dcrat | f3c0ce87c47d8a905458f935d7e1f09492dcc0e9e3d921d99391d7226961eb5d

Analysis

max time kernel
60s
max time network
150s
platform
windows7_x64
resource
win7-20220414-en
submitted
13/05/2022, 04:07

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General

Target
13f834e84beb9208eaba2a22a286bcf7.exe
Size 1.5MB
Sample220513-epmldaccb8
SHA256 f3c0ce87c47d8a905458f935d7e1f09492dcc0e9e3d921d99391d7226961eb5d
MD5 13f834e84beb9208eaba2a22a286bcf7
SHA1 0c362d1880081df5e1101f2f6d5c60f29d5a2f8d
SHA512 f18801e6691980f17d4fe29c59db74084b78c3d203406803380f3d477ef337c5c9828bde585be04ea5646880d12e149af0da19c9eae77917463d4e015e23300c
MD5 SHA1 SHA512

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

resource	yara_rule
behavioral1/files/0x00090000000122f6-60.dat	dcrat
behavioral1/files/0x00090000000122f6-62.dat	dcrat
behavioral1/files/0x00090000000122f6-61.dat	dcrat
behavioral1/files/0x00090000000122f6-64.dat	dcrat

Executes dropped EXE 1 IoCs

pid	Process
1724	.exe

Loads dropped DLL 2 IoCs

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

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

description	pid	Process
Token: SeDebugPrivilege	1724	.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1048 wrote to memory of 1016	1048	13f834e84beb9208eaba2a22a286bcf7.exe	28
PID 1048 wrote to memory of 1016	1048	13f834e84beb9208eaba2a22a286bcf7.exe	28
PID 1048 wrote to memory of 1016	1048	13f834e84beb9208eaba2a22a286bcf7.exe	28
PID 1048 wrote to memory of 1016	1048	13f834e84beb9208eaba2a22a286bcf7.exe	28
PID 1016 wrote to memory of 2012	1016	WScript.exe	29
PID 1016 wrote to memory of 2012	1016	WScript.exe	29
PID 1016 wrote to memory of 2012	1016	WScript.exe	29
PID 1016 wrote to memory of 2012	1016	WScript.exe	29
PID 2012 wrote to memory of 1724	2012	cmd.exe	31
PID 2012 wrote to memory of 1724	2012	cmd.exe	31
PID 2012 wrote to memory of 1724	2012	cmd.exe	31
PID 2012 wrote to memory of 1724	2012	cmd.exe	31

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 Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

.exe

Path C:\chainreview\.exe
Size 1.1MB
SHA256 6e8a5bb847809a8171cc71ca1607cda9e464e73bf845bc06873ab477a6e366e6
MD5 bab21aac84fcbf6ff5639c699b8e5273
SHA1 baa4a9333d2ebfdd521780c65f9e11c516877a82
SHA512 3dcdbf6f2c65701e5fb36a13471fbeff74c85d4318fffe1b120c1ec9a5d6a9a5f1f565fae0a8d8a02be75e9c8d53878ad686b1895e3b908ad4ad03044dd0f529
SSDEEP 24576:y0FCa0/2H3wv0F0JUf7JLGRC2dH73eedcg8kbaS:y0FCa0/2HtGWyTFeOt8
MD5 SHA1 SHA512 SSDEEP

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.exe

Path C:\chainreview\.exe
Size 1.1MB
SHA256 6e8a5bb847809a8171cc71ca1607cda9e464e73bf845bc06873ab477a6e366e6
MD5 bab21aac84fcbf6ff5639c699b8e5273
SHA1 baa4a9333d2ebfdd521780c65f9e11c516877a82
SHA512 3dcdbf6f2c65701e5fb36a13471fbeff74c85d4318fffe1b120c1ec9a5d6a9a5f1f565fae0a8d8a02be75e9c8d53878ad686b1895e3b908ad4ad03044dd0f529
SSDEEP 24576:y0FCa0/2H3wv0F0JUf7JLGRC2dH73eedcg8kbaS:y0FCa0/2HtGWyTFeOt8
MD5 SHA1 SHA512 SSDEEP

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eQccdYwIKR90euD5Q0oan5EPG84.bat

Path C:\chainreview\eQccdYwIKR90euD5Q0oan5EPG84.bat
Size 21B
SHA256 b4c73df97e2777d089313540a743479457b2098566588ce2ba541bb48c4a3c4b
MD5 4b2d709c097bcecdacf548330a0f2704
SHA1 d2adee306617f4846b31727e1c03289d425fa8bb
SHA512 3043fc7b83d03788f5af852009571fe617e568514e3fcbd1f400e0f354fb0697257e540a708d049b7ab8e970588ec5d01d3e4a7fc444cd7eddaeddcc9e68c331
MD5 SHA1 SHA512

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egcCNJVTMxQySQYjogVX.vbe

Path C:\chainreview\egcCNJVTMxQySQYjogVX.vbe
Size 215B
SHA256 2ed582be651c6a9310418da72e95ae630639ed42782d0875d5877ccd15992a7e
MD5 fa51d6a3e958b8acbc6ef0c9d3b94315
SHA1 39235af0f705b2fb0d8ae2bf52b5a5eaf234e154
SHA512 746c3f22ea7b06ad00bafbadcfaa2967515ac78e46a207916191dab586ff1339505c1a5acf39493f588a27122f6fea4b5265b8317f41e499c1a97ee0edfb7722
MD5 SHA1 SHA512

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.exe

Path \chainreview\.exe
Size 1.1MB
SHA256 6e8a5bb847809a8171cc71ca1607cda9e464e73bf845bc06873ab477a6e366e6
MD5 bab21aac84fcbf6ff5639c699b8e5273
SHA1 baa4a9333d2ebfdd521780c65f9e11c516877a82
SHA512 3dcdbf6f2c65701e5fb36a13471fbeff74c85d4318fffe1b120c1ec9a5d6a9a5f1f565fae0a8d8a02be75e9c8d53878ad686b1895e3b908ad4ad03044dd0f529
SSDEEP 24576:y0FCa0/2H3wv0F0JUf7JLGRC2dH73eedcg8kbaS:y0FCa0/2HtGWyTFeOt8
MD5 SHA1 SHA512 SSDEEP

Submit Download

.exe

Path \chainreview\.exe
Size 1.1MB
SHA256 6e8a5bb847809a8171cc71ca1607cda9e464e73bf845bc06873ab477a6e366e6
MD5 bab21aac84fcbf6ff5639c699b8e5273
SHA1 baa4a9333d2ebfdd521780c65f9e11c516877a82
SHA512 3dcdbf6f2c65701e5fb36a13471fbeff74c85d4318fffe1b120c1ec9a5d6a9a5f1f565fae0a8d8a02be75e9c8d53878ad686b1895e3b908ad4ad03044dd0f529
SSDEEP 24576:y0FCa0/2H3wv0F0JUf7JLGRC2dH73eedcg8kbaS:y0FCa0/2HtGWyTFeOt8
MD5 SHA1 SHA512 SSDEEP

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

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

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

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

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

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