stealc | cdc551888c5e383bf9e4f62f2a075b3f3d07004f82f7071356b72465db22b8a7

General

Target

cdc551888c5e383bf9e4f62f2a075b3f3d07004f82f7071356b72465db22b8a7.exe
Size

1.8MB
MD5

b771a84de695bb44356e7f8183d7756f
SHA1

3e1b56590fc989c0b86ab5bd0395f872d70ede9c
SHA256

cdc551888c5e383bf9e4f62f2a075b3f3d07004f82f7071356b72465db22b8a7
SHA512

56a2522eaeb4fa5a08e9dbdf83dc751303fafc4f52f36d8f58824b141fa94c7276c0054886c8093db9654658b6dc11810df5fb8c6a0be02d3507c0249d232eb7
SSDEEP

24576:FBfuZfeq6slO6hTdtTF+TxMoxQH1Tj4wtjYZH1DmoYYzi3WH45yv+OueSJhm9e:F7qF3JtTF+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
behavioral2/memory/1788-2-0x0000000004000000-0x0000000004149000-memory.dmp	family_vidar_v7
behavioral2/memory/3060-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3060-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3060-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3060-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3060-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3060-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3060-38-0x0000000000400000-0x0000000000646000-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
3060	kat5340.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 1788 set thread context of 3060	1788	cdc551888c5e383bf9e4f62f2a075b3f3d07004f82f7071356b72465db22b8a7.exe	78

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	kat5340.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3060	kat5340.tmp
3060	kat5340.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1788 wrote to memory of 3060	1788	cdc551888c5e383bf9e4f62f2a075b3f3d07004f82f7071356b72465db22b8a7.exe	78
PID 1788 wrote to memory of 3060	1788	cdc551888c5e383bf9e4f62f2a075b3f3d07004f82f7071356b72465db22b8a7.exe	78
PID 1788 wrote to memory of 3060	1788	cdc551888c5e383bf9e4f62f2a075b3f3d07004f82f7071356b72465db22b8a7.exe	78
PID 1788 wrote to memory of 3060	1788	cdc551888c5e383bf9e4f62f2a075b3f3d07004f82f7071356b72465db22b8a7.exe	78
PID 1788 wrote to memory of 3060	1788	cdc551888c5e383bf9e4f62f2a075b3f3d07004f82f7071356b72465db22b8a7.exe	78
PID 1788 wrote to memory of 3060	1788	cdc551888c5e383bf9e4f62f2a075b3f3d07004f82f7071356b72465db22b8a7.exe	78
PID 1788 wrote to memory of 3060	1788	cdc551888c5e383bf9e4f62f2a075b3f3d07004f82f7071356b72465db22b8a7.exe	78
PID 1788 wrote to memory of 3060	1788	cdc551888c5e383bf9e4f62f2a075b3f3d07004f82f7071356b72465db22b8a7.exe	78

C:\Users\Admin\AppData\Local\Temp\cdc551888c5e383bf9e4f62f2a075b3f3d07004f82f7071356b72465db22b8a7.exe
"C:\Users\Admin\AppData\Local\Temp\cdc551888c5e383bf9e4f62f2a075b3f3d07004f82f7071356b72465db22b8a7.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1788
- C:\Users\Admin\AppData\Local\Temp\kat5340.tmp
  C:\Users\Admin\AppData\Local\Temp\kat5340.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3060

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\kat5340.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1788-0-0x0000000002330000-0x0000000002331000-memory.dmp

Filesize
4KB

Download
memory/1788-2-0x0000000004000000-0x0000000004149000-memory.dmp

Filesize
1.3MB

Download
memory/1788-10-0x0000000000400000-0x00000000005D1000-memory.dmp

Filesize
1.8MB

Download
memory/3060-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3060-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3060-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3060-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3060-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3060-22-0x0000000026050000-0x00000000262AF000-memory.dmp

Filesize
2.4MB

Download
memory/3060-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3060-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

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