dcrat | a6429d9778a93254c7387cf588619a2635ed97108558a122de885aad25a57eb7

Analysis

max time kernel
146s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07-12-2024 17:56

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General

Target

a6429d9778a93254c7387cf588619a2635ed97108558a122de885aad25a57eb7.exe
Size

2.1MB
MD5

6261ec3f13e1cc6ae25ee8942db137b0
SHA1

20629ed3f752869dc4980827291bf3064333405f
SHA256

a6429d9778a93254c7387cf588619a2635ed97108558a122de885aad25a57eb7
SHA512

ed292a77db5e9926cbaa247e449a4019776b2452d2e8cdadfcea4c3d7551372793b2a1125b44cfd5106d2b03ff178041d413750ee81bfc42d7a3252a934b51f1
SSDEEP

24576:2TbBv5rUyXVpz/IPMofzXxgF5X1u1seTK44vmrUcSgjBYsRX8TGxj4fY3D5K7Tqb:IBJp0PbsCk44v0y4BYgAGxrNKvdVT6

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

Process spawned unexpected child process 18 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3356	3452	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2940	3452	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4076	3452	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2880	3452	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1660	3452	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2648	3452	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2280	3452	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	856	3452	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4956	3452	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4664	3452	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3612	3452	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2752	3452	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3960	3452	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2044	3452	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2660	3452	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4768	3452	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3944	3452	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3536	3452	schtasks.exe	88

Checks computer location settings 2 TTPs 3 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	a6429d9778a93254c7387cf588619a2635ed97108558a122de885aad25a57eb7.exe
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	Winver.exe

Executes dropped EXE 2 IoCs

pid	Process
60	Winver.exe
4112	upfc.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 2 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\de-DE\sysmon.exe	Winver.exe
File created	C:\Program Files\Common Files\System\de-DE\121e5b5079f7c0	Winver.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	a6429d9778a93254c7387cf588619a2635ed97108558a122de885aad25a57eb7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000_Classes\Local Settings	a6429d9778a93254c7387cf588619a2635ed97108558a122de885aad25a57eb7.exe
Key created	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000_Classes\Local Settings	Winver.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 18 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2880	schtasks.exe
2280	schtasks.exe
3960	schtasks.exe
3944	schtasks.exe
2940	schtasks.exe
2648	schtasks.exe
4664	schtasks.exe
2752	schtasks.exe
2660	schtasks.exe
3536	schtasks.exe
4076	schtasks.exe
1660	schtasks.exe
856	schtasks.exe
4956	schtasks.exe
3356	schtasks.exe
3612	schtasks.exe
2044	schtasks.exe
4768	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe
60	Winver.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	60	Winver.exe
Token: SeDebugPrivilege	4112	upfc.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3180 wrote to memory of 3068	3180	a6429d9778a93254c7387cf588619a2635ed97108558a122de885aad25a57eb7.exe	83
PID 3180 wrote to memory of 3068	3180	a6429d9778a93254c7387cf588619a2635ed97108558a122de885aad25a57eb7.exe	83
PID 3180 wrote to memory of 3068	3180	a6429d9778a93254c7387cf588619a2635ed97108558a122de885aad25a57eb7.exe	83
PID 3068 wrote to memory of 3652	3068	WScript.exe	85
PID 3068 wrote to memory of 3652	3068	WScript.exe	85
PID 3068 wrote to memory of 3652	3068	WScript.exe	85
PID 3652 wrote to memory of 60	3652	cmd.exe	87
PID 3652 wrote to memory of 60	3652	cmd.exe	87
PID 60 wrote to memory of 1492	60	Winver.exe	108
PID 60 wrote to memory of 1492	60	Winver.exe	108
PID 1492 wrote to memory of 3300	1492	cmd.exe	110
PID 1492 wrote to memory of 3300	1492	cmd.exe	110
PID 1492 wrote to memory of 1116	1492	cmd.exe	111
PID 1492 wrote to memory of 1116	1492	cmd.exe	111
PID 1492 wrote to memory of 4112	1492	cmd.exe	113
PID 1492 wrote to memory of 4112	1492	cmd.exe	113

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\a6429d9778a93254c7387cf588619a2635ed97108558a122de885aad25a57eb7.exe
"C:\Users\Admin\AppData\Local\Temp\a6429d9778a93254c7387cf588619a2635ed97108558a122de885aad25a57eb7.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3180
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\ESD\UST9UxLQoHNIIFaYLHo0xhIRlgCNcLzoLb106m2nL.vbe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3068
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\ESD\bQzfgHSGdt2kLcLlkun74cHPltHDXr5Sp886hMeTP.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3652
  - - C:\ESD\Winver.exe
      "C:\ESD/Winver.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Drops file in Program Files directory
      Modifies registry class
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:60
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\8KVAeeAZSM.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1492
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:3300
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:1116
      - C:\Users\Admin\Start Menu\upfc.exe
        
        "C:\Users\Admin\Start Menu\upfc.exe"
        6⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:4112

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 11 /tr "'C:\Users\Admin\Start Menu\upfc.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3356

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Users\Admin\Start Menu\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2940

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 14 /tr "'C:\Users\Admin\Start Menu\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4076

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 12 /tr "'C:\Users\Default\Desktop\unsecapp.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2880

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Users\Default\Desktop\unsecapp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1660

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 10 /tr "'C:\Users\Default\Desktop\unsecapp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2648

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 11 /tr "'C:\Program Files\Common Files\System\de-DE\sysmon.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2280

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Program Files\Common Files\System\de-DE\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:856

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 5 /tr "'C:\Program Files\Common Files\System\de-DE\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4956

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 8 /tr "'C:\ESD\fontdrvhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4664

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\ESD\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3612

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 14 /tr "'C:\ESD\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2752

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 12 /tr "'C:\Users\Default User\SppExtComObj.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3960

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Users\Default User\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2044

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 6 /tr "'C:\Users\Default User\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2660

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WinverW" /sc MINUTE /mo 11 /tr "'C:\ESD\Winver.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4768

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Winver" /sc ONLOGON /tr "'C:\ESD\Winver.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3944

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WinverW" /sc MINUTE /mo 10 /tr "'C:\ESD\Winver.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3536

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

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

Replay Monitor

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Downloads

C:\ESD\UST9UxLQoHNIIFaYLHo0xhIRlgCNcLzoLb106m2nL.vbe

Filesize
222B

MD5
8decf43a92645d8ba4b81696c5e7b1ae

SHA1
dcc9ca8b24e3adf7568eb0f6b7f5cd27f039faf6

SHA256
6ad34bd4e803fad802052423aeab64f4c60dd3ee55a3167425b9640ae24bfea1

SHA512
72e44773f484d2e69ebd41cc555d9a57c833b3930e1f3b0326c90882035e0dc5fb54e8d4ded22cf9f2d28fb502b37b133b7c1c9f9d89b8c21857b569c51ebc17

Download Submit
C:\ESD\Winver.exe

Filesize
1.8MB

MD5
d9ce1032fee5365065a78bbff7267883

SHA1
4c7471b47d4151908dd204303421d7c64cf4c5c6

SHA256
65d26e7c0b856832e88efefe5c2a9e767fb2a7345715bbd0a6e10f9ac2afb520

SHA512
0455364fa91c07da6fecbfb3e3fdbbbcb909e3176b5b151e3653f8b8ebffc02e14fb3471245df479b83f90cd2e1142bcff82b80555cfb3df113696b2925d9435

Download Submit
C:\ESD\bQzfgHSGdt2kLcLlkun74cHPltHDXr5Sp886hMeTP.bat

Filesize
57B

MD5
d1a4f1e326e7dfca62327ea69446dc7c

SHA1
253e264c90cbd15836d8c3a1eab3c26756d94047

SHA256
ea091556a5dbab314a6029817a9db64f9b8adc7afb476bbbb11aec0c227f0de2

SHA512
3d4624c169297b50329a4e13f3f559a7a1f02112f6482e45cfba747dad11c6e6642f1411cec5e92d7890f86fb38702f48c75fec4d24332d43484ad7b9dbf29c8

Download Submit
C:\Users\Admin\AppData\Local\Temp\8KVAeeAZSM.bat

Filesize
210B

MD5
ab4a2709001e550e56386bc6cea0b2bc

SHA1
1aa3345904d64a32fb67547e1ba04f3dc998aef8

SHA256
963f99a13594f857e350be666f86de4eddc5c2ce1ca8d8ba9458ccd1d35179ae

SHA512
392f567dd83c80be0a3b72a3e9a1d9366ea28400d500c930b6cb9d633a9da86e028079563ac88eaefb0f13b51e3fdbb727995a45f5ca0760d4a1bcbc92076015

Download Submit
memory/60-12-0x00007FFC27A33000-0x00007FFC27A35000-memory.dmp

Filesize
8KB

Download
memory/60-13-0x00000000002F0000-0x00000000004C4000-memory.dmp

Filesize
1.8MB

Download
memory/60-15-0x0000000000D40000-0x0000000000D4E000-memory.dmp

Filesize
56KB

Download
memory/60-17-0x000000001B010000-0x000000001B02C000-memory.dmp

Filesize
112KB

Download
memory/60-18-0x000000001B080000-0x000000001B0D0000-memory.dmp

Filesize
320KB

Download
memory/60-20-0x000000001B030000-0x000000001B048000-memory.dmp

Filesize
96KB

Download
memory/4112-44-0x000000001D540000-0x000000001D655000-memory.dmp

Filesize
1.1MB

Download