Analysis
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max time kernel
140s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
11/06/2024, 17:53
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe
Resource
win10v2004-20240226-en
General
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Target
2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe
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Size
72KB
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MD5
56c46bfa121fca06c1325981e6c13195
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SHA1
edec16c5f91bc13d25e9ae17757992202568e246
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SHA256
bfd18f72aab900840cc667f96449dbd01158970223ec1c25df9965ba1ad0b59d
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SHA512
5c34bee7eab727ad5bf276219bfcd46b459fbdcc705374c473825de2a281083e228047fae3fec687cd64e558ac05d3a86cc88bdd7528aef10e4f129b8e6001e2
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT4dD:ZhpAyazIlyazT4dD
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 2916 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
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-11_56c46bfa121fca06c1325981e6c13195_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
description ioc Process File created C:\Windows\CTS.exe 2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 536 2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe Token: SeDebugPrivilege 2916 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 536 wrote to memory of 2916 536 2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe 91 PID 536 wrote to memory of 2916 536 2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe 91 PID 536 wrote to memory of 2916 536 2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:536 -
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:2916
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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=4456 --field-trial-handle=2744,i,16362475727591565961,3676688664819797550,262144 --variations-seed-version /prefetch:81⤵PID:3716
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
789KB
MD5bf54e6a94aad67a4d3486b1a7b710005
SHA1143028dea97021a7e0e73f1b13dba3bf3ed008f4
SHA25603488e832d54c38ec26bbba20f52457998801f44c958ee428c0cce75564ad4ee
SHA512daab54fbdab9cd1062f81d2032796ceb4a8b472c3791a69b8a56d33ea232dac10cb0441b4f6d533ec5b7ed80a27a5ade1f898b1a80fd570599bf4d47b10ecd60
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Filesize
72KB
MD55d9b5f41943bf3ae7f7a98c388ee285c
SHA1f1ea2c250e2dfff22c487ca41491ad9b89ecd64d
SHA25642db6416458cb6cc4111287f7e8e26926766f3631227d22a4dcdc5cf116e8e18
SHA51257ec57c2967c61b98007f71f3cfc56091bdaf216bdd3c324dbb6ba65de887247d8d5c15cf2a39ae83673f06b32fada2a3487aa894a5e06cfddb3f12e44d474f2
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25