7e18de9647f5bad9a5c56e796e78718ce570aa66b9b0835ad63e5558cb1e6a9a

General

Target

2024-05-23_846e60356121f3fcafd95e331689505c_bkransomware.exe
Size

13.3MB
MD5

846e60356121f3fcafd95e331689505c
SHA1

2f3dbf73aa2c681a6b4234bcd1aad339850d99fc
SHA256

7e18de9647f5bad9a5c56e796e78718ce570aa66b9b0835ad63e5558cb1e6a9a
SHA512

65e322edb9483417c90745e1fd30ec3d93419508e4cdd8b43d21275303b0f682c1e40ba30d53681be16ec74d0ff297fb6768fd61994ecc37af98272a14395b4f
SSDEEP

393216:fJMSrvzSYmaa2lCNo25azDRIk89zDmlHj9iYx7zgc+N:qSDzSYjImEa3O/xuj9NfA

Score

7^/10

discovery persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 3 IoCs

Processes:

F3bFX0t7IeLzs43.exeCTS.exeF3bFX0t7IeLzs43.exe

pid process

4484 F3bFX0t7IeLzs43.exe
3004 CTS.exe
2972 F3bFX0t7IeLzs43.exe
Loads dropped DLL 1 IoCs

Processes:

F3bFX0t7IeLzs43.exe

pid process

2972 F3bFX0t7IeLzs43.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

pid	process
4484	F3bFX0t7IeLzs43.exe
3004	CTS.exe
2972	F3bFX0t7IeLzs43.exe

pid	process
2972	F3bFX0t7IeLzs43.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

CTS.exe2024-05-23_846e60356121f3fcafd95e331689505c_bkransomware.exe

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"	2024-05-23_846e60356121f3fcafd95e331689505c_bkransomware.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Drops file in Windows directory 2 IoCs

Processes:

2024-05-23_846e60356121f3fcafd95e331689505c_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-23_846e60356121f3fcafd95e331689505c_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-23_846e60356121f3fcafd95e331689505c_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3796 2024-05-23_846e60356121f3fcafd95e331689505c_bkransomware.exe
Token: SeDebugPrivilege 3004 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-23_846e60356121f3fcafd95e331689505c_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3796	2024-05-23_846e60356121f3fcafd95e331689505c_bkransomware.exe
Token: SeDebugPrivilege	3004	CTS.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

2024-05-23_846e60356121f3fcafd95e331689505c_bkransomware.exeF3bFX0t7IeLzs43.exe

description	pid	process	target process
PID 3796 wrote to memory of 4484	3796	2024-05-23_846e60356121f3fcafd95e331689505c_bkransomware.exe	F3bFX0t7IeLzs43.exe
PID 3796 wrote to memory of 4484	3796	2024-05-23_846e60356121f3fcafd95e331689505c_bkransomware.exe	F3bFX0t7IeLzs43.exe
PID 3796 wrote to memory of 4484	3796	2024-05-23_846e60356121f3fcafd95e331689505c_bkransomware.exe	F3bFX0t7IeLzs43.exe
PID 3796 wrote to memory of 3004	3796	2024-05-23_846e60356121f3fcafd95e331689505c_bkransomware.exe	CTS.exe
PID 3796 wrote to memory of 3004	3796	2024-05-23_846e60356121f3fcafd95e331689505c_bkransomware.exe	CTS.exe
PID 3796 wrote to memory of 3004	3796	2024-05-23_846e60356121f3fcafd95e331689505c_bkransomware.exe	CTS.exe
PID 4484 wrote to memory of 2972	4484	F3bFX0t7IeLzs43.exe	F3bFX0t7IeLzs43.exe
PID 4484 wrote to memory of 2972	4484	F3bFX0t7IeLzs43.exe	F3bFX0t7IeLzs43.exe
PID 4484 wrote to memory of 2972	4484	F3bFX0t7IeLzs43.exe	F3bFX0t7IeLzs43.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_846e60356121f3fcafd95e331689505c_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_846e60356121f3fcafd95e331689505c_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3796

C:\Users\Admin\AppData\Local\Temp\F3bFX0t7IeLzs43.exe
C:\Users\Admin\AppData\Local\Temp\F3bFX0t7IeLzs43.exe
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4484

C:\Windows\Temp\{AC49E8AF-B4B0-4627-B838-3CED8D728D31}\.cr\F3bFX0t7IeLzs43.exe
"C:\Windows\Temp\{AC49E8AF-B4B0-4627-B838-3CED8D728D31}\.cr\F3bFX0t7IeLzs43.exe" -burn.clean.room="C:\Users\Admin\AppData\Local\Temp\F3bFX0t7IeLzs43.exe" -burn.filehandle.attached=540 -burn.filehandle.self=548
3⤵
- Executes dropped EXE
- Loads dropped DLL
PID:2972

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:3004

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

Query Registry

1

T1012

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
392KB

MD5
891673a0ce8463ed462826ceab7bd56a

SHA1
cd2c72400420c627764fd4ebb79c66b12e5296fd

SHA256
922f7e0a1179ae6ff3d6a7c7abcf8d6895147a9f5c5104e3a32560739c6d1a3c

SHA512
a33de8e67c1ac87214aadb14e9097a2dc802f0453c2f1540ed94521350089bfbb1b7eb973b1204c2ec9ea57e1ed96f5e566907dfc5bb77620ac304934504f49b

Download Submit
C:\Users\Admin\AppData\Local\Temp\F3bFX0t7IeLzs43.exe
Filesize
13.2MB

MD5
ca8c521c30f57c0c199d526b9a23fc4a

SHA1
663399541a7d3bb1b5ea0e57a00c024e50d8506c

SHA256
8ae59d82845159db3a70763f5cb1571e45ebf6a1adfecc47574ba17b019483a0

SHA512
28cf976fa51e4c7abb57fd8fcde6381f1e140407924ef265fde6e59546fb6fdeb803f388a5d1e9e74fb80d47ce5fd9f275aaf41258a09002fba27c2cbbc2df4d

Download Submit
C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
C:\Windows\Temp\{8855D97D-8CD2-404F-98CC-51C6814F69A9}\.ba\logo.png
Filesize
1KB

MD5
d6bd210f227442b3362493d046cea233

SHA1
ff286ac8370fc655aea0ef35e9cf0bfcb6d698de

SHA256
335a256d4779ec5dcf283d007fb56fd8211bbcaf47dcd70fe60ded6a112744ef

SHA512
464aaab9e08de610ad34b97d4076e92dc04c2cdc6669f60bfc50f0f9ce5d71c31b8943bd84cee1a04fb9ab5bbed3442bd41d9cb21a0dd170ea97c463e1ce2b5b

Download Submit
C:\Windows\Temp\{8855D97D-8CD2-404F-98CC-51C6814F69A9}\.ba\wixstdba.dll
Filesize
191KB

MD5
eab9caf4277829abdf6223ec1efa0edd

SHA1
74862ecf349a9bedd32699f2a7a4e00b4727543d

SHA256
a4efbdb2ce55788ffe92a244cb775efd475526ef5b61ad78de2bcdfaddac7041

SHA512
45b15ade68e0a90ea7300aeb6dca9bc9e347a63dba5ce72a635957564d1bdf0b1584a5e34191916498850fc7b3b7ecfbcbfcb246b39dbf59d47f66bc825c6fd2

Download Submit
C:\Windows\Temp\{AC49E8AF-B4B0-4627-B838-3CED8D728D31}\.cr\F3bFX0t7IeLzs43.exe
Filesize
634KB

MD5
2389d29f633df11642dff1bf5f21eb35

SHA1
ce85460fd7cde25528142f4cdca4e6013bb4b1e8

SHA256
ab91fbaab09a94839ba839275338ac42fe2661781d371e517f9b2e4866e2cc55

SHA512
59d607112566d13d15a8de8e18be204e8bf0d2010310ebc9c8589ceb42fb8fce7800a6e58f30ffb92d4c1b3e0d17c1a2076a478de753e5334971465c52f8eeed

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads