33de95ff72f71d929137d1a36b87848e6fca8e1fd58fc532920cfaaf4e17f2bb

General

Target

2024-05-21_259923a3af4c6401255b3771965d1f93_bkransomware.exe
Size

96KB
MD5

259923a3af4c6401255b3771965d1f93
SHA1

115b71fb24806b54a22c5562f127bbf6da545dcc
SHA256

33de95ff72f71d929137d1a36b87848e6fca8e1fd58fc532920cfaaf4e17f2bb
SHA512

7e04433f2f42cdebca4206ce061c437ee4995e353362f60323b86f9632e4c8a7a491bcdea628046f6bb56a5a5632d1af1d6b39a2568e3c3ec429bd54951c3f65
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT20CJOpdfJUOCV8s6no:ZRpAyazIliazT2FcUbAno

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

uxLcAYHaE4F4JP6.exeCTS.exe

pid process

5100 uxLcAYHaE4F4JP6.exe
2152 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
5100	uxLcAYHaE4F4JP6.exe
2152	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_259923a3af4c6401255b3771965d1f93_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_259923a3af4c6401255b3771965d1f93_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_259923a3af4c6401255b3771965d1f93_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-21_259923a3af4c6401255b3771965d1f93_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-21_259923a3af4c6401255b3771965d1f93_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4412 2024-05-21_259923a3af4c6401255b3771965d1f93_bkransomware.exe
Token: SeDebugPrivilege 2152 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-21_259923a3af4c6401255b3771965d1f93_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4412	2024-05-21_259923a3af4c6401255b3771965d1f93_bkransomware.exe
Token: SeDebugPrivilege	2152	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-05-21_259923a3af4c6401255b3771965d1f93_bkransomware.exe

description	pid	process	target process
PID 4412 wrote to memory of 5100	4412	2024-05-21_259923a3af4c6401255b3771965d1f93_bkransomware.exe	uxLcAYHaE4F4JP6.exe
PID 4412 wrote to memory of 5100	4412	2024-05-21_259923a3af4c6401255b3771965d1f93_bkransomware.exe	uxLcAYHaE4F4JP6.exe
PID 4412 wrote to memory of 2152	4412	2024-05-21_259923a3af4c6401255b3771965d1f93_bkransomware.exe	CTS.exe
PID 4412 wrote to memory of 2152	4412	2024-05-21_259923a3af4c6401255b3771965d1f93_bkransomware.exe	CTS.exe
PID 4412 wrote to memory of 2152	4412	2024-05-21_259923a3af4c6401255b3771965d1f93_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_259923a3af4c6401255b3771965d1f93_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_259923a3af4c6401255b3771965d1f93_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4412
- C:\Users\Admin\AppData\Local\Temp\uxLcAYHaE4F4JP6.exe
  C:\Users\Admin\AppData\Local\Temp\uxLcAYHaE4F4JP6.exe
  2⤵
  - Executes dropped EXE
  PID:5100
- 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:2152

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=4060 --field-trial-handle=2292,i,2103142837140538807,15881446839139365070,262144 --variations-seed-version /prefetch:8
1⤵
PID:4560

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

1

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
f41059525303bf9d9005550edbdf1fdc

SHA1
f0868a1926e67d4f0ab8e5880588510fb8618934

SHA256
76d9a3036168ddcabfddc61c7b5206882a1972e9f9b020d8435ef62d8f20e243

SHA512
b52626eccc364bdc2596b6f758ec3bf1204422bfdb51686b185b7490c3131d58e5924bead3214f348b521d7634e9f26471d9ba5fe9be9ada71ee2ee58d584b6c

Download Submit
C:\Users\Admin\AppData\Local\Temp\uxLcAYHaE4F4JP6.exe

Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit
memory/5100-5-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads