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Analysis
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max time kernel
125s -
max time network
142s -
platform
windows10-2004_x64 -
resource
win10v2004-20240611-en -
resource tags
arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system -
submitted
12/06/2024, 07:49
Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win7-20240508-en
General
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Target
Client-built.exe
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Size
3.1MB
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MD5
60e4077bc5c678f1f89f57715f3e979d
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SHA1
9a49bd9e868772b1bc3db5e88736a807a64c29ed
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SHA256
939efe1ad093f827c7705afba9f48aea6a22b737cfdc8211ddba615138f8524b
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SHA512
708890550f5db31f840475f87039590956593a00d93c852fae59fc84764e51cadb9318bc52efc03becf648292803891bc70a6011622027ecd35ba054d43698cc
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SSDEEP
49152:uv/I22SsaNYfdPBldt698dBcjHh0xNESEbk/iXLoGdtmTHHB72eh2NT:uvQ22SsaNYfdPBldt6+dBcjHCxW7
Malware Config
Extracted
quasar
1.4.1
niga
172.31.32.1:4782
d4922296-6b1c-4eb8-9900-8245ddd677af
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encryption_key
ED126047C03399C2E91AEC0EB5284E8942B0414E
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install_name
asdkwk.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
kreiasad
Signatures
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Quasar payload 2 IoCs
resource yara_rule behavioral2/memory/4736-0-0x0000000000ED0000-0x00000000011F4000-memory.dmp family_quasar behavioral2/files/0x000400000001e82f-6.dat family_quasar -
Executes dropped EXE 1 IoCs
pid Process 948 asdkwk.exe -
Drops file in System32 directory 5 IoCs
description ioc Process File opened for modification C:\Windows\system32\kreiasad\asdkwk.exe asdkwk.exe File opened for modification C:\Windows\system32\kreiasad asdkwk.exe File created C:\Windows\system32\kreiasad\asdkwk.exe Client-built.exe File opened for modification C:\Windows\system32\kreiasad\asdkwk.exe Client-built.exe File opened for modification C:\Windows\system32\kreiasad Client-built.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 4736 Client-built.exe Token: SeDebugPrivilege 948 asdkwk.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 948 asdkwk.exe -
Suspicious use of SendNotifyMessage 1 IoCs
pid Process 948 asdkwk.exe -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 4736 wrote to memory of 948 4736 Client-built.exe 84 PID 4736 wrote to memory of 948 4736 Client-built.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4736 -
C:\Windows\system32\kreiasad\asdkwk.exe"C:\Windows\system32\kreiasad\asdkwk.exe"2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:948
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.1MB
MD560e4077bc5c678f1f89f57715f3e979d
SHA19a49bd9e868772b1bc3db5e88736a807a64c29ed
SHA256939efe1ad093f827c7705afba9f48aea6a22b737cfdc8211ddba615138f8524b
SHA512708890550f5db31f840475f87039590956593a00d93c852fae59fc84764e51cadb9318bc52efc03becf648292803891bc70a6011622027ecd35ba054d43698cc