dcrat | f0ac345cd615b9233b1436e380a0130863da5945f7a73a24877210a9ad4bc805

General

Target

7d8db13b60e52fa8f795d68381eb2317.exe
Size

827KB
MD5

7d8db13b60e52fa8f795d68381eb2317
SHA1

cf815f00bf53482199124c6fed99c487f85e1d6e
SHA256

f0ac345cd615b9233b1436e380a0130863da5945f7a73a24877210a9ad4bc805
SHA512

d41f783a057e022bce577b4f90e6f031b86ba459856a532f75fb2a2405c1c30c589afa945278fe30a6b7e2b6115b5aca7756a791556d1f82b959dc06c6435768
SSDEEP

12288:i89kbsLqJ5RqavS3UCBe41kBEsIPtvz4OerNHcaMXb:w4LqJ5RqZ3UCBeYRbTexH8Xb

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	1580	3832	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1356	3832	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1044	3832	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1912	3832	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4596	3832	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1904	3832	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1860	3832	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4208	3832	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2140	3832	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3976	3832	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1196	3832	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2136	3832	schtasks.exe	84

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/4140-1-0x0000000000540000-0x0000000000616000-memory.dmp	dcrat
behavioral2/files/0x0031000000023b71-11.dat	dcrat

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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	7d8db13b60e52fa8f795d68381eb2317.exe

Executes dropped EXE 1 IoCs

pid	Process
844	csrss.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Sidebar\Gadgets\csrss.exe	7d8db13b60e52fa8f795d68381eb2317.exe
File created	C:\Program Files\Windows Sidebar\Gadgets\886983d96e3d3e	7d8db13b60e52fa8f795d68381eb2317.exe
File created	C:\Program Files (x86)\Windows Photo Viewer\TextInputHost.exe	7d8db13b60e52fa8f795d68381eb2317.exe
File created	C:\Program Files (x86)\Windows Photo Viewer\22eafd247d37c3	7d8db13b60e52fa8f795d68381eb2317.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\ServiceProfiles\LocalService\backgroundTaskHost.exe	7d8db13b60e52fa8f795d68381eb2317.exe
File opened for modification	C:\Windows\ServiceProfiles\LocalService\backgroundTaskHost.exe	7d8db13b60e52fa8f795d68381eb2317.exe
File created	C:\Windows\ServiceProfiles\LocalService\eddb19405b7ce1	7d8db13b60e52fa8f795d68381eb2317.exe

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

System Information Discovery
T1082

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
1356	schtasks.exe
1044	schtasks.exe
1912	schtasks.exe
4596	schtasks.exe
1904	schtasks.exe
1860	schtasks.exe
2140	schtasks.exe
1580	schtasks.exe
3976	schtasks.exe
1196	schtasks.exe
2136	schtasks.exe
4208	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4140	7d8db13b60e52fa8f795d68381eb2317.exe
844	csrss.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4140	7d8db13b60e52fa8f795d68381eb2317.exe
Token: SeDebugPrivilege	844	csrss.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4140 wrote to memory of 844	4140	7d8db13b60e52fa8f795d68381eb2317.exe	97
PID 4140 wrote to memory of 844	4140	7d8db13b60e52fa8f795d68381eb2317.exe	97

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\7d8db13b60e52fa8f795d68381eb2317.exe
"C:\Users\Admin\AppData\Local\Temp\7d8db13b60e52fa8f795d68381eb2317.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4140
- C:\Program Files\Windows Sidebar\Gadgets\csrss.exe
  "C:\Program Files\Windows Sidebar\Gadgets\csrss.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:844

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 12 /tr "'C:\Windows\ServiceProfiles\LocalService\backgroundTaskHost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1580

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Windows\ServiceProfiles\LocalService\backgroundTaskHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1356

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 8 /tr "'C:\Windows\ServiceProfiles\LocalService\backgroundTaskHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1044

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Sidebar\Gadgets\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1912

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files\Windows Sidebar\Gadgets\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4596

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\Program Files\Windows Sidebar\Gadgets\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1904

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows Photo Viewer\TextInputHost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1860

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Photo Viewer\TextInputHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4208

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Windows Photo Viewer\TextInputHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2140

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\NetHood\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3976

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Users\Admin\NetHood\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1196

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\NetHood\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2136

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:\Program Files\Windows Sidebar\Gadgets\csrss.exe

Filesize
827KB

MD5
7d8db13b60e52fa8f795d68381eb2317

SHA1
cf815f00bf53482199124c6fed99c487f85e1d6e

SHA256
f0ac345cd615b9233b1436e380a0130863da5945f7a73a24877210a9ad4bc805

SHA512
d41f783a057e022bce577b4f90e6f031b86ba459856a532f75fb2a2405c1c30c589afa945278fe30a6b7e2b6115b5aca7756a791556d1f82b959dc06c6435768

Download Submit
memory/4140-0-0x00007FFDB5643000-0x00007FFDB5645000-memory.dmp

Filesize
8KB

Download
memory/4140-1-0x0000000000540000-0x0000000000616000-memory.dmp

Filesize
856KB

Download
memory/4140-4-0x00007FFDB5640000-0x00007FFDB6101000-memory.dmp

Filesize
10.8MB

Download
memory/4140-22-0x00007FFDB5640000-0x00007FFDB6101000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads