory/2816-1-0x0000000000830000-0x0000000000BD2000-memory.dmp

Filesize
3.6MB

Download
memory/2816-2-0x0000000073F40000-0x000000007462E000-memory.dmp

Filesize
6.9MB

Download
memory/2816-3-0x0000000000730000-0x000000000074E000-memory.dmp

Filesize
120KB

Download
memory/2816-4-0x0000000073F4E000-0x0000000073F4F000-memory.dmp

Filesize
4KB

Download
memory/2816-5-0x0000000073F40000-0x000000007462E000-memory.dmp

Filesize
6.9MB

Download
memory/2816-6-0x000000000AEF0000-0x000000000B258000-memory.dmp

Filesize
3.4MB

Download
memory/2816-0-0x0000000073F4E000-0x0000000073F4F000-memory.dmp

Filesize
4KB

Download
memory/2840-20-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2840-15-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2840-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2840-12-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2840-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2840-9-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2840-17-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2840-21-0x0000000073F40000-0x000000007462E000-memory.dmp

Filesize
6.9MB

Download
memory/2840-22-0x0000000073F40000-0x000000007462E000-memory.dmp

Filesize
6.9MB

Download
memory/2840-34-0x0000000073F40000-0x000000007462E000-memory.dmp

Filesize
6.9MB

Download
memory/2840-7-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download