stealc | 77aefa74fd5a32b496c9f5d752c40bcc2090ad714dc12befb3394b0a93d76b67

General

Target

77aefa74fd5a32b496c9f5d752c40bcc2090ad714dc12befb3394b0a93d76b67.exe
Size

2.0MB
MD5

b09419bc3565a362febd7768cf734d3d
SHA1

0b1fa201ff324ae259eb230522527b75f96d7e93
SHA256

77aefa74fd5a32b496c9f5d752c40bcc2090ad714dc12befb3394b0a93d76b67
SHA512

ce4e55709d229ed54f6d2ed3c06ba53e44daa826e880926117983db6ff568316f2053b5295bd4efe013a0132a7cb93ac57005fa7abc3b304f5c1c5a26c6156f6
SSDEEP

49152:OePpQEpJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEptIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

Detect Vidar Stealer 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/3144-1-0x0000000003FF0000-0x0000000004139000-memory.dmp	family_vidar_v7
behavioral1/memory/4408-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4408-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4408-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4408-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4408-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4408-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4408-33-0x0000000000400000-0x0000000000646000-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:

katEBF6.tmp

pid process

4408 katEBF6.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
4408	katEBF6.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

77aefa74fd5a32b496c9f5d752c40bcc2090ad714dc12befb3394b0a93d76b67.exe

description	pid	process	target process
PID 3144 set thread context of 4408	3144	77aefa74fd5a32b496c9f5d752c40bcc2090ad714dc12befb3394b0a93d76b67.exe	katEBF6.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:

katEBF6.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString katEBF6.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

katEBF6.tmp

pid process

4408 katEBF6.tmp
4408 katEBF6.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	katEBF6.tmp

pid	process
4408	katEBF6.tmp
4408	katEBF6.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

77aefa74fd5a32b496c9f5d752c40bcc2090ad714dc12befb3394b0a93d76b67.exe

description	pid	process	target process
PID 3144 wrote to memory of 4408	3144	77aefa74fd5a32b496c9f5d752c40bcc2090ad714dc12befb3394b0a93d76b67.exe	katEBF6.tmp
PID 3144 wrote to memory of 4408	3144	77aefa74fd5a32b496c9f5d752c40bcc2090ad714dc12befb3394b0a93d76b67.exe	katEBF6.tmp
PID 3144 wrote to memory of 4408	3144	77aefa74fd5a32b496c9f5d752c40bcc2090ad714dc12befb3394b0a93d76b67.exe	katEBF6.tmp
PID 3144 wrote to memory of 4408	3144	77aefa74fd5a32b496c9f5d752c40bcc2090ad714dc12befb3394b0a93d76b67.exe	katEBF6.tmp
PID 3144 wrote to memory of 4408	3144	77aefa74fd5a32b496c9f5d752c40bcc2090ad714dc12befb3394b0a93d76b67.exe	katEBF6.tmp
PID 3144 wrote to memory of 4408	3144	77aefa74fd5a32b496c9f5d752c40bcc2090ad714dc12befb3394b0a93d76b67.exe	katEBF6.tmp
PID 3144 wrote to memory of 4408	3144	77aefa74fd5a32b496c9f5d752c40bcc2090ad714dc12befb3394b0a93d76b67.exe	katEBF6.tmp
PID 3144 wrote to memory of 4408	3144	77aefa74fd5a32b496c9f5d752c40bcc2090ad714dc12befb3394b0a93d76b67.exe	katEBF6.tmp

C:\Users\Admin\AppData\Local\Temp\77aefa74fd5a32b496c9f5d752c40bcc2090ad714dc12befb3394b0a93d76b67.exe
"C:\Users\Admin\AppData\Local\Temp\77aefa74fd5a32b496c9f5d752c40bcc2090ad714dc12befb3394b0a93d76b67.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3144

C:\Users\Admin\AppData\Local\Temp\katEBF6.tmp
C:\Users\Admin\AppData\Local\Temp\katEBF6.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4408

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 --field-trial-handle=4196,i,16488180140590516186,11762960689811837350,262144 --variations-seed-version --mojo-platform-channel-handle=4156 /prefetch:8
1⤵
PID:4772

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\katEBF6.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3144-0-0x0000000002380000-0x0000000002381000-memory.dmp

Filesize
4KB

Download
memory/3144-1-0x0000000003FF0000-0x0000000004139000-memory.dmp

Filesize
1.3MB

Download
memory/3144-10-0x0000000000400000-0x0000000000612000-memory.dmp

Filesize
2.1MB

Download
memory/4408-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4408-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4408-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4408-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4408-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4408-17-0x000000001B710000-0x000000001B96F000-memory.dmp

Filesize
2.4MB

Download
memory/4408-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4408-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads