darkvnc | 7e3b21ad9998cf8cb40f6471307c42d81f7ade43d52db956205cb251e3ba2579

General

Target

usfive_20210808-184641.exe
Size

512KB
MD5

f61ebb45ff423851fc48133bbcf49a83
SHA1

71ac9fe46382fff620ffccb01d13c91233519f31
SHA256

7e3b21ad9998cf8cb40f6471307c42d81f7ade43d52db956205cb251e3ba2579
SHA512

07444eb698d93411cf289a5154b9989f3960bedbaf114d4325fb7217222ce9634691d5b4f9549ca4d77a5ecaf1e91ff152278b7cc5236476bd3680de1e7b64e6

Score

10^/10

darkvnc raccoon c58b0b3f1f90ad7552aaf8e84180b7580f397001 discovery rat spyware stealer

Malware Config

Extracted

Family

raccoon

Botnet

c58b0b3f1f90ad7552aaf8e84180b7580f397001

Attributes

url4cnc
https://telete.in/h_electricryptors2

rc4.plain

Signatures

DarkVNC
DarkVNC is a malicious version of the famous VNC software.
rat darkvnc
Raccoon
Simple but powerful infostealer which was very active in 2019.
stealer raccoon

Raccoon Stealer Payload 2 IoCs

resource	yara_rule
behavioral2/memory/652-114-0x0000000004A60000-0x0000000004AF3000-memory.dmp	family_raccoon
behavioral2/memory/652-115-0x0000000000400000-0x0000000002CB6000-memory.dmp	family_raccoon

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 3876 created 3180	3876	WerFault.exe	77

DarkVNC Payload 3 IoCs

rat

resource	yara_rule
behavioral2/memory/3180-127-0x00000000048D0000-0x0000000004958000-memory.dmp	darkvnc
behavioral2/memory/3180-129-0x0000000000400000-0x0000000002CA6000-memory.dmp	darkvnc
behavioral2/memory/816-131-0x0000020855390000-0x000002085545A000-memory.dmp	darkvnc

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
3180	6aFJzad59i.exe

Loads dropped DLL 6 IoCs

pid	Process
652	usfive_20210808-184641.exe
652	usfive_20210808-184641.exe
652	usfive_20210808-184641.exe
652	usfive_20210808-184641.exe
652	usfive_20210808-184641.exe
652	usfive_20210808-184641.exe

Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
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
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3180 set thread context of 816	3180	6aFJzad59i.exe	82

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3876	3180	WerFault.exe	77

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1424	timeout.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
3876	WerFault.exe
3876	WerFault.exe
3876	WerFault.exe
3876	WerFault.exe
3876	WerFault.exe
3876	WerFault.exe
3876	WerFault.exe
3876	WerFault.exe
3876	WerFault.exe
3876	WerFault.exe
3876	WerFault.exe
3876	WerFault.exe
3876	WerFault.exe
3876	WerFault.exe
3876	WerFault.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3180	6aFJzad59i.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	3876	WerFault.exe
Token: SeBackupPrivilege	3876	WerFault.exe
Token: SeDebugPrivilege	3876	WerFault.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 652 wrote to memory of 3180	652	usfive_20210808-184641.exe	77
PID 652 wrote to memory of 3180	652	usfive_20210808-184641.exe	77
PID 652 wrote to memory of 3180	652	usfive_20210808-184641.exe	77
PID 652 wrote to memory of 3084	652	usfive_20210808-184641.exe	78
PID 652 wrote to memory of 3084	652	usfive_20210808-184641.exe	78
PID 652 wrote to memory of 3084	652	usfive_20210808-184641.exe	78
PID 3084 wrote to memory of 1424	3084	cmd.exe	80
PID 3084 wrote to memory of 1424	3084	cmd.exe	80
PID 3084 wrote to memory of 1424	3084	cmd.exe	80
PID 3180 wrote to memory of 816	3180	6aFJzad59i.exe	82
PID 3180 wrote to memory of 816	3180	6aFJzad59i.exe	82
PID 3180 wrote to memory of 816	3180	6aFJzad59i.exe	82
PID 3180 wrote to memory of 816	3180	6aFJzad59i.exe	82
PID 3180 wrote to memory of 816	3180	6aFJzad59i.exe	82

C:\Users\Admin\AppData\Local\Temp\usfive_20210808-184641.exe
"C:\Users\Admin\AppData\Local\Temp\usfive_20210808-184641.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:652
- C:\Users\Admin\AppData\Local\Temp\6aFJzad59i.exe
  "C:\Users\Admin\AppData\Local\Temp\6aFJzad59i.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:3180
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe
    3⤵
    PID:816
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3180 -s 484
    3⤵
    - Suspicious use of NtCreateProcessExOtherParentProcess
    - Program crash
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3876
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /C timeout /T 10 /NOBREAK > Nul & Del /f /q "C:\Users\Admin\AppData\Local\Temp\usfive_20210808-184641.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3084
- - C:\Windows\SysWOW64\timeout.exe
    timeout /T 10 /NOBREAK
    3⤵
    - Delays execution with timeout.exe
    PID:1424

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/652-115-0x0000000000400000-0x0000000002CB6000-memory.dmp

Filesize
40.7MB

Download
memory/652-114-0x0000000004A60000-0x0000000004AF3000-memory.dmp

Filesize
588KB

Download
memory/816-131-0x0000020855390000-0x000002085545A000-memory.dmp

Filesize
808KB

Download
memory/816-130-0x0000020855120000-0x0000020855149000-memory.dmp

Filesize
164KB

Download
memory/3180-127-0x00000000048D0000-0x0000000004958000-memory.dmp

Filesize
544KB

Download
memory/3180-129-0x0000000000400000-0x0000000002CA6000-memory.dmp

Filesize
40.6MB

Download

Analysis

Sharing