dcrat | 72bb30456f1873536a0a8ef30670ba7ec4bd04c0687daa1fced08e5ec323da65

General

Target

72bb30456f1873536a0a8ef30670ba7ec4bd04c0687daa1fced08e5ec323da65.exe
Size

1.2MB
MD5

286f2a2e636d212bf2e934c1ae50a187
SHA1

7acb1e23adb769de5f0022b58dff13a2179e18ee
SHA256

72bb30456f1873536a0a8ef30670ba7ec4bd04c0687daa1fced08e5ec323da65
SHA512

c20a42ff22127751bf272ecebc97559f4acaa4656bc424301b8119848b3ab0d841ce12a04bf2729403a43766a3af7a1b75801407714b6ba2b27966864419ceec
SSDEEP

24576:Q2G/nvxW3WKYTZAhaFWRsPwQeM+gZ6lZr0vuK3o:QbA3OWhaFWReJ7Z6p

Score

10^/10

dcrat discovery infostealer rat

Malware Config

Signatures

DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat

Process spawned unexpected child process 21 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	2640	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	220	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1736	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1864	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1284	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4052	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2484	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3972	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1448	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2268	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4604	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	516	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3868	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3116	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1900	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4720	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1192	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2868	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1852	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4656	3948	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3912	3948	schtasks.exe	92

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/files/0x000a000000023ba2-10.dat	dcrat
behavioral2/memory/1700-13-0x00000000008E0000-0x00000000009B6000-memory.dmp	dcrat

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-1-5-21-2629364133-3182087385-364449604-1000\Control Panel\International\Geo\Nation	72bb30456f1873536a0a8ef30670ba7ec4bd04c0687daa1fced08e5ec323da65.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629364133-3182087385-364449604-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629364133-3182087385-364449604-1000\Control Panel\International\Geo\Nation	surrogateFontwin.exe

Executes dropped EXE 2 IoCs

pid	Process
1700	surrogateFontwin.exe
4128	upfc.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Portable Devices\RuntimeBroker.exe	surrogateFontwin.exe
File created	C:\Program Files\Windows Portable Devices\9e8d7a4ca61bd9	surrogateFontwin.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	72bb30456f1873536a0a8ef30670ba7ec4bd04c0687daa1fced08e5ec323da65.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-1-5-21-2629364133-3182087385-364449604-1000_Classes\Local Settings	72bb30456f1873536a0a8ef30670ba7ec4bd04c0687daa1fced08e5ec323da65.exe
Key created	\REGISTRY\USER\S-1-5-21-2629364133-3182087385-364449604-1000_Classes\Local Settings	surrogateFontwin.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 21 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1192	schtasks.exe
2868	schtasks.exe
1852	schtasks.exe
4656	schtasks.exe
1736	schtasks.exe
4052	schtasks.exe
1448	schtasks.exe
2268	schtasks.exe
3868	schtasks.exe
4720	schtasks.exe
3912	schtasks.exe
2640	schtasks.exe
220	schtasks.exe
1864	schtasks.exe
1284	schtasks.exe
2484	schtasks.exe
3116	schtasks.exe
3972	schtasks.exe
4604	schtasks.exe
516	schtasks.exe
1900	schtasks.exe

Suspicious behavior: EnumeratesProcesses 34 IoCs

pid	Process
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
1700	surrogateFontwin.exe
4128	upfc.exe
4128	upfc.exe
4128	upfc.exe
4128	upfc.exe
4128	upfc.exe
4128	upfc.exe
4128	upfc.exe
4128	upfc.exe
4128	upfc.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4128	upfc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1700	surrogateFontwin.exe
Token: SeDebugPrivilege	4128	upfc.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 552 wrote to memory of 3756	552	72bb30456f1873536a0a8ef30670ba7ec4bd04c0687daa1fced08e5ec323da65.exe	85
PID 552 wrote to memory of 3756	552	72bb30456f1873536a0a8ef30670ba7ec4bd04c0687daa1fced08e5ec323da65.exe	85
PID 552 wrote to memory of 3756	552	72bb30456f1873536a0a8ef30670ba7ec4bd04c0687daa1fced08e5ec323da65.exe	85
PID 3756 wrote to memory of 4152	3756	WScript.exe	88
PID 3756 wrote to memory of 4152	3756	WScript.exe	88
PID 3756 wrote to memory of 4152	3756	WScript.exe	88
PID 4152 wrote to memory of 1700	4152	cmd.exe	91
PID 4152 wrote to memory of 1700	4152	cmd.exe	91
PID 1700 wrote to memory of 4492	1700	surrogateFontwin.exe	114
PID 1700 wrote to memory of 4492	1700	surrogateFontwin.exe	114
PID 4492 wrote to memory of 2864	4492	cmd.exe	116
PID 4492 wrote to memory of 2864	4492	cmd.exe	116
PID 4492 wrote to memory of 4128	4492	cmd.exe	117
PID 4492 wrote to memory of 4128	4492	cmd.exe	117

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\72bb30456f1873536a0a8ef30670ba7ec4bd04c0687daa1fced08e5ec323da65.exe
"C:\Users\Admin\AppData\Local\Temp\72bb30456f1873536a0a8ef30670ba7ec4bd04c0687daa1fced08e5ec323da65.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:552
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\portwin\WxtRdL0.vbe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3756
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\portwin\ZLt1PtUq.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4152
  - - C:\portwin\surrogateFontwin.exe
      "C:\portwin\surrogateFontwin.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:1700
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\gjLfkDMpB5.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:4492
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:2864
      - C:\Users\All Users\Desktop\upfc.exe
        
        "C:\Users\All Users\Desktop\upfc.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:4128

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 9 /tr "'C:\Users\Default User\services.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2640

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Users\Default User\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:220

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 10 /tr "'C:\Users\Default User\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1736

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 5 /tr "'C:\Users\All Users\Desktop\upfc.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1864

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Users\All Users\Desktop\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1284

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 14 /tr "'C:\Users\All Users\Desktop\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4052

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 12 /tr "'C:\Users\Default\OfficeClickToRun.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2484

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Users\Default\OfficeClickToRun.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3972

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 5 /tr "'C:\Users\Default\OfficeClickToRun.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1448

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 11 /tr "'C:\portwin\dwm.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2268

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\portwin\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4604

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 5 /tr "'C:\portwin\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:516

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Portable Devices\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3868

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files\Windows Portable Devices\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3116

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 7 /tr "'C:\Program Files\Windows Portable Devices\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1900

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 7 /tr "'C:\portwin\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4720

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\portwin\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1192

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 13 /tr "'C:\portwin\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2868

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 12 /tr "'C:\Users\Default User\conhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1852

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\Users\Default User\conhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4656

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 14 /tr "'C:\Users\Default User\conhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3912

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\gjLfkDMpB5.bat

Filesize
200B

MD5
f41d965dc4cf82cecbf80e229dc39241

SHA1
331ed4e5163927490c8ba2ecae47a882548470d1

SHA256
2961b0a2227f9f2ed905f9f323ff431f9417469d2a51ba9d29bd266c38db7824

SHA512
a7581d1e79938a4cad7c366d63af8334c502e9aac42b722ea7f3628e5306191f773e69148c8b99907410250c1b970c371c26d180ac859f5341567428fb0f5e52

Download Submit
C:\portwin\WxtRdL0.vbe

Filesize
192B

MD5
79c290f69a1e803c1e27f15ec38c2c4d

SHA1
070cefd116bebdc1c937c5e4f0fb82b1b252c841

SHA256
72c03e533a77883003e36fb418231593ac3716f68524f802e6a457ecd06adcef

SHA512
e96b120f1db68bd3b49e279cc074487867668e950600ae5f4f978ddee99cb11828b743ec565b98bcb1728587065fb313ceba62886f29a0becbaead8c339144f7

Download Submit
C:\portwin\ZLt1PtUq.bat

Filesize
33B

MD5
1664acb69894f5a5cda523a89135755d

SHA1
77c2eef1ab4951f8ede3a52ff133075e5ac2f847

SHA256
291d23afcfb0e04624a2ec0090c0de8e86d3a50ef9045a597e807b9eb6be29f3

SHA512
709b2debea310d6dee27fa1338d04347279223d9ed0ef70ac4149cec4e917d783bf4ed984705570d2bff57839945269a73056bf36064bf58645e3c3be783b120

Download Submit
C:\portwin\surrogateFontwin.exe

Filesize
827KB

MD5
58ab7df8ad61e51b96fe00e1e8858d9c

SHA1
b1f528b964e6d74de47c6b1a001db2ca4f198615

SHA256
4e0e1516b3e3b645e1dd0efcd10f695eac636f3fe18b3dae782c035e3bcd15ae

SHA512
c40dbacc1bf46456751ff02271296c7aab90743c42d4aebd19e56ba8f90f9d4d14a1c9759967f95612ea7bbab5ea093dedf9880f9695add6307595997a82a745

Download Submit
memory/1700-12-0x00007FFA6EC23000-0x00007FFA6EC25000-memory.dmp

Filesize
8KB

Download
memory/1700-13-0x00000000008E0000-0x00000000009B6000-memory.dmp

Filesize
856KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads