dcrat | fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440

Analysis

max time kernel
149s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
14-11-2024 04:36

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General

Target

fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
Size

1.5MB
MD5

3f46b4fc008b1267c97e905c89ca60bf
SHA1

05725fe5083fc1f15d61a052dc5d3bbab3e34742
SHA256

fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440
SHA512

d14ec2b39a4a3c906a3f3575a7e3667df33bcbc113eba0da98a906d94bab9f4ada71b79abfe01db28316035b1d87087518bcfd5bc45c094994b56a8efa603b9a
SSDEEP

24576:MeaMajUi+6C+mDjn7gbkFaSH7Wu4mIWGE1Sy/fBEXTHhaTEEER71RM4I13:Meaj9bHmMbkBHVdGE1Sy/ujhaIh+1

Score

10^/10

dcrat 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
Dcrat family
dcrat

Process spawned unexpected child process 12 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	3312	3996	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3608	3996	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4984	3996	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2780	3996	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4452	3996	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2388	3996	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4052	3996	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4368	3996	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5076	3996	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4792	3996	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2840	3996	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4856	3996	schtasks.exe	84

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/5056-1-0x00000000007F0000-0x000000000097E000-memory.dmp	dcrat
behavioral2/files/0x0009000000023c49-31.dat	dcrat

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe

Executes dropped EXE 1 IoCs

pid	Process
5024	sihost.exe

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows Mail\sihost.exe	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
File opened for modification	C:\Program Files (x86)\Windows Mail\sihost.exe	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
File created	C:\Program Files (x86)\Windows Mail\66fc9ff0ee96c2	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
File opened for modification	C:\Program Files (x86)\Windows Mail\RCX1A5B.tmp	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
File opened for modification	C:\Program Files (x86)\Windows Mail\RCX1A6C.tmp	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe

Drops file in Windows directory 10 IoCs

description	ioc	Process
File created	C:\Windows\Globalization\Time Zone\upfc.exe	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
File created	C:\Windows\IdentityCRL\production\backgroundTaskHost.exe	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
File opened for modification	C:\Windows\Globalization\Time Zone\upfc.exe	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
File opened for modification	C:\Windows\IdentityCRL\production\RCX1E95.tmp	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
File opened for modification	C:\Windows\IdentityCRL\production\RCX1E96.tmp	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
File created	C:\Windows\Globalization\Time Zone\ea1d8f6d871115	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
File created	C:\Windows\IdentityCRL\production\eddb19405b7ce1	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
File opened for modification	C:\Windows\Globalization\Time Zone\RCX1C80.tmp	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
File opened for modification	C:\Windows\Globalization\Time Zone\RCX1C81.tmp	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
File opened for modification	C:\Windows\IdentityCRL\production\backgroundTaskHost.exe	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.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\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 12 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
3608	schtasks.exe
4984	schtasks.exe
2780	schtasks.exe
4052	schtasks.exe
4368	schtasks.exe
4792	schtasks.exe
2840	schtasks.exe
3312	schtasks.exe
4856	schtasks.exe
2388	schtasks.exe
5076	schtasks.exe
4452	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe
5024	sihost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
Token: SeDebugPrivilege	5024	sihost.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 5056 wrote to memory of 5024	5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe	100
PID 5056 wrote to memory of 5024	5056	fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe	100

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\fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe
"C:\Users\Admin\AppData\Local\Temp\fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440.exe"
1⤵
- Drops file in Drivers directory
- 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:5056
- C:\Program Files (x86)\Windows Mail\sihost.exe
  "C:\Program Files (x86)\Windows Mail\sihost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5024

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows Mail\sihost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3312

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Mail\sihost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3608

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows Mail\sihost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4984

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 8 /tr "'C:\Windows\Globalization\Time Zone\upfc.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2780

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Windows\Globalization\Time Zone\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2388

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 14 /tr "'C:\Windows\Globalization\Time Zone\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4452

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 10 /tr "'C:\Windows\IdentityCRL\production\backgroundTaskHost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4052

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Windows\IdentityCRL\production\backgroundTaskHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5076

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 14 /tr "'C:\Windows\IdentityCRL\production\backgroundTaskHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4368

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\AppData\Roaming\Sun\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4792

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Roaming\Sun\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2840

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 5 /tr "'C:\Users\Admin\AppData\Roaming\Sun\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4856

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\RCX174D.tmp

Filesize
1.5MB

MD5
3f46b4fc008b1267c97e905c89ca60bf

SHA1
05725fe5083fc1f15d61a052dc5d3bbab3e34742

SHA256
fc509ede93c53963e746ce703748657aad8ec57542d722ff7f0d26c1eed2e440

SHA512
d14ec2b39a4a3c906a3f3575a7e3667df33bcbc113eba0da98a906d94bab9f4ada71b79abfe01db28316035b1d87087518bcfd5bc45c094994b56a8efa603b9a

Download Submit
memory/5056-12-0x000000001B510000-0x000000001B51C000-memory.dmp

Filesize
48KB

Download
memory/5056-21-0x00007FFF30E40000-0x00007FFF31901000-memory.dmp

Filesize
10.8MB

Download
memory/5056-3-0x000000001B470000-0x000000001B48C000-memory.dmp

Filesize
112KB

Download
memory/5056-6-0x000000001B4B0000-0x000000001B4C0000-memory.dmp

Filesize
64KB

Download
memory/5056-5-0x000000001B490000-0x000000001B498000-memory.dmp

Filesize
32KB

Download
memory/5056-4-0x000000001BB30000-0x000000001BB80000-memory.dmp

Filesize
320KB

Download
memory/5056-7-0x000000001B4C0000-0x000000001B4D6000-memory.dmp

Filesize
88KB

Download
memory/5056-11-0x000000001B500000-0x000000001B508000-memory.dmp

Filesize
32KB

Download
memory/5056-141-0x00007FFF30E40000-0x00007FFF31901000-memory.dmp

Filesize
10.8MB

Download
memory/5056-2-0x00007FFF30E40000-0x00007FFF31901000-memory.dmp

Filesize
10.8MB

Download
memory/5056-8-0x000000001B4E0000-0x000000001B4F0000-memory.dmp

Filesize
64KB

Download
memory/5056-14-0x000000001BC90000-0x000000001BC98000-memory.dmp

Filesize
32KB

Download
memory/5056-15-0x000000001BDA0000-0x000000001BDAC000-memory.dmp

Filesize
48KB

Download
memory/5056-13-0x000000001BC80000-0x000000001BC8E000-memory.dmp

Filesize
56KB

Download
memory/5056-16-0x000000001BEF0000-0x000000001BEF8000-memory.dmp

Filesize
32KB

Download
memory/5056-17-0x000000001BF00000-0x000000001BF0A000-memory.dmp

Filesize
40KB

Download
memory/5056-20-0x00007FFF30E40000-0x00007FFF31901000-memory.dmp

Filesize
10.8MB

Download
memory/5056-0-0x00007FFF30E43000-0x00007FFF30E45000-memory.dmp

Filesize
8KB

Download
memory/5056-1-0x00000000007F0000-0x000000000097E000-memory.dmp

Filesize
1.6MB

Download
memory/5056-9-0x000000001B4F0000-0x000000001B4F8000-memory.dmp

Filesize
32KB

Download