stealc | 4d401393db228d63524059ed6e1ef6870dd0dce88ce1248bf95a45f7573067a9

General

Target

4d401393db228d63524059ed6e1ef6870dd0dce88ce1248bf95a45f7573067a9.exe
Size

2.0MB
MD5

d2e972460664a7d3e4ab29a5d5a138fd
SHA1

029d248ea641bd5fe88ff92d780eb06c56f1c386
SHA256

4d401393db228d63524059ed6e1ef6870dd0dce88ce1248bf95a45f7573067a9
SHA512

f11ff2465d45cfbc4fd61f77149c5031c1966f77495c7c6248543d94d4ddde3e68617e9d2d5909c5783d94880d8206ef7228a758e8f050460f6fa72107b4b6c1
SSDEEP

49152:7QzHt472DiJtTF+TxMoxc1TU+j+dAzGwlrh:7QzHtwtIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/1128-1-0x0000000004180000-0x00000000042C9000-memory.dmp	family_vidar_v7
behavioral2/memory/2900-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2900-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2900-7-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2900-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2900-18-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2900-35-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2900-36-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

kat537F.tmp

pid process

2900 kat537F.tmp
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
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

pid	process
2900	kat537F.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

4d401393db228d63524059ed6e1ef6870dd0dce88ce1248bf95a45f7573067a9.exe

description	pid	process	target process
PID 1128 set thread context of 2900	1128	4d401393db228d63524059ed6e1ef6870dd0dce88ce1248bf95a45f7573067a9.exe	kat537F.tmp

Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.

Query Registry
T1012

System Information Discovery
T1082

Processes:

kat537F.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat537F.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat537F.tmp

pid process

2900 kat537F.tmp
2900 kat537F.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat537F.tmp

pid	process
2900	kat537F.tmp
2900	kat537F.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

4d401393db228d63524059ed6e1ef6870dd0dce88ce1248bf95a45f7573067a9.exe

description	pid	process	target process
PID 1128 wrote to memory of 2900	1128	4d401393db228d63524059ed6e1ef6870dd0dce88ce1248bf95a45f7573067a9.exe	kat537F.tmp
PID 1128 wrote to memory of 2900	1128	4d401393db228d63524059ed6e1ef6870dd0dce88ce1248bf95a45f7573067a9.exe	kat537F.tmp
PID 1128 wrote to memory of 2900	1128	4d401393db228d63524059ed6e1ef6870dd0dce88ce1248bf95a45f7573067a9.exe	kat537F.tmp
PID 1128 wrote to memory of 2900	1128	4d401393db228d63524059ed6e1ef6870dd0dce88ce1248bf95a45f7573067a9.exe	kat537F.tmp
PID 1128 wrote to memory of 2900	1128	4d401393db228d63524059ed6e1ef6870dd0dce88ce1248bf95a45f7573067a9.exe	kat537F.tmp
PID 1128 wrote to memory of 2900	1128	4d401393db228d63524059ed6e1ef6870dd0dce88ce1248bf95a45f7573067a9.exe	kat537F.tmp
PID 1128 wrote to memory of 2900	1128	4d401393db228d63524059ed6e1ef6870dd0dce88ce1248bf95a45f7573067a9.exe	kat537F.tmp
PID 1128 wrote to memory of 2900	1128	4d401393db228d63524059ed6e1ef6870dd0dce88ce1248bf95a45f7573067a9.exe	kat537F.tmp

C:\Users\Admin\AppData\Local\Temp\4d401393db228d63524059ed6e1ef6870dd0dce88ce1248bf95a45f7573067a9.exe
"C:\Users\Admin\AppData\Local\Temp\4d401393db228d63524059ed6e1ef6870dd0dce88ce1248bf95a45f7573067a9.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1128

C:\Users\Admin\AppData\Local\Temp\kat537F.tmp
C:\Users\Admin\AppData\Local\Temp\kat537F.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:2900

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat537F.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1128-0-0x00000000024A0000-0x00000000024A1000-memory.dmp

Filesize
4KB

Download
memory/1128-1-0x0000000004180000-0x00000000042C9000-memory.dmp

Filesize
1.3MB

Download
memory/1128-10-0x0000000000400000-0x0000000000601000-memory.dmp

Filesize
2.0MB

Download
memory/2900-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2900-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2900-7-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2900-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2900-18-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2900-21-0x000000001B8C0000-0x000000001BB1F000-memory.dmp

Filesize
2.4MB

Download
memory/2900-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2900-36-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads