dcrat | 1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c19

General

Target

1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c19.exe
Size

828KB
MD5

46ab1dde1bac98a34cb41166f659db27
SHA1

f12b50ad32d9290d977322c7fb9594ac54d7b64a
SHA256

1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c19
SHA512

4890f12e5fbd6f928936ccc2e2cd67414e339d4f2058b84a5cee73ad7600bc2dc5bf0368581781c047620abfa4df9e3fddcb9185f88222d574d6503f67d897b9
SSDEEP

12288:gF+JPdVQB7gH+F44vYVYJ21H3z2oLtubNUPX08fab:gFcVU7gG44vYVH1H/obyCb

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 15 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	2632	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1108	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2664	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2628	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2728	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2320	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2660	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	588	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	792	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1000	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1432	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2596	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2224	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2160	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2056	2768	schtasks.exe	30

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2816-1-0x0000000000170000-0x0000000000246000-memory.dmp	dcrat
behavioral1/files/0x00050000000194bd-11.dat	dcrat
behavioral1/memory/1572-21-0x00000000011E0000-0x00000000012B6000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
1572	csrss.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\MSBuild\c5b4cb5e9653cc	1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c19.exe
File created	C:\Program Files\MSBuild\services.exe	1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c19.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 15 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2160	schtasks.exe
2628	schtasks.exe
2320	schtasks.exe
2596	schtasks.exe
2632	schtasks.exe
2056	schtasks.exe
588	schtasks.exe
1432	schtasks.exe
2224	schtasks.exe
2660	schtasks.exe
792	schtasks.exe
1000	schtasks.exe
1108	schtasks.exe
2664	schtasks.exe
2728	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2816	1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c19.exe
1572	csrss.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2816	1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c19.exe
Token: SeDebugPrivilege	1572	csrss.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2816 wrote to memory of 2140	2816	1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c19.exe	46
PID 2816 wrote to memory of 2140	2816	1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c19.exe	46
PID 2816 wrote to memory of 2140	2816	1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c19.exe	46
PID 2140 wrote to memory of 1976	2140	cmd.exe	48
PID 2140 wrote to memory of 1976	2140	cmd.exe	48
PID 2140 wrote to memory of 1976	2140	cmd.exe	48
PID 2140 wrote to memory of 1572	2140	cmd.exe	49
PID 2140 wrote to memory of 1572	2140	cmd.exe	49
PID 2140 wrote to memory of 1572	2140	cmd.exe	49

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\1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c19.exe
"C:\Users\Admin\AppData\Local\Temp\1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c19.exe"
1⤵
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2816
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\Lvqyh5QgiF.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2140
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:1976
- - C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\csrss.exe
    "C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\csrss.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1572

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2632

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1108

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2664

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 6 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\taskhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2628

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2728

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 7 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2320

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 12 /tr "'C:\Program Files\MSBuild\services.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2660

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Program Files\MSBuild\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:588

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 9 /tr "'C:\Program Files\MSBuild\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:792

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c191" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c19.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1000

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c19" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c19.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1432

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c191" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c19.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2596

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\explorer.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2224

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\MSOCache\All Users\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2160

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 6 /tr "'C:\MSOCache\All Users\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2056

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\MSOCache\All Users\explorer.exe

Filesize
828KB

MD5
46ab1dde1bac98a34cb41166f659db27

SHA1
f12b50ad32d9290d977322c7fb9594ac54d7b64a

SHA256
1c281aad64e57aed57f78a3a35797381309c161e89e70a6803f3ec166fb29c19

SHA512
4890f12e5fbd6f928936ccc2e2cd67414e339d4f2058b84a5cee73ad7600bc2dc5bf0368581781c047620abfa4df9e3fddcb9185f88222d574d6503f67d897b9

Download Submit
C:\Users\Admin\AppData\Local\Temp\Lvqyh5QgiF.bat

Filesize
223B

MD5
eec589dab331105f5e1c96375d3535fb

SHA1
bd613af1bca9e3f5cf1d45fef4c923a16eb03e2e

SHA256
d267be656ae168c30b890e1c78afb3d16af218ab52f7e43ddd28d3d06c58f558

SHA512
70835d09e38eb6355ed7685af4a8eca67ddf68d9349df0b5dcf95d04b79095b1ff1dfb0c62745a5a4eef28e2906b575a90ec312472d1e37e086b99a5552ba47b

Download Submit
memory/1572-21-0x00000000011E0000-0x00000000012B6000-memory.dmp

Filesize
856KB

Download
memory/2816-0-0x000007FEF6403000-0x000007FEF6404000-memory.dmp

Filesize
4KB

Download
memory/2816-1-0x0000000000170000-0x0000000000246000-memory.dmp

Filesize
856KB

Download
memory/2816-2-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

Filesize
9.9MB

Download
memory/2816-18-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads