93a56e357be531e2a016af7e6582d5956e00a0622bc3837c8df3a359b5eb8a20

Analysis

max time kernel
140s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
03-05-2024 03:48

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General

Target

2024-05-03_c0fc2da9c7df92787e67caee0bcc93f9_bkransomware.exe
Size

288KB
MD5

c0fc2da9c7df92787e67caee0bcc93f9
SHA1

decfb755e5056fddcd4df69795ea5ac7f2d964fa
SHA256

93a56e357be531e2a016af7e6582d5956e00a0622bc3837c8df3a359b5eb8a20
SHA512

d6320d035400c5340bb311d4603e7aa0bc2dcdb4fdba4dff99723c7324c559cb4d866065ac7a715f5714d9924ceb2993bf4da1f9f2eef1b6a9ee48e8bfb3f382
SSDEEP

6144:hZMazklZpNoLG69jWbAF+W99BwM1UR73//JixIlJu9ij5+l/0fDQ2dB:hS0klZkd9qAF+e9BOR734Qj5w/4FB

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1076	rtfC4OnCqu7pQwN.exe
1088	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"	2024-05-03_c0fc2da9c7df92787e67caee0bcc93f9_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	2024-05-03_c0fc2da9c7df92787e67caee0bcc93f9_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5048	2024-05-03_c0fc2da9c7df92787e67caee0bcc93f9_bkransomware.exe
Token: SeDebugPrivilege	1088	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5048 wrote to memory of 1076	5048	2024-05-03_c0fc2da9c7df92787e67caee0bcc93f9_bkransomware.exe	83
PID 5048 wrote to memory of 1076	5048	2024-05-03_c0fc2da9c7df92787e67caee0bcc93f9_bkransomware.exe	83
PID 5048 wrote to memory of 1088	5048	2024-05-03_c0fc2da9c7df92787e67caee0bcc93f9_bkransomware.exe	84
PID 5048 wrote to memory of 1088	5048	2024-05-03_c0fc2da9c7df92787e67caee0bcc93f9_bkransomware.exe	84
PID 5048 wrote to memory of 1088	5048	2024-05-03_c0fc2da9c7df92787e67caee0bcc93f9_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-03_c0fc2da9c7df92787e67caee0bcc93f9_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_c0fc2da9c7df92787e67caee0bcc93f9_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5048
- C:\Users\Admin\AppData\Local\Temp\rtfC4OnCqu7pQwN.exe
  C:\Users\Admin\AppData\Local\Temp\rtfC4OnCqu7pQwN.exe
  2⤵
  - Executes dropped EXE
  PID:1076
- 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:1088

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

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

Filesize
394KB

MD5
fdf06ef23bf4ac34be3d3d9bd862a2de

SHA1
c1e96994098cdf05dc90c66c4d8dc969b2f6bcb4

SHA256
0643ff44bb1a1e2e7b680a441f990a3ed1bdf92aa66e93a37b3acd91a2d3b1e8

SHA512
35778c7e1ccc9e5f9cfe8548d00de719a22f2ba8f5ff27f87d1217bab20cb7531f038b498425062272f7250e4ab587855725f3acd23fed3a580b59b370ea7037

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C:\Users\Admin\AppData\Local\Temp\rtfC4OnCqu7pQwN.exe

Filesize
217KB

MD5
f8a38fd27da720881c0af1ac99b8c1ad

SHA1
2ed31938119e2ebdeb0f5539c985e9965aef72d7

SHA256
b2e32b3fa44b3a9a8fdfa906627355f6f48b4821929f9bce5ded2d07894361d4

SHA512
aafa05bc5bd68687b998fe4d9a619caecc65d14f317af7a05ac0ecab7e231891e8719029245dc84eddce20bdd4c0cc6f4ffafdf8200227746b28cc6628564495

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads