dcrat | 532b46d98ca73deb0d04d76e228b8fb842e235e5fcc3aecb7610648baa38eb38

General

Target

2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6.exe
Size

1.4MB
MD5

8645fd54fac7c386197853edb3e2cd8a
SHA1

69eba481f214340e8e770e0f9fb4dab65afcd781
SHA256

2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6
SHA512

9ed245b14d6049c8be54d19f4b4be33eb1e43d4a32111242de661f690aec03284a38ee3630fdfd1d4ba924ec0928dfdf6fdce803fe82b35efcfbe68e89358bca
SSDEEP

24576:8kGAQ2YTEip1A1+dNOL0RCcJNWDKmj8Tc6dhtN3fucovGLPqhmr5ptQBodIF/pGz:8kGAQ61+dkL0y6dhHfucovgPEmr5pGBa

Score

10^/10

dcrat infostealer rat

Malware Config

Signatures

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

DCRat payload 4 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
behavioral1/memory/1920-56-0x00000000000E0000-0x00000000001FA000-memory.dmp	dcrat
behavioral1/memory/1920-61-0x00000000001F451E-mapping.dmp	dcrat
behavioral1/memory/1920-62-0x00000000000E0000-0x00000000001FA000-memory.dmp	dcrat
behavioral1/memory/1920-63-0x00000000000E0000-0x00000000001FA000-memory.dmp	dcrat

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Suspicious use of SetThreadContext 1 IoCs

Processes:

2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6.exe

description	pid	process	target process
PID 1312 set thread context of 1920	1312	2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6.exe	vbc.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

988 1312 WerFault.exe 2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6.exe
Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

vbc.exe

pid process

1920 vbc.exe
1920 vbc.exe
1920 vbc.exe
1920 vbc.exe
1920 vbc.exe
1920 vbc.exe
1920 vbc.exe
1920 vbc.exe
1920 vbc.exe
1920 vbc.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

vbc.exe

pid process

1920 vbc.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

vbc.exe

description pid process

Token: SeDebugPrivilege 1920 vbc.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

1920 vbc.exe

pid	pid_target	process	target process
988	1312	WerFault.exe	2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6.exe

pid	process
1920	vbc.exe
1920	vbc.exe
1920	vbc.exe
1920	vbc.exe
1920	vbc.exe
1920	vbc.exe
1920	vbc.exe
1920	vbc.exe
1920	vbc.exe
1920	vbc.exe

pid	process
1920	vbc.exe

description	pid	process
Token: SeDebugPrivilege	1920	vbc.exe

pid	process
1920	vbc.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6.exevbc.exe

description	pid	process	target process
PID 1312 wrote to memory of 1920	1312	2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6.exe	vbc.exe
PID 1312 wrote to memory of 1920	1312	2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6.exe	vbc.exe
PID 1312 wrote to memory of 1920	1312	2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6.exe	vbc.exe
PID 1312 wrote to memory of 1920	1312	2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6.exe	vbc.exe
PID 1312 wrote to memory of 1920	1312	2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6.exe	vbc.exe
PID 1312 wrote to memory of 1920	1312	2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6.exe	vbc.exe
PID 1312 wrote to memory of 988	1312	2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6.exe	WerFault.exe
PID 1312 wrote to memory of 988	1312	2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6.exe	WerFault.exe
PID 1312 wrote to memory of 988	1312	2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6.exe	WerFault.exe
PID 1312 wrote to memory of 988	1312	2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6.exe	WerFault.exe
PID 1920 wrote to memory of 1068	1920	vbc.exe	WScript.exe
PID 1920 wrote to memory of 1068	1920	vbc.exe	WScript.exe
PID 1920 wrote to memory of 1068	1920	vbc.exe	WScript.exe
PID 1920 wrote to memory of 1068	1920	vbc.exe	WScript.exe
PID 1920 wrote to memory of 1248	1920	vbc.exe	WScript.exe
PID 1920 wrote to memory of 1248	1920	vbc.exe	WScript.exe
PID 1920 wrote to memory of 1248	1920	vbc.exe	WScript.exe
PID 1920 wrote to memory of 1248	1920	vbc.exe	WScript.exe

C:\Users\Admin\AppData\Local\Temp\2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6.exe
"C:\Users\Admin\AppData\Local\Temp\2ff5f44dd978997ba618bab8bf6ee9900aa005f244db185c98ba5cbecb6866d6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1312

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1920

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\ffddc35e-8645-4e4d-b23b-277473599190.vbs"
3⤵
PID:1068

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\502f619a-c3d9-420a-9fa3-f74e3073acd5.vbs"
3⤵
PID:1248

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1312 -s 36
2⤵
- Program crash
PID:988

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1

T1102

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\502f619a-c3d9-420a-9fa3-f74e3073acd5.vbs
Filesize
505B

MD5
dc72f53e607c78c7889e9502f865a167

SHA1
e53e5112c858020da5b3aca6ab3f30fdf5634f52

SHA256
bd8b803b4089b147b3dabdc9d026ed945bfc7113365c69d007e9080150dcc63f

SHA512
ad900ba0f84a10bbe6974cffe80d8f325a61afdaaf8be697c3ff9623a84d5b56cd9f0a4badb3f3d0162cfbe816c9d25f5541622db734c2a62ed8114b9248d89e

Download Submit
C:\Users\Admin\AppData\Local\Temp\ffddc35e-8645-4e4d-b23b-277473599190.vbs
Filesize
729B

MD5
7f67e807d50f101417f5402a3c09a41b

SHA1
0d7f90f490eb81dce30ada141d9078c169274dff

SHA256
12699672aae4b39f2f7cf8ffe07cc4017cbad92b9419628a7e139a328ae9d01b

SHA512
d7e6c87d2fe7a62b81d35c9cca7ddb40c85b4715ec711c52d99ab14ba516a41df790838edf2c0f89395258d58d7c76614f6d4f9c473a890e37a941a73f32831d

Download Submit
memory/988-64-0x0000000000000000-mapping.dmp

Download
memory/1068-76-0x0000000000000000-mapping.dmp

Download
memory/1248-77-0x0000000000000000-mapping.dmp

Download
memory/1920-69-0x0000000002120000-0x0000000002130000-memory.dmp

Filesize
64KB

Download
memory/1920-71-0x0000000002140000-0x0000000002152000-memory.dmp

Filesize
72KB

Download
memory/1920-66-0x00000000007E0000-0x00000000007EE000-memory.dmp

Filesize
56KB

Download
memory/1920-67-0x00000000020C0000-0x00000000020DC000-memory.dmp

Filesize
112KB

Download
memory/1920-68-0x00000000020F0000-0x0000000002106000-memory.dmp

Filesize
88KB

Download
memory/1920-54-0x00000000000E0000-0x00000000001FA000-memory.dmp

Filesize
1.1MB

Download
memory/1920-70-0x0000000002130000-0x000000000213C000-memory.dmp

Filesize
48KB

Download
memory/1920-65-0x0000000075531000-0x0000000075533000-memory.dmp

Filesize
8KB

Download
memory/1920-72-0x0000000002250000-0x0000000002258000-memory.dmp

Filesize
32KB

Download
memory/1920-73-0x00000000022A0000-0x00000000022AA000-memory.dmp

Filesize
40KB

Download
memory/1920-74-0x00000000022B0000-0x00000000022BE000-memory.dmp

Filesize
56KB

Download
memory/1920-75-0x00000000022C0000-0x00000000022C8000-memory.dmp

Filesize
32KB

Download
memory/1920-63-0x00000000000E0000-0x00000000001FA000-memory.dmp

Filesize
1.1MB

Download
memory/1920-62-0x00000000000E0000-0x00000000001FA000-memory.dmp

Filesize
1.1MB

Download
memory/1920-61-0x00000000001F451E-mapping.dmp

Download
memory/1920-56-0x00000000000E0000-0x00000000001FA000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads