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
a856af17dc86a42721d98088fa891bb8
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SHA1
31294c7f45a734b58e30d4430a3e71462da1353b
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SHA256
0cf1af0df1127b395a37d208e74d1b7512e40c90d87ce159912a836da9e45e6f
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SHA512
41b2c930dbafd4d5a302c3b5cfcab6470d4be89d6d6d274928c5b75edf7d4fcb1c77413e88a69c12d75f0e382051025405128e85388612e8670964959fa7ff8a
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SSDEEP
49152:Kvet62XlaSFNWPjljiFa2RoUYIfORJ6sbR3LoGd3MTHHB72eh2NT:Kvu62XlaSFNWPjljiFXRoUYIfORJ62
Malware Config
Extracted
quasar
1.4.1
Office04
10.0.0.236:4782
8eab765f-f569-4ea8-817b-dd5d17111e06
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encryption_key
4462996B12A7C2645E41DC09FEC3A2A198EEBF4E
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install_name
Client.exe
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log_directory
Logskjey
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reconnect_delay
500
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startup_key
SubDir
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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: 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