dcrat | c4abef44de234ff0d02add4b4a79084c2e1362944059a7207e621432e395b9a5

Analysis

max time kernel
118s
max time network
126s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
17-01-2025 07:21

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General

Target

05f1f2214c8b7b660817c4849fdf5537.exe
Size

737KB
MD5

05f1f2214c8b7b660817c4849fdf5537
SHA1

6af7aeb3078376bff17f06cd4c53993b31a48475
SHA256

c4abef44de234ff0d02add4b4a79084c2e1362944059a7207e621432e395b9a5
SHA512

58f46b2840f2165d4b51cbb1d39146929587c7d95de9711e0dec11a9c44b446429a7a49bd0c68473e97cb0880f9fb80b0466c75ffccfa848b655af91689eec23
SSDEEP

12288:y+Tn9t4LxmlM9Itv2/JJMA+UpW3Ari4VVyZC0+1cqwNZ6:y+TnQmxv2BJMA+U3iE0nqY6

Score

10^/10

dcrat 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 6 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	2224	2260	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2920	2260	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2736	2260	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2692	2260	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2712	2260	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2896	2260	schtasks.exe	30

DCRat payload 3 IoCs

rat

resource	yara_rule
behavioral1/memory/2672-1-0x00000000011C0000-0x000000000127E000-memory.dmp	family_dcrat_v2
behavioral1/files/0x0006000000018731-21.dat	family_dcrat_v2
behavioral1/memory/2660-23-0x0000000000AD0000-0x0000000000B8E000-memory.dmp	family_dcrat_v2

Executes dropped EXE 1 IoCs

pid	Process
2660	csrss.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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 6 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2224	schtasks.exe
2920	schtasks.exe
2736	schtasks.exe
2692	schtasks.exe
2712	schtasks.exe
2896	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2672	05f1f2214c8b7b660817c4849fdf5537.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe
2660	csrss.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2672	05f1f2214c8b7b660817c4849fdf5537.exe
Token: SeDebugPrivilege	2660	csrss.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2672 wrote to memory of 2796	2672	05f1f2214c8b7b660817c4849fdf5537.exe	37
PID 2672 wrote to memory of 2796	2672	05f1f2214c8b7b660817c4849fdf5537.exe	37
PID 2672 wrote to memory of 2796	2672	05f1f2214c8b7b660817c4849fdf5537.exe	37
PID 2796 wrote to memory of 2752	2796	cmd.exe	39
PID 2796 wrote to memory of 2752	2796	cmd.exe	39
PID 2796 wrote to memory of 2752	2796	cmd.exe	39
PID 2796 wrote to memory of 1520	2796	cmd.exe	40
PID 2796 wrote to memory of 1520	2796	cmd.exe	40
PID 2796 wrote to memory of 1520	2796	cmd.exe	40
PID 2796 wrote to memory of 2660	2796	cmd.exe	41
PID 2796 wrote to memory of 2660	2796	cmd.exe	41
PID 2796 wrote to memory of 2660	2796	cmd.exe	41

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\05f1f2214c8b7b660817c4849fdf5537.exe
"C:\Users\Admin\AppData\Local\Temp\05f1f2214c8b7b660817c4849fdf5537.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2672
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\0KRCEWluHN.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2796
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2752
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:1520
- - C:\Users\Admin\AppData\Local\MsWebView2\csrss.exe
    "C:\Users\Admin\AppData\Local\MsWebView2\csrss.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2660

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 14 /tr "'C:\Users\Admin\AppData\Local\MsWebView2\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2920

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\MsWebView2\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2224

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\Users\Admin\AppData\Local\MsWebView2\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2736

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "05f1f2214c8b7b660817c4849fdf55370" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\AppData\Local\Temp\05f1f2214c8b7b660817c4849fdf5537.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2692

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "05f1f2214c8b7b660817c4849fdf5537" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\05f1f2214c8b7b660817c4849fdf5537.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2712

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "05f1f2214c8b7b660817c4849fdf55370" /sc MINUTE /mo 11 /tr "'C:\Users\Admin\AppData\Local\Temp\05f1f2214c8b7b660817c4849fdf5537.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2896

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

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\MsWebView2\csrss.exe

Filesize
737KB

MD5
05f1f2214c8b7b660817c4849fdf5537

SHA1
6af7aeb3078376bff17f06cd4c53993b31a48475

SHA256
c4abef44de234ff0d02add4b4a79084c2e1362944059a7207e621432e395b9a5

SHA512
58f46b2840f2165d4b51cbb1d39146929587c7d95de9711e0dec11a9c44b446429a7a49bd0c68473e97cb0880f9fb80b0466c75ffccfa848b655af91689eec23

Download Submit
C:\Users\Admin\AppData\Local\Temp\0KRCEWluHN.bat

Filesize
225B

MD5
16f6fbc63eec804444dc889daeebac49

SHA1
2578f548a5dd1d905dcf6956471f09b53f169f13

SHA256
fd566f1b86d823a5537bb8393f750175f556926c620d234ed8910604ade31f42

SHA512
5ec9b4055d6d709c19683fff6011822e90c8bce29fda0932397f0a9eec29547f8819d1c557adb193a4281887f5f9c450f23d4d8b6b5afe6c7dded72acd0739c3

Download Submit
memory/2660-23-0x0000000000AD0000-0x0000000000B8E000-memory.dmp

Filesize
760KB

Download
memory/2672-4-0x00000000005F0000-0x00000000005FE000-memory.dmp

Filesize
56KB

Download
memory/2672-6-0x0000000000620000-0x000000000063C000-memory.dmp

Filesize
112KB

Download
memory/2672-9-0x000007FEF6110000-0x000007FEF6AFC000-memory.dmp

Filesize
9.9MB

Download
memory/2672-8-0x0000000000640000-0x0000000000658000-memory.dmp

Filesize
96KB

Download
memory/2672-13-0x000007FEF6110000-0x000007FEF6AFC000-memory.dmp

Filesize
9.9MB

Download
memory/2672-14-0x000007FEF6110000-0x000007FEF6AFC000-memory.dmp

Filesize
9.9MB

Download
memory/2672-0-0x000007FEF6113000-0x000007FEF6114000-memory.dmp

Filesize
4KB

Download
memory/2672-20-0x000007FEF6110000-0x000007FEF6AFC000-memory.dmp

Filesize
9.9MB

Download
memory/2672-2-0x000007FEF6110000-0x000007FEF6AFC000-memory.dmp

Filesize
9.9MB

Download
memory/2672-1-0x00000000011C0000-0x000000000127E000-memory.dmp

Filesize
760KB

Download