f3dd518a5b39a4eff2c8f1e1b87582c1352aa09ba50038673cb6503f09dde4bb

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 17:57

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General

Target

2024-05-24_a2cb2666a65fc58db7fc32914fb9b69d_bkransomware.exe
Size

7.3MB
MD5

a2cb2666a65fc58db7fc32914fb9b69d
SHA1

ca021083c020ad92bc98fbb57ea4b7ae9f3f5585
SHA256

f3dd518a5b39a4eff2c8f1e1b87582c1352aa09ba50038673cb6503f09dde4bb
SHA512

a46236f6bf9cc4bbd3dbdc130e20935e534cb2fd540bff0b79008451d545944ddd7469ac466294439dabae8ae2ce9b370fa6478264f2252bd6992a7d53d3dee1
SSDEEP

196608:na6ktxC0ZWnd6WcF0DGi7m9orub/cXRbD466h2ZF:a6kt0d6WcCDGYmWruQJD564F

Score

9^/10

persistence spyware stealer

Malware Config

Signatures

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

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\w9oonDpokcV6eQz.exe	INDICATOR_SUSPICIOUS_EXE_RawGitHub_URL
behavioral2/memory/1508-23-0x0000000000180000-0x00000000008C6000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_RawGitHub_URL

Executes dropped EXE 2 IoCs

Processes:

w9oonDpokcV6eQz.exeCTS.exe

pid process

1508 w9oonDpokcV6eQz.exe
3972 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

pid	process
1508	w9oonDpokcV6eQz.exe
3972	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-24_a2cb2666a65fc58db7fc32914fb9b69d_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-24_a2cb2666a65fc58db7fc32914fb9b69d_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

Processes:

2024-05-24_a2cb2666a65fc58db7fc32914fb9b69d_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-24_a2cb2666a65fc58db7fc32914fb9b69d_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-24_a2cb2666a65fc58db7fc32914fb9b69d_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

2024-05-24_a2cb2666a65fc58db7fc32914fb9b69d_bkransomware.exeCTS.exew9oonDpokcV6eQz.exe

description	pid	process
Token: SeDebugPrivilege	4364	2024-05-24_a2cb2666a65fc58db7fc32914fb9b69d_bkransomware.exe
Token: SeDebugPrivilege	3972	CTS.exe
Token: SeDebugPrivilege	1508	w9oonDpokcV6eQz.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-05-24_a2cb2666a65fc58db7fc32914fb9b69d_bkransomware.exe

description	pid	process	target process
PID 4364 wrote to memory of 1508	4364	2024-05-24_a2cb2666a65fc58db7fc32914fb9b69d_bkransomware.exe	w9oonDpokcV6eQz.exe
PID 4364 wrote to memory of 1508	4364	2024-05-24_a2cb2666a65fc58db7fc32914fb9b69d_bkransomware.exe	w9oonDpokcV6eQz.exe
PID 4364 wrote to memory of 3972	4364	2024-05-24_a2cb2666a65fc58db7fc32914fb9b69d_bkransomware.exe	CTS.exe
PID 4364 wrote to memory of 3972	4364	2024-05-24_a2cb2666a65fc58db7fc32914fb9b69d_bkransomware.exe	CTS.exe
PID 4364 wrote to memory of 3972	4364	2024-05-24_a2cb2666a65fc58db7fc32914fb9b69d_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_a2cb2666a65fc58db7fc32914fb9b69d_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_a2cb2666a65fc58db7fc32914fb9b69d_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4364

C:\Users\Admin\AppData\Local\Temp\w9oonDpokcV6eQz.exe
C:\Users\Admin\AppData\Local\Temp\w9oonDpokcV6eQz.exe
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1508

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:3972

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
394KB

MD5
3292dd9ac4afdd4828f614e41ee62e65

SHA1
25527fa09d35806b2042354d54818855591616a0

SHA256
511c8f2edb4cf62850f2f961752c317fe42e93163101ab0911335da782711cd5

SHA512
045762bfeaf278c2016f941f2e1cffeaf84d3a4aead82581dbbce7c28c1e36aeeb899e95d6e5179c4646c695e36311e5817383e84a53f54556e42d33c889599a

Download Submit
C:\Users\Admin\AppData\Local\Temp\config\chocolatey.config.1508.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
1821c693b536a425d5a1bec15983f9d2

SHA1
681c3bf9b4875d8604ed91531c1e8b10c09595c8

SHA256
9b4dfef625797e61c5dfd40fe26d924d4ad4b5bbc3b44668f08a6e2e098a0dba

SHA512
2f15b16cde66e9e7a6177b5af554c999ffe87b4530b4431fa45955ac847e0b6bb7e001b8cbb8ccbbf88b3c9cc089987b5712f1627778f1ae7da17ca6f2da9476

Download Submit
C:\Users\Admin\AppData\Local\Temp\logs\chocolatey.log
Filesize
805B

MD5
b545bae935d0d0e53d30c0c77569c8d3

SHA1
2bfe97dd26ac53d13d3d77089c7aba432d52a410

SHA256
0a2cbf419980cd28621fb61df878d4824f340976f5a928ae381786d86cef9204

SHA512
d6dc1d83e0575ee2bccfc55410c99d16a62cbd91b46049e79b395617a7124cda138dc121d29ffc74673429513b6bf99c2292a9f62efab9678c0614afacc4b22e

Download Submit
C:\Users\Admin\AppData\Local\Temp\logs\chocolatey.log
Filesize
1KB

MD5
f6d1e42007c4b7435e86a3bc2890adb5

SHA1
a530eea017a34b575bac07d7e2dc43cfc8c989d3

SHA256
9798c6347e50efd88a635ff609bf9e2625924700b7a836124155c667cae458a3

SHA512
70148f489037fdfbaa0007c5711c8b72ba7a399c41295c75d743952411ddb652243bf05c0382c844038a64f3f03a61120a86bf4f48fdf5eeedce2f9c7c8e1939

Download Submit
C:\Users\Admin\AppData\Local\Temp\logs\chocolatey.log
Filesize
2KB

MD5
74d113e9d2c6d915f0b145ee2f55776b

SHA1
75e0cabad92b2321c909bfdd0799b72bed08e80b

SHA256
9bf7691b45212b65f1568b0cdabb7f04051e31a8bab0b7c5dbc3e25b75ee313a

SHA512
47f0725b9436287676045f8531575c4f64babfdd57c1596d865068ee09d1851f2e0a4ad98a97390f908e5baf366c9a6c09972efda9e69e57cb57d4c5b9f2c277

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:\Users\Admin\AppData\Local\Temp\w9oonDpokcV6eQz.exe
Filesize
7.3MB

MD5
dd6b75a77601d62ac66df1b0a51a7de3

SHA1
699fc35deccb0cd6e341420903fc993535c2c98f

SHA256
2f46a1d48e1589e0aa10f215e77cb48fb90c531e19aa3c05d766f59b449f3c15

SHA512
43bd57e5379c22494aade734a45a443722327d48c7f06aa521048c99adba576e29bd70bba7bd28ba94f8f24f88efed7b8e5a1b3249cbfcb4d95fd0bc1f424d86

Download Submit
C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit
memory/1508-23-0x0000000000180000-0x00000000008C6000-memory.dmp

Filesize
7.3MB

Download
memory/1508-64-0x000000001D6A0000-0x000000001D716000-memory.dmp

Filesize
472KB

Download
memory/1508-65-0x0000000001120000-0x000000000113E000-memory.dmp

Filesize
120KB

Download
memory/1508-63-0x0000000002970000-0x00000000029C0000-memory.dmp

Filesize
320KB

Download
memory/1508-35-0x00000000010C0000-0x00000000010E0000-memory.dmp

Filesize
128KB

Download
memory/1508-27-0x00007FFC9B8F0000-0x00007FFC9C3B1000-memory.dmp

Filesize
10.8MB

Download
memory/1508-10-0x00007FFC9B8F3000-0x00007FFC9B8F5000-memory.dmp

Filesize
8KB

Download
memory/1508-170-0x00007FFC9B8F0000-0x00007FFC9C3B1000-memory.dmp

Filesize
10.8MB

Download