chaos | 02db375475c56ba5c97f602e4c2eea8cac66e08d9a31ec7efabe35210b0d0aa1

General

Target

HEUR-Trojan-Ransom.MSIL.Agent.gen-02db375475c56ba5c97f602e4c2eea8cac66e08d9a31ec7efabe35210b0d0aa1.exe
Size

49KB
MD5

5e685c7264d47dd21ebfa36a9437d142
SHA1

0984924bd1ff568a94e16240935c03a91e7a8ddf
SHA256

02db375475c56ba5c97f602e4c2eea8cac66e08d9a31ec7efabe35210b0d0aa1
SHA512

bd7b34592aecaa4184c191159acc7724a0f393efe98673a36596ff7665e9415b49238293f187a36564287e8cfdbb7478fc1759f81a3b5d9b52c3f7e47b5cf294
SSDEEP

768:bqo2mpeWxyfr9+d4mZryx7L2ksQ1QCEez:2o2Ixyfr9+dsx32XKZz

Score

10^/10

chaos ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 4 IoCs

resource	yara_rule
behavioral1/memory/2000-54-0x0000000000D20000-0x0000000000D32000-memory.dmp	family_chaos
behavioral1/files/0x00140000000054ab-56.dat	family_chaos
behavioral1/files/0x00140000000054ab-57.dat	family_chaos
behavioral1/memory/1656-58-0x00000000009B0000-0x00000000009C2000-memory.dmp	family_chaos

Executes dropped EXE 1 IoCs

pid	Process
1656	PENTA.exe

Modifies extensions of user files 3 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\CompareEnable.png => C:\Users\Admin\Pictures\CompareEnable.png.PENTA	PENTA.exe
File renamed	C:\Users\Admin\Pictures\DismountExpand.raw => C:\Users\Admin\Pictures\DismountExpand.raw.PENTA	PENTA.exe
File renamed	C:\Users\Admin\Pictures\FindHide.raw => C:\Users\Admin\Pictures\FindHide.raw.PENTA	PENTA.exe

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PENTA.url	PENTA.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PENTA.url	PENTA.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PENTA_README.txt	PENTA.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
T1081
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2000	HEUR-Trojan-Ransom.MSIL.Agent.gen-02db375475c56ba5c97f602e4c2eea8cac66e08d9a31ec7efabe35210b0d0aa1.exe
1656	PENTA.exe
1656	PENTA.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2000	HEUR-Trojan-Ransom.MSIL.Agent.gen-02db375475c56ba5c97f602e4c2eea8cac66e08d9a31ec7efabe35210b0d0aa1.exe
Token: SeDebugPrivilege	1656	PENTA.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2000 wrote to memory of 1656	2000	HEUR-Trojan-Ransom.MSIL.Agent.gen-02db375475c56ba5c97f602e4c2eea8cac66e08d9a31ec7efabe35210b0d0aa1.exe	28
PID 2000 wrote to memory of 1656	2000	HEUR-Trojan-Ransom.MSIL.Agent.gen-02db375475c56ba5c97f602e4c2eea8cac66e08d9a31ec7efabe35210b0d0aa1.exe	28
PID 2000 wrote to memory of 1656	2000	HEUR-Trojan-Ransom.MSIL.Agent.gen-02db375475c56ba5c97f602e4c2eea8cac66e08d9a31ec7efabe35210b0d0aa1.exe	28

C:\Users\Admin\AppData\Local\Temp\HEUR-Trojan-Ransom.MSIL.Agent.gen-02db375475c56ba5c97f602e4c2eea8cac66e08d9a31ec7efabe35210b0d0aa1.exe
"C:\Users\Admin\AppData\Local\Temp\HEUR-Trojan-Ransom.MSIL.Agent.gen-02db375475c56ba5c97f602e4c2eea8cac66e08d9a31ec7efabe35210b0d0aa1.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2000
- C:\Users\Admin\AppData\Roaming\PENTA.exe
  "C:\Users\Admin\AppData\Roaming\PENTA.exe"
  2⤵
  - Executes dropped EXE
  - Modifies extensions of user files
  - Drops startup file
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1656

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
49KB

MD5
5e685c7264d47dd21ebfa36a9437d142

SHA1
0984924bd1ff568a94e16240935c03a91e7a8ddf

SHA256
02db375475c56ba5c97f602e4c2eea8cac66e08d9a31ec7efabe35210b0d0aa1

SHA512
bd7b34592aecaa4184c191159acc7724a0f393efe98673a36596ff7665e9415b49238293f187a36564287e8cfdbb7478fc1759f81a3b5d9b52c3f7e47b5cf294

Download Submit
C:\Users\Admin\AppData\Roaming\PENTA.exe

Filesize
49KB

MD5
5e685c7264d47dd21ebfa36a9437d142

SHA1
0984924bd1ff568a94e16240935c03a91e7a8ddf

SHA256
02db375475c56ba5c97f602e4c2eea8cac66e08d9a31ec7efabe35210b0d0aa1

SHA512
bd7b34592aecaa4184c191159acc7724a0f393efe98673a36596ff7665e9415b49238293f187a36564287e8cfdbb7478fc1759f81a3b5d9b52c3f7e47b5cf294

Download Submit
memory/1656-58-0x00000000009B0000-0x00000000009C2000-memory.dmp

Filesize
72KB

Download
memory/2000-54-0x0000000000D20000-0x0000000000D32000-memory.dmp

Filesize
72KB

Download

Analysis

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