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Analysis
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max time kernel
93s -
max time network
95s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
03/05/2024, 10:28
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-03_905f2311a180ec3bce2aa7e517c2c671_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-03_905f2311a180ec3bce2aa7e517c2c671_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-03_905f2311a180ec3bce2aa7e517c2c671_bkransomware.exe
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Size
135KB
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MD5
905f2311a180ec3bce2aa7e517c2c671
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SHA1
48d8ea911d0fc45143df8efc2b0c17e72bab3d17
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SHA256
237cd66950f0ea22643de353894a495688ba574355a8156f9fc5ed3a26e5e6c1
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SHA512
2cfe78d9af5e31117077c586d398f2fe01d1c69a30adcc5d62c052dcff6599c8f8dae3b226a146f6f175a276ffd4d29ef640daecbc5cad79f41749ab375ea7b2
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SSDEEP
3072:ZhpAyazIlyazTL5L/2eKFhhH47GCzp0uqUOPF:hZMaz1TePnCzKJPF
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
pid Process 5004 Fi2K9GlprHERtLm.exe 856 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" 2024-05-03_905f2311a180ec3bce2aa7e517c2c671_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 2024-05-03_905f2311a180ec3bce2aa7e517c2c671_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 4388 2024-05-03_905f2311a180ec3bce2aa7e517c2c671_bkransomware.exe Token: SeDebugPrivilege 856 CTS.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 4388 wrote to memory of 5004 4388 2024-05-03_905f2311a180ec3bce2aa7e517c2c671_bkransomware.exe 81 PID 4388 wrote to memory of 5004 4388 2024-05-03_905f2311a180ec3bce2aa7e517c2c671_bkransomware.exe 81 PID 4388 wrote to memory of 5004 4388 2024-05-03_905f2311a180ec3bce2aa7e517c2c671_bkransomware.exe 81 PID 4388 wrote to memory of 856 4388 2024-05-03_905f2311a180ec3bce2aa7e517c2c671_bkransomware.exe 82 PID 4388 wrote to memory of 856 4388 2024-05-03_905f2311a180ec3bce2aa7e517c2c671_bkransomware.exe 82 PID 4388 wrote to memory of 856 4388 2024-05-03_905f2311a180ec3bce2aa7e517c2c671_bkransomware.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-03_905f2311a180ec3bce2aa7e517c2c671_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-03_905f2311a180ec3bce2aa7e517c2c671_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4388 -
C:\Users\Admin\AppData\Local\Temp\Fi2K9GlprHERtLm.exeC:\Users\Admin\AppData\Local\Temp\Fi2K9GlprHERtLm.exe2⤵
- Executes dropped EXE
PID:5004
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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:856
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
392KB
MD5696c735b822b2caec4e9e4b4389a64ba
SHA1b03c443cca9d14320ece255c71751ac5c61d83e0
SHA256a5f94b9443f76983914c843da5ecd3377f79ed75e4410d17f04d36d9b4229878
SHA512d81439814db951b444fffc7e23e84f1ae0a76b5e3f19b6ead4c15909e7f74f90043720d6d1d6718415766468db4532e0a6d74bcd9503480dfd82bba2d0815296
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Filesize
64KB
MD5a32a382b8a5a906e03a83b4f3e5b7a9b
SHA111e2bdd0798761f93cce363329996af6c17ed796
SHA25675f12ea2f30d9c0d872dade345f30f562e6d93847b6a509ba53beec6d0b2c346
SHA512ec87dd957be21b135212454646dcabdd7ef9442cf714e2c1f6b42b81f0c3fa3b1875bde9a8b538e8a0aa2190225649c29e9ed0f25176e7659e55e422dd4efe4c
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25