146d4827f8cffd5d6b457854436f8196287c8c48939bea3e114e15861d21b914

Analysis

max time kernel
147s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 10:03

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General

Target

2024-04-28_45e353f00be235928c659da55055c083_bkransomware.exe
Size

71KB
MD5

45e353f00be235928c659da55055c083
SHA1

433f5e6e7753dc75a89cc938d1ef46648300504d
SHA256

146d4827f8cffd5d6b457854436f8196287c8c48939bea3e114e15861d21b914
SHA512

bec87d4a68e072130fc4512738b5f950453c38fa1b8a5e9bfe3920403ab7853b9f476523d2b516bd5098de59bf5972e2d426a3582b9c9ad0e0d247ed87b3ed39
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTt:ZRpAyazIliazTt

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

3316 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

pid	process
3316	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

CTS.exe2024-04-28_45e353f00be235928c659da55055c083_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"	2024-04-28_45e353f00be235928c659da55055c083_bkransomware.exe

Drops file in Windows directory 2 IoCs

Processes:

2024-04-28_45e353f00be235928c659da55055c083_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_45e353f00be235928c659da55055c083_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_45e353f00be235928c659da55055c083_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2328 2024-04-28_45e353f00be235928c659da55055c083_bkransomware.exe
Token: SeDebugPrivilege 3316 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_45e353f00be235928c659da55055c083_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2328	2024-04-28_45e353f00be235928c659da55055c083_bkransomware.exe
Token: SeDebugPrivilege	3316	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_45e353f00be235928c659da55055c083_bkransomware.exe

description	pid	process	target process
PID 2328 wrote to memory of 3316	2328	2024-04-28_45e353f00be235928c659da55055c083_bkransomware.exe	CTS.exe
PID 2328 wrote to memory of 3316	2328	2024-04-28_45e353f00be235928c659da55055c083_bkransomware.exe	CTS.exe
PID 2328 wrote to memory of 3316	2328	2024-04-28_45e353f00be235928c659da55055c083_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_45e353f00be235928c659da55055c083_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_45e353f00be235928c659da55055c083_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2328

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:3316

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

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

MD5
643525b84abcd82e7252291f7e681bc4

SHA1
880ae20842ad9fd31b8fc894d477bf7f0fa6dc47

SHA256
26d7d402a20cfd17398ba6de4c16f8165f6b2e3e2b9a6620d20942b758d474ac

SHA512
2bb3036882f5142ed0eb5d6221647f5ad2acf4056adaec90f1ddc0a3df6cd4536a08ca028d3dbd564da7c6582ebc063ed4b8540953f48eb6d6e301e6324ebe92

Download Submit
C:\Users\Admin\AppData\Local\Temp\MrNUDqcd3zxj0V7.exe
Filesize
71KB

MD5
3a6bf09a94b4f9e437ade2cc2da39575

SHA1
22671ad5467f8eff3cb209d092afe28abbd8aec6

SHA256
6027a08155aee5896324386a6254b450157dd8ec62424463caf7d1aff3a2f0f2

SHA512
abb9e1e7366206c505df5fc9f56c5b3a7a60bd643ce2fa1e8cfe609bd7a07fbefdb683a197f36b995604166350b8cad734c24e9ddb22694a4fe73de502a1e22b

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C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit