stealc | 61c8ae9a56d98e1b23591deba30b0c3df73657b1538da56255337e81338380e6

General

Target

61c8ae9a56d98e1b23591deba30b0c3df73657b1538da56255337e81338380e6.exe
Size

2.1MB
MD5

6e4c4c16eb0a8ace6eff45bbf4af78b0
SHA1

42f77ba20d965dd92b11b6de3daee169145ecfbd
SHA256

61c8ae9a56d98e1b23591deba30b0c3df73657b1538da56255337e81338380e6
SHA512

db8609ce4490594e576cb1c9991864ab259fa84f1879105bc10048b752605081bb42b4782cd6fcffcfc881ca75915e45e7eaba602cb2591b977f9500fbdffe53
SSDEEP

49152:N6uDuaS9refe4JtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb9L4tIuoITsdZ

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/4888-1-0x00000000041F0000-0x0000000004339000-memory.dmp	family_vidar_v7
behavioral1/memory/2148-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2148-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2148-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2148-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2148-18-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2148-35-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2148-36-0x0000000000400000-0x0000000000646000-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

pid	Process
2148	kat5B8.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 4888 set thread context of 2148	4888	61c8ae9a56d98e1b23591deba30b0c3df73657b1538da56255337e81338380e6.exe	91

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	kat5B8.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2148	kat5B8.tmp
2148	kat5B8.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4888 wrote to memory of 2148	4888	61c8ae9a56d98e1b23591deba30b0c3df73657b1538da56255337e81338380e6.exe	91
PID 4888 wrote to memory of 2148	4888	61c8ae9a56d98e1b23591deba30b0c3df73657b1538da56255337e81338380e6.exe	91
PID 4888 wrote to memory of 2148	4888	61c8ae9a56d98e1b23591deba30b0c3df73657b1538da56255337e81338380e6.exe	91
PID 4888 wrote to memory of 2148	4888	61c8ae9a56d98e1b23591deba30b0c3df73657b1538da56255337e81338380e6.exe	91
PID 4888 wrote to memory of 2148	4888	61c8ae9a56d98e1b23591deba30b0c3df73657b1538da56255337e81338380e6.exe	91
PID 4888 wrote to memory of 2148	4888	61c8ae9a56d98e1b23591deba30b0c3df73657b1538da56255337e81338380e6.exe	91
PID 4888 wrote to memory of 2148	4888	61c8ae9a56d98e1b23591deba30b0c3df73657b1538da56255337e81338380e6.exe	91
PID 4888 wrote to memory of 2148	4888	61c8ae9a56d98e1b23591deba30b0c3df73657b1538da56255337e81338380e6.exe	91

C:\Users\Admin\AppData\Local\Temp\61c8ae9a56d98e1b23591deba30b0c3df73657b1538da56255337e81338380e6.exe
"C:\Users\Admin\AppData\Local\Temp\61c8ae9a56d98e1b23591deba30b0c3df73657b1538da56255337e81338380e6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4888
- C:\Users\Admin\AppData\Local\Temp\kat5B8.tmp
  C:\Users\Admin\AppData\Local\Temp\kat5B8.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2148

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4332 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:8
1⤵
PID:3740

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\kat5B8.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2148-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2148-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2148-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2148-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2148-18-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2148-20-0x000000001B7C0000-0x000000001BA1F000-memory.dmp

Filesize
2.4MB

Download
memory/2148-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2148-36-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4888-0-0x0000000000810000-0x0000000000811000-memory.dmp

Filesize
4KB

Download
memory/4888-1-0x00000000041F0000-0x0000000004339000-memory.dmp

Filesize
1.3MB

Download
memory/4888-8-0x0000000000400000-0x000000000061C000-memory.dmp

Filesize
2.1MB

Download

Analysis

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