dcrat | 4cb5fdd185102520c29c5975190f67567eeffaa42dc3692ee0cc9595b8a07e20

Analysis

max time kernel
119s
max time network
147s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21-12-2024 09:13

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General

Target

99209E1F30A833E0C7654FCC0AA2C9C5.exe
Size

4.7MB
MD5

99209e1f30a833e0c7654fcc0aa2c9c5
SHA1

75ac3347aae0a9dc3520ce0d31ca6ee2c7f4bbe5
SHA256

4cb5fdd185102520c29c5975190f67567eeffaa42dc3692ee0cc9595b8a07e20
SHA512

abd6cac229ffac33e6ec887e41b041c4e02a5da1a054c474549657dfda326afbfd127c435f796d2945b0eb1d9586599936d0ddae339845dd43a91610c5baaa5b
SSDEEP

12288:egY1Cj1eUAM2X3bV+rrmDl5/NJoBh3fVFycj3eI8HnR80p0C2jGJBHAfVDS3E6t1:elMednbV+rrmlzM6AOhujGJBKKE6t1

Score

10^/10

dcrat discovery infostealer rat spyware stealer

Malware Config

Signatures

DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat
Dcrat family
dcrat

DCRat payload 3 IoCs

rat

resource	yara_rule
behavioral1/memory/2896-1-0x0000000000DB0000-0x0000000000E84000-memory.dmp	family_dcrat_v2
behavioral1/files/0x0009000000015e18-24.dat	family_dcrat_v2
behavioral1/memory/2268-36-0x00000000011C0000-0x0000000001294000-memory.dmp	family_dcrat_v2

Executes dropped EXE 1 IoCs

pid	Process
2268	dwm.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Portable Devices\Idle.exe	99209E1F30A833E0C7654FCC0AA2C9C5.exe
File created	C:\Program Files\Windows Portable Devices\6ccacd8608530f	99209E1F30A833E0C7654FCC0AA2C9C5.exe
File created	C:\Program Files (x86)\Windows Mail\fr-FR\dwm.exe	99209E1F30A833E0C7654FCC0AA2C9C5.exe
File created	C:\Program Files (x86)\Windows Mail\fr-FR\6cb0b6c459d5d3	99209E1F30A833E0C7654FCC0AA2C9C5.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2400	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2400	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe
Token: SeDebugPrivilege	2268	dwm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2268	dwm.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2896 wrote to memory of 1912	2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe	28
PID 2896 wrote to memory of 1912	2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe	28
PID 2896 wrote to memory of 1912	2896	99209E1F30A833E0C7654FCC0AA2C9C5.exe	28
PID 1912 wrote to memory of 2396	1912	cmd.exe	30
PID 1912 wrote to memory of 2396	1912	cmd.exe	30
PID 1912 wrote to memory of 2396	1912	cmd.exe	30
PID 1912 wrote to memory of 2400	1912	cmd.exe	31
PID 1912 wrote to memory of 2400	1912	cmd.exe	31
PID 1912 wrote to memory of 2400	1912	cmd.exe	31
PID 1912 wrote to memory of 2268	1912	cmd.exe	32
PID 1912 wrote to memory of 2268	1912	cmd.exe	32
PID 1912 wrote to memory of 2268	1912	cmd.exe	32

C:\Users\Admin\AppData\Local\Temp\99209E1F30A833E0C7654FCC0AA2C9C5.exe
"C:\Users\Admin\AppData\Local\Temp\99209E1F30A833E0C7654FCC0AA2C9C5.exe"
1⤵
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2896
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\brv3OwcnhE.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1912
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2396
- - C:\Windows\system32\PING.EXE
    ping -n 10 localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2400
- - C:\Program Files (x86)\Windows Mail\fr-FR\dwm.exe
    "C:\Program Files (x86)\Windows Mail\fr-FR\dwm.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2268

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Browser Information Discovery

T1217

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files\Windows Portable Devices\Idle.exe

Filesize
4.7MB

MD5
99209e1f30a833e0c7654fcc0aa2c9c5

SHA1
75ac3347aae0a9dc3520ce0d31ca6ee2c7f4bbe5

SHA256
4cb5fdd185102520c29c5975190f67567eeffaa42dc3692ee0cc9595b8a07e20

SHA512
abd6cac229ffac33e6ec887e41b041c4e02a5da1a054c474549657dfda326afbfd127c435f796d2945b0eb1d9586599936d0ddae339845dd43a91610c5baaa5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\brv3OwcnhE.bat

Filesize
177B

MD5
f9987e8e98cd957a49b0f709d37d0a28

SHA1
b7025b3e1d6d541a8e88c30ffc31b57f4e66f41a

SHA256
7406715c0fa94f551b7b575b61e56a4122970ce5f09c278131a2a3b321a2e55e

SHA512
3376af7a1cd7f484a6f01970c99f45fb34a115c56adc238e41199a9102810c945f49a8dd0afa35aa9c2ea00f56f00fe4d201cb545e094163c5493590c13fd0e2

Download Submit
memory/2268-36-0x00000000011C0000-0x0000000001294000-memory.dmp

Filesize
848KB

Download
memory/2896-5-0x00000000001F0000-0x000000000020C000-memory.dmp

Filesize
112KB

Download
memory/2896-15-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

Filesize
9.9MB

Download
memory/2896-7-0x0000000000540000-0x0000000000558000-memory.dmp

Filesize
96KB

Download
memory/2896-8-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

Filesize
9.9MB

Download
memory/2896-10-0x0000000000490000-0x000000000049E000-memory.dmp

Filesize
56KB

Download
memory/2896-12-0x0000000000520000-0x000000000052C000-memory.dmp

Filesize
48KB

Download
memory/2896-14-0x0000000000B40000-0x0000000000B52000-memory.dmp

Filesize
72KB

Download
memory/2896-0-0x000007FEF5583000-0x000007FEF5584000-memory.dmp

Filesize
4KB

Download
memory/2896-25-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

Filesize
9.9MB

Download
memory/2896-4-0x0000000000310000-0x000000000032C000-memory.dmp

Filesize
112KB

Download
memory/2896-31-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

Filesize
9.9MB

Download
memory/2896-2-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

Filesize
9.9MB

Download
memory/2896-32-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

Filesize
9.9MB

Download
memory/2896-1-0x0000000000DB0000-0x0000000000E84000-memory.dmp

Filesize
848KB

Download