chaos | c4e56e9f1a23448f15f6f81dfdf3b2343e94ca1f33ba1f11a96a4b4182358664

Analysis

max time kernel
121s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
18-10-2024 17:30

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General

Target

be7c6e308b1d8a20cc46232fc95f6c094717f05cadb0c7a03108d969b561f68e.exe
Size

244KB
MD5

751df604e41a7e473fd3817b4c16d5f6
SHA1

30d6eacf97d1a5e6ec191f75a8eb16d9da54f218
SHA256

be7c6e308b1d8a20cc46232fc95f6c094717f05cadb0c7a03108d969b561f68e
SHA512

6c546d46e6b7c0adffee2bdcf2b85b786b57fbf73c4213e39bf54e4ceaceaa5f143e0e9d57d0398464074e46c0242bd649fa80615d1dc3db32f08b061a7629d7
SSDEEP

6144:8+jn7PfWDycKPudCuS74kvw6Mr9zmduLb+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

Processes:

resource	yara_rule
behavioral13/memory/2092-1-0x0000000000B80000-0x0000000000BC4000-memory.dmp	family_chaos

Executes dropped EXE 1 IoCs

Processes:

PerfWaston2.exe

pid process

2560 PerfWaston2.exe

pid	process
2560	PerfWaston2.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

PerfWaston2.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\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

Processes:

PerfWaston2.exe

description ioc process

Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language PerfWaston2.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

PerfWaston2.exe

description pid process

Token: SeDebugPrivilege 2560 PerfWaston2.exe

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

description	pid	process
Token: SeDebugPrivilege	2560	PerfWaston2.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

be7c6e308b1d8a20cc46232fc95f6c094717f05cadb0c7a03108d969b561f68e.exe

description	pid	process	target process
PID 2092 wrote to memory of 2560	2092	be7c6e308b1d8a20cc46232fc95f6c094717f05cadb0c7a03108d969b561f68e.exe	PerfWaston2.exe
PID 2092 wrote to memory of 2560	2092	be7c6e308b1d8a20cc46232fc95f6c094717f05cadb0c7a03108d969b561f68e.exe	PerfWaston2.exe
PID 2092 wrote to memory of 2560	2092	be7c6e308b1d8a20cc46232fc95f6c094717f05cadb0c7a03108d969b561f68e.exe	PerfWaston2.exe
PID 2092 wrote to memory of 2560	2092	be7c6e308b1d8a20cc46232fc95f6c094717f05cadb0c7a03108d969b561f68e.exe	PerfWaston2.exe

C:\Users\Admin\AppData\Local\Temp\be7c6e308b1d8a20cc46232fc95f6c094717f05cadb0c7a03108d969b561f68e.exe
"C:\Users\Admin\AppData\Local\Temp\be7c6e308b1d8a20cc46232fc95f6c094717f05cadb0c7a03108d969b561f68e.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2092

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:2560

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

Replay Monitor

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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/2092-16-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

Filesize
9.9MB

Download
memory/2092-1-0x0000000000B80000-0x0000000000BC4000-memory.dmp

Filesize
272KB

Download
memory/2092-2-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

Filesize
9.9MB

Download
memory/2092-5-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

Filesize
9.9MB

Download
memory/2092-18-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

Filesize
9.9MB

Download
memory/2092-0-0x000007FEF57A3000-0x000007FEF57A4000-memory.dmp

Filesize
4KB

Download
memory/2092-17-0x000007FEF57A3000-0x000007FEF57A4000-memory.dmp

Filesize
4KB

Download
memory/2560-11-0x0000000000290000-0x00000000002B8000-memory.dmp

Filesize
160KB

Download
memory/2560-15-0x0000000074630000-0x0000000074D1E000-memory.dmp

Filesize
6.9MB

Download
memory/2560-13-0x0000000074630000-0x0000000074D1E000-memory.dmp

Filesize
6.9MB

Download
memory/2560-12-0x0000000074630000-0x0000000074D1E000-memory.dmp

Filesize
6.9MB

Download
memory/2560-10-0x000000007463E000-0x000000007463F000-memory.dmp

Filesize
4KB

Download
memory/2560-19-0x000000007463E000-0x000000007463F000-memory.dmp

Filesize
4KB

Download
memory/2560-20-0x0000000074630000-0x0000000074D1E000-memory.dmp

Filesize
6.9MB

Download