stealc | 8883a108b33d719d8646dc0cbcdabce184be1bfce307c3eeedf96f7c5847cdfe

General

Target

8883a108b33d719d8646dc0cbcdabce184be1bfce307c3eeedf96f7c5847cdfe.exe
Size

1.8MB
MD5

25f8fcd2bb019b162b9096257408e639
SHA1

70df732c3f965e5a1c754ad4fc19d3165852e030
SHA256

8883a108b33d719d8646dc0cbcdabce184be1bfce307c3eeedf96f7c5847cdfe
SHA512

1d5ef4f3b63cbc1b5ed85e800904c5566fc0da0e24abbf4364259d5b952f9da84df76662e1c5502e5067d56f9b18d56efb085dfa25a21e787c965dbd1eb243f4
SSDEEP

24576:FBfuZfeq6sFO6hTdtTF+TxMoxQH1Tj4wtjYZH1DmoYYzi3WH45yv+OueSJhm9e:F7qFXJtTF+TxMoxc1TU+j+dAzGwlrh

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 8 IoCs

stealer

resource	yara_rule
behavioral1/memory/3520-1-0x0000000003FB0000-0x00000000040F9000-memory.dmp	family_vidar_v7
behavioral1/memory/1740-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1740-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1740-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1740-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1740-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1740-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1740-33-0x0000000000400000-0x0000000000646000-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

pid	Process
1740	kat4A38.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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3520 set thread context of 1740	3520	8883a108b33d719d8646dc0cbcdabce184be1bfce307c3eeedf96f7c5847cdfe.exe	83

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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4A38.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1740	kat4A38.tmp
1740	kat4A38.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3520 wrote to memory of 1740	3520	8883a108b33d719d8646dc0cbcdabce184be1bfce307c3eeedf96f7c5847cdfe.exe	83
PID 3520 wrote to memory of 1740	3520	8883a108b33d719d8646dc0cbcdabce184be1bfce307c3eeedf96f7c5847cdfe.exe	83
PID 3520 wrote to memory of 1740	3520	8883a108b33d719d8646dc0cbcdabce184be1bfce307c3eeedf96f7c5847cdfe.exe	83
PID 3520 wrote to memory of 1740	3520	8883a108b33d719d8646dc0cbcdabce184be1bfce307c3eeedf96f7c5847cdfe.exe	83
PID 3520 wrote to memory of 1740	3520	8883a108b33d719d8646dc0cbcdabce184be1bfce307c3eeedf96f7c5847cdfe.exe	83
PID 3520 wrote to memory of 1740	3520	8883a108b33d719d8646dc0cbcdabce184be1bfce307c3eeedf96f7c5847cdfe.exe	83
PID 3520 wrote to memory of 1740	3520	8883a108b33d719d8646dc0cbcdabce184be1bfce307c3eeedf96f7c5847cdfe.exe	83
PID 3520 wrote to memory of 1740	3520	8883a108b33d719d8646dc0cbcdabce184be1bfce307c3eeedf96f7c5847cdfe.exe	83

C:\Users\Admin\AppData\Local\Temp\8883a108b33d719d8646dc0cbcdabce184be1bfce307c3eeedf96f7c5847cdfe.exe
"C:\Users\Admin\AppData\Local\Temp\8883a108b33d719d8646dc0cbcdabce184be1bfce307c3eeedf96f7c5847cdfe.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3520
- C:\Users\Admin\AppData\Local\Temp\kat4A38.tmp
  C:\Users\Admin\AppData\Local\Temp\kat4A38.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:1740

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat4A38.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1740-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1740-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1740-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1740-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1740-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1740-18-0x000000001B7D0000-0x000000001BA2F000-memory.dmp

Filesize
2.4MB

Download
memory/1740-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1740-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3520-0-0x0000000000780000-0x0000000000781000-memory.dmp

Filesize
4KB

Download
memory/3520-1-0x0000000003FB0000-0x00000000040F9000-memory.dmp

Filesize
1.3MB

Download
memory/3520-10-0x0000000000400000-0x00000000005D1000-memory.dmp

Filesize
1.8MB

Download

Analysis

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