stealc | a1984fbfacc51f3a9d02445ac3c927f62809779448545ea9e07936c18f36aaf6

General

Target

a1984fbfacc51f3a9d02445ac3c927f62809779448545ea9e07936c18f36aaf6.exe
Size

2.1MB
MD5

d63c7ff0088348f29d4423f79497e61c
SHA1

ad18601c2b032b87bac73ec25cdfd51402ef73e6
SHA256

a1984fbfacc51f3a9d02445ac3c927f62809779448545ea9e07936c18f36aaf6
SHA512

16952b177d0cc721b66c1ffe087ab1c3b3f8fa016fd3bbd051441ebb1ab85247fdd3ef86f882579d5a311c738b71008091927f5abf4b09b7cffe14b8ef58f7b4
SSDEEP

49152:N6uDuaS9refmAJtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb9jAtIuoITsdZ

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/2844-2-0x0000000004050000-0x0000000004199000-memory.dmp	family_vidar_v7
behavioral1/memory/3388-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3388-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3388-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3388-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3388-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3388-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3388-33-0x0000000000400000-0x0000000000646000-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:

kat591C.tmp

pid process

3388 kat591C.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
3388	kat591C.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

a1984fbfacc51f3a9d02445ac3c927f62809779448545ea9e07936c18f36aaf6.exe

description	pid	process	target process
PID 2844 set thread context of 3388	2844	a1984fbfacc51f3a9d02445ac3c927f62809779448545ea9e07936c18f36aaf6.exe	kat591C.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:

kat591C.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat591C.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat591C.tmp

pid process

3388 kat591C.tmp
3388 kat591C.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat591C.tmp

pid	process
3388	kat591C.tmp
3388	kat591C.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

a1984fbfacc51f3a9d02445ac3c927f62809779448545ea9e07936c18f36aaf6.exe

description	pid	process	target process
PID 2844 wrote to memory of 3388	2844	a1984fbfacc51f3a9d02445ac3c927f62809779448545ea9e07936c18f36aaf6.exe	kat591C.tmp
PID 2844 wrote to memory of 3388	2844	a1984fbfacc51f3a9d02445ac3c927f62809779448545ea9e07936c18f36aaf6.exe	kat591C.tmp
PID 2844 wrote to memory of 3388	2844	a1984fbfacc51f3a9d02445ac3c927f62809779448545ea9e07936c18f36aaf6.exe	kat591C.tmp
PID 2844 wrote to memory of 3388	2844	a1984fbfacc51f3a9d02445ac3c927f62809779448545ea9e07936c18f36aaf6.exe	kat591C.tmp
PID 2844 wrote to memory of 3388	2844	a1984fbfacc51f3a9d02445ac3c927f62809779448545ea9e07936c18f36aaf6.exe	kat591C.tmp
PID 2844 wrote to memory of 3388	2844	a1984fbfacc51f3a9d02445ac3c927f62809779448545ea9e07936c18f36aaf6.exe	kat591C.tmp
PID 2844 wrote to memory of 3388	2844	a1984fbfacc51f3a9d02445ac3c927f62809779448545ea9e07936c18f36aaf6.exe	kat591C.tmp
PID 2844 wrote to memory of 3388	2844	a1984fbfacc51f3a9d02445ac3c927f62809779448545ea9e07936c18f36aaf6.exe	kat591C.tmp

C:\Users\Admin\AppData\Local\Temp\a1984fbfacc51f3a9d02445ac3c927f62809779448545ea9e07936c18f36aaf6.exe
"C:\Users\Admin\AppData\Local\Temp\a1984fbfacc51f3a9d02445ac3c927f62809779448545ea9e07936c18f36aaf6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2844

C:\Users\Admin\AppData\Local\Temp\kat591C.tmp
C:\Users\Admin\AppData\Local\Temp\kat591C.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:3388

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\kat591C.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2844-0-0x0000000002270000-0x0000000002271000-memory.dmp

Filesize
4KB

Download
memory/2844-2-0x0000000004050000-0x0000000004199000-memory.dmp

Filesize
1.3MB

Download
memory/2844-9-0x0000000000400000-0x000000000061C000-memory.dmp

Filesize
2.1MB

Download
memory/3388-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3388-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3388-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3388-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3388-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3388-17-0x000000001DBB0000-0x000000001DE0F000-memory.dmp

Filesize
2.4MB

Download
memory/3388-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3388-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads