Behavioral task
behavioral1
Sample
api-ms-win-crt-environment-l1-1-0.exe
Resource
win7-20231215-en
General
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Target
api-ms-win-crt-environment-l1-1-0.exe
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Size
3.1MB
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MD5
8c1e7d74c62a687a236a3262f09269d4
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SHA1
896a403897661d3834f540a10678463f4ef4c81d
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SHA256
9e6fa1f280864e2933528e17984bf2d448b003bda842145f34e63cc8a4b337ef
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SHA512
85f98c7c311c224043a588180ff170290b6e5cffc78edb77cbfbc8bfc662d34b17c7f9a6a9708f769398854284b98e9d14d45229b2f74c19ce52481f4887bc24
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SSDEEP
49152:Pv1A62jiaQDKwPFlJn3xFQsZQOdmRJ6abR3LoGdMoTHHB72eh2NT:Pve62jiaQDKwPFlJn3TQsZQOdmRJ60
Malware Config
Extracted
quasar
1.4.1
svchost
szczurson1337.freemyip.com:63027
480dd827-793e-49b8-b01d-ed2623e7d90a
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encryption_key
6891155C128F5ED55194A86C4A5AB7A3EE3E2C5B
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install_name
api-ms-win-crt-environment-l1-0-1.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
api-ms-win-crt-environment-l1-1-0
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subdirectory
downlevel
Signatures
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Quasar family
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Quasar payload 1 IoCs
Processes:
resource yara_rule sample family_quasar -
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
Processes:
resource api-ms-win-crt-environment-l1-1-0.exe
Files
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api-ms-win-crt-environment-l1-1-0.exe.exe windows:4 windows x86 arch:x86
f34d5f2d4577ed6d9ceec516c1f5a744
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_NO_SEH
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
Imports
mscoree
_CorExeMain
Sections
.text Size: 3.1MB - Virtual size: 3.1MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 3KB - Virtual size: 2KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 512B - Virtual size: 12B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ