stealc | 8cb0934a7afa08a4f14e08903fd794c3a53b8e9c56732b513b590227d58c9338

General

Target

8cb0934a7afa08a4f14e08903fd794c3a53b8e9c56732b513b590227d58c9338.exe
Size

1.8MB
MD5

e0d145ddcd92b156de696a2102a37648
SHA1

637f0689f43e0567929d4eab810df79601b18c4c
SHA256

8cb0934a7afa08a4f14e08903fd794c3a53b8e9c56732b513b590227d58c9338
SHA512

9f6fd8cb346bccbaee340ce5114f8fb3bd00c30a56f8acffcc6c024fd23c49984066991402a7c89dbafbc19f92c0e017f12f9eb8bdda64361db128a9a4ee59f4
SSDEEP

24576:FBfuZfeq6sxO6hTdtTF+TxMoxQH1Tj4wtjYZH1DmoYYzi3WH45yv+OueSJhm9e:F7qFbJtTF+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

Processes:

resource	yara_rule
behavioral1/memory/4268-1-0x0000000003FC0000-0x0000000004109000-memory.dmp	family_vidar_v7
behavioral1/memory/4660-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4660-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4660-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4660-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4660-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4660-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4660-33-0x0000000000400000-0x0000000000646000-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

Processes:

kat519A.tmp

pid process

4660 kat519A.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
4660	kat519A.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

8cb0934a7afa08a4f14e08903fd794c3a53b8e9c56732b513b590227d58c9338.exe

description	pid	process	target process
PID 4268 set thread context of 4660	4268	8cb0934a7afa08a4f14e08903fd794c3a53b8e9c56732b513b590227d58c9338.exe	kat519A.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:

kat519A.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat519A.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat519A.tmp

pid process

4660 kat519A.tmp
4660 kat519A.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat519A.tmp

pid	process
4660	kat519A.tmp
4660	kat519A.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

8cb0934a7afa08a4f14e08903fd794c3a53b8e9c56732b513b590227d58c9338.exe

description	pid	process	target process
PID 4268 wrote to memory of 4660	4268	8cb0934a7afa08a4f14e08903fd794c3a53b8e9c56732b513b590227d58c9338.exe	kat519A.tmp
PID 4268 wrote to memory of 4660	4268	8cb0934a7afa08a4f14e08903fd794c3a53b8e9c56732b513b590227d58c9338.exe	kat519A.tmp
PID 4268 wrote to memory of 4660	4268	8cb0934a7afa08a4f14e08903fd794c3a53b8e9c56732b513b590227d58c9338.exe	kat519A.tmp
PID 4268 wrote to memory of 4660	4268	8cb0934a7afa08a4f14e08903fd794c3a53b8e9c56732b513b590227d58c9338.exe	kat519A.tmp
PID 4268 wrote to memory of 4660	4268	8cb0934a7afa08a4f14e08903fd794c3a53b8e9c56732b513b590227d58c9338.exe	kat519A.tmp
PID 4268 wrote to memory of 4660	4268	8cb0934a7afa08a4f14e08903fd794c3a53b8e9c56732b513b590227d58c9338.exe	kat519A.tmp
PID 4268 wrote to memory of 4660	4268	8cb0934a7afa08a4f14e08903fd794c3a53b8e9c56732b513b590227d58c9338.exe	kat519A.tmp
PID 4268 wrote to memory of 4660	4268	8cb0934a7afa08a4f14e08903fd794c3a53b8e9c56732b513b590227d58c9338.exe	kat519A.tmp

C:\Users\Admin\AppData\Local\Temp\8cb0934a7afa08a4f14e08903fd794c3a53b8e9c56732b513b590227d58c9338.exe
"C:\Users\Admin\AppData\Local\Temp\8cb0934a7afa08a4f14e08903fd794c3a53b8e9c56732b513b590227d58c9338.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4268
- C:\Users\Admin\AppData\Local\Temp\kat519A.tmp
  C:\Users\Admin\AppData\Local\Temp\kat519A.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4660

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat519A.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/4268-0-0x0000000002330000-0x0000000002331000-memory.dmp

Filesize
4KB

Download
memory/4268-1-0x0000000003FC0000-0x0000000004109000-memory.dmp

Filesize
1.3MB

Download
memory/4268-9-0x0000000000400000-0x00000000005D1000-memory.dmp

Filesize
1.8MB

Download
memory/4660-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4660-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4660-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4660-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4660-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4660-18-0x0000000019320000-0x000000001957F000-memory.dmp

Filesize
2.4MB

Download
memory/4660-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4660-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads