darkstealer | 9388288b3a18d968cd47446d545eb63d272bac65c0ad1d490beb389d94d2e9e0

General

Target

033362225cf09b9ae543da265c7d1885.exe
Size

3.4MB
MD5

033362225cf09b9ae543da265c7d1885
SHA1

4d2b95b71dd92277718b54a341ba62b24c95c888
SHA256

9388288b3a18d968cd47446d545eb63d272bac65c0ad1d490beb389d94d2e9e0
SHA512

41b858735f309c938db681cd1a974dd47c7ff0fe3286f713ce50d4c7e070e64af26dd9a2dfe59f7a559d4255557d0926406c66996edb819ab466f4527349543e
SSDEEP

98304:UVrHzZ9ACjcIOrJkqn7lAmpe+oO8XuhAAe9tSys3mm:UVDzZCkcI66qn7lAmlobXuO9tSvf

Score

10^/10

darkstealer echelon backdoor collection discovery evasion spyware stealer themida trojan

Malware Config

Signatures

Darkstealer
Darkstealer is a file grabber, data stealer, and RAT.
trojan backdoor darkstealer

Detects Echelon Stealer payload 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4636-12-0x0000000000DE0000-0x0000000001728000-memory.dmp	family_echelon
behavioral2/memory/4636-13-0x0000000000DE0000-0x0000000001728000-memory.dmp	family_echelon
behavioral2/memory/4636-37-0x0000000000DE0000-0x0000000001728000-memory.dmp	family_echelon

Echelon
Echelon is a .NET stealer that targets passwords from browsers, email and cryptocurrency clients.
stealer spyware echelon

Echelon - DarkStealer Fork 3 IoCs

Payload resembles modified variant of Echelon Stealer called DarkStealer.

stealer

Processes:

resource	yara_rule
behavioral2/memory/4636-12-0x0000000000DE0000-0x0000000001728000-memory.dmp	echelon_darkstealer
behavioral2/memory/4636-13-0x0000000000DE0000-0x0000000001728000-memory.dmp	echelon_darkstealer
behavioral2/memory/4636-37-0x0000000000DE0000-0x0000000001728000-memory.dmp	echelon_darkstealer

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

033362225cf09b9ae543da265c7d1885.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ 033362225cf09b9ae543da265c7d1885.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	033362225cf09b9ae543da265c7d1885.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

033362225cf09b9ae543da265c7d1885.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	033362225cf09b9ae543da265c7d1885.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	033362225cf09b9ae543da265c7d1885.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
T1552.001

Themida packer 3 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral2/memory/4636-12-0x0000000000DE0000-0x0000000001728000-memory.dmp	themida
behavioral2/memory/4636-13-0x0000000000DE0000-0x0000000001728000-memory.dmp	themida
behavioral2/memory/4636-37-0x0000000000DE0000-0x0000000001728000-memory.dmp	themida

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

033362225cf09b9ae543da265c7d1885.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	033362225cf09b9ae543da265c7d1885.exe
Key opened	\REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	033362225cf09b9ae543da265c7d1885.exe
Key opened	\REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	033362225cf09b9ae543da265c7d1885.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

033362225cf09b9ae543da265c7d1885.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	033362225cf09b9ae543da265c7d1885.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

033362225cf09b9ae543da265c7d1885.exe

pid process

4636 033362225cf09b9ae543da265c7d1885.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

5020 4636 WerFault.exe 033362225cf09b9ae543da265c7d1885.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

033362225cf09b9ae543da265c7d1885.exe

pid process

4636 033362225cf09b9ae543da265c7d1885.exe
4636 033362225cf09b9ae543da265c7d1885.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

033362225cf09b9ae543da265c7d1885.exe

description pid process

Token: SeDebugPrivilege 4636 033362225cf09b9ae543da265c7d1885.exe

pid	process
4636	033362225cf09b9ae543da265c7d1885.exe

pid	pid_target	process	target process
5020	4636	WerFault.exe	033362225cf09b9ae543da265c7d1885.exe

pid	process
4636	033362225cf09b9ae543da265c7d1885.exe
4636	033362225cf09b9ae543da265c7d1885.exe

description	pid	process
Token: SeDebugPrivilege	4636	033362225cf09b9ae543da265c7d1885.exe

outlook_office_path 1 IoCs

Processes:

033362225cf09b9ae543da265c7d1885.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	033362225cf09b9ae543da265c7d1885.exe

outlook_win_path 1 IoCs

Processes:

033362225cf09b9ae543da265c7d1885.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	033362225cf09b9ae543da265c7d1885.exe

C:\Users\Admin\AppData\Local\Temp\033362225cf09b9ae543da265c7d1885.exe
"C:\Users\Admin\AppData\Local\Temp\033362225cf09b9ae543da265c7d1885.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Accesses Microsoft Outlook profiles
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:4636

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4636 -s 2260
2⤵
- Program crash
PID:5020

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 4636 -ip 4636
1⤵
PID:2128

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

2

T1082

Virtualization/Sandbox Evasion

1

T1497

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4636-0-0x0000000000DE0000-0x0000000001728000-memory.dmp

Filesize
9.3MB

Download
memory/4636-1-0x0000000075390000-0x0000000075480000-memory.dmp

Filesize
960KB

Download
memory/4636-3-0x0000000075390000-0x0000000075480000-memory.dmp

Filesize
960KB

Download
memory/4636-2-0x0000000075390000-0x0000000075480000-memory.dmp

Filesize
960KB

Download
memory/4636-6-0x0000000075390000-0x0000000075480000-memory.dmp

Filesize
960KB

Download
memory/4636-8-0x0000000075390000-0x0000000075480000-memory.dmp

Filesize
960KB

Download
memory/4636-7-0x0000000075390000-0x0000000075480000-memory.dmp

Filesize
960KB

Download
memory/4636-5-0x0000000075390000-0x0000000075480000-memory.dmp

Filesize
960KB

Download
memory/4636-4-0x0000000075390000-0x0000000075480000-memory.dmp

Filesize
960KB

Download
memory/4636-9-0x00000000773A4000-0x00000000773A6000-memory.dmp

Filesize
8KB

Download
memory/4636-12-0x0000000000DE0000-0x0000000001728000-memory.dmp

Filesize
9.3MB

Download
memory/4636-13-0x0000000000DE0000-0x0000000001728000-memory.dmp

Filesize
9.3MB

Download
memory/4636-14-0x0000000005C50000-0x0000000005CB6000-memory.dmp

Filesize
408KB

Download
memory/4636-16-0x0000000000DE0000-0x0000000001728000-memory.dmp

Filesize
9.3MB

Download
memory/4636-18-0x0000000075390000-0x0000000075480000-memory.dmp

Filesize
960KB

Download
memory/4636-20-0x0000000075390000-0x0000000075480000-memory.dmp

Filesize
960KB

Download
memory/4636-21-0x0000000075390000-0x0000000075480000-memory.dmp

Filesize
960KB

Download
memory/4636-19-0x0000000075390000-0x0000000075480000-memory.dmp

Filesize
960KB

Download
memory/4636-24-0x0000000075390000-0x0000000075480000-memory.dmp

Filesize
960KB

Download
memory/4636-23-0x0000000075390000-0x0000000075480000-memory.dmp

Filesize
960KB

Download
memory/4636-26-0x0000000006E60000-0x0000000006EFC000-memory.dmp

Filesize
624KB

Download
memory/4636-27-0x00000000074B0000-0x0000000007A54000-memory.dmp

Filesize
5.6MB

Download
memory/4636-25-0x0000000006DC0000-0x0000000006E52000-memory.dmp

Filesize
584KB

Download
memory/4636-36-0x0000000075390000-0x0000000075480000-memory.dmp

Filesize
960KB

Download
memory/4636-37-0x0000000000DE0000-0x0000000001728000-memory.dmp

Filesize
9.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads