fdf48253fffcbcf1bbc1f212cb2440e9ce371388f49f64b621c3943bb87e094f

Analysis

max time kernel
144s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
13/06/2024, 03:45

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General

Target
2024-06-13_985658a7146f0eac4711714c18c7b05d_bkransomware.exe
Size 71KB
Sample240613-ebba7ataqg
SHA256 fdf48253fffcbcf1bbc1f212cb2440e9ce371388f49f64b621c3943bb87e094f
MD5 985658a7146f0eac4711714c18c7b05d
SHA1 6903bd0fa7460cd89f1160ba5f12d720fefd1118
SHA512 55f515b96d046c221c2e714d6af718f8a98ffd4edb16b5a040c60aa5da50c826a3d81245e05cabafaa04e2695dd3d97a92dfd85858699ff62bdbc5924e2e2121
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTAj:ZhpAyazIlyazTm
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
696	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"	2024-06-13_985658a7146f0eac4711714c18c7b05d_bkransomware.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	CTS.exe
File created	C:\Windows\CTS.exe	2024-06-13_985658a7146f0eac4711714c18c7b05d_bkransomware.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4580	2024-06-13_985658a7146f0eac4711714c18c7b05d_bkransomware.exe
Token: SeDebugPrivilege	696	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4580 wrote to memory of 696	4580	2024-06-13_985658a7146f0eac4711714c18c7b05d_bkransomware.exe	93
PID 4580 wrote to memory of 696	4580	2024-06-13_985658a7146f0eac4711714c18c7b05d_bkransomware.exe	93
PID 4580 wrote to memory of 696	4580	2024-06-13_985658a7146f0eac4711714c18c7b05d_bkransomware.exe	93

C:\Users\Admin\AppData\Local\Temp\2024-06-13_985658a7146f0eac4711714c18c7b05d_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-13_985658a7146f0eac4711714c18c7b05d_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4580
- 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:696

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=4092 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:8
1⤵
PID:1788

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 789KB
SHA256 1c8ddcf14d2c7ce0f8ce152759878888af4f8863aa36ee2a161507bb665374f8
MD5 011cc10fb33e911a967be4fe31ba0f63
SHA1 ebd1d49e41af071be7e40106f2e618f17459e7eb
SHA512 692a76aab2b5f4184c177c9773847cda9a44da57ced914a3dae7b1dc55a4b01f40d8350618d57de6beb34aebe4c5f6a2139a1efc06bd869bcb8f261f833bd6cd
SSDEEP 24576:D6zi9Dby6epfHhtdqEn1pcooVz1/c0eKwU5gC:D59Du6OB66vgVz10K5gC
MD5 SHA1 SHA512 SSDEEP

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U6difkvqEO2Ech8.exe

Path C:\Users\Admin\AppData\Local\Temp\U6difkvqEO2Ech8.exe
Size 71KB
SHA256 be1f224ac6704b76f266c1c53bfa410cda5b9ef33c5ef92f4a02d8996e646d54
MD5 cfdb0a6e8d8863eecd1ddd8ad3c8fa42
SHA1 5339f9b0d2934ad31647872372a5139f3480d770
SHA512 9bc375875f48809e5462d07c217a24ea27bf0c023ea0f07cb47f9ac682894bf13fb6189409cc43af849b73db194c1920abd4a9f6a60ec54527c18267ca3845bc
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTI:ZhpAyazIlyazTI
MD5 SHA1 SHA512 SSDEEP

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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

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads