dcrat | eb70291aebfca69fae386dfcdc209c8f9b36e135e882088c890c46308fa6df69

Analysis

max time kernel
114s
max time network
119s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22-01-2025 06:31

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General

Target

eb70291aebfca69fae386dfcdc209c8f9b36e135e882088c890c46308fa6df69N.exe
Size

2.7MB
MD5

9ce973d39537cd129e27ab0ed843c920
SHA1

a0fce68a43511da1cbd63600b8e824cf684d9617
SHA256

eb70291aebfca69fae386dfcdc209c8f9b36e135e882088c890c46308fa6df69
SHA512

20dbb88bc9d5862ede036633a8e3937f47e49321872f78706d1b5881071167ab75c08da10c9a8e03a5d747f233ff97c2b0cb8e572297c309cc1497658030f404
SSDEEP

24576:2TbBv5rUyXVnI++nluNY4Cw7sULqPyZwSxIshnWIjm7vZAjX+ez87TkQPI1Q7SGS:IBJI++n8NY+lwSx9WkiLekTk1JMrs

Score

10^/10

dcrat discovery 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 family
dcrat

DCRat payload 4 IoCs

rat

resource	yara_rule
behavioral1/files/0x0008000000019266-9.dat	family_dcrat_v2
behavioral1/memory/2564-13-0x00000000001D0000-0x000000000043E000-memory.dmp	family_dcrat_v2
behavioral1/memory/400-73-0x0000000000030000-0x000000000029E000-memory.dmp	family_dcrat_v2
behavioral1/memory/912-101-0x0000000001320000-0x000000000158E000-memory.dmp	family_dcrat_v2

Executes dropped EXE 4 IoCs

pid	Process
2564	bridgechainsurrogateserverBrowser.exe
400	sppsvc.exe
912	sppsvc.exe
2812	sppsvc.exe

Loads dropped DLL 2 IoCs

pid	Process
2532	cmd.exe
2532	cmd.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Microsoft Analysis Services\0a1fd5f707cd16	bridgechainsurrogateserverBrowser.exe
File created	C:\Program Files (x86)\Windows Media Player\it-IT\conhost.exe	bridgechainsurrogateserverBrowser.exe
File created	C:\Program Files (x86)\Windows Media Player\it-IT\088424020bedd6	bridgechainsurrogateserverBrowser.exe
File created	C:\Program Files (x86)\Microsoft Analysis Services\sppsvc.exe	bridgechainsurrogateserverBrowser.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	eb70291aebfca69fae386dfcdc209c8f9b36e135e882088c890c46308fa6df69N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 3 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1736	PING.EXE
1996	PING.EXE
236	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
236	PING.EXE
1736	PING.EXE
1996	PING.EXE

Suspicious behavior: CmdExeWriteProcessMemorySpam 3 IoCs

pid	Process
400	sppsvc.exe
912	sppsvc.exe
2812	sppsvc.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe
2564	bridgechainsurrogateserverBrowser.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2564	bridgechainsurrogateserverBrowser.exe
Token: SeDebugPrivilege	400	sppsvc.exe
Token: SeDebugPrivilege	912	sppsvc.exe
Token: SeDebugPrivilege	2812	sppsvc.exe

Suspicious use of WriteProcessMemory 54 IoCs

description	pid	Process	procid_target
PID 3052 wrote to memory of 2764	3052	eb70291aebfca69fae386dfcdc209c8f9b36e135e882088c890c46308fa6df69N.exe	31
PID 3052 wrote to memory of 2764	3052	eb70291aebfca69fae386dfcdc209c8f9b36e135e882088c890c46308fa6df69N.exe	31
PID 3052 wrote to memory of 2764	3052	eb70291aebfca69fae386dfcdc209c8f9b36e135e882088c890c46308fa6df69N.exe	31
PID 3052 wrote to memory of 2764	3052	eb70291aebfca69fae386dfcdc209c8f9b36e135e882088c890c46308fa6df69N.exe	31
PID 2764 wrote to memory of 2532	2764	WScript.exe	32
PID 2764 wrote to memory of 2532	2764	WScript.exe	32
PID 2764 wrote to memory of 2532	2764	WScript.exe	32
PID 2764 wrote to memory of 2532	2764	WScript.exe	32
PID 2532 wrote to memory of 2564	2532	cmd.exe	34
PID 2532 wrote to memory of 2564	2532	cmd.exe	34
PID 2532 wrote to memory of 2564	2532	cmd.exe	34
PID 2532 wrote to memory of 2564	2532	cmd.exe	34
PID 2564 wrote to memory of 1492	2564	bridgechainsurrogateserverBrowser.exe	35
PID 2564 wrote to memory of 1492	2564	bridgechainsurrogateserverBrowser.exe	35
PID 2564 wrote to memory of 1492	2564	bridgechainsurrogateserverBrowser.exe	35
PID 1492 wrote to memory of 1764	1492	cmd.exe	37
PID 1492 wrote to memory of 1764	1492	cmd.exe	37
PID 1492 wrote to memory of 1764	1492	cmd.exe	37
PID 1492 wrote to memory of 236	1492	cmd.exe	38
PID 1492 wrote to memory of 236	1492	cmd.exe	38
PID 1492 wrote to memory of 236	1492	cmd.exe	38
PID 1492 wrote to memory of 400	1492	cmd.exe	39
PID 1492 wrote to memory of 400	1492	cmd.exe	39
PID 1492 wrote to memory of 400	1492	cmd.exe	39
PID 1492 wrote to memory of 400	1492	cmd.exe	39
PID 1492 wrote to memory of 400	1492	cmd.exe	39
PID 400 wrote to memory of 448	400	sppsvc.exe	41
PID 400 wrote to memory of 448	400	sppsvc.exe	41
PID 400 wrote to memory of 448	400	sppsvc.exe	41
PID 448 wrote to memory of 2112	448	cmd.exe	43
PID 448 wrote to memory of 2112	448	cmd.exe	43
PID 448 wrote to memory of 2112	448	cmd.exe	43
PID 448 wrote to memory of 1736	448	cmd.exe	44
PID 448 wrote to memory of 1736	448	cmd.exe	44
PID 448 wrote to memory of 1736	448	cmd.exe	44
PID 448 wrote to memory of 912	448	cmd.exe	45
PID 448 wrote to memory of 912	448	cmd.exe	45
PID 448 wrote to memory of 912	448	cmd.exe	45
PID 448 wrote to memory of 912	448	cmd.exe	45
PID 448 wrote to memory of 912	448	cmd.exe	45
PID 912 wrote to memory of 1032	912	sppsvc.exe	47
PID 912 wrote to memory of 1032	912	sppsvc.exe	47
PID 912 wrote to memory of 1032	912	sppsvc.exe	47
PID 1032 wrote to memory of 2784	1032	cmd.exe	49
PID 1032 wrote to memory of 2784	1032	cmd.exe	49
PID 1032 wrote to memory of 2784	1032	cmd.exe	49
PID 1032 wrote to memory of 1996	1032	cmd.exe	50
PID 1032 wrote to memory of 1996	1032	cmd.exe	50
PID 1032 wrote to memory of 1996	1032	cmd.exe	50
PID 1032 wrote to memory of 2812	1032	cmd.exe	51
PID 1032 wrote to memory of 2812	1032	cmd.exe	51
PID 1032 wrote to memory of 2812	1032	cmd.exe	51
PID 1032 wrote to memory of 2812	1032	cmd.exe	51
PID 1032 wrote to memory of 2812	1032	cmd.exe	51

C:\Users\Admin\AppData\Local\Temp\eb70291aebfca69fae386dfcdc209c8f9b36e135e882088c890c46308fa6df69N.exe
"C:\Users\Admin\AppData\Local\Temp\eb70291aebfca69fae386dfcdc209c8f9b36e135e882088c890c46308fa6df69N.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3052
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Blockmonitor\HeUwcB4baJ09hxtgLFYnrYRurWpCBdRotBlDKLgEXR4j0GQXLf0GLW.vbe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2764
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Blockmonitor\i2PbrgOOwQRRChofjSNVXl67BG60nzl0wUfDSUyfdly0UjRL.bat" "
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2532
  - - C:\Blockmonitor\bridgechainsurrogateserverBrowser.exe
      "C:\Blockmonitor/bridgechainsurrogateserverBrowser.exe"
      4⤵
      Executes dropped EXE
      Drops file in Program Files directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2564
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\zEYVC2l170.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1492
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:1764
      - C:\Windows\system32\PING.EXE
        
        ping -n 10 localhost
        6⤵
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:236
      - C:\Users\Default\Saved Games\sppsvc.exe
        
        "C:\Users\Default\Saved Games\sppsvc.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: CmdExeWriteProcessMemorySpam
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:400
        
        C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\Ng14EOm2tp.bat"
        7⤵
        Suspicious use of WriteProcessMemory
        
        PID:448
        
        C:\Windows\system32\chcp.com
        
        chcp 65001
        8⤵
        
        PID:2112
        
        C:\Windows\system32\PING.EXE
        
        ping -n 10 localhost
        8⤵
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:1736
        
        C:\Users\Default\Saved Games\sppsvc.exe
        
        "C:\Users\Default\Saved Games\sppsvc.exe"
        8⤵
        Executes dropped EXE
        Suspicious behavior: CmdExeWriteProcessMemorySpam
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:912
        
        C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\MGTgtuIFSm.bat"
        9⤵
        Suspicious use of WriteProcessMemory
        
        PID:1032
        
        C:\Windows\system32\chcp.com
        
        chcp 65001
        10⤵
        
        PID:2784
        
        C:\Windows\system32\PING.EXE
        
        ping -n 10 localhost
        10⤵
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:1996
        
        C:\Users\Default\Saved Games\sppsvc.exe
        
        "C:\Users\Default\Saved Games\sppsvc.exe"
        10⤵
        Executes dropped EXE
        Suspicious behavior: CmdExeWriteProcessMemorySpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:2812

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Blockmonitor\HeUwcB4baJ09hxtgLFYnrYRurWpCBdRotBlDKLgEXR4j0GQXLf0GLW.vbe

Filesize
239B

MD5
3e63707e4d8b55019daddbf38b91a5aa

SHA1
8079c688efbac523116d6466faf7364a7a3eeeeb

SHA256
707f7fdea6e382b7df65eb229634645d2bf48b37485381e78061e117c85d1d21

SHA512
b0004124ed88fe3a13247787bfbd82a9b8b545902d2c36c688270a357e7cae0259d2fcff028fc04b4270c1ef6e85b65cffc903ccb8d90173b13d92188dbcade7

Download Submit
C:\Blockmonitor\i2PbrgOOwQRRChofjSNVXl67BG60nzl0wUfDSUyfdly0UjRL.bat

Filesize
104B

MD5
267273f89b4dfe0e94294134e8cdd20e

SHA1
530eba1aacce08a71715c0c5ebf1e7312fbf9274

SHA256
d2aea7c169666ee3c82d1c366030c1a2264142941f0693ba3a79acaca46b48f9

SHA512
da167fab4faf015416b42ddc45de43e3779dca6523f96624df2ce6e5073024e5365c33dbf641da25219ba9957a328e1a8f742453b3ce6af790d642d440a0d5d5

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

Filesize
167B

MD5
c7cb0405464b554f573bf6812a256b9c

SHA1
703965eca49d791f9b1b134002667f7eca0961fd

SHA256
1d3507c15b3c0df8552169a99dcf89eb41b8c7888b46169062e3c7d452430526

SHA512
a739b1e443fa0c9d4769308b956456c5730bb78d862c62bb00fc596761f83e5b5b97d89cba3a3d585d5cba336d875f1f2d970e52093bc08eadb772fc4ec65ad5

Download Submit
C:\Users\Admin\AppData\Local\Temp\Ng14EOm2tp.bat

Filesize
167B

MD5
650b185d7802565999642f5f383beb63

SHA1
efa35bb320e1c3b6b97467178eb7b4a395109107

SHA256
30c4763afb0bb4ac5a0c5ba9e5ec5d378c9cd0c9570e80910c9f1b47779d311e

SHA512
7847c5840778e375425a90bcd65e61d30dee42e1981bea460c78de1c456586e5c5101c2f6ee99cb2f0ee6dfc2af932a8d9f3535e19dad870a6197d2db37b7c9a

Download Submit
C:\Users\Admin\AppData\Local\Temp\zEYVC2l170.bat

Filesize
167B

MD5
60f942676572a2466af3d025719e42ef

SHA1
6654b1c5ccc7cfa5a77215d9c7a8a425aefba0ea

SHA256
fa513769c082fd14c9720d25e440c70f296f95a48fc9d065b02fa5fc18e05a29

SHA512
d7d6c67e8660c6dc4f4b1d83e1bda8d990cd98f85c0807b41f65d723ded2225ad906f04bb8fe02d0754b4254686985f04636c87fe46b3bf5cdd4e2dd804de449

Download Submit
\Blockmonitor\bridgechainsurrogateserverBrowser.exe

Filesize
2.4MB

MD5
90ec39d1b525bd236ffbe02fac42f53d

SHA1
0c7d6ec16d26546a13ba98daef26c20eaee9e35f

SHA256
df2bc338a5f3ade391666a46efa5bc59d0bf88fe224bb7c9a79f934a155cad10

SHA512
e9acf468d7782cfbc4334aa4689cbb7d5aedadb2c3f06ae2e3d6a49c7691a53761d4fd1e1348299dad60b105c63f2c8a122336c12067f411f19768cfd2f97374

Download Submit
memory/400-73-0x0000000000030000-0x000000000029E000-memory.dmp

Filesize
2.4MB

Download
memory/912-101-0x0000000001320000-0x000000000158E000-memory.dmp

Filesize
2.4MB

Download
memory/2564-35-0x0000000002140000-0x0000000002156000-memory.dmp

Filesize
88KB

Download
memory/2564-45-0x00000000022A0000-0x00000000022FA000-memory.dmp

Filesize
360KB

Download
memory/2564-27-0x00000000008F0000-0x0000000000900000-memory.dmp

Filesize
64KB

Download
memory/2564-29-0x0000000000900000-0x000000000090E000-memory.dmp

Filesize
56KB

Download
memory/2564-31-0x0000000000960000-0x0000000000972000-memory.dmp

Filesize
72KB

Download
memory/2564-33-0x0000000000940000-0x0000000000950000-memory.dmp

Filesize
64KB

Download
memory/2564-23-0x0000000000910000-0x0000000000928000-memory.dmp

Filesize
96KB

Download
memory/2564-37-0x0000000002160000-0x0000000002172000-memory.dmp

Filesize
72KB

Download
memory/2564-39-0x0000000000950000-0x000000000095E000-memory.dmp

Filesize
56KB

Download
memory/2564-41-0x0000000002120000-0x0000000002130000-memory.dmp

Filesize
64KB

Download
memory/2564-43-0x0000000002130000-0x0000000002140000-memory.dmp

Filesize
64KB

Download
memory/2564-25-0x0000000000780000-0x0000000000790000-memory.dmp

Filesize
64KB

Download
memory/2564-47-0x0000000002180000-0x000000000218E000-memory.dmp

Filesize
56KB

Download
memory/2564-49-0x0000000002190000-0x00000000021A0000-memory.dmp

Filesize
64KB

Download
memory/2564-51-0x00000000021A0000-0x00000000021AE000-memory.dmp

Filesize
56KB

Download
memory/2564-53-0x00000000021D0000-0x00000000021E8000-memory.dmp

Filesize
96KB

Download
memory/2564-55-0x000000001A990000-0x000000001A9DE000-memory.dmp

Filesize
312KB

Download
memory/2564-21-0x0000000000770000-0x0000000000780000-memory.dmp

Filesize
64KB

Download
memory/2564-19-0x0000000000790000-0x00000000007AC000-memory.dmp

Filesize
112KB

Download
memory/2564-17-0x0000000000760000-0x000000000076E000-memory.dmp

Filesize
56KB

Download
memory/2564-15-0x00000000008C0000-0x00000000008E6000-memory.dmp

Filesize
152KB

Download
memory/2564-13-0x00000000001D0000-0x000000000043E000-memory.dmp

Filesize
2.4MB

Download