0667c0f14aa5ec5c307a442d0b2865a1faabffb3bd12520e8f18d08d7ff15461

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
08/06/2024, 08:33

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2024-06-08_b25030c135120b791b9f764c7d4bf1fc_bkransomware.exe
Size 96KB
Sample240608-kfw2caae5t
SHA256 0667c0f14aa5ec5c307a442d0b2865a1faabffb3bd12520e8f18d08d7ff15461
MD5 b25030c135120b791b9f764c7d4bf1fc
SHA1 01c53d87403835d012513132df74d6cb29620cd6
SHA512 b537e243ff5059deab24c5635daf80041e3059b845e62ca0a1057944ba25d4262a0a90e8fba02136dca9e66b8fb4536dc9a7a4818cce0cc3073c87db8c837abb
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTLcGk0Gfg29mBV2iq2:ZhpAyazIlyazTQ70GIhBW2
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
4584	IOikMuBStab8LvT.exe
464	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"	2024-06-08_b25030c135120b791b9f764c7d4bf1fc_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	2024-06-08_b25030c135120b791b9f764c7d4bf1fc_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5020	2024-06-08_b25030c135120b791b9f764c7d4bf1fc_bkransomware.exe
Token: SeDebugPrivilege	464	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5020 wrote to memory of 4584	5020	2024-06-08_b25030c135120b791b9f764c7d4bf1fc_bkransomware.exe	90
PID 5020 wrote to memory of 4584	5020	2024-06-08_b25030c135120b791b9f764c7d4bf1fc_bkransomware.exe	90
PID 5020 wrote to memory of 464	5020	2024-06-08_b25030c135120b791b9f764c7d4bf1fc_bkransomware.exe	92
PID 5020 wrote to memory of 464	5020	2024-06-08_b25030c135120b791b9f764c7d4bf1fc_bkransomware.exe	92
PID 5020 wrote to memory of 464	5020	2024-06-08_b25030c135120b791b9f764c7d4bf1fc_bkransomware.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-06-08_b25030c135120b791b9f764c7d4bf1fc_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-08_b25030c135120b791b9f764c7d4bf1fc_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5020
- C:\Users\Admin\AppData\Local\Temp\IOikMuBStab8LvT.exe
  C:\Users\Admin\AppData\Local\Temp\IOikMuBStab8LvT.exe
  2⤵
  - Executes dropped EXE
  PID:4584
- 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:464

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=3928 --field-trial-handle=3088,i,14310325015283915034,7660943942870463106,262144 --variations-seed-version /prefetch:8
1⤵
PID:4660

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

Replay Monitor

Loading Replay Monitor...

Downloads

excel.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Size 789KB
SHA256 8edfcac5e57374d0260c2a4d7818f18268eff3c7fd68c273a0af7544b7f14575
MD5 eebd60718a6bb9577de28019466ef580
SHA1 cbbf6df2cdb41939a21e793149841fb8788f68c4
SHA512 ebcd9ad924e00a40cda7947c2e773bff1ba4ee7dab38d8a61f8499758cb7bdb0064cc9c557022237474bf49752a476434c7e6f65258090e1592f064011c58a96
SSDEEP 12288:hS0NgEGPR/5fYimgDBsCokcKHlXLvDoUSQyGT4ONLX5qHpbYbxwra:DNvGPfYgBRCsvDVyPWtq1FW
MD5 SHA1 SHA512 SSDEEP

Submit Download

IOikMuBStab8LvT.exe

Path C:\Users\Admin\AppData\Local\Temp\IOikMuBStab8LvT.exe
Size 25KB
SHA256 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
MD5 abbd49c180a2f8703f6306d6fa731fdc
SHA1 d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA512 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
SSDEEP 384:OSZ/JKNZKZCGRHJPth4VKAvDgDJgoku8:OSQQTRJPzkKAEN
MD5 SHA1 SHA512 SSDEEP

Submit Download

CTS.exe

Path C:\Windows\CTS.exe
Size 71KB
SHA256 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
MD5 66df4ffab62e674af2e75b163563fc0b
SHA1 dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA512 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT:ZhpAyazIlyazT
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/4584-9-0x0000000000400000-0x000000000040D000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads