3abd39167a931d8abe0b77d73161a4b53407f183fcd0b94ac4cf0823e398b91c

Analysis

max time kernel
66s
max time network
52s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
30/04/2024, 14:57

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General

Target

2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe
Size

71KB
MD5

bdfe14e3540a1a5ee06ffcc28dc03b0c
SHA1

2b66441e1b8993e79895f38aaf5f976047abf294
SHA256

3abd39167a931d8abe0b77d73161a4b53407f183fcd0b94ac4cf0823e398b91c
SHA512

ad58c503b7c342aa0df1224b84e275f8efbbeb0d9c09cfd87758a48b70a93f31044e44132411e9a9ef7f607456bef1382aaa3d171bbffc8c8248c8f2e61f4765
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT9:ZRpAyazIliazT9

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
872	CTS.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"	2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_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	CTS.exe
File created	C:\Windows\CTS.exe	2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4044	2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe
Token: SeDebugPrivilege	872	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4044 wrote to memory of 872	4044	2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe	87
PID 4044 wrote to memory of 872	4044	2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe	87
PID 4044 wrote to memory of 872	4044	2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4044
- 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:872

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:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

Filesize
392KB

MD5
f500ca0c6cea7064082387bdd9414f9c

SHA1
ebe02b33b2043d186dfb50873a74d0dbba6e826b

SHA256
cd35e6c9bd07a76be95186a821756e3eb3d9b3d74876287979d09e34a1e998c5

SHA512
829a8a65731d1078cd39dbe600162e54b687411b971a206e547be8c4b14a468941073f81ccb1c6770dc4651791e529d224bcb7fd95476fa2556828fdd9d04642

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C:\Users\Admin\AppData\Local\Temp\e8p2wvibtrRYNVJ.exe

Filesize
71KB

MD5
5055079ce9131547b9ea016b28b700e9

SHA1
9f1f551a14c168b2b05854cb8ddfd86e3ac2e441

SHA256
f4cc7a26764ee69404a261c0e7097178605ef9b1d1c130838c6cb852c29740a4

SHA512
2ca8f5f186d3794e98d7408e2c54325699e4d0f0623eb76702ed8ad90380145c6a304af0e478dd62fc0d694ab1cf9fda4f18be4f0fcda04d54f07a54b85a9f78

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads