42efa447d805b5ab033f854624919d9b57ae8144582bf71880c2a5b4f9e91823

Analysis

max time kernel
142s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 19:30

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General

Target

2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe
Size

72KB
MD5

5d9d10899433b972058fa26c98e4a872
SHA1

85a81505fa79499dc9dc451b98d9c89e9b94c008
SHA256

42efa447d805b5ab033f854624919d9b57ae8144582bf71880c2a5b4f9e91823
SHA512

e9ea7b384acb1967fdb8363dc48ccf08df7a13bb587d8ebbe5f2ae9b3deba8f13fe246c30918e687fb92cf7028b81270cd3bb0db4a880fd4cc7ec168579152aa
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTS:ZRpAyazIliazTS

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

3972 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
3972	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-21_5d9d10899433b972058fa26c98e4a872_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

Processes:

2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2112 2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe
Token: SeDebugPrivilege 3972 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2112	2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe
Token: SeDebugPrivilege	3972	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe

description	pid	process	target process
PID 2112 wrote to memory of 3972	2112	2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe	CTS.exe
PID 2112 wrote to memory of 3972	2112	2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe	CTS.exe
PID 2112 wrote to memory of 3972	2112	2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2112

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:3972

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=2220 --field-trial-handle=2676,i,447940133669489189,1353734109898858672,262144 --variations-seed-version /prefetch:8
1⤵
PID:1480

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
789KB

MD5
ae777a702e712b717594ba40c6e30db8

SHA1
7a7baffb916a7f125385bad4644de051acd95ae5

SHA256
bbf69f4c177ea00e53e3b4e757f73e396584c6030ff84961c8c94449b9a0efca

SHA512
1d5ccc05cfa7449d1bf518f74e21f6a82e0d68865d1bc3a2fcac89fd4d714f00aca50d33cfc5249542544fa1bd010873b4a882e46dc670e80bd9bc3bf73c13e3

Download Submit
C:\Users\Admin\AppData\Local\Temp\KibqMrtZUSWqdYQ.exe

Filesize
72KB

MD5
30d651e134d91e27a765af0c130e30be

SHA1
8b7bc105acfd355303c79ece5ddcd5f0b990d770

SHA256
2a5a4326fc989d061942d08f98d7db318921009aa70d0f098be1d77226f899a8

SHA512
79a1c62f64d10b786fb3cc738360fd972dea2a9536740575f4caff3aa6ec7256323baa70ad79a3b04a3622881395bb62da2a45159a4a47466c76fa5060e35759

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit