a697fa27a6a63f248d12c4716bf5feaf678c09aeea695bd8e8a0fd8829e94287

Analysis

max time kernel
143s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
07/06/2024, 22:43

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General

Target

2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe
Size

135KB
MD5

77d75393a71b68e6d4315225d2776c12
SHA1

88124a6e0dade8408d687b9bcac066275c8aea8e
SHA256

a697fa27a6a63f248d12c4716bf5feaf678c09aeea695bd8e8a0fd8829e94287
SHA512

22dd2c6a7fe273abe440d2463d3b04e28e79d8ce1d7d9b266c6f56ea075065369f6bf5b2941a360dee313db55bded95386850e806193dc4c813b60848adac16f
SSDEEP

3072:ZRpAyazIliazTJM8yKI7swt99g0kFZeAmkD5zXv:xZ8azFdyLTt9UFcAmkZ

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1104	m8FhYtsJ57ViW4Q.exe
3832	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"	2024-06-07_77d75393a71b68e6d4315225d2776c12_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	2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3452	2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe
Token: SeDebugPrivilege	3832	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3452 wrote to memory of 1104	3452	2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe	91
PID 3452 wrote to memory of 1104	3452	2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe	91
PID 3452 wrote to memory of 1104	3452	2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe	91
PID 3452 wrote to memory of 3832	3452	2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe	92
PID 3452 wrote to memory of 3832	3452	2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe	92
PID 3452 wrote to memory of 3832	3452	2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3452
- C:\Users\Admin\AppData\Local\Temp\m8FhYtsJ57ViW4Q.exe
  C:\Users\Admin\AppData\Local\Temp\m8FhYtsJ57ViW4Q.exe
  2⤵
  - Executes dropped EXE
  PID:1104
- 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:3832

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=1416 --field-trial-handle=3240,i,13319578961094268484,16557498665191861597,262144 --variations-seed-version /prefetch:8
1⤵
PID:4836

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
612d539f332504d27446f9b46cb954c0

SHA1
0c87d98d00686e6d12123613cd47f8b45684397e

SHA256
dd153332eb24465ddab430b54802fde1d3ed05568c8641633c40b1342fde708e

SHA512
08cb2b99300e2919657898dba8a097cdd8ce1b60a48aa5e9db8177daef87b0433ede08a6432042f882c4faa115adb0d6bb018965fada99f281d574f134e121e1

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C:\Users\Admin\AppData\Local\Temp\m8FhYtsJ57ViW4Q.exe

Filesize
64KB

MD5
a32a382b8a5a906e03a83b4f3e5b7a9b

SHA1
11e2bdd0798761f93cce363329996af6c17ed796

SHA256
75f12ea2f30d9c0d872dade345f30f562e6d93847b6a509ba53beec6d0b2c346

SHA512
ec87dd957be21b135212454646dcabdd7ef9442cf714e2c1f6b42b81f0c3fa3b1875bde9a8b538e8a0aa2190225649c29e9ed0f25176e7659e55e422dd4efe4c

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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