stealc | 11a69412aa73af0b6f2a510f359a5c6ee3239f652eb2f42831f3afdf885a0b6d

Analysis

max time kernel
92s
max time network
93s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
09/06/2024, 01:06

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General

Target
11a69412aa73af0b6f2a510f359a5c6ee3239f652eb2f42831f3afdf885a0b6d.exe
Size 277KB
Sample240609-bgdfysbb81
SHA256 11a69412aa73af0b6f2a510f359a5c6ee3239f652eb2f42831f3afdf885a0b6d
MD5 441faf942ce0407bd646c1e281b6dba0
SHA1 16d880c6293f149b3bdb7fbf9e1ce30064154485
SHA512 2e80e36e2c6f3b1f49038b3c6006ac00bfa2f4a3a076b6fbcbc965937a3bc434bc369526e18c81f98fe8c4695555fceab82d21bfebdef2ccf47d287a6e10c834
SSDEEP 3072:1gQGIYDLT57dIVNFQ3+824w2yj95GsYiq8VG4+221qYuzLxiN4i5Yd:1v/2LT5RGFC2bj959VG4+24qYuHxd
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc default12 discovery spyware stealer

Malware Config

Extracted

Family

stealc

Botnet

default12

http://185.172.128.170

Attributes

url_path
/7043a0c6a68d9c65.php

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc

Detect binaries embedding considerable number of MFA browser extension IDs. 2 IoCs

resource	yara_rule
behavioral2/memory/3544-90-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3544-89-0x0000000000400000-0x0000000001BC1000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs

Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 2 IoCs

resource	yara_rule
behavioral2/memory/3544-90-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3544-89-0x0000000000400000-0x0000000001BC1000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 2 IoCs

resource	yara_rule
behavioral2/memory/3544-90-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3544-89-0x0000000000400000-0x0000000001BC1000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Downloads MZ/PE file

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	11a69412aa73af0b6f2a510f359a5c6ee3239f652eb2f42831f3afdf885a0b6d.exe

Executes dropped EXE 1 IoCs

pid	Process
408	BGCFBGDHJK.exe

Loads dropped DLL 2 IoCs

pid	Process
3544	11a69412aa73af0b6f2a510f359a5c6ee3239f652eb2f42831f3afdf885a0b6d.exe
3544	11a69412aa73af0b6f2a510f359a5c6ee3239f652eb2f42831f3afdf885a0b6d.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4428	3544	WerFault.exe	81

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	11a69412aa73af0b6f2a510f359a5c6ee3239f652eb2f42831f3afdf885a0b6d.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	11a69412aa73af0b6f2a510f359a5c6ee3239f652eb2f42831f3afdf885a0b6d.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3544	11a69412aa73af0b6f2a510f359a5c6ee3239f652eb2f42831f3afdf885a0b6d.exe
3544	11a69412aa73af0b6f2a510f359a5c6ee3239f652eb2f42831f3afdf885a0b6d.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3544 wrote to memory of 4720	3544	11a69412aa73af0b6f2a510f359a5c6ee3239f652eb2f42831f3afdf885a0b6d.exe	90
PID 3544 wrote to memory of 4720	3544	11a69412aa73af0b6f2a510f359a5c6ee3239f652eb2f42831f3afdf885a0b6d.exe	90
PID 3544 wrote to memory of 4720	3544	11a69412aa73af0b6f2a510f359a5c6ee3239f652eb2f42831f3afdf885a0b6d.exe	90
PID 4720 wrote to memory of 408	4720	cmd.exe	94
PID 4720 wrote to memory of 408	4720	cmd.exe	94
PID 4720 wrote to memory of 408	4720	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\11a69412aa73af0b6f2a510f359a5c6ee3239f652eb2f42831f3afdf885a0b6d.exe
"C:\Users\Admin\AppData\Local\Temp\11a69412aa73af0b6f2a510f359a5c6ee3239f652eb2f42831f3afdf885a0b6d.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3544
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\BGCFBGDHJK.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4720
- - C:\Users\Admin\AppData\Local\Temp\BGCFBGDHJK.exe
    "C:\Users\Admin\AppData\Local\Temp\BGCFBGDHJK.exe"
    3⤵
    - Executes dropped EXE
    PID:408
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3544 -s 2448
  2⤵
  - Program crash
  PID:4428

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 3544 -ip 3544
1⤵
PID:4276

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Command and Control

Exfiltration

Impact

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Downloads

Are.docx

Path C:\ProgramData\Are.docx
Size 11KB
SHA256 5abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454
MD5 a33e5b189842c5867f46566bdbf7a095
SHA1 e1c06359f6a76da90d19e8fd95e79c832edb3196
SHA512 f2ad3812ec9b915e9618539b0f103f2e9acaad25fbbacd84941c954ce070af231324e83a4621e951c1dbae8d40d50410954e40dd52bbd46e34c54b0d1957407b
SSDEEP 192:CtNCEE33S7Ok0CMSYbcBVk6tqM16iPBkeawLWdxd7o3Lp:aNwC78uYbcBv6akwLWdxdE3Lp
MD5 SHA1 SHA512 SSDEEP

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mozglue.dll

Path C:\ProgramData\mozglue.dll
Size 593KB
SHA256 ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
MD5 c8fd9be83bc728cc04beffafc2907fe9
SHA1 95ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA512 fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
SSDEEP 12288:BlSyAom/gcRKMdRm4wFkRHuyG4RRGJVDjMk/x21R8gY/r:BKgcRKMdRm4wFkVVDGJVv//x21R8br
MD5 SHA1 SHA512 SSDEEP

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nss3.dll

Path C:\ProgramData\nss3.dll
Size 2.0MB
SHA256 ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
MD5 1cc453cdf74f31e4d913ff9c10acdde2
SHA1 6e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA512 dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571
SSDEEP 49152:fECf12gikHlnKGxJRIB+y5nvxnaOSJ3HFNWYrVvE4CQsgzMmQfTU1NrWmy4KoAzh:J7Tf8J1Q+SS5/nr
MD5 SHA1 SHA512 SSDEEP

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BGCFBGDHJK.exe

Path C:\Users\Admin\AppData\Local\Temp\BGCFBGDHJK.exe
Size 533KB
SHA256 64a71b664d76641b35dac312161cb356b3b3b5f0b45c9d88c8afa547b4902580
MD5 6c93fc68e2f01c20fb81af24470b790c
SHA1 d5927b38a32e30afcf5a658612a8266476fc4ad8
SHA512 355e9677121ef17cf8c398f0c17399776d206c62014080a2c62682e1152ea0729dcc6e233358dcd6bae009b07e3db936d4b18eb37d6e7ebc2fe9cf8d827c4ade
SSDEEP 6144:yU3iKBTO7hQqRGoFyLmVmH6Q4vwRuGuoBhYkuFqeYAOfp+5ic6/:yU7UVGoFyLmVO6Q6wAGuoBh9Np+M/
MD5 SHA1 SHA512 SSDEEP

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memory/3544-3-0x0000000000400000-0x000000000063B000-memory.dmp

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memory/3544-2-0x0000000001D30000-0x0000000001D57000-memory.dmp

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memory/3544-1-0x0000000001D90000-0x0000000001E90000-memory.dmp

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memory/3544-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/3544-90-0x0000000000400000-0x000000000063B000-memory.dmp

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memory/3544-89-0x0000000000400000-0x0000000001BC1000-memory.dmp

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