dcrat | 5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
12-12-2024 14:09

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General

Target

5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe
Size

1.3MB
MD5

a8c535490feb18fdff588d94c0d8a889
SHA1

7e8660d2481014bdf84814273573b921202c67e6
SHA256

5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b
SHA512

d858372eb3f87af450b33ecbbb989b97a11dfc4cfd0ae7aee612b43b015b1ff23a2fabcccd0f751fdd78278549a623a895efebcc50964155c15aa1f1e56191dc
SSDEEP

24576:4sQst5PapBfSRvZ2acs9504+O4cgjqOM0JrK1PxNhiFlGHDTyoy9mX5BifNpttmw:4CZ8WOs50Z3NjnM0J4DhiHIDW9mXyfNt

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
behavioral2/files/0x0007000000023c97-22.dat	family_dcrat_v2
behavioral2/memory/3816-27-0x0000000000400000-0x00000000004E6000-memory.dmp	family_dcrat_v2
behavioral2/memory/4964-31-0x0000000000150000-0x0000000000200000-memory.dmp	family_dcrat_v2

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	SiU6dGwbZJ.exe
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe

Executes dropped EXE 3 IoCs

pid	Process
112	JaJA9gX4t4.exe
4964	SiU6dGwbZJ.exe
424	unsecapp.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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3408 set thread context of 3816	3408	5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe	97

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Microsoft Office 15\ClientX64\unsecapp.exe	SiU6dGwbZJ.exe
File created	C:\Program Files\Microsoft Office 15\ClientX64\29c1c3cc0f7685	SiU6dGwbZJ.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Media\Cityscape\RuntimeBroker.exe	SiU6dGwbZJ.exe
File created	C:\Windows\Media\Cityscape\9e8d7a4ca61bd9	SiU6dGwbZJ.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2300	3408	WerFault.exe	82

System Location Discovery: System Language Discovery 1 TTPs 2 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	5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000_Classes\Local Settings	SiU6dGwbZJ.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
4964	SiU6dGwbZJ.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe
424	unsecapp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4964	SiU6dGwbZJ.exe
Token: SeDebugPrivilege	424	unsecapp.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 3408 wrote to memory of 3816	3408	5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe	97
PID 3408 wrote to memory of 3816	3408	5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe	97
PID 3408 wrote to memory of 3816	3408	5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe	97
PID 3408 wrote to memory of 3816	3408	5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe	97
PID 3408 wrote to memory of 3816	3408	5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe	97
PID 3408 wrote to memory of 3816	3408	5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe	97
PID 3408 wrote to memory of 3816	3408	5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe	97
PID 3408 wrote to memory of 3816	3408	5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe	97
PID 3408 wrote to memory of 3816	3408	5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe	97
PID 3408 wrote to memory of 3816	3408	5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe	97
PID 3816 wrote to memory of 112	3816	5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe	102
PID 3816 wrote to memory of 112	3816	5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe	102
PID 3816 wrote to memory of 4964	3816	5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe	104
PID 3816 wrote to memory of 4964	3816	5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe	104
PID 4964 wrote to memory of 2156	4964	SiU6dGwbZJ.exe	105
PID 4964 wrote to memory of 2156	4964	SiU6dGwbZJ.exe	105
PID 2156 wrote to memory of 1008	2156	cmd.exe	107
PID 2156 wrote to memory of 1008	2156	cmd.exe	107
PID 2156 wrote to memory of 1424	2156	cmd.exe	108
PID 2156 wrote to memory of 1424	2156	cmd.exe	108
PID 2156 wrote to memory of 424	2156	cmd.exe	110
PID 2156 wrote to memory of 424	2156	cmd.exe	110

C:\Users\Admin\AppData\Local\Temp\5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe
"C:\Users\Admin\AppData\Local\Temp\5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3408
- C:\Users\Admin\AppData\Local\Temp\5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe
  "C:\Users\Admin\AppData\Local\Temp\5f4e7c6f450d28136464acb431e1ec1be7812fc72f9eeede3b767f4e0194801b.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3816
- - C:\Users\Admin\AppData\Roaming\JaJA9gX4t4.exe
    "C:\Users\Admin\AppData\Roaming\JaJA9gX4t4.exe"
    3⤵
    - Executes dropped EXE
    PID:112
- - C:\Users\Admin\AppData\Roaming\SiU6dGwbZJ.exe
    "C:\Users\Admin\AppData\Roaming\SiU6dGwbZJ.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Drops file in Program Files directory
    - Drops file in Windows directory
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4964
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\dchwSjOYfV.bat"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2156
    - - C:\Windows\system32\chcp.com
        
        chcp 65001
        5⤵
        
        PID:1008
    - - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        5⤵
        
        PID:1424
    - - C:\Program Files\Microsoft Office 15\ClientX64\unsecapp.exe
        
        "C:\Program Files\Microsoft Office 15\ClientX64\unsecapp.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:424
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3408 -s 284
  2⤵
  - Program crash
  PID:2300

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3408 -ip 3408
1⤵
PID:820

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

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\dchwSjOYfV.bat

Filesize
235B

MD5
49f2868b8cd72db4b231406c1dfca81c

SHA1
522cafafec62d7e47ff20fb73693110a304464ed

SHA256
51ad3d30cc59a0412ab4090394fb63c7fbf2a7d7d2cb1b4bea859dbab6ead1dd

SHA512
bde029d9cfda461c4a423934786a151eb12d44ffed998ddf5fffe9c0b07a6b6685fbcbadfcd3f5c5af54fa49719f175fbfa2d8daa06020b88b52c544db33e185

Download Submit
C:\Users\Admin\AppData\Roaming\JaJA9gX4t4.exe

Filesize
18KB

MD5
f3edff85de5fd002692d54a04bcb1c09

SHA1
4c844c5b0ee7cb230c9c28290d079143e00cb216

SHA256
caf29650446db3842e1c1e8e5e1bafadaf90fc82c5c37b9e2c75a089b7476131

SHA512
531d920e2567f58e8169afc786637c1a0f7b9b5c27b27b5f0eddbfc3e00cecd7bea597e34061d836647c5f8c7757f2fe02952a9793344e21b39ddd4bf7985f9d

Download Submit
C:\Users\Admin\AppData\Roaming\SiU6dGwbZJ.exe

Filesize
675KB

MD5
314420bac969bcfb9510a0e8cc3686d6

SHA1
66f1d0a60a2727970476a105c88883f37270e30f

SHA256
38b9cc3ccae02c270e3d62e62e3b3b40e90ad7f898372b8a5035445ba32f4b26

SHA512
debf908add95aa0849451aef830e5e71724247d352dcb5dad6b02dca0d54e4e915a9430de80d970a4e7ef3749eb2fc7c6fa7839348d84f546d5934d713e7569c

Download Submit
memory/3408-0-0x0000000000E83000-0x0000000000E84000-memory.dmp

Filesize
4KB

Download
memory/3816-32-0x0000000000E20000-0x0000000000F6C000-memory.dmp

Filesize
1.3MB

Download
memory/3816-1-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/3816-4-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/3816-5-0x0000000000E20000-0x0000000000F6C000-memory.dmp

Filesize
1.3MB

Download
memory/3816-2-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/3816-3-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/3816-27-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/4964-31-0x0000000000150000-0x0000000000200000-memory.dmp

Filesize
704KB

Download
memory/4964-33-0x00007FF9E1C40000-0x00007FF9E2701000-memory.dmp

Filesize
10.8MB

Download
memory/4964-35-0x000000001B700000-0x000000001B71C000-memory.dmp

Filesize
112KB

Download
memory/4964-36-0x000000001B770000-0x000000001B7C0000-memory.dmp

Filesize
320KB

Download
memory/4964-39-0x000000001B720000-0x000000001B738000-memory.dmp

Filesize
96KB

Download
memory/4964-37-0x00007FF9E1C40000-0x00007FF9E2701000-memory.dmp

Filesize
10.8MB

Download
memory/4964-42-0x00007FF9E1C40000-0x00007FF9E2701000-memory.dmp

Filesize
10.8MB

Download
memory/4964-51-0x00007FF9E1C40000-0x00007FF9E2701000-memory.dmp

Filesize
10.8MB

Download
memory/4964-30-0x00007FF9E1C43000-0x00007FF9E1C45000-memory.dmp

Filesize
8KB

Download
memory/4964-57-0x00007FF9E1C40000-0x00007FF9E2701000-memory.dmp

Filesize
10.8MB

Download