Behavioral task
behavioral1
Sample
qqsarbuilder.exe
Resource
win7-20240704-en
General
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Target
qqsar.zip
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Size
1.2MB
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MD5
b5cea43b0d68d382e7fcf6cb6694a16b
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SHA1
70c7d5bc56ca865e65367b776941f3704017d81a
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SHA256
8b33b55bfc95d42f71f7a4556bf4ab365cc8a9657a9a48c4184cf8f4fd1cfdf8
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SHA512
7d4017022e5e02f4eb375294aaf7a29ae63f776b13fe3966723f33fc878a816474d81ed6b1d93141b5741b15099b1bac07ed05a78e6c0c5add45efc838a786d0
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SSDEEP
24576:y7OOroWBIPmfBKxMmHxAx9rvPrJi2r4z6eFpYzlWvON6JyDNG/CzJ7NGek7:0OQ7BIEcq3rvPti2UzdpYkGNI8GKzd8v
Malware Config
Extracted
quasar
1.4.1
Office04
192.168.174.129:4782
4642d254-5910-430f-8e8f-b944ab72b6fd
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encryption_key
F0F78B2B4A3D25098C1C1557DC99FDA4D204F27D
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install_name
windwsupdater.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
windwsupdater
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subdirectory
SubDir
Signatures
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Quasar family
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Quasar payload 1 IoCs
Processes:
resource yara_rule static1/unpack001/qqsarbuilder.exe family_quasar -
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
Processes:
resource unpack001/qqsarbuilder.exe
Files
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qqsar.zip.zip
Password: 123
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qqsarbuilder.exe.exe windows:4 windows x86 arch:x86
Password: 123
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