Analysis
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max time kernel
125s -
max time network
127s -
platform
windows10-2004_x64 -
resource
win10v2004-20240611-en -
resource tags
arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system -
submitted
13-06-2024 04:25
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe
Resource
win10v2004-20240611-en
General
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Target
2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe
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Size
71KB
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MD5
3a5b1baa996b35b243dd161b3e4b292a
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SHA1
998fc1e4f533139fa5a4205305c99b58e2aaab15
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SHA256
b732cd56ad5917c6e082eb84073c11575c1b4db0560d5257a204112d081c7bae
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SHA512
6148ae456f6faa526e76ff00ff61514ee831e060890fc3a70dd59be23ddbe4f02204dc2e0cc30e2d993208e0a870b9a1431c5bc836ad30a3d0a8019d9ff1a429
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTC:ZhpAyazIlyazTC
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 3184 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:
CTS.exe2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" CTS.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe -
Drops file in Windows directory 2 IoCs
Processes:
2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 3100 2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe Token: SeDebugPrivilege 3184 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exedescription pid process target process PID 3100 wrote to memory of 3184 3100 2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe CTS.exe PID 3100 wrote to memory of 3184 3100 2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe CTS.exe PID 3100 wrote to memory of 3184 3100 2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3100 -
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:3184
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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 --field-trial-handle=4184,i,11751898164297348119,13021661521765644467,262144 --variations-seed-version --mojo-platform-channel-handle=3928 /prefetch:81⤵PID:5040
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
392KB
MD5f65e522a3861b2fafee1fce8fbfa9189
SHA1a9261c3a222863d713b4975e1599b6fdcc4dc0da
SHA2568df62214fb2962d81689b72154dc7d9d6f43ed2b06755857904fed0df4c53b43
SHA5121c9454140882a4eccec2bcc400b256f1e164613dbf8b4d10e413c37a30cc6a804d8bc71c1646a48a88e2605fda4315dda27f753dd7abcb31da7a0f4f27bc4fc6
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Filesize
71KB
MD526ef93be0287b6a63277afb2b6bd56ac
SHA119f4997052ab68f245e31d570571ee4f00e32f65
SHA2563895687c754f7b6f702128f26ca5e2e604d9ad1a3d1b18147f6b74d858fe14da
SHA5121a969c92704fa26016ccb806848393720ee6cab9b67f5efac244599ada94be42e1658f2c313644f3e845e9eda040444d8dfa0925eb607b830622c352f25754e4
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25