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Analysis
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max time kernel
133s -
max time network
102s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
03/05/2024, 17:53
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe
Resource
win10v2004-20240419-en
General
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Target
2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe
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Size
7.3MB
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MD5
46a27c782b09f4a602730e8b1cad3627
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SHA1
10b7660cccc7e4a3fe105fb9b1cad49732834a0b
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SHA256
14791264a3918650fcb150c11e59e308dc1131eb08cbbdfcfcca49ac5657a646
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SHA512
6502834a98d045c548e43cc30c78e4375e0aeaddd47706f172ddea4e06c6757e204500e7f992863e62036df55cb27f3427e5d66e30d7e19ce275506c7bce931a
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SSDEEP
196608:onG45fkN4b7cqKg4LK8VJFgDx8vfFe9WI+eAMrk1h:t4RkN4bAqtGtFYx6fU9WNe1g1h
Malware Config
Signatures
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Detects executables containing URLs to raw contents of a Github gist 2 IoCs
resource yara_rule behavioral2/files/0x000f000000023b8e-3.dat INDICATOR_SUSPICIOUS_EXE_RawGitHub_URL behavioral2/memory/4772-17-0x0000000000DB0000-0x00000000014F6000-memory.dmp INDICATOR_SUSPICIOUS_EXE_RawGitHub_URL -
Executes dropped EXE 2 IoCs
pid Process 4772 22hwOfQQpJqgtkg.exe 536 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" CTS.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe -
Drops file in Windows directory 2 IoCs
description ioc Process File created C:\Windows\CTS.exe 2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeDebugPrivilege 2768 2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe Token: SeDebugPrivilege 536 CTS.exe Token: SeDebugPrivilege 4772 22hwOfQQpJqgtkg.exe -
Suspicious use of WriteProcessMemory 5 IoCs
description pid Process procid_target PID 2768 wrote to memory of 4772 2768 2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe 85 PID 2768 wrote to memory of 4772 2768 2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe 85 PID 2768 wrote to memory of 536 2768 2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe 87 PID 2768 wrote to memory of 536 2768 2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe 87 PID 2768 wrote to memory of 536 2768 2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe 87
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2768 -
C:\Users\Admin\AppData\Local\Temp\22hwOfQQpJqgtkg.exeC:\Users\Admin\AppData\Local\Temp\22hwOfQQpJqgtkg.exe2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4772
-
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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:536
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
392KB
MD569e900d8c41387dfa346ab8527d2a3f9
SHA17904cfd14d662147adb4841deea4a43b70e2b140
SHA25604a51bdf2c9d9287d7c7737fea34f8ff80018e448c89167b1057924e1c3243ea
SHA512873894e55af8897cba3168be2d4afc53292fed8c0d29d266409a9f74e66ee592f63589ab67bee7e464fd7d3c58f5d0858e3495c52ade6a9609e7aa21822c74c8
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Filesize
7.3MB
MD5dd6b75a77601d62ac66df1b0a51a7de3
SHA1699fc35deccb0cd6e341420903fc993535c2c98f
SHA2562f46a1d48e1589e0aa10f215e77cb48fb90c531e19aa3c05d766f59b449f3c15
SHA51243bd57e5379c22494aade734a45a443722327d48c7f06aa521048c99adba576e29bd70bba7bd28ba94f8f24f88efed7b8e5a1b3249cbfcb4d95fd0bc1f424d86
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Filesize
9KB
MD514ffcf07375b3952bd3f2fe52bb63c14
SHA1ab2eadde4c614eb8f1f2cae09d989c5746796166
SHA2566ccfdb5979e715d12e597b47e1d56db94cf6d3a105b94c6e5f4dd8bab28ef5ed
SHA51214a32151f7f7c45971b4c1adfb61f6af5136b1db93b50d00c6e1e3171e25b19749817b4e916d023ee1822caee64961911103087ca516cf6a0eafce1d17641fc4
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Filesize
809B
MD58b6737800745d3b99886d013b3392ac3
SHA1bb94da3f294922d9e8d31879f2d145586a182e19
SHA25686f10504ca147d13a157944f926141fe164a89fa8a71847458bda7102abb6594
SHA512654dda9b645b4900ac6e5bb226494921194dab7de71d75806f645d9b94ed820055914073ef9a5407e468089c0b2ee4d021f03c2ea61e73889b553895e79713df
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Filesize
805B
MD5e3d6201ac9da655f64f90b9e52f33289
SHA16f4b83e3f6eda4051a3d3c9b08cfaadd3352bb90
SHA256e99eac83e31323f9b1a6208ead6fcb0ed41b748d378db53321fe5ee5c8697980
SHA512cd319b45eb1a189709f51c535fed25fa517b01d2fe504e581365bc05dfb8fb52edc3c659d9919438dacbcf0507ea686405c45c5a5444933628e7317b336c7c1f
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Filesize
2KB
MD574adaf1a2b64448b8ecb649d22455db3
SHA16da8fe8a469526c47391289d513fea86dfee3d4f
SHA25606e2a29b6a5c1d8467c3e2df308f4792d639ab3d4abfc6d4242100a0ed9d963a
SHA512abd9c091fd32ec7f928b82e8bc2caef0972d737134509f9c9cadbfc268fdf6e06925ac01e26f2d39ac77571034ac25fe1e15a4c67c51420147cbe2b147e2c520
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Filesize
4KB
MD5a71c264f75e4a470eef28d8d562ebd4b
SHA1fc71dfaaecfb20afeabb9ae170b4334d07696350
SHA2569cd497910e7133139ef889fb65e977b1935a65181044e13430277b47d878b613
SHA5128b21a1dcea9fb3a1571da3cea15aed311670c4f919a0b28c4145b79f742122bc3177b382f1d6c5e78424e209f50a870ed657c098cfd9368d6f01e7790dff7c3a
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Filesize
2B
MD581051bcc2cf1bedf378224b0a93e2877
SHA1ba8ab5a0280b953aa97435ff8946cbcbb2755a27
SHA2567eb70257593da06f682a3ddda54a9d260d4fc514f645237f5ca74b08f8da61a6
SHA5121b302a2f1e624a5fb5ad94ddc4e5f8bfd74d26fa37512d0e5face303d8c40eee0d0ffa3649f5da43f439914d128166cb6c4774a7caa3b174d7535451eb697b5d
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25