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Analysis
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max time kernel
140s -
max time network
121s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
22/04/2024, 02:41
Static task
static1
Behavioral task
behavioral1
Sample
bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e.exe
Resource
win10v2004-20240412-en
General
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Target
bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e.exe
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Size
216KB
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MD5
49a21a87f5b39acab9a20a104f02e7b6
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SHA1
4672aee46df932707920206e0b291ada977c124f
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SHA256
bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e
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SHA512
072d1c4de957d93255ed81ffc10031fcf5110e40306d6dd9c7cba30920cf16c1edd0724b8c19dcff65ed043eb45823a04cdaf30c5e84cf4419622d5d4a757690
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SSDEEP
3072:SPUHpiKT2t2UHIu05W7SAFJJOUD9cckiKop97f3r8n9t9Ygntw+:/rTfUHeeSKOS9ccFKk3Y9t9YZ+
Malware Config
Signatures
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UPX dump on OEP (original entry point) 20 IoCs
resource yara_rule behavioral1/memory/2268-7-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral1/files/0x000c0000000122e4-8.dat UPX behavioral1/memory/2268-10-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral1/memory/1680-12-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral1/memory/1680-14-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral1/memory/1680-15-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral1/memory/1680-18-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral1/memory/1680-19-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral1/memory/1680-26-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral1/memory/1680-27-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral1/memory/1680-35-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral1/memory/1680-36-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral1/memory/1680-42-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral1/memory/1680-43-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral1/memory/1680-50-0x00000000045B0000-0x0000000005859000-memory.dmp UPX behavioral1/memory/1680-51-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral1/memory/1680-53-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral1/memory/1680-61-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral1/memory/1680-62-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral1/memory/1680-74-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 1680 Isass.exe -
Loads dropped DLL 2 IoCs
pid Process 2268 bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e.exe 2268 bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe" bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe" bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 2268 bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e.exe 1680 Isass.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2268 wrote to memory of 1680 2268 bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e.exe 28 PID 2268 wrote to memory of 1680 2268 bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e.exe 28 PID 2268 wrote to memory of 1680 2268 bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e.exe 28 PID 2268 wrote to memory of 1680 2268 bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e.exe"C:\Users\Admin\AppData\Local\Temp\bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e.exe"1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2268 -
C:\Users\Public\Microsoft Build\Isass.exe"C:\Users\Public\Microsoft Build\Isass.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1680
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
216KB
MD549a21a87f5b39acab9a20a104f02e7b6
SHA14672aee46df932707920206e0b291ada977c124f
SHA256bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e
SHA512072d1c4de957d93255ed81ffc10031fcf5110e40306d6dd9c7cba30920cf16c1edd0724b8c19dcff65ed043eb45823a04cdaf30c5e84cf4419622d5d4a757690