9a9bab18e4d0a5f51e665986d6c8898d83584a3e421e69fce77367ca9b036897

Analysis

max time kernel
120s
max time network
122s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
03/05/2024, 05:30

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General

Target

2024-05-03_32e7aa840e8697448c656bacfd0d7cf2_bkransomware.exe
Size

174KB
MD5

32e7aa840e8697448c656bacfd0d7cf2
SHA1

354cd72be975f476e191205a1e35ae2e6c421b7f
SHA256

9a9bab18e4d0a5f51e665986d6c8898d83584a3e421e69fce77367ca9b036897
SHA512

b4dabf28de00acdfd00c993c197971a4226403f1ddd0ecb1dfca2f446fed0bc3cabe2fdf1c25dcebd30b818bb9ebc45281bb9312b3de30016a4b2790e0a6337f
SSDEEP

3072:ZhpAyazIlyazTRtNFKKxe6n++1CWm+bQWmN0Ffx9LET0LCJ:hZMazdvYKVCWm+bA8fPFuJ

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2872	CTS.exe
2784	ThfVfYtPMRCR6Z6.exe

Loads dropped DLL 2 IoCs

pid	Process
2280	2024-05-03_32e7aa840e8697448c656bacfd0d7cf2_bkransomware.exe
2968	Process not Found

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_32e7aa840e8697448c656bacfd0d7cf2_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_32e7aa840e8697448c656bacfd0d7cf2_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2280	2024-05-03_32e7aa840e8697448c656bacfd0d7cf2_bkransomware.exe
Token: SeDebugPrivilege	2872	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 2784	2280	2024-05-03_32e7aa840e8697448c656bacfd0d7cf2_bkransomware.exe	28
PID 2280 wrote to memory of 2784	2280	2024-05-03_32e7aa840e8697448c656bacfd0d7cf2_bkransomware.exe	28
PID 2280 wrote to memory of 2784	2280	2024-05-03_32e7aa840e8697448c656bacfd0d7cf2_bkransomware.exe	28
PID 2280 wrote to memory of 2784	2280	2024-05-03_32e7aa840e8697448c656bacfd0d7cf2_bkransomware.exe	28
PID 2280 wrote to memory of 2872	2280	2024-05-03_32e7aa840e8697448c656bacfd0d7cf2_bkransomware.exe	29
PID 2280 wrote to memory of 2872	2280	2024-05-03_32e7aa840e8697448c656bacfd0d7cf2_bkransomware.exe	29
PID 2280 wrote to memory of 2872	2280	2024-05-03_32e7aa840e8697448c656bacfd0d7cf2_bkransomware.exe	29
PID 2280 wrote to memory of 2872	2280	2024-05-03_32e7aa840e8697448c656bacfd0d7cf2_bkransomware.exe	29

C:\Users\Admin\AppData\Local\Temp\2024-05-03_32e7aa840e8697448c656bacfd0d7cf2_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_32e7aa840e8697448c656bacfd0d7cf2_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:2280
- C:\Users\Admin\AppData\Local\Temp\ThfVfYtPMRCR6Z6.exe
  C:\Users\Admin\AppData\Local\Temp\ThfVfYtPMRCR6Z6.exe
  2⤵
  - Executes dropped EXE
  PID:2784
- 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:2872

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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\Users\Admin\AppData\Local\Temp\ThfVfYtPMRCR6Z6.exe

Filesize
103KB

MD5
6e5a78d1702531b72ef60b5fae57a752

SHA1
0ce7e1172989a55d9cc07e204af0b00b22d2ea7c

SHA256
a00a877acefcad45953343ad56a22152f7aaba5fcf2a10215d84169d47fbcd1d

SHA512
23b3094d77f876b6ff9286aea1f5e61bb6909f2b66abda02be21862956712fc33ed241a0d40d0f30aa52eecb240b139468606cffa4e11ee87b6b27bd05d8f0a3

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads