chaos | 0d9fcb8894240750cb5e4222ea78572aba6618eb5297c2069588ceb979d52d8b

Resubmissions

13-07-2024 09:54

240713-lxcvgawdmn 10

13-07-2024 09:52

240713-lv46yawdkj 10

13-07-2024 09:46

240713-lrz3tayajc 10

Analysis

max time kernel
844s
max time network
847s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
13-07-2024 09:52

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General

Target

cfda742c2de7706171af64a89806656a107069e1677aa4ce0583e696f954fde5.exe
Size

125KB
MD5

a0f62032cb73a15dd8f3d3165e29cbe5
SHA1

099e4d118e111e8fdf0d2ad1fba8e62b7edf80f1
SHA256

cfda742c2de7706171af64a89806656a107069e1677aa4ce0583e696f954fde5
SHA512

96e6ecd312cc6f44091a177865c87ba03ad7009f373195c8a0c73c9fd39030a785c34e80d203d5382082d496e6ccfc9356bea6c30da46ca296ac82a6c071c70e
SSDEEP

768:qn3kIQok/p54NwJfKXRu+r9iPe+FdbJVqB+QPE2IikqKs:Q3kInkH42IU+r9i2+F1Jok

Score

10^/10

chaos ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 3 IoCs

resource	yara_rule
behavioral26/memory/2856-1-0x0000000000E70000-0x0000000000E96000-memory.dmp	family_chaos
behavioral26/files/0x000a000000012283-4.dat	family_chaos
behavioral26/memory/2964-7-0x00000000011C0000-0x00000000011E6000-memory.dmp	family_chaos

Drops startup file 3 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	svchost.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt	svchost.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2964	svchost.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

Drops desktop.ini file(s) 34 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\Searches\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3434294380-2554721341-1919518612-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
824	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2964	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2856	cfda742c2de7706171af64a89806656a107069e1677aa4ce0583e696f954fde5.exe
2856	cfda742c2de7706171af64a89806656a107069e1677aa4ce0583e696f954fde5.exe
2856	cfda742c2de7706171af64a89806656a107069e1677aa4ce0583e696f954fde5.exe
2964	svchost.exe
2964	svchost.exe
2964	svchost.exe
2964	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2856	cfda742c2de7706171af64a89806656a107069e1677aa4ce0583e696f954fde5.exe
Token: SeDebugPrivilege	2964	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2856 wrote to memory of 2964	2856	cfda742c2de7706171af64a89806656a107069e1677aa4ce0583e696f954fde5.exe	30
PID 2856 wrote to memory of 2964	2856	cfda742c2de7706171af64a89806656a107069e1677aa4ce0583e696f954fde5.exe	30
PID 2856 wrote to memory of 2964	2856	cfda742c2de7706171af64a89806656a107069e1677aa4ce0583e696f954fde5.exe	30
PID 2964 wrote to memory of 824	2964	svchost.exe	31
PID 2964 wrote to memory of 824	2964	svchost.exe	31
PID 2964 wrote to memory of 824	2964	svchost.exe	31

C:\Users\Admin\AppData\Local\Temp\cfda742c2de7706171af64a89806656a107069e1677aa4ce0583e696f954fde5.exe
"C:\Users\Admin\AppData\Local\Temp\cfda742c2de7706171af64a89806656a107069e1677aa4ce0583e696f954fde5.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2856
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Drops desktop.ini file(s)
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2964
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:824

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
125KB

MD5
a0f62032cb73a15dd8f3d3165e29cbe5

SHA1
099e4d118e111e8fdf0d2ad1fba8e62b7edf80f1

SHA256
cfda742c2de7706171af64a89806656a107069e1677aa4ce0583e696f954fde5

SHA512
96e6ecd312cc6f44091a177865c87ba03ad7009f373195c8a0c73c9fd39030a785c34e80d203d5382082d496e6ccfc9356bea6c30da46ca296ac82a6c071c70e

Download Submit
C:\Users\Admin\Desktop\read_it.txt

Filesize
237B

MD5
f5b105fbbadaae72bdaf972727e4c1b2

SHA1
ee5fdfa130687cdf79f50e941ddbf86dae5d433b

SHA256
a9cf9b49f1b35e24a4acd9daba945acc268a50755330457b8d94a8652f71dfcd

SHA512
f9f10467908d686add6d455db5dbb14019e8fbf2a0a2a19e50c915b24faad7e5c9d6cadd3ceba0407bfaf0fc0b97468d738bb1a7f74cf17b768415ad94b8a7dc

Download Submit
memory/2856-0-0x000007FEF5453000-0x000007FEF5454000-memory.dmp

Filesize
4KB

Download
memory/2856-1-0x0000000000E70000-0x0000000000E96000-memory.dmp

Filesize
152KB

Download
memory/2964-7-0x00000000011C0000-0x00000000011E6000-memory.dmp

Filesize
152KB

Download
memory/2964-57-0x000007FEF5450000-0x000007FEF5E3C000-memory.dmp

Filesize
9.9MB

Download
memory/2964-72-0x000007FEF5450000-0x000007FEF5E3C000-memory.dmp

Filesize
9.9MB

Download
memory/2964-73-0x000007FEF5450000-0x000007FEF5E3C000-memory.dmp

Filesize
9.9MB

Download
memory/2964-74-0x000007FEF5450000-0x000007FEF5E3C000-memory.dmp

Filesize
9.9MB

Download