stealc | c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89

Analysis

max time kernel
120s
max time network
128s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
05/06/2024, 02:10

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General

Target

c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe
Size

3.6MB
MD5

131e367009cf014321e7a70e70c4067c
SHA1

4c02332af53519fdae235f804f5144ba9c7e725d
SHA256

c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89
SHA512

3702fefbcf4eab279484359f61d997b7c32d9c77dd9e255a44e96de9373d18b68ff262037494203f181c359aca549020dcfea3db01d11f8f51e224261259f99e
SSDEEP

49152:fWN3Bsjz4Ddee7wE4o40nQaoJab9Xejv2aH0n2EBvnE8/8OhkqdHG22T9d:f6ujz4DdeClnE8f4T

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

https://t.me/r8z0l

https://steamcommunity.com/profiles/76561199698764354

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 1 IoCs

stealer

resource	yara_rule
behavioral1/memory/2640-71-0x0000000000400000-0x0000000000648000-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

Detects Windows executables referencing non-Windows User-Agents 1 IoCs

resource	yara_rule
behavioral1/memory/2640-71-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 1 IoCs

resource	yara_rule
behavioral1/memory/2640-71-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL

Detects executables containing potential Windows Defender anti-emulation checks 1 IoCs

resource	yara_rule
behavioral1/memory/2640-71-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation

Downloads MZ/PE file
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

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 1368 set thread context of 2640	1368	c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe	28

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	RegAsm.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1676	timeout.exe

Modifies system certificate store 2 TTPs 3 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25	RegAsm.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25\Blob = 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	RegAsm.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25\Blob = 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	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2640	RegAsm.exe
2640	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1368	c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1368 wrote to memory of 2640	1368	c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe	28
PID 1368 wrote to memory of 2640	1368	c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe	28
PID 1368 wrote to memory of 2640	1368	c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe	28
PID 1368 wrote to memory of 2640	1368	c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe	28
PID 1368 wrote to memory of 2640	1368	c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe	28
PID 1368 wrote to memory of 2640	1368	c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe	28
PID 1368 wrote to memory of 2640	1368	c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe	28
PID 1368 wrote to memory of 2640	1368	c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe	28
PID 1368 wrote to memory of 2640	1368	c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe	28
PID 1368 wrote to memory of 2640	1368	c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe	28
PID 1368 wrote to memory of 2640	1368	c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe	28
PID 1368 wrote to memory of 2640	1368	c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe	28
PID 1368 wrote to memory of 2640	1368	c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe	28
PID 2640 wrote to memory of 2068	2640	RegAsm.exe	33
PID 2640 wrote to memory of 2068	2640	RegAsm.exe	33
PID 2640 wrote to memory of 2068	2640	RegAsm.exe	33
PID 2640 wrote to memory of 2068	2640	RegAsm.exe	33
PID 2068 wrote to memory of 1676	2068	cmd.exe	35
PID 2068 wrote to memory of 1676	2068	cmd.exe	35
PID 2068 wrote to memory of 1676	2068	cmd.exe	35
PID 2068 wrote to memory of 1676	2068	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe
"C:\Users\Admin\AppData\Local\Temp\c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1368
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Checks processor information in registry
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2640
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" & rd /s /q "C:\ProgramData\KJEGCFBGDHJJ" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2068
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:1676

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Subvert Trust Controls

T1553

Install Root Certificate

T1553.004

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarAF59.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
memory/1368-35-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-31-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-4-0x0000000000E00000-0x0000000000ECC000-memory.dmp

Filesize
816KB

Download
memory/1368-5-0x0000000000750000-0x000000000076C000-memory.dmp

Filesize
112KB

Download
memory/1368-6-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-37-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-47-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-65-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-64-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-61-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-59-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-57-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-55-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-53-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-51-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-49-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-45-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-33-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-41-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-39-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-3-0x0000000004BB0000-0x0000000004C9E000-memory.dmp

Filesize
952KB

Download
memory/1368-0-0x0000000074A4E000-0x0000000074A4F000-memory.dmp

Filesize
4KB

Download
memory/1368-43-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-29-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-27-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-25-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-23-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-21-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-19-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-17-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-16-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-13-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-11-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-9-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-7-0x0000000000750000-0x0000000000765000-memory.dmp

Filesize
84KB

Download
memory/1368-66-0x0000000074A40000-0x000000007512E000-memory.dmp

Filesize
6.9MB

Download
memory/1368-1-0x00000000012B0000-0x0000000001646000-memory.dmp

Filesize
3.6MB

Download
memory/1368-2-0x0000000074A40000-0x000000007512E000-memory.dmp

Filesize
6.9MB

Download
memory/1368-77-0x0000000074A40000-0x000000007512E000-memory.dmp

Filesize
6.9MB

Download
memory/2640-71-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2640-68-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2640-69-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2640-67-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download