dcrat | b90b75dcc06003408ea406424ae16179137d2a39d2092d26c25677122479ed72

General

Target

95ce095073ce57e823674de34b621cdb.exe
Size

2.3MB
MD5

95ce095073ce57e823674de34b621cdb
SHA1

129a46af1ad0ad1a15f6f3df3e1ee5e1147ae004
SHA256

b90b75dcc06003408ea406424ae16179137d2a39d2092d26c25677122479ed72
SHA512

e16251a67637a09771d3962fca4fa92ac5f58483cff8cbf29c94f0eb0237f30deed49036a724cff32b0942715334865c2bb06084fefb0872551181c8e6accb28
SSDEEP

49152:bSrudTH6WUww8iz704mELP36hEgMMFzFOIh:GrudTHu0ivwELP38MMhFOIh

Score

10^/10

dcrat infostealer rat

Malware Config

Signatures

DcRat 18 IoCs

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

rat infostealer dcrat

pid	Process
3100	schtasks.exe
4236	schtasks.exe
1480	schtasks.exe
1032	schtasks.exe
4716	schtasks.exe
4100	schtasks.exe
4412	schtasks.exe
4000	schtasks.exe
1640	schtasks.exe
3052	schtasks.exe
2420	schtasks.exe
4828	schtasks.exe
2940	schtasks.exe
3204	schtasks.exe
4504	schtasks.exe
1728	schtasks.exe
4164	schtasks.exe
4808	schtasks.exe

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	4504	3668	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4236	3668	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2940	3668	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4000	3668	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3100	3668	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1640	3668	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3204	3668	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3052	3668	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1728	3668	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4164	3668	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4808	3668	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4412	3668	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1480	3668	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1032	3668	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4716	3668	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2420	3668	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4828	3668	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4100	3668	schtasks.exe	83

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/3200-1-0x0000000000900000-0x0000000000B50000-memory.dmp	dcrat
behavioral2/files/0x000a000000023b80-24.dat	dcrat

Checks computer location settings 2 TTPs 2 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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	95ce095073ce57e823674de34b621cdb.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	95ce095073ce57e823674de34b621cdb.exe

Executes dropped EXE 1 IoCs

pid	Process
1540	backgroundTaskHost.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files\Uninstall Information\System.exe	95ce095073ce57e823674de34b621cdb.exe
File opened for modification	C:\Program Files\Uninstall Information\System.exe	95ce095073ce57e823674de34b621cdb.exe
File created	C:\Program Files\Uninstall Information\27d1bcfc3c54e0	95ce095073ce57e823674de34b621cdb.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\appcompat\Programs\TextInputHost.exe	95ce095073ce57e823674de34b621cdb.exe
File created	C:\Windows\appcompat\Programs\22eafd247d37c3	95ce095073ce57e823674de34b621cdb.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000_Classes\Local Settings	95ce095073ce57e823674de34b621cdb.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
4828	schtasks.exe
4100	schtasks.exe
1728	schtasks.exe
4808	schtasks.exe
1480	schtasks.exe
4504	schtasks.exe
4236	schtasks.exe
3100	schtasks.exe
1640	schtasks.exe
3204	schtasks.exe
4164	schtasks.exe
4412	schtasks.exe
2940	schtasks.exe
4000	schtasks.exe
4716	schtasks.exe
2420	schtasks.exe
3052	schtasks.exe
1032	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
3200	95ce095073ce57e823674de34b621cdb.exe
4448	95ce095073ce57e823674de34b621cdb.exe
4448	95ce095073ce57e823674de34b621cdb.exe
4448	95ce095073ce57e823674de34b621cdb.exe
4448	95ce095073ce57e823674de34b621cdb.exe
4448	95ce095073ce57e823674de34b621cdb.exe
4448	95ce095073ce57e823674de34b621cdb.exe
4448	95ce095073ce57e823674de34b621cdb.exe
4448	95ce095073ce57e823674de34b621cdb.exe
4448	95ce095073ce57e823674de34b621cdb.exe
4448	95ce095073ce57e823674de34b621cdb.exe
4448	95ce095073ce57e823674de34b621cdb.exe
1540	backgroundTaskHost.exe
1540	backgroundTaskHost.exe
1540	backgroundTaskHost.exe
1540	backgroundTaskHost.exe
1540	backgroundTaskHost.exe
1540	backgroundTaskHost.exe
1540	backgroundTaskHost.exe
1540	backgroundTaskHost.exe
1540	backgroundTaskHost.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3200	95ce095073ce57e823674de34b621cdb.exe
Token: SeDebugPrivilege	4448	95ce095073ce57e823674de34b621cdb.exe
Token: SeDebugPrivilege	1540	backgroundTaskHost.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3200 wrote to memory of 4448	3200	95ce095073ce57e823674de34b621cdb.exe	90
PID 3200 wrote to memory of 4448	3200	95ce095073ce57e823674de34b621cdb.exe	90
PID 4448 wrote to memory of 4644	4448	95ce095073ce57e823674de34b621cdb.exe	103
PID 4448 wrote to memory of 4644	4448	95ce095073ce57e823674de34b621cdb.exe	103
PID 4644 wrote to memory of 5104	4644	cmd.exe	105
PID 4644 wrote to memory of 5104	4644	cmd.exe	105
PID 4644 wrote to memory of 1540	4644	cmd.exe	109
PID 4644 wrote to memory of 1540	4644	cmd.exe	109

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\95ce095073ce57e823674de34b621cdb.exe
"C:\Users\Admin\AppData\Local\Temp\95ce095073ce57e823674de34b621cdb.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3200
- C:\Users\Admin\AppData\Local\Temp\95ce095073ce57e823674de34b621cdb.exe
  "C:\Users\Admin\AppData\Local\Temp\95ce095073ce57e823674de34b621cdb.exe"
  2⤵
  - Checks computer location settings
  - Drops file in Program Files directory
  - Drops file in Windows directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4448
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\16qPR6FN0W.bat"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4644
  - - C:\Windows\system32\w32tm.exe
      w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
      4⤵
      PID:5104
  - - C:\Recovery\WindowsRE\backgroundTaskHost.exe
      "C:\Recovery\WindowsRE\backgroundTaskHost.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1540

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\sysmon.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4504

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\sysmon.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4236

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\sysmon.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2940

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4000

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3100

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1640

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 9 /tr "'C:\Program Files\Uninstall Information\System.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3204

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Program Files\Uninstall Information\System.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3052

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 13 /tr "'C:\Program Files\Uninstall Information\System.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1728

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\backgroundTaskHost.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4164

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\backgroundTaskHost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4808

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\backgroundTaskHost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4412

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 6 /tr "'C:\Users\Default\Videos\fontdrvhost.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1480

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Users\Default\Videos\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1032

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 5 /tr "'C:\Users\Default\Videos\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4716

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 7 /tr "'C:\Windows\appcompat\Programs\TextInputHost.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2420

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Windows\appcompat\Programs\TextInputHost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4828

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 9 /tr "'C:\Windows\appcompat\Programs\TextInputHost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4100

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\95ce095073ce57e823674de34b621cdb.exe.log

Filesize
1KB

MD5
bbb951a34b516b66451218a3ec3b0ae1

SHA1
7393835a2476ae655916e0a9687eeaba3ee876e9

SHA256
eb70c64ae99d14ac2588b7a84854fbf3c420532d7fe4dfd49c7b5a70c869943a

SHA512
63bcbfcf8e7421c66855c487c31b2991a989bdea0c1edd4c40066b52fa3eb3d9d37db1cd21b8eb4f33dd5870cc20532c8f485eab9c0b4f6b0793a35c077f2d6f

Download Submit
C:\Users\Admin\AppData\Local\Temp\16qPR6FN0W.bat

Filesize
209B

MD5
5879cf35249c40ce74660d517670a92b

SHA1
f19fe9b924acd99f33e8f4196cf86f2c00339770

SHA256
08ffedb84eac7b85fe7a5934223f2caa1c9ae6a61c9f8a750b5d227dab08f8ed

SHA512
266d40d87d613db38f78c34fbde3b2240c85c35adbfcb3fee3fed5690d1f355f4872eb2e840e3d803eae85a10be8dd73976eea7b164bfe7a43183275301c3510

Download Submit
C:\Users\Default\Videos\fontdrvhost.exe

Filesize
2.3MB

MD5
95ce095073ce57e823674de34b621cdb

SHA1
129a46af1ad0ad1a15f6f3df3e1ee5e1147ae004

SHA256
b90b75dcc06003408ea406424ae16179137d2a39d2092d26c25677122479ed72

SHA512
e16251a67637a09771d3962fca4fa92ac5f58483cff8cbf29c94f0eb0237f30deed49036a724cff32b0942715334865c2bb06084fefb0872551181c8e6accb28

Download Submit
memory/1540-36-0x0000000001630000-0x0000000001642000-memory.dmp

Filesize
72KB

Download
memory/3200-8-0x000000001C7A0000-0x000000001CCC8000-memory.dmp

Filesize
5.2MB

Download
memory/3200-6-0x0000000002DA0000-0x0000000002DF6000-memory.dmp

Filesize
344KB

Download
memory/3200-4-0x000000001B7E0000-0x000000001B830000-memory.dmp

Filesize
320KB

Download
memory/3200-7-0x0000000002DF0000-0x0000000002E02000-memory.dmp

Filesize
72KB

Download
memory/3200-0-0x00007FF8A8573000-0x00007FF8A8575000-memory.dmp

Filesize
8KB

Download
memory/3200-9-0x000000001B850000-0x000000001B85E000-memory.dmp

Filesize
56KB

Download
memory/3200-10-0x000000001B860000-0x000000001B868000-memory.dmp

Filesize
32KB

Download
memory/3200-5-0x0000000002D80000-0x0000000002D96000-memory.dmp

Filesize
88KB

Download
memory/3200-17-0x00007FF8A8570000-0x00007FF8A9031000-memory.dmp

Filesize
10.8MB

Download
memory/3200-1-0x0000000000900000-0x0000000000B50000-memory.dmp

Filesize
2.3MB

Download
memory/3200-2-0x00007FF8A8570000-0x00007FF8A9031000-memory.dmp

Filesize
10.8MB

Download
memory/3200-3-0x0000000002D60000-0x0000000002D7C000-memory.dmp

Filesize
112KB

Download
memory/4448-19-0x0000000002450000-0x0000000002462000-memory.dmp

Filesize
72KB

Download
memory/4448-18-0x0000000002610000-0x0000000002666000-memory.dmp

Filesize
344KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads