84dc692794f9751a6893a73b8d68c38688cf682f98b1bcac34b3252fe72f3903

General

Target
2024-06-12_2086affdefd416dad6536567348f6a5b_bkransomware.exe
Size 918KB
Sample240612-1xdjbsscmd
SHA256 84dc692794f9751a6893a73b8d68c38688cf682f98b1bcac34b3252fe72f3903
MD5 2086affdefd416dad6536567348f6a5b
SHA1 2dceb40f8ac15c8ed689578ef9cd252dfef68a62
SHA512 b2fdf87005b0054a9665a5350b90946dcb2162a5dd42fa86ed5c063e4b7a6a1b3f9b4c8d3f84e0ce195a1a0b0af19a401f759ef86920efe4f9d022429054c7aa
SSDEEP 24576:D3dl/JPazQQZD/fkacCHiHsZvaDI2C0y8LfDyZ3NTNcxwbEiMN:DT/pb9QiHstaDRBy87DSlwiA
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 3 IoCs

pid	Process
3124	8TIIRSLA5gwIhGR.exe
2992	CTS.exe
2944	8TIIRSLA5gwIhGR.exe

Loads dropped DLL 1 IoCs

pid	Process
2944	8TIIRSLA5gwIhGR.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"	2024-06-12_2086affdefd416dad6536567348f6a5b_bkransomware.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.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

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-06-12_2086affdefd416dad6536567348f6a5b_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1572	2024-06-12_2086affdefd416dad6536567348f6a5b_bkransomware.exe
Token: SeDebugPrivilege	2992	CTS.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1572 wrote to memory of 3124	1572	2024-06-12_2086affdefd416dad6536567348f6a5b_bkransomware.exe	82
PID 1572 wrote to memory of 3124	1572	2024-06-12_2086affdefd416dad6536567348f6a5b_bkransomware.exe	82
PID 1572 wrote to memory of 3124	1572	2024-06-12_2086affdefd416dad6536567348f6a5b_bkransomware.exe	82
PID 1572 wrote to memory of 2992	1572	2024-06-12_2086affdefd416dad6536567348f6a5b_bkransomware.exe	83
PID 1572 wrote to memory of 2992	1572	2024-06-12_2086affdefd416dad6536567348f6a5b_bkransomware.exe	83
PID 1572 wrote to memory of 2992	1572	2024-06-12_2086affdefd416dad6536567348f6a5b_bkransomware.exe	83
PID 3124 wrote to memory of 2944	3124	8TIIRSLA5gwIhGR.exe	84
PID 3124 wrote to memory of 2944	3124	8TIIRSLA5gwIhGR.exe	84
PID 3124 wrote to memory of 2944	3124	8TIIRSLA5gwIhGR.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-06-12_2086affdefd416dad6536567348f6a5b_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-12_2086affdefd416dad6536567348f6a5b_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1572
- C:\Users\Admin\AppData\Local\Temp\8TIIRSLA5gwIhGR.exe
  C:\Users\Admin\AppData\Local\Temp\8TIIRSLA5gwIhGR.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:3124
- - C:\Windows\Temp\{0B074CB6-CCA4-44D9-8215-FA80AB6BC76D}\.cr\8TIIRSLA5gwIhGR.exe
    "C:\Windows\Temp\{0B074CB6-CCA4-44D9-8215-FA80AB6BC76D}\.cr\8TIIRSLA5gwIhGR.exe" -burn.clean.room="C:\Users\Admin\AppData\Local\Temp\8TIIRSLA5gwIhGR.exe" -burn.filehandle.attached=544 -burn.filehandle.self=548
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    PID:2944
- 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:2992

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

excel.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Size 394KB
SHA256 0d0c81466c571deba1223a106a19d40b0e6d5e1dc64d9384510feaae2ba4fda2
MD5 7204863dc2a7d7ae29b187cbc00c1d3c
SHA1 34e2aa3fb41dda082e44f475b9e850e4da9b2664
SHA512 28a11f94eed719ca37d71d093b34a7ea49fc4f39992faa925d263e9ca3cc7f8e2c3d3c9db8d87f848dbbab907ede7aef92cedeec508c421fec1e0faab7a1f967
SSDEEP 6144:hZMazDdfASkSu0zr5qxVxsLVlSrHQpRDqU4JsWrURkfi8NV6S1jjY:hS0hfASi0zNqnayrfJsaUCfl+sjs
MD5 SHA1 SHA512 SSDEEP

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8TIIRSLA5gwIhGR.exe

Path C:\Users\Admin\AppData\Local\Temp\8TIIRSLA5gwIhGR.exe
Size 847KB
SHA256 550962c4268923bf764797577346b6922493b925b8d17565186bf4b74295193c
MD5 29bf0d271cc659ddd598c564e3e9adb5
SHA1 7f21ce21bc79ca6df7a27b0090cdb75be75302d3
SHA512 db2a9874aebf6ed6026ee4e8cde71d124706dc269e072d9cbdd715429e4decb84413289eed3f0fbc2ba80a2a25e4f0376dc08f30e1cd566c1974bc84a1535823
SSDEEP 12288:SAjuakTOfDlEU4HWDblFlOTPThNwGEJCQMqWETsuoJGqIlEeAGVu:ru/OfDlEUKWflmTP3wGICRn3/GzPAqu
MD5 SHA1 SHA512 SSDEEP

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CTS.exe

Path C:\Windows\CTS.exe
Size 71KB
SHA256 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
MD5 66df4ffab62e674af2e75b163563fc0b
SHA1 dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA512 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT:ZhpAyazIlyazT
MD5 SHA1 SHA512 SSDEEP

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PythonBA.dll

Path C:\Windows\Temp\{9F2CDB42-71A3-4DF9-830B-EEE6A13C7572}\.ba\PythonBA.dll
Size 650KB
SHA256 560739d8eb7d23641260ac5950e8693d376b1714b6ae1e202e74e7e2216ff961
MD5 67c295f6b2a53365885879907f4aca36
SHA1 0c8e4f9e5af43f0f4c9f42b23c9c19a33011c29a
SHA512 e8eccf168976a86d5a2bd4be4bb05bd8971afa1f2b3fcd460aac7eda431da0b021b96db71be270be433aa4b2347003dc9e69c43a67c0a7422c8b9a21068a8bb9
SSDEEP 6144:khu8je1UEVeUW0WZwkgqhZaR4ws4H5g0Tov0fq+Uu5nqBIDY:khuC9seU3BqhZaR4wsc5gAY
MD5 SHA1 SHA512 SSDEEP

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SideBar.png

Path C:\Windows\Temp\{9F2CDB42-71A3-4DF9-830B-EEE6A13C7572}\.ba\SideBar.png
Size 50KB
SHA256 79434bd1368f47f08acf6db66638531d386bf15166d78d9bfea4da164c079067
MD5 888eb713a0095756252058c9727e088a
SHA1 c14f69f2bef6bc3e2162b4dd78e9df702d94cdb4
SHA512 7c59f4ada242b19c2299b6789a65a1f34565fed78730c22c904db16a9872fe6a07035c6d46a64ee94501fbcd96de586a8a5303ca22f33da357d455c014820ca0
SSDEEP 1536:/c/aRsg1fYfJt0Bg74nWPMMCNBaeQzxxj8ckBo:UcsgGfP0yCWTAaeyxxjGBo
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads