2d2cd9eac20fa09a083d8f7c7c2d596c340e646e8d661cdce1e227b1f7c835af

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
02/06/2024, 23:00

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General

Target
2024-06-02_3b6111eb0b90dbb0c611704a4dcc10b5_bkransomware.exe
Size 288KB
Sample240602-2zbcesbd36
SHA256 2d2cd9eac20fa09a083d8f7c7c2d596c340e646e8d661cdce1e227b1f7c835af
MD5 3b6111eb0b90dbb0c611704a4dcc10b5
SHA1 d6b04ca2a6cd39c2e03f41fcafcb360dfa08a5b6
SHA512 69c71c5cb52dd8c9cb71d597cb764d439f63b760277e1b0cb372bdaa1e008451b55011453d240717f2e968b2f43342c5d0c5aa68cc70aac5055e33cfbca57c08
SSDEEP 6144:xZ8azZFi+IWa5m6wS+3rkG/NdLlTCfLIOX6VebysBz:xC0ZFi+IP59wS+3rkGvLYBL
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2680	yDaGvUoMkzkjAj6.exe
1884	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"	2024-06-02_3b6111eb0b90dbb0c611704a4dcc10b5_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	2024-06-02_3b6111eb0b90dbb0c611704a4dcc10b5_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4640	2024-06-02_3b6111eb0b90dbb0c611704a4dcc10b5_bkransomware.exe
Token: SeDebugPrivilege	1884	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4640 wrote to memory of 2680	4640	2024-06-02_3b6111eb0b90dbb0c611704a4dcc10b5_bkransomware.exe	82
PID 4640 wrote to memory of 2680	4640	2024-06-02_3b6111eb0b90dbb0c611704a4dcc10b5_bkransomware.exe	82
PID 4640 wrote to memory of 1884	4640	2024-06-02_3b6111eb0b90dbb0c611704a4dcc10b5_bkransomware.exe	83
PID 4640 wrote to memory of 1884	4640	2024-06-02_3b6111eb0b90dbb0c611704a4dcc10b5_bkransomware.exe	83
PID 4640 wrote to memory of 1884	4640	2024-06-02_3b6111eb0b90dbb0c611704a4dcc10b5_bkransomware.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-02_3b6111eb0b90dbb0c611704a4dcc10b5_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-02_3b6111eb0b90dbb0c611704a4dcc10b5_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4640
- C:\Users\Admin\AppData\Local\Temp\yDaGvUoMkzkjAj6.exe
  C:\Users\Admin\AppData\Local\Temp\yDaGvUoMkzkjAj6.exe
  2⤵
  - Executes dropped EXE
  PID:2680
- 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:1884

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

excel.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Size 392KB
SHA256 847d0de0de3731ec7a2671622ba2bba0b349f146082a0c1e4eb029322613fc60
MD5 62bd71b9192dc468cde5c4c1e205d7b7
SHA1 da1b9eea0feb546fb68ba816b2d310aa17396397
SHA512 2f773ad0ce0d44dd728a63ae47dc717451cb5b9890d4c33cd7a25d695ff085154e8bc828dd1aee5c3dc961aaac62d2c68ef05bf1ed809cb803524d6ba902b476
SSDEEP 6144:xZ8azYqUQISHZkLsx9RuuCWzsUWWU4Vwz5PnHdSkTXmCXwceWk5PAkbKgCnI:xC0YqdZSgVGxywz5/5rmCXwclkWkQI
MD5 SHA1 SHA512 SSDEEP

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yDaGvUoMkzkjAj6.exe

Path C:\Users\Admin\AppData\Local\Temp\yDaGvUoMkzkjAj6.exe
Size 217KB
SHA256 b2e32b3fa44b3a9a8fdfa906627355f6f48b4821929f9bce5ded2d07894361d4
MD5 f8a38fd27da720881c0af1ac99b8c1ad
SHA1 2ed31938119e2ebdeb0f5539c985e9965aef72d7
SHA512 aafa05bc5bd68687b998fe4d9a619caecc65d14f317af7a05ac0ecab7e231891e8719029245dc84eddce20bdd4c0cc6f4ffafdf8200227746b28cc6628564495
SSDEEP 3072:3IQqzmLHdlu5XsYTd85OLxGDTjyG0QXNSWtZdag8yTBfRUqqIgwz0MT:3IQqeHdA51d18T+G0QXMW30gPTB5/uwT
MD5 SHA1 SHA512 SSDEEP

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CTS.exe

Path C:\Windows\CTS.exe
Size 71KB
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT:ZRpAyazIliazT
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads