Analysis
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max time kernel
105s -
max time network
142s -
platform
windows10-2004_x64 -
resource
win10v2004-20250314-en -
resource tags
arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system -
submitted
26/03/2025, 19:28
Static task
static1
Behavioral task
behavioral1
Sample
95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe
Resource
win7-20240903-en
General
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Target
95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe
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Size
3.6MB
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MD5
69f3bc0083e17e7c28d06140308b12d8
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SHA1
3d637938626dbb7e63be9da10b83a94997f87f5c
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SHA256
95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb
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SHA512
8f5b3ea0d36a6f7b16a25aa69d9ba93ba2e60e01c48124d049177a9e4b8bc104fa1fabe37eb3cc7b1b39339b15388e6ae89b552d8aae23ffad1b225df9d14681
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SSDEEP
98304:wqiCGJV+6YRVnvrjgZQBB1pKOnTHq3IJYAsUx81J:wXCCYRVnvKOjq4SAsV7
Malware Config
Extracted
quasar
1.4.1
BZ EMY
bz-fnd3.ydns.eu:9841
wqo9.firewall-gateway.de:9792
d9ad6O0279-3e005-4045-b50a-d6b5ff71d693
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encryption_key
3145298725BA5E0DD56E87FFE3F8898EA81E6EDA
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install_name
MSworkbooks.exe
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log_directory
Logs
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reconnect_delay
6000
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startup_key
MSworkbook
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subdirectory
SubDir
Signatures
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Quasar family
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Quasar payload 1 IoCs
resource yara_rule behavioral2/memory/3356-34-0x0000000000400000-0x0000000000724000-memory.dmp family_quasar -
Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
pid Process 5812 powershell.exe 5136 powershell.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-308834014-1004923324-1191300197-1000\Control Panel\International\Geo\Nation 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe Key value queried \REGISTRY\USER\S-1-5-21-308834014-1004923324-1191300197-1000\Control Panel\International\Geo\Nation MSworkbooks.exe -
Executes dropped EXE 2 IoCs
pid Process 5140 MSworkbooks.exe 2000 MSworkbooks.exe -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 4012 set thread context of 3356 4012 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 101 PID 5140 set thread context of 2000 5140 MSworkbooks.exe 114 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 10 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language powershell.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language MSworkbooks.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language powershell.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language MSworkbooks.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 4 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 4708 schtasks.exe 5308 schtasks.exe 5076 schtasks.exe 2248 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 9 IoCs
pid Process 4012 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 5812 powershell.exe 4012 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 5812 powershell.exe 5140 MSworkbooks.exe 5140 MSworkbooks.exe 5136 powershell.exe 5136 powershell.exe 5136 powershell.exe -
Suspicious use of AdjustPrivilegeToken 6 IoCs
description pid Process Token: SeDebugPrivilege 4012 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe Token: SeDebugPrivilege 5812 powershell.exe Token: SeDebugPrivilege 3356 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe Token: SeDebugPrivilege 5140 MSworkbooks.exe Token: SeDebugPrivilege 5136 powershell.exe Token: SeDebugPrivilege 2000 MSworkbooks.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2000 MSworkbooks.exe -
Suspicious use of WriteProcessMemory 37 IoCs
description pid Process procid_target PID 4012 wrote to memory of 5812 4012 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 97 PID 4012 wrote to memory of 5812 4012 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 97 PID 4012 wrote to memory of 5812 4012 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 97 PID 4012 wrote to memory of 4708 4012 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 99 PID 4012 wrote to memory of 4708 4012 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 99 PID 4012 wrote to memory of 4708 4012 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 99 PID 4012 wrote to memory of 3356 4012 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 101 PID 4012 wrote to memory of 3356 4012 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 101 PID 4012 wrote to memory of 3356 4012 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 101 PID 4012 wrote to memory of 3356 4012 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 101 PID 4012 wrote to memory of 3356 4012 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 101 PID 4012 wrote to memory of 3356 4012 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 101 PID 4012 wrote to memory of 3356 4012 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 101 PID 4012 wrote to memory of 3356 4012 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 101 PID 3356 wrote to memory of 5308 3356 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 102 PID 3356 wrote to memory of 5308 3356 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 102 PID 3356 wrote to memory of 5308 3356 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 102 PID 3356 wrote to memory of 5140 3356 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 104 PID 3356 wrote to memory of 5140 3356 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 104 PID 3356 wrote to memory of 5140 3356 95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe 104 PID 5140 wrote to memory of 5136 5140 MSworkbooks.exe 110 PID 5140 wrote to memory of 5136 5140 MSworkbooks.exe 110 PID 5140 wrote to memory of 5136 5140 MSworkbooks.exe 110 PID 5140 wrote to memory of 5076 5140 MSworkbooks.exe 112 PID 5140 wrote to memory of 5076 5140 MSworkbooks.exe 112 PID 5140 wrote to memory of 5076 5140 MSworkbooks.exe 112 PID 5140 wrote to memory of 2000 5140 MSworkbooks.exe 114 PID 5140 wrote to memory of 2000 5140 MSworkbooks.exe 114 PID 5140 wrote to memory of 2000 5140 MSworkbooks.exe 114 PID 5140 wrote to memory of 2000 5140 MSworkbooks.exe 114 PID 5140 wrote to memory of 2000 5140 MSworkbooks.exe 114 PID 5140 wrote to memory of 2000 5140 MSworkbooks.exe 114 PID 5140 wrote to memory of 2000 5140 MSworkbooks.exe 114 PID 5140 wrote to memory of 2000 5140 MSworkbooks.exe 114 PID 2000 wrote to memory of 2248 2000 MSworkbooks.exe 115 PID 2000 wrote to memory of 2248 2000 MSworkbooks.exe 115 PID 2000 wrote to memory of 2248 2000 MSworkbooks.exe 115
Processes
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C:\Users\Admin\AppData\Local\Temp\95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe"C:\Users\Admin\AppData\Local\Temp\95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4012 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\AFENhLHxFPepR.exe"2⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:5812
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\AFENhLHxFPepR" /XML "C:\Users\Admin\AppData\Local\Temp\tmpABFF.tmp"2⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:4708
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C:\Users\Admin\AppData\Local\Temp\95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe"C:\Users\Admin\AppData\Local\Temp\95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe"2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3356 -
C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "MSworkbook" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\MSworkbooks.exe" /rl HIGHEST /f3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:5308
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C:\Users\Admin\AppData\Roaming\SubDir\MSworkbooks.exe"C:\Users\Admin\AppData\Roaming\SubDir\MSworkbooks.exe"3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5140 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\AFENhLHxFPepR.exe"4⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:5136
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\AFENhLHxFPepR" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF77F.tmp"4⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:5076
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C:\Users\Admin\AppData\Roaming\SubDir\MSworkbooks.exe"C:\Users\Admin\AppData\Roaming\SubDir\MSworkbooks.exe"4⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2000 -
C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "MSworkbook" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\MSworkbooks.exe" /rl HIGHEST /f5⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:2248
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe.log
Filesize1KB
MD58ec831f3e3a3f77e4a7b9cd32b48384c
SHA1d83f09fd87c5bd86e045873c231c14836e76a05c
SHA2567667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982
SHA51226bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3
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Filesize
2KB
MD5968cb9309758126772781b83adb8a28f
SHA18da30e71accf186b2ba11da1797cf67f8f78b47c
SHA25692099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a
SHA5124bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3
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Filesize
18KB
MD529e0828a0c0a47dcbf4edf5f7bc840c4
SHA1ce22beba4c59ac80190ac79f94e29bbdafc2250b
SHA25654b21c0a6589e3894f5582ed394d0b1a820b48946a03bec74d2eb2bffc8ae51e
SHA5126279647729faf8a9fccc96bf42eb37d31173a5948ada1935fb9478c5c6ea4781e1212ec3ae2bdbc7fc680db695a01a7ff19c431d230ecda4251808df7c1d7976
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
1KB
MD50adfcb7ef0b18b5875ffb18c06f95fb9
SHA13b046d4aae7ae0e50772e8201911743cd72dc2c0
SHA256134a511e0878f88c5730c1e18b4c64c7461f6afc88296658afb009e06af0b3e0
SHA512c5bef06f341d84e251ab185b4b12776502415226f4c58fb35790fccab354914650cf68da47520af47c63ea09b0910adc6344bd9f2fedd25046da806f099e5e50
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Filesize
3.6MB
MD569f3bc0083e17e7c28d06140308b12d8
SHA13d637938626dbb7e63be9da10b83a94997f87f5c
SHA25695586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb
SHA5128f5b3ea0d36a6f7b16a25aa69d9ba93ba2e60e01c48124d049177a9e4b8bc104fa1fabe37eb3cc7b1b39339b15388e6ae89b552d8aae23ffad1b225df9d14681