chaos | c4e56e9f1a23448f15f6f81dfdf3b2343e94ca1f33ba1f11a96a4b4182358664

Analysis

max time kernel
149s
max time network
94s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
18-10-2024 17:30

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General

Target

38f792a175c366b53407143da8c13ea2f1d3600b00ef8e8f6ec7e0ef79dcb6c0.exe
Size

244KB
MD5

bae6c0faa24fda3118cfdfc7f3f2553d
SHA1

e6592d7122a73fda5f9cd98b5e49d5d80f0fe4fe
SHA256

38f792a175c366b53407143da8c13ea2f1d3600b00ef8e8f6ec7e0ef79dcb6c0
SHA512

e400e14ba2e16d4ac197e2d99407142a48d3a8027faf12d1268c2f8bd293a00dec03e9e3d760e246a3b538b75754488e2a0e2d074d2f11fa775cfdd99b8ea0e9
SSDEEP

6144:8+jn7PfWDycKPudCuS74kvw6Mr9zmduLn+70pKXQl29ur4cm:8+gycSzre2q+70pKXQl29ur4c

Score

10^/10

chaos discovery persistence ransomware

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 1 IoCs

resource	yara_rule
behavioral4/memory/5104-1-0x00000191CB6E0000-0x00000191CB724000-memory.dmp	family_chaos

Executes dropped EXE 1 IoCs

pid	Process
4400	PerfWaston2.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2253712635-4068079004-3870069674-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rnts.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Rnts.exe"	PerfWaston2.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PerfWaston2.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4400	PerfWaston2.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5104 wrote to memory of 4400	5104	38f792a175c366b53407143da8c13ea2f1d3600b00ef8e8f6ec7e0ef79dcb6c0.exe	77
PID 5104 wrote to memory of 4400	5104	38f792a175c366b53407143da8c13ea2f1d3600b00ef8e8f6ec7e0ef79dcb6c0.exe	77
PID 5104 wrote to memory of 4400	5104	38f792a175c366b53407143da8c13ea2f1d3600b00ef8e8f6ec7e0ef79dcb6c0.exe	77

C:\Users\Admin\AppData\Local\Temp\38f792a175c366b53407143da8c13ea2f1d3600b00ef8e8f6ec7e0ef79dcb6c0.exe
"C:\Users\Admin\AppData\Local\Temp\38f792a175c366b53407143da8c13ea2f1d3600b00ef8e8f6ec7e0ef79dcb6c0.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5104
- C:\Users\Admin\AppData\Local\Temp\PerfWaston2.exe
  "C:\Users\Admin\AppData\Local\Temp\PerfWaston2.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4400

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

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\PerfWaston2.exe

Filesize
135KB

MD5
7f0b75bd98b323f54ed6b283a49b69b5

SHA1
9b09f703a968c5001665657557ce402c60b95e54

SHA256
725ff72b2dccc79b7d2b3dc0ef346d992ec46bd022eeb628318a954cc4309241

SHA512
e2397905fa9ed4a94fa573ce1bb4b4da830b9e8461b8231a9e3d5042d41c032eb6760ea31d68bc9cb7f197d1acdf72b16e8f0338f3a504777f6a264c214ed961

Download Submit
memory/4400-25-0x0000000007690000-0x0000000007BBC000-memory.dmp

Filesize
5.2MB

Download
memory/4400-18-0x0000000005900000-0x000000000599C000-memory.dmp

Filesize
624KB

Download
memory/4400-21-0x0000000005B10000-0x0000000005BA2000-memory.dmp

Filesize
584KB

Download
memory/4400-24-0x00000000747B0000-0x0000000074F61000-memory.dmp

Filesize
7.7MB

Download
memory/4400-22-0x0000000005A30000-0x0000000005A3A000-memory.dmp

Filesize
40KB

Download
memory/4400-16-0x00000000747BE000-0x00000000747BF000-memory.dmp

Filesize
4KB

Download
memory/4400-17-0x0000000000E70000-0x0000000000E98000-memory.dmp

Filesize
160KB

Download
memory/4400-27-0x00000000747B0000-0x0000000074F61000-memory.dmp

Filesize
7.7MB

Download
memory/4400-19-0x0000000006020000-0x00000000065C6000-memory.dmp

Filesize
5.6MB

Download
memory/4400-20-0x00000000747B0000-0x0000000074F61000-memory.dmp

Filesize
7.7MB

Download
memory/4400-32-0x00000000747B0000-0x0000000074F61000-memory.dmp

Filesize
7.7MB

Download
memory/4400-31-0x00000000747B0000-0x0000000074F61000-memory.dmp

Filesize
7.7MB

Download
memory/4400-30-0x00000000747BE000-0x00000000747BF000-memory.dmp

Filesize
4KB

Download
memory/4400-23-0x0000000005CA0000-0x0000000005CF6000-memory.dmp

Filesize
344KB

Download
memory/5104-15-0x00007FFABD6D0000-0x00007FFABE192000-memory.dmp

Filesize
10.8MB

Download
memory/5104-0-0x00007FFABD6D3000-0x00007FFABD6D5000-memory.dmp

Filesize
8KB

Download
memory/5104-28-0x00007FFABD6D3000-0x00007FFABD6D5000-memory.dmp

Filesize
8KB

Download
memory/5104-29-0x00007FFABD6D0000-0x00007FFABE192000-memory.dmp

Filesize
10.8MB

Download
memory/5104-1-0x00000191CB6E0000-0x00000191CB724000-memory.dmp

Filesize
272KB

Download
memory/5104-2-0x00007FFABD6D0000-0x00007FFABE192000-memory.dmp

Filesize
10.8MB

Download
memory/5104-11-0x00007FFABD6D0000-0x00007FFABE192000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads