dcrat | 1a2c4765e2375e115b244e5e46a351f7b07ca72ff036119a3383af8dc1d9f740

Analysis

max time kernel
138s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
04/06/2024, 21:53

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General

Target
09c6751d13377e2972d9fe18d58c6e70_NeikiAnalytics.exe
Size 1.2MB
Sample240604-1r5evsde83
SHA256 1a2c4765e2375e115b244e5e46a351f7b07ca72ff036119a3383af8dc1d9f740
MD5 09c6751d13377e2972d9fe18d58c6e70
SHA1 d8ec083f1f05a073cb4e8ca39fda01026fa97b91
SHA512 a5d590d990261711c0f084871af229e75b167c0927bf1dd34ce470f42af811f076737a7524410082150cdea012cd8ed2a41a68f45cf282c00012ecce30040314
SSDEEP 24576:tYLURWz/hH5IpnmVQRvs21jRS/gI+vwnmSBMuS:tKJ/hwlHEgBomSBMu
MD5 SHA1 SHA512 SSDEEP

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

Process spawned unexpected child process 18 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	1292	4568	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3332	4568	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5052	4568	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4928	4568	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1620	4568	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4008	4568	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3956	4568	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1108	4568	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4088	4568	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1608	4568	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4072	4568	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2020	4568	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2088	4568	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1416	4568	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2252	4568	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2340	4568	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4824	4568	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2384	4568	schtasks.exe	83

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/5104-1-0x00000000005A0000-0x00000000006D2000-memory.dmp	dcrat
behavioral2/files/0x000700000002341d-15.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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	09c6751d13377e2972d9fe18d58c6e70_NeikiAnalytics.exe

Executes dropped EXE 1 IoCs

pid	Process
2784	Idle.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.0\9e8d7a4ca61bd9	09c6751d13377e2972d9fe18d58c6e70_NeikiAnalytics.exe
File created	C:\Program Files\Windows Mail\Idle.exe	09c6751d13377e2972d9fe18d58c6e70_NeikiAnalytics.exe
File created	C:\Program Files\Windows Mail\6ccacd8608530f	09c6751d13377e2972d9fe18d58c6e70_NeikiAnalytics.exe
File created	C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.0\RuntimeBroker.exe	09c6751d13377e2972d9fe18d58c6e70_NeikiAnalytics.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Registration\CRMLog\RuntimeBroker.exe	09c6751d13377e2972d9fe18d58c6e70_NeikiAnalytics.exe
File created	C:\Windows\Registration\CRMLog\9e8d7a4ca61bd9	09c6751d13377e2972d9fe18d58c6e70_NeikiAnalytics.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 18 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
3332	schtasks.exe
5052	schtasks.exe
2252	schtasks.exe
4008	schtasks.exe
3956	schtasks.exe
4072	schtasks.exe
2088	schtasks.exe
2340	schtasks.exe
4928	schtasks.exe
1108	schtasks.exe
2020	schtasks.exe
4824	schtasks.exe
2384	schtasks.exe
1292	schtasks.exe
1620	schtasks.exe
4088	schtasks.exe
1608	schtasks.exe
1416	schtasks.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000_Classes\Local Settings	09c6751d13377e2972d9fe18d58c6e70_NeikiAnalytics.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5104	09c6751d13377e2972d9fe18d58c6e70_NeikiAnalytics.exe
5104	09c6751d13377e2972d9fe18d58c6e70_NeikiAnalytics.exe
5104	09c6751d13377e2972d9fe18d58c6e70_NeikiAnalytics.exe
2784	Idle.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5104	09c6751d13377e2972d9fe18d58c6e70_NeikiAnalytics.exe
Token: SeDebugPrivilege	2784	Idle.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5104 wrote to memory of 4380	5104	09c6751d13377e2972d9fe18d58c6e70_NeikiAnalytics.exe	102
PID 5104 wrote to memory of 4380	5104	09c6751d13377e2972d9fe18d58c6e70_NeikiAnalytics.exe	102
PID 4380 wrote to memory of 4612	4380	cmd.exe	104
PID 4380 wrote to memory of 4612	4380	cmd.exe	104
PID 4380 wrote to memory of 2784	4380	cmd.exe	115
PID 4380 wrote to memory of 2784	4380	cmd.exe	115

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\09c6751d13377e2972d9fe18d58c6e70_NeikiAnalytics.exe
"C:\Users\Admin\AppData\Local\Temp\09c6751d13377e2972d9fe18d58c6e70_NeikiAnalytics.exe"
1⤵
- 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:5104
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\KE7kDk76vz.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4380
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:4612
- - C:\Program Files\Windows Mail\Idle.exe
    "C:\Program Files\Windows Mail\Idle.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2784

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 5 /tr "'C:\Users\Default\Cookies\taskhostw.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1292

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Users\Default\Cookies\taskhostw.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3332

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 11 /tr "'C:\Users\Default\Cookies\taskhostw.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:5052

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4928

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1620

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4008

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 7 /tr "'C:\Windows\Registration\CRMLog\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3956

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\Registration\CRMLog\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1108

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 11 /tr "'C:\Windows\Registration\CRMLog\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4088

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 13 /tr "'C:\Program Files\Windows Mail\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1608

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files\Windows Mail\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4072

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 14 /tr "'C:\Program Files\Windows Mail\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2020

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 14 /tr "'C:\Users\Default\Cookies\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2088

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Users\Default\Cookies\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1416

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\Users\Default\Cookies\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2252

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.0\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2340

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.0\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4824

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.0\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2384

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

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

KE7kDk76vz.bat

Path C:\Users\Admin\AppData\Local\Temp\KE7kDk76vz.bat
Size 203B
SHA256 4d60dbbdeb0952715362f17e51dbbf03545076b47b0e3ff2126756e29a50d9b6
MD5 7a2d969c4d9bedbdc00621da81c189cc
SHA1 38818e05d3d97985ac0ab921e6e2c6f5f593e3de
SHA512 80d4bc681f1fe484d02755bacd40fb757863235473ee3e0a7308a9bdb6697a59de322fa7f7c88a7e7d748ea7c5223feb93b0e95da15879b0bf7be67528d89cc0
MD5 SHA1 SHA512

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csrss.exe

Path C:\Users\Default\AppData\Local\Microsoft\Windows\INetCookies\csrss.exe
Size 1.2MB
SHA256 1a2c4765e2375e115b244e5e46a351f7b07ca72ff036119a3383af8dc1d9f740
MD5 09c6751d13377e2972d9fe18d58c6e70
SHA1 d8ec083f1f05a073cb4e8ca39fda01026fa97b91
SHA512 a5d590d990261711c0f084871af229e75b167c0927bf1dd34ce470f42af811f076737a7524410082150cdea012cd8ed2a41a68f45cf282c00012ecce30040314
SSDEEP 24576:tYLURWz/hH5IpnmVQRvs21jRS/gI+vwnmSBMuS:tKJ/hwlHEgBomSBMu
MD5 SHA1 SHA512 SSDEEP

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memory/5104-1-0x00000000005A0000-0x00000000006D2000-memory.dmp

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memory/5104-0-0x00007FFDAE393000-0x00007FFDAE395000-memory.dmp

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memory/5104-2-0x00007FFDAE390000-0x00007FFDAEE51000-memory.dmp

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memory/5104-3-0x0000000000EF0000-0x0000000000F0C000-memory.dmp

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memory/5104-6-0x0000000000F10000-0x0000000000F1C000-memory.dmp

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memory/5104-5-0x0000000001220000-0x0000000001236000-memory.dmp

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memory/5104-4-0x000000001B300000-0x000000001B350000-memory.dmp

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memory/5104-24-0x00007FFDAE390000-0x00007FFDAEE51000-memory.dmp

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