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Analysis
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max time kernel
137s -
max time network
170s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
28/06/2024, 22:27
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-28_ca67324f74fd9598267e995779dacf28_bkransomware.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-06-28_ca67324f74fd9598267e995779dacf28_bkransomware.exe
Resource
win10v2004-20240226-en
General
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Target
2024-06-28_ca67324f74fd9598267e995779dacf28_bkransomware.exe
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Size
71KB
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MD5
ca67324f74fd9598267e995779dacf28
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SHA1
0d2a8aad15de4ad9348d600b0f5587beabf6edee
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SHA256
824b105f9759660673334a4972aafa5c1da141972cebbb2eba1d543737a984c3
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SHA512
a0d72fec04254b577e322c4d6c0ea2bc22452270d24bfd104052387f7007de827046d660e25d9e47e761e49954fc60c6cc1dc6e6cc844ad0306aa26932995a34
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT0:ZhpAyazIlyazT0
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 3300 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" 2024-06-28_ca67324f74fd9598267e995779dacf28_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 2024-06-28_ca67324f74fd9598267e995779dacf28_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 5076 2024-06-28_ca67324f74fd9598267e995779dacf28_bkransomware.exe Token: SeDebugPrivilege 3300 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 5076 wrote to memory of 3300 5076 2024-06-28_ca67324f74fd9598267e995779dacf28_bkransomware.exe 91 PID 5076 wrote to memory of 3300 5076 2024-06-28_ca67324f74fd9598267e995779dacf28_bkransomware.exe 91 PID 5076 wrote to memory of 3300 5076 2024-06-28_ca67324f74fd9598267e995779dacf28_bkransomware.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-28_ca67324f74fd9598267e995779dacf28_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-28_ca67324f74fd9598267e995779dacf28_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5076 -
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:3300
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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=4340 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:81⤵PID:1556
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
789KB
MD5ac0c58689787f1c379dbde58dd0a51de
SHA1ec0a3e469977d7e469a800313bbe67aa94362617
SHA256bf11d351fe85585fe664bdeecda86e2a96e5a5b28ca45e9a65a13dd80e25de5e
SHA512825d516bb09bf26de6886ecb58c16baa375dea1174b62aab902bf3050835aecd878dc5e5dd56763abbbdd702e669fb3e12bc5abe35d7ca7d624829734092d791
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Filesize
71KB
MD5a0dd5632be16e73c6343378dab77e6cb
SHA1c9de63c132cd253efe45fcb6ae7265adb4275d23
SHA2562719d6179666a4b1c077d873e18c9e05ed9dcef726a5cb3281fd2277f6b8bac3
SHA512b2fbb55929a9bde596ee3d2f4b96e79f767c7ce5eef461206d353a59bd72fdd575660e98483e0a402a5c5667339bf67762f38b2261e1b287b50cdfdabc3ba7a2
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25