14791264a3918650fcb150c11e59e308dc1131eb08cbbdfcfcca49ac5657a646

General

Target

2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe
Size

7.3MB
MD5

46a27c782b09f4a602730e8b1cad3627
SHA1

10b7660cccc7e4a3fe105fb9b1cad49732834a0b
SHA256

14791264a3918650fcb150c11e59e308dc1131eb08cbbdfcfcca49ac5657a646
SHA512

6502834a98d045c548e43cc30c78e4375e0aeaddd47706f172ddea4e06c6757e204500e7f992863e62036df55cb27f3427e5d66e30d7e19ce275506c7bce931a
SSDEEP

196608:onG45fkN4b7cqKg4LK8VJFgDx8vfFe9WI+eAMrk1h:t4RkN4bAqtGtFYx6fU9WNe1g1h

Score

9^/10

Malware Config

Signatures

Detects executables containing URLs to raw contents of a Github gist 2 IoCs

resource	yara_rule
behavioral1/files/0x00090000000122be-1.dat	INDICATOR_SUSPICIOUS_EXE_RawGitHub_URL
behavioral1/memory/2072-17-0x0000000000210000-0x0000000000956000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_RawGitHub_URL

Executes dropped EXE 2 IoCs

pid	Process
2072	or3FvqCtFdp5bB7.exe
2908	CTS.exe

Loads dropped DLL 2 IoCs

pid	Process
2900	2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe
2900	2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-03_46a27c782b09f4a602730e8b1cad3627_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_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2900	2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe
Token: SeDebugPrivilege	2908	CTS.exe
Token: SeDebugPrivilege	2072	or3FvqCtFdp5bB7.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2900 wrote to memory of 2072	2900	2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe	28
PID 2900 wrote to memory of 2072	2900	2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe	28
PID 2900 wrote to memory of 2072	2900	2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe	28
PID 2900 wrote to memory of 2072	2900	2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe	28
PID 2900 wrote to memory of 2908	2900	2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe	29
PID 2900 wrote to memory of 2908	2900	2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe	29
PID 2900 wrote to memory of 2908	2900	2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe	29
PID 2900 wrote to memory of 2908	2900	2024-05-03_46a27c782b09f4a602730e8b1cad3627_bkransomware.exe	29

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⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2900
- C:\Users\Admin\AppData\Local\Temp\or3FvqCtFdp5bB7.exe
  C:\Users\Admin\AppData\Local\Temp\or3FvqCtFdp5bB7.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2072
- 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:2908

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\config\chocolatey.config.backup

Filesize
809B

MD5
8b6737800745d3b99886d013b3392ac3

SHA1
bb94da3f294922d9e8d31879f2d145586a182e19

SHA256
86f10504ca147d13a157944f926141fe164a89fa8a71847458bda7102abb6594

SHA512
654dda9b645b4900ac6e5bb226494921194dab7de71d75806f645d9b94ed820055914073ef9a5407e468089c0b2ee4d021f03c2ea61e73889b553895e79713df

Download Submit
C:\Users\Admin\AppData\Local\Temp\logs\chocolatey.log

Filesize
4KB

MD5
64db93bfd1c0bdecc50736c8cbf94071

SHA1
856436a74074a7d75f31b01ec7dbf67745c880d3

SHA256
00456cfbed4cca1ea5ee210287cc7cd277882b84b607f7d49d2c76083b7c2bdb

SHA512
73b979292d4bb55530978859f5a838c8bda6da63699a9b0c71f42aede8a2eeaeee7949dcbaaafb36d42231df89d42087b7504bfe64d6b9b2172fe135484d9759

Download Submit
C:\Users\Admin\AppData\Local\Temp\redirects\cpush.exe.ignore

Filesize
2B

MD5
81051bcc2cf1bedf378224b0a93e2877

SHA1
ba8ab5a0280b953aa97435ff8946cbcbb2755a27

SHA256
7eb70257593da06f682a3ddda54a9d260d4fc514f645237f5ca74b08f8da61a6

SHA512
1b302a2f1e624a5fb5ad94ddc4e5f8bfd74d26fa37512d0e5face303d8c40eee0d0ffa3649f5da43f439914d128166cb6c4774a7caa3b174d7535451eb697b5d

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
\Users\Admin\AppData\Local\Temp\or3FvqCtFdp5bB7.exe

Filesize
7.3MB

MD5
dd6b75a77601d62ac66df1b0a51a7de3

SHA1
699fc35deccb0cd6e341420903fc993535c2c98f

SHA256
2f46a1d48e1589e0aa10f215e77cb48fb90c531e19aa3c05d766f59b449f3c15

SHA512
43bd57e5379c22494aade734a45a443722327d48c7f06aa521048c99adba576e29bd70bba7bd28ba94f8f24f88efed7b8e5a1b3249cbfcb4d95fd0bc1f424d86

Download Submit
memory/2072-16-0x000007FEF5F43000-0x000007FEF5F44000-memory.dmp

Filesize
4KB

Download
memory/2072-17-0x0000000000210000-0x0000000000956000-memory.dmp

Filesize
7.3MB

Download
memory/2072-18-0x000007FEF5F40000-0x000007FEF692C000-memory.dmp

Filesize
9.9MB

Download
memory/2072-26-0x000000001BE30000-0x000000001C112000-memory.dmp

Filesize
2.9MB

Download
memory/2072-152-0x000007FEF5F40000-0x000007FEF692C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads