Analysis
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max time kernel
141s -
max time network
161s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
28-04-2024 03:41
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-28_8bea5926566c99b41792e9e507fcca75_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-28_8bea5926566c99b41792e9e507fcca75_bkransomware.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-28_8bea5926566c99b41792e9e507fcca75_bkransomware.exe
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Size
11.8MB
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MD5
8bea5926566c99b41792e9e507fcca75
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SHA1
027b49bd9c7192d86c388d81693ac7a98348a555
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SHA256
96e53d592f869b31e1962f4584e064adbc2dbe75ff83cac7456b574fdac1d613
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SHA512
85928a54da7b7d8640453e30cfec7cf0c11949612398ceedd263af7cb8539e79f5037207b7301dd0c5f108fe1cf0ece1050e96452affde0d9c983df56adb9339
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SSDEEP
196608:hfYZ2jMVX/y31/sy19tUApOcj2pKztxktwu3a0zqpXMLcZXj33kkNfbVPPs:RwqlsylzO/pWtxk/A8oZXjUkRbW
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
DPSGjIbgvUbWVEf.exeCTS.exepid process 4668 DPSGjIbgvUbWVEf.exe 4380 CTS.exe -
Loads dropped DLL 5 IoCs
Processes:
DPSGjIbgvUbWVEf.exepid process 4668 DPSGjIbgvUbWVEf.exe 4668 DPSGjIbgvUbWVEf.exe 4668 DPSGjIbgvUbWVEf.exe 4668 DPSGjIbgvUbWVEf.exe 4668 DPSGjIbgvUbWVEf.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
Processes:
2024-04-28_8bea5926566c99b41792e9e507fcca75_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-04-28_8bea5926566c99b41792e9e507fcca75_bkransomware.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" CTS.exe -
Drops file in Windows directory 2 IoCs
Processes:
2024-04-28_8bea5926566c99b41792e9e507fcca75_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-04-28_8bea5926566c99b41792e9e507fcca75_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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NSIS installer 2 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\DPSGjIbgvUbWVEf.exe nsis_installer_1 C:\Users\Admin\AppData\Local\Temp\DPSGjIbgvUbWVEf.exe nsis_installer_2 -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-04-28_8bea5926566c99b41792e9e507fcca75_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 4656 2024-04-28_8bea5926566c99b41792e9e507fcca75_bkransomware.exe Token: SeDebugPrivilege 4380 CTS.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
2024-04-28_8bea5926566c99b41792e9e507fcca75_bkransomware.exedescription pid process target process PID 4656 wrote to memory of 4668 4656 2024-04-28_8bea5926566c99b41792e9e507fcca75_bkransomware.exe DPSGjIbgvUbWVEf.exe PID 4656 wrote to memory of 4668 4656 2024-04-28_8bea5926566c99b41792e9e507fcca75_bkransomware.exe DPSGjIbgvUbWVEf.exe PID 4656 wrote to memory of 4668 4656 2024-04-28_8bea5926566c99b41792e9e507fcca75_bkransomware.exe DPSGjIbgvUbWVEf.exe PID 4656 wrote to memory of 4380 4656 2024-04-28_8bea5926566c99b41792e9e507fcca75_bkransomware.exe CTS.exe PID 4656 wrote to memory of 4380 4656 2024-04-28_8bea5926566c99b41792e9e507fcca75_bkransomware.exe CTS.exe PID 4656 wrote to memory of 4380 4656 2024-04-28_8bea5926566c99b41792e9e507fcca75_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-28_8bea5926566c99b41792e9e507fcca75_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-28_8bea5926566c99b41792e9e507fcca75_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4656 -
C:\Users\Admin\AppData\Local\Temp\DPSGjIbgvUbWVEf.exeC:\Users\Admin\AppData\Local\Temp\DPSGjIbgvUbWVEf.exe2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:4668 -
C:\Windows\CTS.exe"C:\Windows\CTS.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:4380
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3716 --field-trial-handle=2252,i,16504368816373493055,9578615028378602855,262144 --variations-seed-version /prefetch:81⤵PID:4500
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xmlFilesize
789KB
MD59c976f2b0a31f41cb47ba21b8f6a330f
SHA1dc325fa1b41f72cbc1cc59473250427edf5f7670
SHA2564d635bdc2e20caf68d732185c77b6ccc269d969dc2d2033542209fb114827358
SHA512219643086d36c029b783eac2236bfdf70fb409a883bcadf825499b07123578445d9a8eaf9a60c644eac9e57c91516a0ca6a75837923a9155f3605a31d1f130b5
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C:\Users\Admin\AppData\Local\Temp\DPSGjIbgvUbWVEf.exeFilesize
11.7MB
MD5d50d5712566f1df16b5aea21b9e0ee24
SHA1f442aa68ec8d838625f382bcf273f5d0f66427ea
SHA256e102238100a8b97d22559065e3b19379757aeda932c36916d2c84a4178921854
SHA512f9b8d6762a8b00392519b949083d5f0a3670ed24583ed4aaa7570cbc24914e0c19933486004d8949fbee930b8f0e66b50a05e3c478c193ba269677dcd619d7d0
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C:\Users\Admin\AppData\Local\Temp\nsd1932.tmp\InstallOptions.dllFilesize
14KB
MD5d753362649aecd60ff434adf171a4e7f
SHA13b752ad064e06e21822c8958ae22e9a6bb8cf3d0
SHA2568f24c6cf0b06d18f3c07e7bfca4e92afce71834663746cfaa9ddf52a25d5c586
SHA51241bf41add275867553fa3bd8835cd7e2a2a362a2d5670ccbfad23700448bad9fe0f577fb6ee9d4eb81dfc10d463b325b8a873fe5912eb580936d4ad96587aa6d
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C:\Users\Admin\AppData\Local\Temp\nsd1932.tmp\System.dllFilesize
10KB
MD556a321bd011112ec5d8a32b2f6fd3231
SHA1df20e3a35a1636de64df5290ae5e4e7572447f78
SHA256bb6df93369b498eaa638b0bcdc4bb89f45e9b02ca12d28bcedf4629ea7f5e0f1
SHA5125354890cbc53ce51081a78c64ba9c4c8c4dc9e01141798c1e916e19c5776dac7c82989fad0f08c73e81aaba332dad81205f90d0663119af45550b97b338b9cc3
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C:\Users\Admin\AppData\Local\Temp\nsd1932.tmp\UserInfo.dllFilesize
4KB
MD5e840e7f30c85e22b09a41098ff3f3343
SHA1ad1eb7b2ba66ae87641947025736c67efbc4b9d8
SHA2566707e9e88dec460c2cf421bd2bc6a314f15717527cb60dcad2fbb7352ae711a3
SHA512ea1362c9e7ac9666d6cbfc02939a6e9c411f6aef113dc8ec898c383fc4ecf9d957c6ad8f75c33847d5da0b4427c861f0ccaf240cb1def189313de2948881dc1b
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C:\Users\Admin\AppData\Local\Temp\nsd1932.tmp\ioSpecial.iniFilesize
700B
MD59bb2274d8487b1e3fab8f943d8cb89c3
SHA1c48cde2c21b73bbeb2728e0c08101b8b22f4c270
SHA256214b7a56e7eaa4ce38e4db08be1368fa87367db6b1a10fc820ecceb495e87d49
SHA5124671d1188a5d607f23cf17174c5d081d15d3d44c37f9bb1db37990befadbc89fb9be3f5e0d4cc617cc04fe9f9cde9e891b6cfa5042149229e225375edde8bcdd
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C:\Windows\CTS.exeFilesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432