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 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2324-25-0x0000000000BE0000-0x0000000001528000-memory.dmp	family_echelon
behavioral2/memory/2324-26-0x0000000000BE0000-0x0000000001528000-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 2 IoCs

Payload resembles modified variant of Echelon Stealer called DarkStealer.

stealer

Processes:

resource	yara_rule
behavioral2/memory/2324-25-0x0000000000BE0000-0x0000000001528000-memory.dmp	echelon_darkstealer
behavioral2/memory/2324-26-0x0000000000BE0000-0x0000000001528000-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

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 2 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral2/memory/2324-25-0x0000000000BE0000-0x0000000001528000-memory.dmp	themida
behavioral2/memory/2324-26-0x0000000000BE0000-0x0000000001528000-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-1-5-21-3073191680-435865314-2862784915-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	033362225cf09b9ae543da265c7d1885.exe
Key opened	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	033362225cf09b9ae543da265c7d1885.exe
Key opened	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Software\Microsoft\Office\16.0\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
2324	033362225cf09b9ae543da265c7d1885.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	Process	procid_target
1712	2324	WerFault.exe	90
4056	2324	WerFault.exe	90

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

033362225cf09b9ae543da265c7d1885.exe

pid	Process
2324	033362225cf09b9ae543da265c7d1885.exe
2324	033362225cf09b9ae543da265c7d1885.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

033362225cf09b9ae543da265c7d1885.exe

description	pid	Process
Token: SeDebugPrivilege	2324	033362225cf09b9ae543da265c7d1885.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

033362225cf09b9ae543da265c7d1885.exe

description	pid	Process	procid_target
PID 2324 wrote to memory of 1712	2324	033362225cf09b9ae543da265c7d1885.exe	107
PID 2324 wrote to memory of 1712	2324	033362225cf09b9ae543da265c7d1885.exe	107
PID 2324 wrote to memory of 1712	2324	033362225cf09b9ae543da265c7d1885.exe	107

outlook_office_path 1 IoCs

Processes:

033362225cf09b9ae543da265c7d1885.exe

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\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-1-5-21-3073191680-435865314-2862784915-1000\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
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:2324
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2324 -s 2212
  2⤵
  - Program crash
  PID:1712
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2324 -s 2212
  2⤵
  - Program crash
  PID:4056

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 2324 -ip 2324
1⤵
PID:1472

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/2324-0-0x0000000000BE0000-0x0000000001528000-memory.dmp

Filesize
9.3MB

Download
memory/2324-2-0x00000000758B0000-0x00000000759A0000-memory.dmp

Filesize
960KB

Download
memory/2324-3-0x00000000758B0000-0x00000000759A0000-memory.dmp

Filesize
960KB

Download
memory/2324-4-0x00000000758B0000-0x00000000759A0000-memory.dmp

Filesize
960KB

Download
memory/2324-5-0x00000000758B0000-0x00000000759A0000-memory.dmp

Filesize
960KB

Download
memory/2324-6-0x00000000758B0000-0x00000000759A0000-memory.dmp

Filesize
960KB

Download
memory/2324-7-0x00000000758B0000-0x00000000759A0000-memory.dmp

Filesize
960KB

Download
memory/2324-8-0x00000000758B0000-0x00000000759A0000-memory.dmp

Filesize
960KB

Download
memory/2324-9-0x0000000000BE0000-0x0000000001528000-memory.dmp

Filesize
9.3MB

Download
memory/2324-10-0x0000000077404000-0x0000000077406000-memory.dmp

Filesize
8KB

Download
memory/2324-15-0x00000000758B0000-0x00000000759A0000-memory.dmp

Filesize
960KB

Download
memory/2324-16-0x00000000758B0000-0x00000000759A0000-memory.dmp

Filesize
960KB

Download
memory/2324-17-0x00000000758B0000-0x00000000759A0000-memory.dmp

Filesize
960KB

Download
memory/2324-18-0x00000000758B0000-0x00000000759A0000-memory.dmp

Filesize
960KB

Download
memory/2324-19-0x00000000758B0000-0x00000000759A0000-memory.dmp

Filesize
960KB

Download
memory/2324-20-0x00000000758B0000-0x00000000759A0000-memory.dmp

Filesize
960KB

Download
memory/2324-21-0x00000000758B0000-0x00000000759A0000-memory.dmp

Filesize
960KB

Download
memory/2324-22-0x00000000758B0000-0x00000000759A0000-memory.dmp

Filesize
960KB

Download
memory/2324-25-0x0000000000BE0000-0x0000000001528000-memory.dmp

Filesize
9.3MB

Download
memory/2324-26-0x0000000000BE0000-0x0000000001528000-memory.dmp

Filesize
9.3MB

Download
memory/2324-29-0x0000000006120000-0x0000000006186000-memory.dmp

Filesize
408KB

Download
memory/2324-34-0x0000000006A50000-0x0000000006AEC000-memory.dmp

Filesize
624KB

Download
memory/2324-40-0x0000000006B90000-0x0000000006C22000-memory.dmp

Filesize
584KB

Download
memory/2324-42-0x00000000076C0000-0x0000000007C64000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads