dcrat | 82b8546043bca13cf187119fb68cdabd9ffef9688e16eaff06211d52bb36249b

General

Target

a0fb4af03514fe70e036bbea624ea81f.exe
Size

1.6MB
MD5

a0fb4af03514fe70e036bbea624ea81f
SHA1

435f3ef79e360d89cab884e990a558722c9ce272
SHA256

82b8546043bca13cf187119fb68cdabd9ffef9688e16eaff06211d52bb36249b
SHA512

d3bc4a717f7057b4b2da642c6272f0d357dc0bdf39f898931491e409d4b58790a715138541668a56046c5332178ddb10fc439e5c4d0a7ac6825b82f34e9c268c
SSDEEP

24576:B2G/nvxW3WQnkHnDIlJzbBA5clWJG4kQy0ohgEGdHKK5Cu8Kc9mfCQbZ8/zARp:BbA37kHnDIbzi5MWjmuHNKQbi/E/

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

Process spawned unexpected child process 9 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

description	pid	pid_target	process
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4948	1252	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3348	1252	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4388	1252	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3460	1252	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3284	1252	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3312	1252	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4376	1252	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3692	1252	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4476	1252	schtasks.exe

DCRat payload 6 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
C:\PortfontWin\agentNet.exe	dcrat
C:\PortfontWin\agentNet.exe	dcrat
behavioral2/memory/1080-150-0x00000000007C0000-0x0000000000910000-memory.dmp	dcrat
C:\Users\Admin\dwm.exe	dcrat
C:\Program Files (x86)\WindowsPowerShell\Configuration\Registration\RuntimeBroker.exe	dcrat
C:\Program Files (x86)\WindowsPowerShell\Configuration\Registration\RuntimeBroker.exe	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

Processes:

WScript.exeagentNet.exea0fb4af03514fe70e036bbea624ea81f.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	agentNet.exe
Key value queried	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	a0fb4af03514fe70e036bbea624ea81f.exe

Executes dropped EXE 2 IoCs

Processes:

agentNet.exeRuntimeBroker.exe

pid process

1080 agentNet.exe
2252 RuntimeBroker.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

Drops file in Program Files directory 3 IoCs

Processes:

agentNet.exe

description	ioc	process
File created	C:\Program Files (x86)\WindowsPowerShell\Configuration\Registration\RuntimeBroker.exe	agentNet.exe
File opened for modification	C:\Program Files (x86)\WindowsPowerShell\Configuration\Registration\RuntimeBroker.exe	agentNet.exe
File created	C:\Program Files (x86)\WindowsPowerShell\Configuration\Registration\9e8d7a4ca61bd9	agentNet.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 9 IoCs

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

persistence

Scheduled Task

T1053

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

pid	process
4948	schtasks.exe
3460	schtasks.exe
4376	schtasks.exe
3692	schtasks.exe
4476	schtasks.exe
3348	schtasks.exe
4388	schtasks.exe
3284	schtasks.exe
3312	schtasks.exe

Modifies registry class 1 IoCs

Processes:

a0fb4af03514fe70e036bbea624ea81f.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000_Classes\Local Settings	a0fb4af03514fe70e036bbea624ea81f.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

agentNet.exeRuntimeBroker.exe

pid	process
1080	agentNet.exe
2252	RuntimeBroker.exe
2252	RuntimeBroker.exe
2252	RuntimeBroker.exe
2252	RuntimeBroker.exe
2252	RuntimeBroker.exe
2252	RuntimeBroker.exe
2252	RuntimeBroker.exe
2252	RuntimeBroker.exe
2252	RuntimeBroker.exe
2252	RuntimeBroker.exe
2252	RuntimeBroker.exe
2252	RuntimeBroker.exe
2252	RuntimeBroker.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

RuntimeBroker.exe

pid process

2252 RuntimeBroker.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

agentNet.exeRuntimeBroker.exe

description pid process

Token: SeDebugPrivilege 1080 agentNet.exe
Token: SeDebugPrivilege 2252 RuntimeBroker.exe

pid	process
2252	RuntimeBroker.exe

description	pid	process
Token: SeDebugPrivilege	1080	agentNet.exe
Token: SeDebugPrivilege	2252	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

a0fb4af03514fe70e036bbea624ea81f.exeWScript.execmd.exeagentNet.exe

description	pid	process	target process
PID 5028 wrote to memory of 3492	5028	a0fb4af03514fe70e036bbea624ea81f.exe	WScript.exe
PID 5028 wrote to memory of 3492	5028	a0fb4af03514fe70e036bbea624ea81f.exe	WScript.exe
PID 5028 wrote to memory of 3492	5028	a0fb4af03514fe70e036bbea624ea81f.exe	WScript.exe
PID 5028 wrote to memory of 212	5028	a0fb4af03514fe70e036bbea624ea81f.exe	WScript.exe
PID 5028 wrote to memory of 212	5028	a0fb4af03514fe70e036bbea624ea81f.exe	WScript.exe
PID 5028 wrote to memory of 212	5028	a0fb4af03514fe70e036bbea624ea81f.exe	WScript.exe
PID 3492 wrote to memory of 4112	3492	WScript.exe	cmd.exe
PID 3492 wrote to memory of 4112	3492	WScript.exe	cmd.exe
PID 3492 wrote to memory of 4112	3492	WScript.exe	cmd.exe
PID 4112 wrote to memory of 1080	4112	cmd.exe	agentNet.exe
PID 4112 wrote to memory of 1080	4112	cmd.exe	agentNet.exe
PID 1080 wrote to memory of 2252	1080	agentNet.exe	RuntimeBroker.exe
PID 1080 wrote to memory of 2252	1080	agentNet.exe	RuntimeBroker.exe

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\a0fb4af03514fe70e036bbea624ea81f.exe
"C:\Users\Admin\AppData\Local\Temp\a0fb4af03514fe70e036bbea624ea81f.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:5028

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\PortfontWin\faioFQaWMfyQql5F1lpCdLP.vbe"
2⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3492

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\PortfontWin\ItIWhmVbvimfR.bat" "
3⤵
- Suspicious use of WriteProcessMemory
PID:4112

C:\PortfontWin\agentNet.exe
"C:\PortfontWin\agentNet.exe"
4⤵
- Checks computer location settings
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1080

C:\Program Files (x86)\WindowsPowerShell\Configuration\Registration\RuntimeBroker.exe
"C:\Program Files (x86)\WindowsPowerShell\Configuration\Registration\RuntimeBroker.exe"
5⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:2252

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\PortfontWin\file.vbs"
2⤵
PID:212

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\WindowsPowerShell\Configuration\Registration\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4948

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\WindowsPowerShell\Configuration\Registration\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3348

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\WindowsPowerShell\Configuration\Registration\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4388

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 5 /tr "'C:\Users\Admin\dwm.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3460

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Users\Admin\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3284

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 10 /tr "'C:\Users\Admin\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3312

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 11 /tr "'C:\Users\Default User\System.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4376

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Users\Default User\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3692

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 5 /tr "'C:\Users\Default User\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4476

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\PortfontWin\ItIWhmVbvimfR.bat
Filesize
29B

MD5
fd0d6ddda55e2608a242669717a0d517

SHA1
294004545081c4634c07f7cca31819207588c310

SHA256
dd0a8c6636afc291a09f480b9294860f6412555b0bfda3808917eff3637a005d

SHA512
d23fddbf26c32b50c3fe3eb654da3ac25e84b7d5bf3501c682bac74f39295a58c1072dd02b97e340a0ec28e30c58ed1bb1448badb5e680baea4d6bce769215a0

Download Submit
C:\PortfontWin\agentNet.exe
Filesize
1.3MB

MD5
cd663693d7804e051bd4d890a643a521

SHA1
186510d39cc3a7d928f47c3d6813c27c5e7e3674

SHA256
f950a9b3a3930c29d9fadeee93d8e25d5771008c0f0ed492616802977b4fb873

SHA512
a5a5be5ad57ea6eb18ec7ad8d0ae73f7867c10b6c34ce7152daeef8a99206ddca0fc121ba90a939b39aada01e313de1254dfdaf3e5f20769a8d7ba5254174c0e

Download Submit
C:\PortfontWin\agentNet.exe
Filesize
1.3MB

MD5
cd663693d7804e051bd4d890a643a521

SHA1
186510d39cc3a7d928f47c3d6813c27c5e7e3674

SHA256
f950a9b3a3930c29d9fadeee93d8e25d5771008c0f0ed492616802977b4fb873

SHA512
a5a5be5ad57ea6eb18ec7ad8d0ae73f7867c10b6c34ce7152daeef8a99206ddca0fc121ba90a939b39aada01e313de1254dfdaf3e5f20769a8d7ba5254174c0e

Download Submit
C:\PortfontWin\faioFQaWMfyQql5F1lpCdLP.vbe
Filesize
201B

MD5
d82d15119bf0f8e8e3077d786bcbbefb

SHA1
92a74c59f2984d8f7f9fcd22f44c463cc0177cbd

SHA256
1be73a1a92fa60e7ec1ab2b7777780d7f958c284b4c1596ea9ab5c3ad581e76f

SHA512
9aaa9dd3906c1b531b9c85f61b9da3d11f458f7eba22a4107fa4ed49868b45f1d0f804296f1ef35c62115d77204b99c235c9e6f504b65d752caf3f58c44eacaa

Download Submit
C:\PortfontWin\file.vbs
Filesize
34B

MD5
677cc4360477c72cb0ce00406a949c61

SHA1
b679e8c3427f6c5fc47c8ac46cd0e56c9424de05

SHA256
f1cccb5ae4aa51d293bd3c7d2a1a04cb7847d22c5db8e05ac64e9a6d7455aa0b

SHA512
7cfe2cc92f9e659f0a15a295624d611b3363bd01eb5bcf9bc7681ea9b70b0564d192d570d294657c8dc2c93497fa3b4526c975a9bf35d69617c31d9936573c6a

Download Submit
C:\Program Files (x86)\WindowsPowerShell\Configuration\Registration\RuntimeBroker.exe
Filesize
1.3MB

MD5
cd663693d7804e051bd4d890a643a521

SHA1
186510d39cc3a7d928f47c3d6813c27c5e7e3674

SHA256
f950a9b3a3930c29d9fadeee93d8e25d5771008c0f0ed492616802977b4fb873

SHA512
a5a5be5ad57ea6eb18ec7ad8d0ae73f7867c10b6c34ce7152daeef8a99206ddca0fc121ba90a939b39aada01e313de1254dfdaf3e5f20769a8d7ba5254174c0e

Download Submit
C:\Program Files (x86)\WindowsPowerShell\Configuration\Registration\RuntimeBroker.exe
Filesize
1.3MB

MD5
cd663693d7804e051bd4d890a643a521

SHA1
186510d39cc3a7d928f47c3d6813c27c5e7e3674

SHA256
f950a9b3a3930c29d9fadeee93d8e25d5771008c0f0ed492616802977b4fb873

SHA512
a5a5be5ad57ea6eb18ec7ad8d0ae73f7867c10b6c34ce7152daeef8a99206ddca0fc121ba90a939b39aada01e313de1254dfdaf3e5f20769a8d7ba5254174c0e

Download Submit
C:\Users\Admin\dwm.exe
Filesize
1.3MB

MD5
cd663693d7804e051bd4d890a643a521

SHA1
186510d39cc3a7d928f47c3d6813c27c5e7e3674

SHA256
f950a9b3a3930c29d9fadeee93d8e25d5771008c0f0ed492616802977b4fb873

SHA512
a5a5be5ad57ea6eb18ec7ad8d0ae73f7867c10b6c34ce7152daeef8a99206ddca0fc121ba90a939b39aada01e313de1254dfdaf3e5f20769a8d7ba5254174c0e

Download Submit
memory/1080-150-0x00000000007C0000-0x0000000000910000-memory.dmp

Filesize
1.3MB

Download
memory/1080-151-0x000000001CAD0000-0x000000001CAE0000-memory.dmp

Filesize
64KB

Download
memory/1080-152-0x000000001CA50000-0x000000001CAA0000-memory.dmp

Filesize
320KB

Download
memory/1080-153-0x000000001D7B0000-0x000000001DCD8000-memory.dmp

Filesize
5.2MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads