f22b9281d70882f35fb8470465b0a35fa15688aaf8315e09c59a5b199dada225

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22/05/2024, 13:54

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General

Target

2024-05-22_5bb3cb6aa1153fb26460465765bb88f5_bkransomware.exe
Size

7.3MB
MD5

5bb3cb6aa1153fb26460465765bb88f5
SHA1

426ccc77da6e28ecb73444eb3a9f55b73e566bd3
SHA256

f22b9281d70882f35fb8470465b0a35fa15688aaf8315e09c59a5b199dada225
SHA512

528144e2b9b3309a968b96a53e256e01666b8eed715abe8f3bade565f9f4a4602fb702c40fbaa5682637e8fb41577a6fd4eb127c9629fca856eaf2d0cbb8ca8e
SSDEEP

196608:3835VCuywv7noUWxGNOjZ/t1+zVOaZecwT:3s/Cun8xGNOjZ/t1+z5Y

Score

9^/10

persistence spyware stealer

Malware Config

Signatures

Detects executables containing URLs to raw contents of a Github gist 2 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023431-2.dat	INDICATOR_SUSPICIOUS_EXE_RawGitHub_URL
behavioral2/memory/3776-12-0x00000000000F0000-0x0000000000836000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_RawGitHub_URL

Executes dropped EXE 2 IoCs

pid	Process
3776	Ekw0G3ztGF4clO1.exe
4964	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"	2024-05-22_5bb3cb6aa1153fb26460465765bb88f5_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	2024-05-22_5bb3cb6aa1153fb26460465765bb88f5_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2112	2024-05-22_5bb3cb6aa1153fb26460465765bb88f5_bkransomware.exe
Token: SeDebugPrivilege	4964	CTS.exe
Token: SeDebugPrivilege	3776	Ekw0G3ztGF4clO1.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2112 wrote to memory of 3776	2112	2024-05-22_5bb3cb6aa1153fb26460465765bb88f5_bkransomware.exe	83
PID 2112 wrote to memory of 3776	2112	2024-05-22_5bb3cb6aa1153fb26460465765bb88f5_bkransomware.exe	83
PID 2112 wrote to memory of 4964	2112	2024-05-22_5bb3cb6aa1153fb26460465765bb88f5_bkransomware.exe	85
PID 2112 wrote to memory of 4964	2112	2024-05-22_5bb3cb6aa1153fb26460465765bb88f5_bkransomware.exe	85
PID 2112 wrote to memory of 4964	2112	2024-05-22_5bb3cb6aa1153fb26460465765bb88f5_bkransomware.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-22_5bb3cb6aa1153fb26460465765bb88f5_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_5bb3cb6aa1153fb26460465765bb88f5_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2112
- C:\Users\Admin\AppData\Local\Temp\Ekw0G3ztGF4clO1.exe
  C:\Users\Admin\AppData\Local\Temp\Ekw0G3ztGF4clO1.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3776
- 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:4964

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

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Downloads

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

Filesize
393KB

MD5
7b0e840a8fd44430f4269eb814846bbf

SHA1
4dfaf807ef5ab5b2ac1c10ceb821bf90ea5007d8

SHA256
1fefe90fab12e0161252b40726fc19331cb95d96203b10cb474b2b3fb8d25b1a

SHA512
3449a42ce1af7640bdb5d36d26285a221c59286131f5ffa14c5335b2593d64ade80e903a61f0b02283eac4ba21c38cbecf0c7d68f21a7afae2aa6116b118c9de

Download Submit
C:\Users\Admin\AppData\Local\Temp\Ekw0G3ztGF4clO1.exe

Filesize
7.3MB

MD5
dd6b75a77601d62ac66df1b0a51a7de3

SHA1
699fc35deccb0cd6e341420903fc993535c2c98f

SHA256
2f46a1d48e1589e0aa10f215e77cb48fb90c531e19aa3c05d766f59b449f3c15

SHA512
43bd57e5379c22494aade734a45a443722327d48c7f06aa521048c99adba576e29bd70bba7bd28ba94f8f24f88efed7b8e5a1b3249cbfcb4d95fd0bc1f424d86

Download Submit
C:\Users\Admin\AppData\Local\Temp\config\chocolatey.config.3776.update

Filesize
9KB

MD5
14ffcf07375b3952bd3f2fe52bb63c14

SHA1
ab2eadde4c614eb8f1f2cae09d989c5746796166

SHA256
6ccfdb5979e715d12e597b47e1d56db94cf6d3a105b94c6e5f4dd8bab28ef5ed

SHA512
14a32151f7f7c45971b4c1adfb61f6af5136b1db93b50d00c6e1e3171e25b19749817b4e916d023ee1822caee64961911103087ca516cf6a0eafce1d17641fc4

Download Submit
C:\Users\Admin\AppData\Local\Temp\config\chocolatey.config.backup

Filesize
809B

MD5
8b6737800745d3b99886d013b3392ac3

SHA1
bb94da3f294922d9e8d31879f2d145586a182e19

SHA256
86f10504ca147d13a157944f926141fe164a89fa8a71847458bda7102abb6594

SHA512
654dda9b645b4900ac6e5bb226494921194dab7de71d75806f645d9b94ed820055914073ef9a5407e468089c0b2ee4d021f03c2ea61e73889b553895e79713df

Download Submit
C:\Users\Admin\AppData\Local\Temp\logs\chocolatey.log

Filesize
4KB

MD5
7d3d939ec004023944b35421fe7e4540

SHA1
5cffdc1810f1051eca6d2400aae713d79e7f2442

SHA256
ec7221aca588e0fe85fdf7a294ed8c6010ba0898532101d677f3418b8eff8e75

SHA512
d204a8dd019bc82270cfad6248ad5d456137b10641b879ebda5a3ca81dc4234a58d449459d56191d73c42ae626a04355a19fef91eb5b3adb1037e132bed3114d

Download Submit
C:\Users\Admin\AppData\Local\Temp\logs\chocolatey.log

Filesize
805B

MD5
0a7927ae4445025da12653f27966586d

SHA1
ef652f55f5f446f0fde2be01e0d44e9a8c070155

SHA256
35e5a5d85b572f016d6d605049e1d8d760661a4ad7f68b06385d4c9b211dc11e

SHA512
b2015dcaa0547083aec5cf0727d3e6ede6faa74fe1a423b0c9dd2e25ad8be00254a99f32d3ccf852d81e253ea15494d78ffe60f918a06b586f8a05416a7e198f

Download Submit
C:\Users\Admin\AppData\Local\Temp\logs\chocolatey.log

Filesize
2KB

MD5
27d93857de23a39090de29632b6e0283

SHA1
8e16956689241cf524044a6cf95e22098e993a5a

SHA256
00521f4e7743b9c5e8e16c541c90ba49602b5923ace196027e25b8f6755b65be

SHA512
15c7b620bfc8d6bc380a7b6339a39ddcf132df99584f98ae4f036044735fd9a51ae3aeabfa7467ae782d546df70ce1ea2ddec539a1e48916162678d7cd8893ea

Download Submit
C:\Users\Admin\AppData\Local\Temp\redirects\cpush.exe.ignore

Filesize
2B

MD5
81051bcc2cf1bedf378224b0a93e2877

SHA1
ba8ab5a0280b953aa97435ff8946cbcbb2755a27

SHA256
7eb70257593da06f682a3ddda54a9d260d4fc514f645237f5ca74b08f8da61a6

SHA512
1b302a2f1e624a5fb5ad94ddc4e5f8bfd74d26fa37512d0e5face303d8c40eee0d0ffa3649f5da43f439914d128166cb6c4774a7caa3b174d7535451eb697b5d

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit
memory/3776-34-0x00000000029F0000-0x0000000002A10000-memory.dmp

Filesize
128KB

Download
memory/3776-26-0x00007FFE24C40000-0x00007FFE25701000-memory.dmp

Filesize
10.8MB

Download
memory/3776-61-0x000000001D580000-0x000000001D5D0000-memory.dmp

Filesize
320KB

Download
memory/3776-63-0x000000001D650000-0x000000001D6C6000-memory.dmp

Filesize
472KB

Download
memory/3776-64-0x0000000002A30000-0x0000000002A4E000-memory.dmp

Filesize
120KB

Download
memory/3776-12-0x00000000000F0000-0x0000000000836000-memory.dmp

Filesize
7.3MB

Download
memory/3776-9-0x00007FFE24C43000-0x00007FFE24C45000-memory.dmp

Filesize
8KB

Download
memory/3776-169-0x00007FFE24C40000-0x00007FFE25701000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads