redline | c6897ee5e6e0c63e0cf1866460859894664359d397f9d453546adf12c7794818

Analysis

max time kernel
18s
max time network
120s
platform
windows10_x64
resource
win10v20210410
submitted
11-08-2021 12:52

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General

Target

Crystal.exe
Size

3.0MB
MD5

d59c7cc6f109cb59fa55309f4f829692
SHA1

18c2361058540fdf9684ba07cef04085d90dbaa2
SHA256

a35bb31351cf385fe52b27c02642f2f99aed0d8fd472b4df12bf508faf3426d3
SHA512

532d135a1009a4a4985cbf15ad1cd1fe35a2ea5bb1a8ce15da5c2f5f6d7cb9b07491715b24539ad36702c664fb71e98a4f3aca1753691de5a02d73caa87bbc00

Score

10^/10

redline discovery evasion infostealer spyware stealer themida trojan

Malware Config

Signatures

RedLine
RedLine Stealer is a malware family written in C#, first appearing in early 2020.
infostealer redline
Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

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:

Crystal.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Crystal.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Crystal.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

Themida packer 1 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral4/memory/3904-116-0x0000000000150000-0x0000000000151000-memory.dmp	themida

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
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:

Crystal.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA Crystal.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

Crystal.exe

pid process

3904 Crystal.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

Crystal.exe

pid process

3904 Crystal.exe
3904 Crystal.exe
3904 Crystal.exe
3904 Crystal.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Crystal.exe

description pid process

Token: SeDebugPrivilege 3904 Crystal.exe

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

pid	process
3904	Crystal.exe

pid	process
3904	Crystal.exe
3904	Crystal.exe
3904	Crystal.exe
3904	Crystal.exe

description	pid	process
Token: SeDebugPrivilege	3904	Crystal.exe

C:\Users\Admin\AppData\Local\Temp\Crystal.exe
"C:\Users\Admin\AppData\Local\Temp\Crystal.exe"
1⤵
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3904

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3904-115-0x00000000773E0000-0x000000007756E000-memory.dmp

Filesize
1.6MB

Download
memory/3904-116-0x0000000000150000-0x0000000000151000-memory.dmp

Filesize
4KB

Download
memory/3904-118-0x00000000058A0000-0x00000000058A1000-memory.dmp

Filesize
4KB

Download
memory/3904-119-0x0000000005330000-0x0000000005331000-memory.dmp

Filesize
4KB

Download
memory/3904-120-0x0000000005390000-0x0000000005391000-memory.dmp

Filesize
4KB

Download
memory/3904-121-0x00000000053D0000-0x00000000053D1000-memory.dmp

Filesize
4KB

Download
memory/3904-122-0x0000000005290000-0x0000000005896000-memory.dmp

Filesize
6.0MB

Download
memory/3904-123-0x0000000005640000-0x0000000005641000-memory.dmp

Filesize
4KB

Download
memory/3904-124-0x00000000067B0000-0x00000000067B1000-memory.dmp

Filesize
4KB

Download
memory/3904-125-0x0000000006EB0000-0x0000000006EB1000-memory.dmp

Filesize
4KB

Download
memory/3904-126-0x00000000078E0000-0x00000000078E1000-memory.dmp

Filesize
4KB

Download
memory/3904-127-0x0000000006A80000-0x0000000006A81000-memory.dmp

Filesize
4KB

Download
memory/3904-128-0x0000000006CE0000-0x0000000006CE1000-memory.dmp

Filesize
4KB

Download
memory/3904-129-0x0000000006D80000-0x0000000006D81000-memory.dmp

Filesize
4KB

Download
memory/3904-130-0x0000000006E70000-0x0000000006E71000-memory.dmp

Filesize
4KB

Download