5d419d1eee094ab0cccdd4a90d43564bf2e6856463048b44b9449a9040111243

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
31/05/2024, 10:39

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General

Target
2024-05-31_ac3dcd80444f34e1d0adbb6b13aec839_bkransomware.exe
Size 96KB
Sample240531-mpymmseh7s
SHA256 5d419d1eee094ab0cccdd4a90d43564bf2e6856463048b44b9449a9040111243
MD5 ac3dcd80444f34e1d0adbb6b13aec839
SHA1 834fc5405e525a0f3955c1e08c7d3eb8d90a074c
SHA512 8ffae5735d8632d33f0e26f728638a9b089e90ca1512c64426d5e4cd39ec3692a4d24fad9baae4d3fa3df5af8b74236de334c8489e78e2ac59fdc0a285d57001
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTPp6UIu+0I/SP0vpGlB4FUN:ZRpAyazIliazTx6UIoI/SP8AKUN
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2924	QpQKv0mwcdKAkFq.exe
4368	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"	CTS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-31_ac3dcd80444f34e1d0adbb6b13aec839_bkransomware.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-05-31_ac3dcd80444f34e1d0adbb6b13aec839_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2848	2024-05-31_ac3dcd80444f34e1d0adbb6b13aec839_bkransomware.exe
Token: SeDebugPrivilege	4368	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2848 wrote to memory of 2924	2848	2024-05-31_ac3dcd80444f34e1d0adbb6b13aec839_bkransomware.exe	84
PID 2848 wrote to memory of 2924	2848	2024-05-31_ac3dcd80444f34e1d0adbb6b13aec839_bkransomware.exe	84
PID 2848 wrote to memory of 4368	2848	2024-05-31_ac3dcd80444f34e1d0adbb6b13aec839_bkransomware.exe	85
PID 2848 wrote to memory of 4368	2848	2024-05-31_ac3dcd80444f34e1d0adbb6b13aec839_bkransomware.exe	85
PID 2848 wrote to memory of 4368	2848	2024-05-31_ac3dcd80444f34e1d0adbb6b13aec839_bkransomware.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-31_ac3dcd80444f34e1d0adbb6b13aec839_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_ac3dcd80444f34e1d0adbb6b13aec839_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2848
- C:\Users\Admin\AppData\Local\Temp\QpQKv0mwcdKAkFq.exe
  C:\Users\Admin\AppData\Local\Temp\QpQKv0mwcdKAkFq.exe
  2⤵
  - Executes dropped EXE
  PID:2924
- 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:4368

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 394KB
SHA256 e8ebb04f2223a968cb2b4b43c475980b6453356b555f91ce38b66c30f1746a66
MD5 887c4f82d2afdcc22f193759b9b1d2e2
SHA1 a4ed9ce9118b9b9c3bd85c53339d8afdb2370b4d
SHA512 2a8c3627948a42eb38c2f3041a554a57b069feb10f1d5b86bcf80d19e84251022953b1a8e08896eab8f12c6133663bb0f5b009f48ca3cf2ea74626c2c9b7f7de
SSDEEP 12288:xC0+OtiTCVtAPkTAgfm1wX6gxAfObQf5G2KOBx:DvfCmAgwwXFxrbQf5GLOBx
MD5 SHA1 SHA512 SSDEEP

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QpQKv0mwcdKAkFq.exe

Path C:\Users\Admin\AppData\Local\Temp\QpQKv0mwcdKAkFq.exe
Size 25KB
SHA256 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
MD5 abbd49c180a2f8703f6306d6fa731fdc
SHA1 d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA512 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
SSDEEP 384:OSZ/JKNZKZCGRHJPth4VKAvDgDJgoku8:OSQQTRJPzkKAEN
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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memory/2924-13-0x0000000000400000-0x000000000040D000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads