Analysis
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max time kernel
94s -
max time network
147s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
03-06-2024 08:37
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe
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Size
72KB
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MD5
f262fcd17104f903e343fe739502f0d6
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SHA1
90f1aebffe5e3966a0ce94c9dc9ded1d9dcf8c61
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SHA256
620d13c4a73f2fef68c67391ab2cfa00dbe4443a673352df13cb265c2f00d5e1
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SHA512
7f6a336e3c62a59709f81e7ec39699086b514a493b1e51d00fc990459ce378e172de6bd7c98145e43a410ae963bd47ff4625ab0692aaf1fcee40c6db1658c531
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT6:ZRpAyazIliazT6
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 2484 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:
2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-03_f262fcd17104f903e343fe739502f0d6_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:
2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 1400 2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe Token: SeDebugPrivilege 2484 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exedescription pid process target process PID 1400 wrote to memory of 2484 1400 2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe CTS.exe PID 1400 wrote to memory of 2484 1400 2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe CTS.exe PID 1400 wrote to memory of 2484 1400 2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1400 -
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:2484
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
392KB
MD5870724f2d942b3676711b5bd44aeca60
SHA1d9e6559ef4dd088a376da7cca69c604643e53308
SHA256acb3ae71473c1cf5a54701dbc4eb8ea9ed8851a9321523689ab40936f64eef3d
SHA5122fe0442f9a57a6116a7768614ab0b6984dfe667fbf36c900598176c1036862e83688fd43a82a9ae2d7f9f19599e31620d5cdf00845781740938cb587439a8114
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Filesize
72KB
MD56517c0b003e7bffc76f5588efb9db530
SHA13a3114c52ff675cd0b92fc86f58775aeb0e08880
SHA256f1f5aec3383abd1e388e556d73ad5fc801b829cf7412d262fdf2664960760370
SHA512e1c3977a3e628a9ab2f51637c082eda629342c02d36ab40481ed95ba7aef9ac729ce248cc18c9b1fe5de49170771a4fbfffd3aa40f4790293114300a4e79f527
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432