Analysis
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max time kernel
145s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
01-06-2024 07:42
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe
Resource
win10v2004-20240226-en
General
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Target
2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe
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Size
168KB
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MD5
948fc3db93f39956720672a129137317
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SHA1
d495202dc69bc9e0eaf51cddeca0d5168417eda9
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SHA256
460b7f1e0a91b9c5ab96217d923d2f164b439fbbfac76e1245ca8d08ebe47216
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SHA512
c6ded6b00ec81a418cb3b43de9fb92b7320477e8aecaf779538d062e0d6204e290c37f8f97c1ed7f1df3ea9ddd9df0002ac2f786b800e883b8dab329a11200bd
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SSDEEP
3072:ZRpAyazIliazTIR5nf2BKJUD8yMujohKNUDAmQoBCYA:xZ8azUR5nfZi8yMuGAZoHA
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
KKAs03FUKDjWfJb.exeCTS.exepid Process 4504 KKAs03FUKDjWfJb.exe 3768 CTS.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:
2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exeCTS.exedescription ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-01_948fc3db93f39956720672a129137317_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:
2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exeCTS.exedescription ioc Process File created C:\Windows\CTS.exe 2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exeCTS.exedescription pid Process Token: SeDebugPrivilege 2136 2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe Token: SeDebugPrivilege 3768 CTS.exe -
Suspicious use of WriteProcessMemory 5 IoCs
Processes:
2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exedescription pid Process procid_target PID 2136 wrote to memory of 4504 2136 2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe 91 PID 2136 wrote to memory of 4504 2136 2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe 91 PID 2136 wrote to memory of 3768 2136 2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe 92 PID 2136 wrote to memory of 3768 2136 2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe 92 PID 2136 wrote to memory of 3768 2136 2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe 92
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2136 -
C:\Users\Admin\AppData\Local\Temp\KKAs03FUKDjWfJb.exeC:\Users\Admin\AppData\Local\Temp\KKAs03FUKDjWfJb.exe2⤵
- Executes dropped EXE
PID:4504
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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:3768
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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=4048 --field-trial-handle=2292,i,2103142837140538807,15881446839139365070,262144 --variations-seed-version /prefetch:81⤵PID:2256
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
789KB
MD5b23cdfcf9b0015c42cbd20381fb13a60
SHA1658ac2c6b8daa3bf3564883ca9c6fafabc78dd97
SHA2560620943920a63ac48ddb5309e5480b85343778ef21cc182e56f46b010585010a
SHA51293a5eacedda5bfc6c3a865aee0f452b2409d565625eacaa777e4d9a089d28746d143036dedb16b0a52522ff2e46ffa9bc3cf1a501cf6e76a13fcd464458d26f5
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Filesize
97KB
MD50655a0af4a2ff9bf591f614ba8f5721f
SHA1b10d53dccec179109aff61b86ecca65be816f3c4
SHA256d1a473a0dd813bd3565b810dcb8ff8bc7907478a994c564d55200925894e0d32
SHA5129051043e6711b1f1b73f4137a8e4c16362c6be5d6c01b15f0430920ce096adf0b9f6a344462aadc5c2847ab5c0d9682df13803351449462dc5dda6059319d45f
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432