dcrat | c73fd1810d771974cff5f436a14f76cb3cbeb442baf97f3553ba99cf118bc337

Analysis

max time kernel
91s
max time network
183s
platform
windows7_x64
resource
win7v20210408
submitted
25/06/2021, 07:56

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General

Target
a0a78d8f7c310cafa124260fd04c4294.exe
Size 1.1MB
Sample210625-e4s9wlk62a
SHA256 c73fd1810d771974cff5f436a14f76cb3cbeb442baf97f3553ba99cf118bc337
MD5 a0a78d8f7c310cafa124260fd04c4294
SHA1 8ad40dc4cbe758c5d3460f541ab535e57b0eff2f
SHA512 e120c624faceb4b8dec9f0bf65ed6c96a3750e4275fa9fab7e7610a51de4890d1dd827bffd309c36eaf5dc6278eb283fe366a989fe6fc44faae63191a3965a77
MD5 SHA1 SHA512

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 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x00030000000130e6-90.dat	dcrat
behavioral1/files/0x00030000000130e6-92.dat	dcrat

Executes dropped EXE 1 IoCs

pid	Process
904	Idle.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
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

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
7	ipinfo.io
8	ipinfo.io

Drops file in System32 directory 17 IoCs

description	ioc	Process
File created	C:\Windows\System32\dmview\csrss.exe	a0a78d8f7c310cafa124260fd04c4294.exe
File created	C:\Windows\System32\oleaccrc\csrss.exe	a0a78d8f7c310cafa124260fd04c4294.exe
File created	C:\Windows\System32\WSManMigrationPlugin\wininit.exe	a0a78d8f7c310cafa124260fd04c4294.exe
File created	C:\Windows\System32\WSManMigrationPlugin\560854153607923c4c5f107085a7db67be01f252	a0a78d8f7c310cafa124260fd04c4294.exe
File created	C:\Windows\System32\oleaccrc\886983d96e3d3e31032c679b2d4ea91b6c05afef	a0a78d8f7c310cafa124260fd04c4294.exe
File created	C:\Windows\System32\wbem\dimsroam\WmiPrvSE.exe	a0a78d8f7c310cafa124260fd04c4294.exe
File created	C:\Windows\System32\WINSRPC\lsm.exe	a0a78d8f7c310cafa124260fd04c4294.exe
File created	C:\Windows\System32\C_10007\101b941d020240259ca4912829b53995ad543df6	a0a78d8f7c310cafa124260fd04c4294.exe
File created	C:\Windows\System32\whhelper\winlogon.exe	a0a78d8f7c310cafa124260fd04c4294.exe
File created	C:\Windows\System32\whhelper\cc11b995f2a76da408ea6a601e682e64743153ad	a0a78d8f7c310cafa124260fd04c4294.exe
File created	C:\Windows\System32\wbem\dimsroam\24dbde2999530ef5fd907494bc374d663924116c	a0a78d8f7c310cafa124260fd04c4294.exe
File opened for modification	C:\Windows\System32\WINSRPC\lsm.exe	a0a78d8f7c310cafa124260fd04c4294.exe
File created	C:\Windows\System32\C_10007\lsm.exe	a0a78d8f7c310cafa124260fd04c4294.exe
File created	C:\Windows\System32\netid\560854153607923c4c5f107085a7db67be01f252	a0a78d8f7c310cafa124260fd04c4294.exe
File created	C:\Windows\System32\WINSRPC\101b941d020240259ca4912829b53995ad543df6	a0a78d8f7c310cafa124260fd04c4294.exe
File created	C:\Windows\System32\netid\wininit.exe	a0a78d8f7c310cafa124260fd04c4294.exe
File created	C:\Windows\System32\dmview\886983d96e3d3e31032c679b2d4ea91b6c05afef	a0a78d8f7c310cafa124260fd04c4294.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\Desktop\WMIADAP.exe	a0a78d8f7c310cafa124260fd04c4294.exe
File opened for modification	C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\Desktop\WMIADAP.exe	a0a78d8f7c310cafa124260fd04c4294.exe
File created	C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\Desktop\75a57c1bdf437c0c81ad56e81f43c7323ed35745	a0a78d8f7c310cafa124260fd04c4294.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\bfsvc\explorer.exe	a0a78d8f7c310cafa124260fd04c4294.exe
File created	C:\Windows\bfsvc\7a0fd90576e08807bde2cc57bcf9854bbce05fe3	a0a78d8f7c310cafa124260fd04c4294.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 12 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
1772	schtasks.exe
1388	schtasks.exe
1648	schtasks.exe
1792	schtasks.exe
856	schtasks.exe
548	schtasks.exe
860	schtasks.exe
1776	schtasks.exe
1792	schtasks.exe
1392	schtasks.exe
968	schtasks.exe
2028	schtasks.exe

Runs ping.exe 1 TTPs 2 IoCs

Remote System Discovery

T1018

pid	Process
1340	PING.EXE
1700	PING.EXE

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1840	a0a78d8f7c310cafa124260fd04c4294.exe
1932	a0a78d8f7c310cafa124260fd04c4294.exe
1932	a0a78d8f7c310cafa124260fd04c4294.exe
1932	a0a78d8f7c310cafa124260fd04c4294.exe
1560	a0a78d8f7c310cafa124260fd04c4294.exe
904	Idle.exe
904	Idle.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1840	a0a78d8f7c310cafa124260fd04c4294.exe
Token: SeDebugPrivilege	1932	a0a78d8f7c310cafa124260fd04c4294.exe
Token: SeDebugPrivilege	1560	a0a78d8f7c310cafa124260fd04c4294.exe
Token: SeDebugPrivilege	904	Idle.exe

Suspicious use of WriteProcessMemory 63 IoCs

description	pid	Process	procid_target
PID 1840 wrote to memory of 1772	1840	a0a78d8f7c310cafa124260fd04c4294.exe	30
PID 1840 wrote to memory of 1772	1840	a0a78d8f7c310cafa124260fd04c4294.exe	30
PID 1840 wrote to memory of 1772	1840	a0a78d8f7c310cafa124260fd04c4294.exe	30
PID 1840 wrote to memory of 1776	1840	a0a78d8f7c310cafa124260fd04c4294.exe	32
PID 1840 wrote to memory of 1776	1840	a0a78d8f7c310cafa124260fd04c4294.exe	32
PID 1840 wrote to memory of 1776	1840	a0a78d8f7c310cafa124260fd04c4294.exe	32
PID 1840 wrote to memory of 1792	1840	a0a78d8f7c310cafa124260fd04c4294.exe	34
PID 1840 wrote to memory of 1792	1840	a0a78d8f7c310cafa124260fd04c4294.exe	34
PID 1840 wrote to memory of 1792	1840	a0a78d8f7c310cafa124260fd04c4294.exe	34
PID 1840 wrote to memory of 1220	1840	a0a78d8f7c310cafa124260fd04c4294.exe	36
PID 1840 wrote to memory of 1220	1840	a0a78d8f7c310cafa124260fd04c4294.exe	36
PID 1840 wrote to memory of 1220	1840	a0a78d8f7c310cafa124260fd04c4294.exe	36
PID 1220 wrote to memory of 928	1220	cmd.exe	38
PID 1220 wrote to memory of 928	1220	cmd.exe	38
PID 1220 wrote to memory of 928	1220	cmd.exe	38
PID 1220 wrote to memory of 1340	1220	cmd.exe	39
PID 1220 wrote to memory of 1340	1220	cmd.exe	39
PID 1220 wrote to memory of 1340	1220	cmd.exe	39
PID 1220 wrote to memory of 1932	1220	cmd.exe	40
PID 1220 wrote to memory of 1932	1220	cmd.exe	40
PID 1220 wrote to memory of 1932	1220	cmd.exe	40
PID 1932 wrote to memory of 1388	1932	a0a78d8f7c310cafa124260fd04c4294.exe	41
PID 1932 wrote to memory of 1388	1932	a0a78d8f7c310cafa124260fd04c4294.exe	41
PID 1932 wrote to memory of 1388	1932	a0a78d8f7c310cafa124260fd04c4294.exe	41
PID 1932 wrote to memory of 1392	1932	a0a78d8f7c310cafa124260fd04c4294.exe	43
PID 1932 wrote to memory of 1392	1932	a0a78d8f7c310cafa124260fd04c4294.exe	43
PID 1932 wrote to memory of 1392	1932	a0a78d8f7c310cafa124260fd04c4294.exe	43
PID 1932 wrote to memory of 968	1932	a0a78d8f7c310cafa124260fd04c4294.exe	45
PID 1932 wrote to memory of 968	1932	a0a78d8f7c310cafa124260fd04c4294.exe	45
PID 1932 wrote to memory of 968	1932	a0a78d8f7c310cafa124260fd04c4294.exe	45
PID 1932 wrote to memory of 1560	1932	a0a78d8f7c310cafa124260fd04c4294.exe	47
PID 1932 wrote to memory of 1560	1932	a0a78d8f7c310cafa124260fd04c4294.exe	47
PID 1932 wrote to memory of 1560	1932	a0a78d8f7c310cafa124260fd04c4294.exe	47
PID 1560 wrote to memory of 1648	1560	a0a78d8f7c310cafa124260fd04c4294.exe	48
PID 1560 wrote to memory of 1648	1560	a0a78d8f7c310cafa124260fd04c4294.exe	48
PID 1560 wrote to memory of 1648	1560	a0a78d8f7c310cafa124260fd04c4294.exe	48
PID 1560 wrote to memory of 1792	1560	a0a78d8f7c310cafa124260fd04c4294.exe	50
PID 1560 wrote to memory of 1792	1560	a0a78d8f7c310cafa124260fd04c4294.exe	50
PID 1560 wrote to memory of 1792	1560	a0a78d8f7c310cafa124260fd04c4294.exe	50
PID 1560 wrote to memory of 2028	1560	a0a78d8f7c310cafa124260fd04c4294.exe	52
PID 1560 wrote to memory of 2028	1560	a0a78d8f7c310cafa124260fd04c4294.exe	52
PID 1560 wrote to memory of 2028	1560	a0a78d8f7c310cafa124260fd04c4294.exe	52
PID 1560 wrote to memory of 856	1560	a0a78d8f7c310cafa124260fd04c4294.exe	54
PID 1560 wrote to memory of 856	1560	a0a78d8f7c310cafa124260fd04c4294.exe	54
PID 1560 wrote to memory of 856	1560	a0a78d8f7c310cafa124260fd04c4294.exe	54
PID 1560 wrote to memory of 548	1560	a0a78d8f7c310cafa124260fd04c4294.exe	56
PID 1560 wrote to memory of 548	1560	a0a78d8f7c310cafa124260fd04c4294.exe	56
PID 1560 wrote to memory of 548	1560	a0a78d8f7c310cafa124260fd04c4294.exe	56
PID 1560 wrote to memory of 860	1560	a0a78d8f7c310cafa124260fd04c4294.exe	58
PID 1560 wrote to memory of 860	1560	a0a78d8f7c310cafa124260fd04c4294.exe	58
PID 1560 wrote to memory of 860	1560	a0a78d8f7c310cafa124260fd04c4294.exe	58
PID 1560 wrote to memory of 1220	1560	a0a78d8f7c310cafa124260fd04c4294.exe	60
PID 1560 wrote to memory of 1220	1560	a0a78d8f7c310cafa124260fd04c4294.exe	60
PID 1560 wrote to memory of 1220	1560	a0a78d8f7c310cafa124260fd04c4294.exe	60
PID 1220 wrote to memory of 1708	1220	cmd.exe	62
PID 1220 wrote to memory of 1708	1220	cmd.exe	62
PID 1220 wrote to memory of 1708	1220	cmd.exe	62
PID 1220 wrote to memory of 1700	1220	cmd.exe	63
PID 1220 wrote to memory of 1700	1220	cmd.exe	63
PID 1220 wrote to memory of 1700	1220	cmd.exe	63
PID 1220 wrote to memory of 904	1220	cmd.exe	64
PID 1220 wrote to memory of 904	1220	cmd.exe	64
PID 1220 wrote to memory of 904	1220	cmd.exe	64

C:\Users\Admin\AppData\Local\Temp\a0a78d8f7c310cafa124260fd04c4294.exe
"C:\Users\Admin\AppData\Local\Temp\a0a78d8f7c310cafa124260fd04c4294.exe"
1⤵
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1840
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\System32\WINSRPC\lsm.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1772
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\System32\C_10007\lsm.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1776
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\System32\netid\wininit.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1792
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\Kd68IhP7V8.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1220
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:928
- - C:\Windows\system32\PING.EXE
    ping -n 5 localhost
    3⤵
    - Runs ping.exe
    PID:1340
- - C:\Users\Admin\AppData\Local\Temp\a0a78d8f7c310cafa124260fd04c4294.exe
    "C:\Users\Admin\AppData\Local\Temp\a0a78d8f7c310cafa124260fd04c4294.exe"
    3⤵
    - Drops file in System32 directory
    - Drops file in Program Files directory
    - Drops file in Windows directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1932
  - - C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\Desktop\WMIADAP.exe'" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:1388
  - - C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\whhelper\winlogon.exe'" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:1392
  - - C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\bfsvc\explorer.exe'" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:968
  - - C:\Users\Admin\AppData\Local\Temp\a0a78d8f7c310cafa124260fd04c4294.exe
      "C:\Users\Admin\AppData\Local\Temp\a0a78d8f7c310cafa124260fd04c4294.exe"
      4⤵
      Drops file in System32 directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1560
    - - C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "taskhost" /sc ONLOGON /tr "'C:\Documents and Settings\taskhost.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:1648
    - - C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\System32\WSManMigrationPlugin\wininit.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:1792
    - - C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "Idle" /sc ONLOGON /tr "'C:\ProgramData\Application Data\Idle.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:2028
    - - C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\System32\dmview\csrss.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:856
    - - C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\System32\oleaccrc\csrss.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:548
    - - C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\System32\wbem\dimsroam\WmiPrvSE.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:860
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\ZuKQZB5kre.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1220
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:1708
      - C:\Windows\system32\PING.EXE
        
        ping -n 5 localhost
        6⤵
        Runs ping.exe
        
        PID:1700
      - C:\ProgramData\Application Data\Idle.exe
        
        "C:\ProgramData\Application Data\Idle.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:904

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

Remote System Discovery

T1018

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/904-93-0x00000000010B0000-0x00000000010B1000-memory.dmp

Download

memory/904-95-0x000000001B0C0000-0x000000001B0C2000-memory.dmp

Download

memory/904-96-0x0000000000180000-0x0000000000185000-memory.dmp

Download

memory/1560-79-0x000000001B020000-0x000000001B022000-memory.dmp

Download

memory/1840-59-0x0000000000C90000-0x0000000000C91000-memory.dmp

Download

memory/1840-61-0x000000001B310000-0x000000001B312000-memory.dmp

Download

memory/1932-70-0x0000000000E40000-0x0000000000E41000-memory.dmp

Download

memory/1932-72-0x000000001B110000-0x000000001B112000-memory.dmp

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