dcrat | 9b08f03985d3378123ba236fae1b41b42fcc9af87932655a5120e04fa9a21942

Analysis

max time kernel
138s
max time network
153s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
30-10-2024 04:21

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General

Target

844679E76D8254BEDD67C98610F7D7AC.exe
Size

1.6MB
MD5

844679e76d8254bedd67c98610f7d7ac
SHA1

4222ebbb055830096b829f072783423dbe255932
SHA256

9b08f03985d3378123ba236fae1b41b42fcc9af87932655a5120e04fa9a21942
SHA512

fddb80736936d7c0d46ec3958885237681cbbd416455d7a48d075092d38a0c5e435112c25b595b8cc99b0a8ed2143ac2f28e893373a7b6e9772ee722706a3c05
SSDEEP

24576:2ztKoZmCJ4YrujnaOBDEzKt3pJqc7BnA8js2TvgAts0qB0FjbpcKSzQy8v1:O995MUzKNac7BnbbTvgCFTYQy+

Score

10^/10

dcrat discovery 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 18 IoCs

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

Processes:

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

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2700	2936	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1016	2936	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2672	2936	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2740	2936	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2064	2936	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1456	2936	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2744	2936	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2148	2936	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2620	2936	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2068	2936	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2412	2936	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2664	2936	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2968	2936	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2372	2936	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1404	2936	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1148	2936	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2176	2936	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1968	2936	schtasks.exe	30

Executes dropped EXE 1 IoCs

Processes:

lsm.exe

pid	Process
1916	lsm.exe

Drops file in Windows directory 2 IoCs

Processes:

844679E76D8254BEDD67C98610F7D7AC.exe

description	ioc	Process
File created	C:\Windows\addins\csrss.exe	844679E76D8254BEDD67C98610F7D7AC.exe
File created	C:\Windows\addins\886983d96e3d3e	844679E76D8254BEDD67C98610F7D7AC.exe

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

System Information Discovery
T1082

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

Processes:

PING.EXE

pid	Process
2368	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
2368	PING.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

Processes:

pid	Process
2968	schtasks.exe
1016	schtasks.exe
2176	schtasks.exe
2664	schtasks.exe
2700	schtasks.exe
2672	schtasks.exe
2740	schtasks.exe
2064	schtasks.exe
1456	schtasks.exe
2148	schtasks.exe
2068	schtasks.exe
2372	schtasks.exe
1148	schtasks.exe
1968	schtasks.exe
2744	schtasks.exe
2620	schtasks.exe
2412	schtasks.exe
1404	schtasks.exe

Suspicious behavior: EnumeratesProcesses 56 IoCs

Processes:

844679E76D8254BEDD67C98610F7D7AC.exelsm.exe

pid	Process
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1612	844679E76D8254BEDD67C98610F7D7AC.exe
1916	lsm.exe
1916	lsm.exe
1916	lsm.exe
1916	lsm.exe
1916	lsm.exe
1916	lsm.exe
1916	lsm.exe
1916	lsm.exe
1916	lsm.exe
1916	lsm.exe
1916	lsm.exe
1916	lsm.exe
1916	lsm.exe
1916	lsm.exe
1916	lsm.exe
1916	lsm.exe
1916	lsm.exe
1916	lsm.exe
1916	lsm.exe
1916	lsm.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

lsm.exe

pid	Process
1916	lsm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

844679E76D8254BEDD67C98610F7D7AC.exelsm.exe

description	pid	Process
Token: SeDebugPrivilege	1612	844679E76D8254BEDD67C98610F7D7AC.exe
Token: SeDebugPrivilege	1916	lsm.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

844679E76D8254BEDD67C98610F7D7AC.execmd.exe

description	pid	Process	procid_target
PID 1612 wrote to memory of 572	1612	844679E76D8254BEDD67C98610F7D7AC.exe	49
PID 1612 wrote to memory of 572	1612	844679E76D8254BEDD67C98610F7D7AC.exe	49
PID 1612 wrote to memory of 572	1612	844679E76D8254BEDD67C98610F7D7AC.exe	49
PID 572 wrote to memory of 2380	572	cmd.exe	51
PID 572 wrote to memory of 2380	572	cmd.exe	51
PID 572 wrote to memory of 2380	572	cmd.exe	51
PID 572 wrote to memory of 2368	572	cmd.exe	52
PID 572 wrote to memory of 2368	572	cmd.exe	52
PID 572 wrote to memory of 2368	572	cmd.exe	52
PID 572 wrote to memory of 1916	572	cmd.exe	53
PID 572 wrote to memory of 1916	572	cmd.exe	53
PID 572 wrote to memory of 1916	572	cmd.exe	53

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\844679E76D8254BEDD67C98610F7D7AC.exe
"C:\Users\Admin\AppData\Local\Temp\844679E76D8254BEDD67C98610F7D7AC.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1612
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\C2altafIJV.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:572
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2380
- - C:\Windows\system32\PING.EXE
    ping -n 10 localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2368
- - C:\Recovery\31f19e42-8726-11ef-be9a-dab21757c799\lsm.exe
    "C:\Recovery\31f19e42-8726-11ef-be9a-dab21757c799\lsm.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    PID:1916

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 14 /tr "'C:\Users\Public\Libraries\sppsvc.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2700

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Users\Public\Libraries\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1016

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 10 /tr "'C:\Users\Public\Libraries\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2672

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 11 /tr "'C:\Recovery\31f19e42-8726-11ef-be9a-dab21757c799\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2740

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Recovery\31f19e42-8726-11ef-be9a-dab21757c799\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2064

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 14 /tr "'C:\Recovery\31f19e42-8726-11ef-be9a-dab21757c799\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1456

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\Windows\addins\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2744

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\addins\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2148

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 12 /tr "'C:\Windows\addins\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2620

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 7 /tr "'C:\Recovery\31f19e42-8726-11ef-be9a-dab21757c799\lsm.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2068

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Recovery\31f19e42-8726-11ef-be9a-dab21757c799\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2412

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 13 /tr "'C:\Recovery\31f19e42-8726-11ef-be9a-dab21757c799\lsm.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 "WmiPrvSEW" /sc MINUTE /mo 11 /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\WmiPrvSE.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2968

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2372

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 5 /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1404

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "844679E76D8254BEDD67C98610F7D7AC8" /sc MINUTE /mo 8 /tr "'C:\Users\Admin\AppData\Local\Temp\844679E76D8254BEDD67C98610F7D7AC.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1148

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "844679E76D8254BEDD67C98610F7D7AC" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\844679E76D8254BEDD67C98610F7D7AC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2176

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "844679E76D8254BEDD67C98610F7D7AC8" /sc MINUTE /mo 9 /tr "'C:\Users\Admin\AppData\Local\Temp\844679E76D8254BEDD67C98610F7D7AC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1968

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

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\C2altafIJV.bat

Filesize
184B

MD5
f21dd176623ca9d1164583d4a03accba

SHA1
08cee36ddfd20f7833e85659f4f412862ca5d884

SHA256
e320646220b529eaa22cf7a39448dd561d3a40aa41b1522987b13d3ea5ba82a6

SHA512
83f684f1d257ce72c87fc95535855d3ffafc37b9cecf0c1cffb5f6475cd183988f91eeab7dd0e8f4ca3e61e43bca0b308404d5095a4d9bcf0636e844073b77bd

Download Submit
C:\Users\Public\Libraries\sppsvc.exe

Filesize
1.6MB

MD5
844679e76d8254bedd67c98610f7d7ac

SHA1
4222ebbb055830096b829f072783423dbe255932

SHA256
9b08f03985d3378123ba236fae1b41b42fcc9af87932655a5120e04fa9a21942

SHA512
fddb80736936d7c0d46ec3958885237681cbbd416455d7a48d075092d38a0c5e435112c25b595b8cc99b0a8ed2143ac2f28e893373a7b6e9772ee722706a3c05

Download Submit
memory/1612-7-0x0000000000B10000-0x0000000000B1E000-memory.dmp

Filesize
56KB

Download
memory/1612-3-0x000007FEF6BB0000-0x000007FEF759C000-memory.dmp

Filesize
9.9MB

Download
memory/1612-4-0x000007FEF6BB0000-0x000007FEF759C000-memory.dmp

Filesize
9.9MB

Download
memory/1612-5-0x000007FEF6BB0000-0x000007FEF759C000-memory.dmp

Filesize
9.9MB

Download
memory/1612-0-0x000007FEF6BB3000-0x000007FEF6BB4000-memory.dmp

Filesize
4KB

Download
memory/1612-8-0x000007FEF6BB0000-0x000007FEF759C000-memory.dmp

Filesize
9.9MB

Download
memory/1612-2-0x000007FEF6BB0000-0x000007FEF759C000-memory.dmp

Filesize
9.9MB

Download
memory/1612-20-0x000007FEF6BB3000-0x000007FEF6BB4000-memory.dmp

Filesize
4KB

Download
memory/1612-21-0x000007FEF6BB0000-0x000007FEF759C000-memory.dmp

Filesize
9.9MB

Download
memory/1612-1-0x0000000000BD0000-0x0000000000D72000-memory.dmp

Filesize
1.6MB

Download
memory/1612-27-0x000007FEF6BB0000-0x000007FEF759C000-memory.dmp

Filesize
9.9MB

Download
memory/1916-30-0x0000000000120000-0x00000000002C2000-memory.dmp

Filesize
1.6MB

Download