dcrat | 08acc4229c4d8424570ee93f20f7c60a0e9e0605f7dc8594d14d52209b72ce00

Analysis

max time kernel
151s
max time network
149s
platform
windows7_x64
resource
win7v20201028
submitted
02-04-2021 18:03

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General

Target

f4787944e95596ad1847910ce4180a20.exe
Size

942KB
MD5

f4787944e95596ad1847910ce4180a20
SHA1

f6ec2109ff3f3985ee6f73d0cf680343a90c8b2b
SHA256

08acc4229c4d8424570ee93f20f7c60a0e9e0605f7dc8594d14d52209b72ce00
SHA512

5466b793806093f291a0712846510c3573654bb7d0ded3b9f2a91a0238bd14ae4926fb1f1111a62b1c4e570f9ece54c2019c16c60b9c1af145b67ef9607e894b

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 Payload 6 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x00050000000130d6-9.dat	dcrat
behavioral1/files/0x00050000000130d6-11.dat	dcrat
behavioral1/files/0x00050000000130d6-10.dat	dcrat
behavioral1/files/0x00050000000130d6-13.dat	dcrat
behavioral1/files/0x00030000000130f0-26.dat	dcrat
behavioral1/files/0x00030000000130f0-27.dat	dcrat

Executes dropped EXE 2 IoCs

pid	Process
1512	FontsavesIntorefperf.exe
1976	conhost.exe

Loads dropped DLL 2 IoCs

pid	Process
1440	cmd.exe
1440	cmd.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
5	ipinfo.io
6	ipinfo.io

Drops file in System32 directory 11 IoCs

description	ioc	Process
File created	C:\Windows\System32\wuwebv\0a1fd5f707cd16ea89afd3d6db52b2da58214a6c	FontsavesIntorefperf.exe
File created	C:\Windows\System32\dimsroam\csrss.exe	FontsavesIntorefperf.exe
File created	C:\Windows\System32\dimsroam\886983d96e3d3e31032c679b2d4ea91b6c05afef	FontsavesIntorefperf.exe
File created	C:\Windows\System32\wbem\interop\WMIADAP.exe	FontsavesIntorefperf.exe
File created	C:\Windows\System32\wbem\iscsirem\WmiPrvSE.exe	FontsavesIntorefperf.exe
File created	C:\Windows\System32\wuwebv\sppsvc.exe	FontsavesIntorefperf.exe
File created	C:\Windows\System32\CertEnrollCtrl\conhost.exe	FontsavesIntorefperf.exe
File created	C:\Windows\System32\CertEnrollCtrl\088424020bedd6b28ac7fd22ee35dcd7322895ce	FontsavesIntorefperf.exe
File opened for modification	C:\Windows\System32\wbem\interop\WMIADAP.exe	FontsavesIntorefperf.exe
File created	C:\Windows\System32\wbem\interop\75a57c1bdf437c0c81ad56e81f43c7323ed35745	FontsavesIntorefperf.exe
File created	C:\Windows\System32\wbem\iscsirem\24dbde2999530ef5fd907494bc374d663924116c	FontsavesIntorefperf.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\LiveKernelReports\explorer.exe	FontsavesIntorefperf.exe
File created	C:\Windows\LiveKernelReports\7a0fd90576e08807bde2cc57bcf9854bbce05fe3	FontsavesIntorefperf.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 7 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
1356	schtasks.exe
1592	schtasks.exe
920	schtasks.exe
1792	schtasks.exe
1724	schtasks.exe
1000	schtasks.exe
1584	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1512	FontsavesIntorefperf.exe
1976	conhost.exe
1976	conhost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1512	FontsavesIntorefperf.exe
Token: SeDebugPrivilege	1976	conhost.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 1064 wrote to memory of 2000	1064	f4787944e95596ad1847910ce4180a20.exe	26
PID 1064 wrote to memory of 2000	1064	f4787944e95596ad1847910ce4180a20.exe	26
PID 1064 wrote to memory of 2000	1064	f4787944e95596ad1847910ce4180a20.exe	26
PID 1064 wrote to memory of 2000	1064	f4787944e95596ad1847910ce4180a20.exe	26
PID 2000 wrote to memory of 1440	2000	WScript.exe	30
PID 2000 wrote to memory of 1440	2000	WScript.exe	30
PID 2000 wrote to memory of 1440	2000	WScript.exe	30
PID 2000 wrote to memory of 1440	2000	WScript.exe	30
PID 1440 wrote to memory of 1512	1440	cmd.exe	32
PID 1440 wrote to memory of 1512	1440	cmd.exe	32
PID 1440 wrote to memory of 1512	1440	cmd.exe	32
PID 1440 wrote to memory of 1512	1440	cmd.exe	32
PID 1512 wrote to memory of 1356	1512	FontsavesIntorefperf.exe	34
PID 1512 wrote to memory of 1356	1512	FontsavesIntorefperf.exe	34
PID 1512 wrote to memory of 1356	1512	FontsavesIntorefperf.exe	34
PID 1512 wrote to memory of 1592	1512	FontsavesIntorefperf.exe	36
PID 1512 wrote to memory of 1592	1512	FontsavesIntorefperf.exe	36
PID 1512 wrote to memory of 1592	1512	FontsavesIntorefperf.exe	36
PID 1512 wrote to memory of 920	1512	FontsavesIntorefperf.exe	38
PID 1512 wrote to memory of 920	1512	FontsavesIntorefperf.exe	38
PID 1512 wrote to memory of 920	1512	FontsavesIntorefperf.exe	38
PID 1512 wrote to memory of 1792	1512	FontsavesIntorefperf.exe	40
PID 1512 wrote to memory of 1792	1512	FontsavesIntorefperf.exe	40
PID 1512 wrote to memory of 1792	1512	FontsavesIntorefperf.exe	40
PID 1512 wrote to memory of 1724	1512	FontsavesIntorefperf.exe	42
PID 1512 wrote to memory of 1724	1512	FontsavesIntorefperf.exe	42
PID 1512 wrote to memory of 1724	1512	FontsavesIntorefperf.exe	42
PID 1512 wrote to memory of 1000	1512	FontsavesIntorefperf.exe	44
PID 1512 wrote to memory of 1000	1512	FontsavesIntorefperf.exe	44
PID 1512 wrote to memory of 1000	1512	FontsavesIntorefperf.exe	44
PID 1512 wrote to memory of 1584	1512	FontsavesIntorefperf.exe	46
PID 1512 wrote to memory of 1584	1512	FontsavesIntorefperf.exe	46
PID 1512 wrote to memory of 1584	1512	FontsavesIntorefperf.exe	46
PID 1512 wrote to memory of 1976	1512	FontsavesIntorefperf.exe	48
PID 1512 wrote to memory of 1976	1512	FontsavesIntorefperf.exe	48
PID 1512 wrote to memory of 1976	1512	FontsavesIntorefperf.exe	48

C:\Users\Admin\AppData\Local\Temp\f4787944e95596ad1847910ce4180a20.exe
"C:\Users\Admin\AppData\Local\Temp\f4787944e95596ad1847910ce4180a20.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1064
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\FontsavesInto\m8aBJ5FB2D94qk25GJ.vbe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2000
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\FontsavesInto\5X6xHq8OosomjmO.bat" "
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:1440
  - - C:\FontsavesInto\FontsavesIntorefperf.exe
      "C:\FontsavesInto\FontsavesIntorefperf.exe"
      4⤵
      Executes dropped EXE
      Drops file in System32 directory
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1512
    - - C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\Windows\System32\wbem\interop\WMIADAP.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:1356
    - - C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\System32\wbem\iscsirem\WmiPrvSE.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:1592
    - - C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\LiveKernelReports\explorer.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:920
    - - C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "smss" /sc ONLOGON /tr "'C:\Documents and Settings\smss.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:1792
    - - C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Windows\System32\wuwebv\sppsvc.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:1724
    - - C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\System32\dimsroam\csrss.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:1000
    - - C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "conhost" /sc ONLOGON /tr "'C:\Windows\System32\CertEnrollCtrl\conhost.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:1584
    - - C:\Windows\System32\CertEnrollCtrl\conhost.exe
        
        "C:\Windows\System32\CertEnrollCtrl\conhost.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1976

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1064-2-0x0000000076101000-0x0000000076103000-memory.dmp

Filesize
8KB

Download
memory/1512-15-0x0000000000C70000-0x0000000000C71000-memory.dmp

Filesize
4KB

Download
memory/1512-14-0x000007FEF4FA0000-0x000007FEF598C000-memory.dmp

Filesize
9.9MB

Download
memory/1512-17-0x000000001AE40000-0x000000001AE42000-memory.dmp

Filesize
8KB

Download
memory/1976-28-0x000007FEF4FA0000-0x000007FEF598C000-memory.dmp

Filesize
9.9MB

Download
memory/1976-29-0x0000000000010000-0x0000000000011000-memory.dmp

Filesize
4KB

Download
memory/1976-31-0x000000001B1C0000-0x000000001B1C2000-memory.dmp

Filesize
8KB

Download
memory/2000-8-0x00000000029E0000-0x00000000029E4000-memory.dmp

Filesize
16KB

Download