dcrat | f3c0ce87c47d8a905458f935d7e1f09492dcc0e9e3d921d99391d7226961eb5d

General

Target

13f834e84beb9208eaba2a22a286bcf7.exe
Size

1.5MB
MD5

13f834e84beb9208eaba2a22a286bcf7
SHA1

0c362d1880081df5e1101f2f6d5c60f29d5a2f8d
SHA256

f3c0ce87c47d8a905458f935d7e1f09492dcc0e9e3d921d99391d7226961eb5d
SHA512

f18801e6691980f17d4fe29c59db74084b78c3d203406803380f3d477ef337c5c9828bde585be04ea5646880d12e149af0da19c9eae77917463d4e015e23300c

Score

10^/10

dcrat infostealer rat spyware stealer suricata

Malware Config

Signatures

DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat
suricata: ET MALWARE DCRAT Activity (GET)
suricata: ET MALWARE DCRAT Activity (GET)
suricata

DCRat Payload 4 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
\chainreview\.exe	dcrat
\chainreview\.exe	dcrat
C:\chainreview\.exe	dcrat
C:\chainreview\.exe	dcrat

Executes dropped EXE 1 IoCs

Processes:

.exe

pid process

1724 .exe
Loads dropped DLL 2 IoCs

Processes:

cmd.exe

pid process

2012 cmd.exe
2012 cmd.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

.exe

pid process

1724 .exe
1724 .exe
1724 .exe
1724 .exe
1724 .exe
1724 .exe
1724 .exe
1724 .exe
1724 .exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

.exe

description pid process

Token: SeDebugPrivilege 1724 .exe

pid	process
1724	.exe

pid	process
2012	cmd.exe
2012	cmd.exe

pid	process
1724	.exe
1724	.exe
1724	.exe
1724	.exe
1724	.exe
1724	.exe
1724	.exe
1724	.exe
1724	.exe

description	pid	process
Token: SeDebugPrivilege	1724	.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

13f834e84beb9208eaba2a22a286bcf7.exeWScript.execmd.exe

description	pid	process	target process
PID 1048 wrote to memory of 1016	1048	13f834e84beb9208eaba2a22a286bcf7.exe	WScript.exe
PID 1048 wrote to memory of 1016	1048	13f834e84beb9208eaba2a22a286bcf7.exe	WScript.exe
PID 1048 wrote to memory of 1016	1048	13f834e84beb9208eaba2a22a286bcf7.exe	WScript.exe
PID 1048 wrote to memory of 1016	1048	13f834e84beb9208eaba2a22a286bcf7.exe	WScript.exe
PID 1016 wrote to memory of 2012	1016	WScript.exe	cmd.exe
PID 1016 wrote to memory of 2012	1016	WScript.exe	cmd.exe
PID 1016 wrote to memory of 2012	1016	WScript.exe	cmd.exe
PID 1016 wrote to memory of 2012	1016	WScript.exe	cmd.exe
PID 2012 wrote to memory of 1724	2012	cmd.exe	.exe
PID 2012 wrote to memory of 1724	2012	cmd.exe	.exe
PID 2012 wrote to memory of 1724	2012	cmd.exe	.exe
PID 2012 wrote to memory of 1724	2012	cmd.exe	.exe

C:\Users\Admin\AppData\Local\Temp\13f834e84beb9208eaba2a22a286bcf7.exe
"C:\Users\Admin\AppData\Local\Temp\13f834e84beb9208eaba2a22a286bcf7.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1048

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\chainreview\egcCNJVTMxQySQYjogVX.vbe"
2⤵
- Suspicious use of WriteProcessMemory
PID:1016

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\chainreview\eQccdYwIKR90euD5Q0oan5EPG84.bat" "
3⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2012

C:\chainreview\.exe
"C:\chainreview\.exe"
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1724

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\chainreview\.exe
Filesize
1.1MB

MD5
bab21aac84fcbf6ff5639c699b8e5273

SHA1
baa4a9333d2ebfdd521780c65f9e11c516877a82

SHA256
6e8a5bb847809a8171cc71ca1607cda9e464e73bf845bc06873ab477a6e366e6

SHA512
3dcdbf6f2c65701e5fb36a13471fbeff74c85d4318fffe1b120c1ec9a5d6a9a5f1f565fae0a8d8a02be75e9c8d53878ad686b1895e3b908ad4ad03044dd0f529

Download Submit
C:\chainreview\.exe
Filesize
1.1MB

MD5
bab21aac84fcbf6ff5639c699b8e5273

SHA1
baa4a9333d2ebfdd521780c65f9e11c516877a82

SHA256
6e8a5bb847809a8171cc71ca1607cda9e464e73bf845bc06873ab477a6e366e6

SHA512
3dcdbf6f2c65701e5fb36a13471fbeff74c85d4318fffe1b120c1ec9a5d6a9a5f1f565fae0a8d8a02be75e9c8d53878ad686b1895e3b908ad4ad03044dd0f529

Download Submit
C:\chainreview\eQccdYwIKR90euD5Q0oan5EPG84.bat
Filesize
21B

MD5
4b2d709c097bcecdacf548330a0f2704

SHA1
d2adee306617f4846b31727e1c03289d425fa8bb

SHA256
b4c73df97e2777d089313540a743479457b2098566588ce2ba541bb48c4a3c4b

SHA512
3043fc7b83d03788f5af852009571fe617e568514e3fcbd1f400e0f354fb0697257e540a708d049b7ab8e970588ec5d01d3e4a7fc444cd7eddaeddcc9e68c331

Download Submit
C:\chainreview\egcCNJVTMxQySQYjogVX.vbe
Filesize
215B

MD5
fa51d6a3e958b8acbc6ef0c9d3b94315

SHA1
39235af0f705b2fb0d8ae2bf52b5a5eaf234e154

SHA256
2ed582be651c6a9310418da72e95ae630639ed42782d0875d5877ccd15992a7e

SHA512
746c3f22ea7b06ad00bafbadcfaa2967515ac78e46a207916191dab586ff1339505c1a5acf39493f588a27122f6fea4b5265b8317f41e499c1a97ee0edfb7722

Download Submit
\chainreview\.exe
Filesize
1.1MB

MD5
bab21aac84fcbf6ff5639c699b8e5273

SHA1
baa4a9333d2ebfdd521780c65f9e11c516877a82

SHA256
6e8a5bb847809a8171cc71ca1607cda9e464e73bf845bc06873ab477a6e366e6

SHA512
3dcdbf6f2c65701e5fb36a13471fbeff74c85d4318fffe1b120c1ec9a5d6a9a5f1f565fae0a8d8a02be75e9c8d53878ad686b1895e3b908ad4ad03044dd0f529

Download Submit
\chainreview\.exe
Filesize
1.1MB

MD5
bab21aac84fcbf6ff5639c699b8e5273

SHA1
baa4a9333d2ebfdd521780c65f9e11c516877a82

SHA256
6e8a5bb847809a8171cc71ca1607cda9e464e73bf845bc06873ab477a6e366e6

SHA512
3dcdbf6f2c65701e5fb36a13471fbeff74c85d4318fffe1b120c1ec9a5d6a9a5f1f565fae0a8d8a02be75e9c8d53878ad686b1895e3b908ad4ad03044dd0f529

Download Submit
memory/1016-55-0x0000000000000000-mapping.dmp

Download
memory/1048-54-0x0000000075C51000-0x0000000075C53000-memory.dmp

Filesize
8KB

Download
memory/1724-63-0x0000000000000000-mapping.dmp

Download
memory/1724-65-0x0000000001250000-0x000000000137C000-memory.dmp

Filesize
1.2MB

Download
memory/1724-66-0x0000000000440000-0x000000000045C000-memory.dmp

Filesize
112KB

Download
memory/1724-67-0x00000000002B0000-0x00000000002C2000-memory.dmp

Filesize
72KB

Download
memory/1724-68-0x0000000000480000-0x000000000048E000-memory.dmp

Filesize
56KB

Download
memory/2012-59-0x0000000000000000-mapping.dmp

Download

Analysis

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