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Analysis
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max time kernel
144s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
07/11/2024, 05:41
Behavioral task
behavioral1
Sample
mieldaloco12.exe
Resource
win7-20241010-en
General
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Target
mieldaloco12.exe
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Size
3.1MB
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MD5
4ae7ab9b981922837aae1c86c7f726a3
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SHA1
1783e0788fb2a103d71bc9a05ae2fb85c0d70ee9
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SHA256
b1b8ad9032b829e2ac3956ce8f302745802cd2d5ae686c700796e2f2ee81b0f7
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SHA512
79c4bf39ae1761414b5f37186c2483a4b8755168824d6e783ea9cab26e7c0118f391b6417c622b65ea3ac3924ae745a6abe4838ca1d87671898ad90ae9a18e58
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SSDEEP
49152:Cv+lL26AaNeWgPhlmVqvMQ7XSK6v9y/ZBxOPoGdexMTHHB72eh2NT:CvuL26AaNeWgPhlmVqkQ7XSK64/M2
Malware Config
Extracted
quasar
1.4.1
Office04
Cristopher11sa-62565.portmap.host:62565
e51e2b65-e963-4051-9736-67d57ed46798
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encryption_key
AEA258EF65BF1786F0F767C0BE2497ECC304C46F
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install_name
Client.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Quasar Client Startup
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subdirectory
SubDir
Signatures
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Quasar family
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Quasar payload 2 IoCs
resource yara_rule behavioral2/memory/1296-1-0x0000000000560000-0x0000000000884000-memory.dmp family_quasar behavioral2/files/0x0007000000023cb4-6.dat family_quasar -
Executes dropped EXE 1 IoCs
pid Process 2264 Client.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 4828 schtasks.exe 4220 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1296 mieldaloco12.exe Token: SeDebugPrivilege 2264 Client.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2264 Client.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 1296 wrote to memory of 4828 1296 mieldaloco12.exe 85 PID 1296 wrote to memory of 4828 1296 mieldaloco12.exe 85 PID 1296 wrote to memory of 2264 1296 mieldaloco12.exe 87 PID 1296 wrote to memory of 2264 1296 mieldaloco12.exe 87 PID 2264 wrote to memory of 4220 2264 Client.exe 88 PID 2264 wrote to memory of 4220 2264 Client.exe 88 -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\mieldaloco12.exe"C:\Users\Admin\AppData\Local\Temp\mieldaloco12.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1296 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
PID:4828
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C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2264 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
PID:4220
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.1MB
MD54ae7ab9b981922837aae1c86c7f726a3
SHA11783e0788fb2a103d71bc9a05ae2fb85c0d70ee9
SHA256b1b8ad9032b829e2ac3956ce8f302745802cd2d5ae686c700796e2f2ee81b0f7
SHA51279c4bf39ae1761414b5f37186c2483a4b8755168824d6e783ea9cab26e7c0118f391b6417c622b65ea3ac3924ae745a6abe4838ca1d87671898ad90ae9a18e58