6815e4dbb1e1e98566e408d220b773a61821f086a39413002f65eeab59fe334f

Analysis

max time kernel
120s
max time network
120s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
03-05-2024 14:47

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General

Target

2024-05-03_076f51994812baf3ad4e5ee614efcd61_bkransomware.exe
Size

214KB
MD5

076f51994812baf3ad4e5ee614efcd61
SHA1

5c5835f86287c4a3cdedeb871d5a44a80448caef
SHA256

6815e4dbb1e1e98566e408d220b773a61821f086a39413002f65eeab59fe334f
SHA512

b61274a87da6dc60bbc48568e2b00a42b515ee5931c9c4d7dee810a219be5ba182c0cbe19c8df92f469417597e43aef09f1a9ceb8b24a07b0eb93877e06b0355
SSDEEP

6144:xZ8az6XMnCvvYzJvrLUY0EHMi9uC7xrx8+7uaVz9:xC0VnCcVHP1uC7A+7uyz9

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2352	FmaBro9LV1Lrml6.exe
2252	CTS.exe

Loads dropped DLL 1 IoCs

pid	Process
2244	2024-05-03_076f51994812baf3ad4e5ee614efcd61_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_076f51994812baf3ad4e5ee614efcd61_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_076f51994812baf3ad4e5ee614efcd61_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2244	2024-05-03_076f51994812baf3ad4e5ee614efcd61_bkransomware.exe
Token: SeDebugPrivilege	2252	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2244 wrote to memory of 2352	2244	2024-05-03_076f51994812baf3ad4e5ee614efcd61_bkransomware.exe	28
PID 2244 wrote to memory of 2352	2244	2024-05-03_076f51994812baf3ad4e5ee614efcd61_bkransomware.exe	28
PID 2244 wrote to memory of 2352	2244	2024-05-03_076f51994812baf3ad4e5ee614efcd61_bkransomware.exe	28
PID 2244 wrote to memory of 2352	2244	2024-05-03_076f51994812baf3ad4e5ee614efcd61_bkransomware.exe	28
PID 2244 wrote to memory of 2252	2244	2024-05-03_076f51994812baf3ad4e5ee614efcd61_bkransomware.exe	30
PID 2244 wrote to memory of 2252	2244	2024-05-03_076f51994812baf3ad4e5ee614efcd61_bkransomware.exe	30
PID 2244 wrote to memory of 2252	2244	2024-05-03_076f51994812baf3ad4e5ee614efcd61_bkransomware.exe	30
PID 2244 wrote to memory of 2252	2244	2024-05-03_076f51994812baf3ad4e5ee614efcd61_bkransomware.exe	30

C:\Users\Admin\AppData\Local\Temp\2024-05-03_076f51994812baf3ad4e5ee614efcd61_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_076f51994812baf3ad4e5ee614efcd61_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:2244
- C:\Users\Admin\AppData\Local\Temp\FmaBro9LV1Lrml6.exe
  C:\Users\Admin\AppData\Local\Temp\FmaBro9LV1Lrml6.exe
  2⤵
  - Executes dropped EXE
  PID:2352
- 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:2252

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
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit
\Users\Admin\AppData\Local\Temp\FmaBro9LV1Lrml6.exe

Filesize
143KB

MD5
c1d5e48111f4984433e6318466ee1bce

SHA1
d3379a99f504b38794f491e4fff6c77cfab53eac

SHA256
dfdf187874d7368a92bbebb68c8cdc5c183af47d954b5b27ddaeca6774ae4822

SHA512
dfce97a9dc92521c2d576b3d21071cb04df4a6d927676a2b95abc0093b67a044aab8d3f8612a4a70f9128cf2555d3a554a1c3f941647a64d30298ab28bba7441

Download Submit
memory/2352-12-0x000007FEF5253000-0x000007FEF5254000-memory.dmp

Filesize
4KB

Download
memory/2352-13-0x0000000000F50000-0x0000000000F78000-memory.dmp

Filesize
160KB

Download
memory/2352-17-0x000007FEF5250000-0x000007FEF5C3C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads