stealc | 3d78a99c4ca146da6281b4d37bae957e17b23c1439b72daac8584df46179bbfe

General

Target

3d78a99c4ca146da6281b4d37bae957e17b23c1439b72daac8584df46179bbfe.exe
Size

2.1MB
MD5

d2f26faa6e51839385b5b7bb9c8bdf94
SHA1

e35b9e92219faae2f10c6a67c5c450f1d0bf8a75
SHA256

3d78a99c4ca146da6281b4d37bae957e17b23c1439b72daac8584df46179bbfe
SHA512

34d85b01650375b1a1bfad518cd1ce920cf9e4b773f01381a5a493a1166a64fb944be3afa7a2fbee79e83803f9f3e9aa64b378f16949ca94c6fab7d537339d99
SSDEEP

49152:N6uDuaS9refuIJtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb9TItIuoITsdZ

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/636-2-0x0000000004050000-0x0000000004199000-memory.dmp	family_vidar_v7
behavioral2/memory/3048-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3048-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3048-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3048-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3048-18-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3048-35-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3048-36-0x0000000000400000-0x0000000000646000-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
3048	kat5081.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 636 set thread context of 3048	636	3d78a99c4ca146da6281b4d37bae957e17b23c1439b72daac8584df46179bbfe.exe	85

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	kat5081.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3048	kat5081.tmp
3048	kat5081.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 636 wrote to memory of 3048	636	3d78a99c4ca146da6281b4d37bae957e17b23c1439b72daac8584df46179bbfe.exe	85
PID 636 wrote to memory of 3048	636	3d78a99c4ca146da6281b4d37bae957e17b23c1439b72daac8584df46179bbfe.exe	85
PID 636 wrote to memory of 3048	636	3d78a99c4ca146da6281b4d37bae957e17b23c1439b72daac8584df46179bbfe.exe	85
PID 636 wrote to memory of 3048	636	3d78a99c4ca146da6281b4d37bae957e17b23c1439b72daac8584df46179bbfe.exe	85
PID 636 wrote to memory of 3048	636	3d78a99c4ca146da6281b4d37bae957e17b23c1439b72daac8584df46179bbfe.exe	85
PID 636 wrote to memory of 3048	636	3d78a99c4ca146da6281b4d37bae957e17b23c1439b72daac8584df46179bbfe.exe	85
PID 636 wrote to memory of 3048	636	3d78a99c4ca146da6281b4d37bae957e17b23c1439b72daac8584df46179bbfe.exe	85
PID 636 wrote to memory of 3048	636	3d78a99c4ca146da6281b4d37bae957e17b23c1439b72daac8584df46179bbfe.exe	85

C:\Users\Admin\AppData\Local\Temp\3d78a99c4ca146da6281b4d37bae957e17b23c1439b72daac8584df46179bbfe.exe
"C:\Users\Admin\AppData\Local\Temp\3d78a99c4ca146da6281b4d37bae957e17b23c1439b72daac8584df46179bbfe.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:636
- C:\Users\Admin\AppData\Local\Temp\kat5081.tmp
  C:\Users\Admin\AppData\Local\Temp\kat5081.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3048

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\kat5081.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/636-0-0x00000000008D0000-0x00000000008D1000-memory.dmp

Filesize
4KB

Download
memory/636-2-0x0000000004050000-0x0000000004199000-memory.dmp

Filesize
1.3MB

Download
memory/636-9-0x0000000000400000-0x000000000061C000-memory.dmp

Filesize
2.1MB

Download
memory/3048-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3048-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3048-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3048-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3048-18-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3048-21-0x000000001B750000-0x000000001B9AF000-memory.dmp

Filesize
2.4MB

Download
memory/3048-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3048-36-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

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