Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
16-12-2024 06:30
Behavioral task
behavioral1
Sample
spectrum.exe
Resource
win7-20240903-en
General
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Target
spectrum.exe
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Size
502KB
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MD5
1441905fc4082ee6055ea39f5875a6c5
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SHA1
78f91f9f9ffe47e5f47e9844bd026d150146744e
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SHA256
1b05c4d74e0d17a983f9b91aa706a7a60f37ec270b7e2433d6798afa1c7be766
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SHA512
70e9ab0e49b4bf89505f16c499538daebc1e8da72488cd63ff60747d15a1d486ba38802b0622c9240d10ff68ab32e6bb36a0b809e7cd0e2ec4945d023ce86c5c
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SSDEEP
12288:gTEgdfYe/iKg3qFE4/ywNFpdrdwzTCcdj:1UwC5F9ywNFpdJ7cdj
Malware Config
Extracted
quasar
1.4.0
Office04
192.168.31.99:4782
2001:4bc9:1f98:a4e::676:4782
255.255.255.0:4782
fe80::cabf:4cff:fe84:9572%17:4782
1f65a787-81b8-4955-95e4-b7751e10cd50
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encryption_key
A0B82A50BBC49EC084E3E53A9E34DF58BD7050B9
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install_name
Java Updater.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Java Updater
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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/3996-1-0x0000000000420000-0x00000000004A4000-memory.dmp family_quasar behavioral2/files/0x000e000000023bae-5.dat family_quasar -
Executes dropped EXE 1 IoCs
pid Process 3276 Java Updater.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 1588 schtasks.exe 3060 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 3996 spectrum.exe Token: SeDebugPrivilege 3276 Java Updater.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 3276 Java Updater.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 3996 wrote to memory of 1588 3996 spectrum.exe 82 PID 3996 wrote to memory of 1588 3996 spectrum.exe 82 PID 3996 wrote to memory of 3276 3996 spectrum.exe 84 PID 3996 wrote to memory of 3276 3996 spectrum.exe 84 PID 3276 wrote to memory of 3060 3276 Java Updater.exe 85 PID 3276 wrote to memory of 3060 3276 Java Updater.exe 85 -
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\spectrum.exe"C:\Users\Admin\AppData\Local\Temp\spectrum.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3996 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\spectrum.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
PID:1588
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C:\Users\Admin\AppData\Roaming\SubDir\Java Updater.exe"C:\Users\Admin\AppData\Roaming\SubDir\Java Updater.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3276 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Java Updater.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
PID:3060
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
502KB
MD51441905fc4082ee6055ea39f5875a6c5
SHA178f91f9f9ffe47e5f47e9844bd026d150146744e
SHA2561b05c4d74e0d17a983f9b91aa706a7a60f37ec270b7e2433d6798afa1c7be766
SHA51270e9ab0e49b4bf89505f16c499538daebc1e8da72488cd63ff60747d15a1d486ba38802b0622c9240d10ff68ab32e6bb36a0b809e7cd0e2ec4945d023ce86c5c