stealc | b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586

Analysis

max time kernel
121s
max time network
125s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
15-06-2024 02:02

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General

Target

b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe
Size

4.0MB
MD5

04976c9e6aa8481402075c917916a83e
SHA1

4079a6cca10bbdaccd13401f30a1a95276db7eb9
SHA256

b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586
SHA512

4ea2b676678d883457e434bbeee3cd3f88f0eb3c80013551459077c064b5f6103dd1b51882cf4c56f52d5369d1c4e00d0f3cd1db006c804fcdb7333292e7402a
SSDEEP

49152:u70LoELHB0Bw+PQQEB8Im+XkOAwuzIeIEJgHLXIizBMBaPKVY:uI0ELm/keIECrXId4aY

Score

10^/10

stealc vidar spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

https://88.99.127.107

https://t.me/memve4erin

https://steamcommunity.com/profiles/76561199699680841

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Signatures

Detect Vidar Stealer 2 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/2432-81-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2432-559-0x0000000000400000-0x0000000000648000-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

Detect binaries embedding considerable number of MFA browser extension IDs. 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2432-559-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs

Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2432-559-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs

Detects Windows executables referencing non-Windows User-Agents 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2432-81-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2432-559-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2432-559-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2432-81-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral1/memory/2432-559-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL

Detects executables containing potential Windows Defender anti-emulation checks 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2432-81-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral1/memory/2432-559-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation

Downloads MZ/PE file
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001

Suspicious use of SetThreadContext 1 IoCs

Processes:

b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe

description	pid	process	target process
PID 2584 set thread context of 2432	2584	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe

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:

MSBuild.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString MSBuild.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1940 timeout.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

MSBuild.exe

pid process

2432 MSBuild.exe
2432 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe

description pid process

Token: SeDebugPrivilege 2584 b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe

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

pid	process
1940	timeout.exe

pid	process
2432	MSBuild.exe
2432	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	2584	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exeMSBuild.execmd.exe

description	pid	process	target process
PID 2584 wrote to memory of 2432	2584	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2584 wrote to memory of 2432	2584	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2584 wrote to memory of 2432	2584	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2584 wrote to memory of 2432	2584	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2584 wrote to memory of 2432	2584	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2584 wrote to memory of 2432	2584	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2584 wrote to memory of 2432	2584	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2584 wrote to memory of 2432	2584	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2584 wrote to memory of 2432	2584	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2584 wrote to memory of 2432	2584	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2432 wrote to memory of 2220	2432	MSBuild.exe	cmd.exe
PID 2432 wrote to memory of 2220	2432	MSBuild.exe	cmd.exe
PID 2432 wrote to memory of 2220	2432	MSBuild.exe	cmd.exe
PID 2432 wrote to memory of 2220	2432	MSBuild.exe	cmd.exe
PID 2220 wrote to memory of 1940	2220	cmd.exe	timeout.exe
PID 2220 wrote to memory of 1940	2220	cmd.exe	timeout.exe
PID 2220 wrote to memory of 1940	2220	cmd.exe	timeout.exe
PID 2220 wrote to memory of 1940	2220	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe
"C:\Users\Admin\AppData\Local\Temp\b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2584

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
2⤵
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2432

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\GDHIEHJEBAAF" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:2220

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:1940

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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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\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize
342B

MD5
e7f02924c23127a21672e574c6e3eed6

SHA1
cf70a20f90cdb6693737fcdbfc4c32e409f33b4a

SHA256
370cc894ca5258910856541eb5299e7a0a9f7c162471a0937c50ec1e064e969a

SHA512
2f2944204dcab84f66b6d8383e9eac10ee5bde21c297969314ff2b7a642843833c434e54cf0a6057db0dfec759f5129e1e3122b4ada67d492a92135bf088a916

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarF09D.tmp
Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
memory/2432-68-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2432-559-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2432-81-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2432-69-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2584-37-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-29-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-65-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-61-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-59-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-57-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-55-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-53-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-51-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-49-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-47-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-45-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-43-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-41-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-39-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-0-0x0000000074A3E000-0x0000000074A3F000-memory.dmp

Filesize
4KB

Download
memory/2584-35-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-33-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-31-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-19-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-27-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-25-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-23-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-21-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-15-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-13-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-11-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-9-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-7-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-63-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-66-0x0000000074A30000-0x000000007511E000-memory.dmp

Filesize
6.9MB

Download
memory/2584-17-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-6-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2584-5-0x0000000000630000-0x000000000064C000-memory.dmp

Filesize
112KB

Download
memory/2584-82-0x0000000074A30000-0x000000007511E000-memory.dmp

Filesize
6.9MB

Download
memory/2584-4-0x0000000004B80000-0x0000000004C7A000-memory.dmp

Filesize
1000KB

Download
memory/2584-3-0x0000000074A30000-0x000000007511E000-memory.dmp

Filesize
6.9MB

Download
memory/2584-2-0x0000000004FC0000-0x0000000005104000-memory.dmp

Filesize
1.3MB

Download
memory/2584-1-0x00000000010B0000-0x00000000014AC000-memory.dmp

Filesize
4.0MB

Download