Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win10-20240221-en
Behavioral task
behavioral2
Sample
Client-built.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral3
Sample
Client-built.exe
Resource
win11-20240221-en
General
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Target
Client-built.exe
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Size
348KB
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MD5
c53aa03a0ce2a1f99625520abdeac86e
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SHA1
c103afc53f82747a7f26259b4b7ce0e7d95894ec
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SHA256
1e7d5bd9d85650996c6576118409b53d0c677e4035baa3f4d2641d5e9a0b16f9
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SHA512
c13a5135795ca9b45273e8399ec393628926a68bfbe77df343c213f09caeeadfd865cfcaf4cdc3deab72d8ab578b86672afac4fcb48f2e59c39bfc38b338ac64
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SSDEEP
6144:CbqQ4i1FFiEKNpSJKl50buogFdmGQQhsrD8DCcIYjvOO:cpliqKl5ToAIGQQh8ID9ICvOO
Malware Config
Extracted
quasar
1.3.0.0
Office04
Vallithebest-32755.portmap.host:32755
QSR_MUTEX_3gXoc7Rbb6gDK9k7Ha
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encryption_key
NZgldVKwqeCAFECpbpDa
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install_name
WindowsSound.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
AuthClient.exe
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subdirectory
SubDir
Signatures
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Quasar family
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Quasar payload 1 IoCs
resource yara_rule sample family_quasar -
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource Client-built.exe
Files
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Client-built.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: 345KB - Virtual size: 344KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 2KB - 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