darkvnc | 244d3624209d79d74194422cb15ca209f957088aa1ee87a7cffadd0d6d3dfbc1

General

Target

usfive_20210809-095748.exe
Size

511KB
MD5

4be0cbe1709ca5653bcc77a22511dd46
SHA1

c4492e5cfe705f705fb08bcb3dfe0b30af408d36
SHA256

244d3624209d79d74194422cb15ca209f957088aa1ee87a7cffadd0d6d3dfbc1
SHA512

b769a084d811065e8f14fced9b8f67d7b1b8b1d557381256f9321da694724cbe3bab9621899a8987ae2429f3a919f1f47c1336d031340d77056387ef0218a790

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/2204-114-0x00000000048B0000-0x0000000004943000-memory.dmp	family_raccoon
behavioral2/memory/2204-115-0x0000000000400000-0x0000000002CB5000-memory.dmp	family_raccoon

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 3828 created 3784	3828	WerFault.exe	78

DarkVNC Payload 3 IoCs

rat

resource	yara_rule
behavioral2/memory/3784-127-0x00000000048E0000-0x0000000004968000-memory.dmp	darkvnc
behavioral2/memory/3784-129-0x0000000000400000-0x0000000002CA6000-memory.dmp	darkvnc
behavioral2/memory/4076-131-0x000002CD35220000-0x000002CD352EA000-memory.dmp	darkvnc

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
3784	FWwQTbgOjX.exe

Loads dropped DLL 6 IoCs

pid	Process
2204	usfive_20210809-095748.exe
2204	usfive_20210809-095748.exe
2204	usfive_20210809-095748.exe
2204	usfive_20210809-095748.exe
2204	usfive_20210809-095748.exe
2204	usfive_20210809-095748.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 3784 set thread context of 4076	3784	FWwQTbgOjX.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
3828	3784	WerFault.exe	78

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3192	timeout.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
3828	WerFault.exe
3828	WerFault.exe
3828	WerFault.exe
3828	WerFault.exe
3828	WerFault.exe
3828	WerFault.exe
3828	WerFault.exe
3828	WerFault.exe
3828	WerFault.exe
3828	WerFault.exe
3828	WerFault.exe
3828	WerFault.exe
3828	WerFault.exe
3828	WerFault.exe
3828	WerFault.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3784	FWwQTbgOjX.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	3828	WerFault.exe
Token: SeBackupPrivilege	3828	WerFault.exe
Token: SeDebugPrivilege	3828	WerFault.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2204 wrote to memory of 3784	2204	usfive_20210809-095748.exe	78
PID 2204 wrote to memory of 3784	2204	usfive_20210809-095748.exe	78
PID 2204 wrote to memory of 3784	2204	usfive_20210809-095748.exe	78
PID 2204 wrote to memory of 3568	2204	usfive_20210809-095748.exe	79
PID 2204 wrote to memory of 3568	2204	usfive_20210809-095748.exe	79
PID 2204 wrote to memory of 3568	2204	usfive_20210809-095748.exe	79
PID 3568 wrote to memory of 3192	3568	cmd.exe	81
PID 3568 wrote to memory of 3192	3568	cmd.exe	81
PID 3568 wrote to memory of 3192	3568	cmd.exe	81
PID 3784 wrote to memory of 4076	3784	FWwQTbgOjX.exe	82
PID 3784 wrote to memory of 4076	3784	FWwQTbgOjX.exe	82
PID 3784 wrote to memory of 4076	3784	FWwQTbgOjX.exe	82
PID 3784 wrote to memory of 4076	3784	FWwQTbgOjX.exe	82
PID 3784 wrote to memory of 4076	3784	FWwQTbgOjX.exe	82

C:\Users\Admin\AppData\Local\Temp\usfive_20210809-095748.exe
"C:\Users\Admin\AppData\Local\Temp\usfive_20210809-095748.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Users\Admin\AppData\Local\Temp\FWwQTbgOjX.exe
  "C:\Users\Admin\AppData\Local\Temp\FWwQTbgOjX.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:3784
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe
    3⤵
    PID:4076
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3784 -s 476
    3⤵
    - Suspicious use of NtCreateProcessExOtherParentProcess
    - Program crash
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3828
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /C timeout /T 10 /NOBREAK > Nul & Del /f /q "C:\Users\Admin\AppData\Local\Temp\usfive_20210809-095748.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3568
- - C:\Windows\SysWOW64\timeout.exe
    timeout /T 10 /NOBREAK
    3⤵
    - Delays execution with timeout.exe
    PID:3192

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

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Downloads

memory/2204-115-0x0000000000400000-0x0000000002CB5000-memory.dmp

Filesize
40.7MB

Download
memory/2204-114-0x00000000048B0000-0x0000000004943000-memory.dmp

Filesize
588KB

Download
memory/3784-127-0x00000000048E0000-0x0000000004968000-memory.dmp

Filesize
544KB

Download
memory/3784-129-0x0000000000400000-0x0000000002CA6000-memory.dmp

Filesize
40.6MB

Download
memory/4076-131-0x000002CD35220000-0x000002CD352EA000-memory.dmp

Filesize
808KB

Download
memory/4076-130-0x000002CD35080000-0x000002CD350A9000-memory.dmp

Filesize
164KB

Download

Analysis

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