stealc | 8dd45c3deaa091c3bdde3456ffde09709d17802c57d4d6dbdf6fc5d5d1e3c8fc

Analysis

max time kernel
143s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
05/10/2023, 12:49

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General

Target
file.exe
Size 255KB
Sample231005-p2cbaach98
SHA256 8dd45c3deaa091c3bdde3456ffde09709d17802c57d4d6dbdf6fc5d5d1e3c8fc
MD5 6569eceef4279ce644844d4183d91a35
SHA1 54e7b4001ff59286a31e4c3b29905f7e8bb1789a
SHA512 4cfd05afee174675e4c1c90c87a4b897c1c84a112e6805cc959aa313ec018428d7360bb585d5a513d52d3c0b2508236f16ad5f69f0234953a672975e7735c87c
SSDEEP 3072:3iyY7Rc0xtWBj4OsUPm2+GHYOcFci7OaMQrbN7WcAPAwlNOwjsOPWxDIkaNaL5sY:SyY7RKBMbUmGbcknE9WxYwztsPckaG
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

http://aidandylan.top

Attributes

url_path
/3886d2276f6914c4.php

rc4.plain

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Downloads MZ/PE file

Checks computer location settings 2 TTPs 2 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-1-5-21-2344688013-2965468717-2034126-1000\Control Panel\International\Geo\Nation	file.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2344688013-2965468717-2034126-1000\Control Panel\International\Geo\Nation	9395152325.exe

Executes dropped EXE 1 IoCs

pid	Process
2248	9395152325.exe

Loads dropped DLL 2 IoCs

pid	Process
2248	9395152325.exe
2248	9395152325.exe

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 2 IoCs

pid	pid_target	Process	procid_target
3728	1136	WerFault.exe	84
1492	2248	WerFault.exe	95

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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	9395152325.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	9395152325.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4468	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
3684	taskkill.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2248	9395152325.exe
2248	9395152325.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3684	taskkill.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1136 wrote to memory of 852	1136	file.exe	93
PID 1136 wrote to memory of 852	1136	file.exe	93
PID 1136 wrote to memory of 852	1136	file.exe	93
PID 852 wrote to memory of 2248	852	cmd.exe	95
PID 852 wrote to memory of 2248	852	cmd.exe	95
PID 852 wrote to memory of 2248	852	cmd.exe	95
PID 1136 wrote to memory of 4716	1136	file.exe	98
PID 1136 wrote to memory of 4716	1136	file.exe	98
PID 1136 wrote to memory of 4716	1136	file.exe	98
PID 4716 wrote to memory of 3684	4716	cmd.exe	101
PID 4716 wrote to memory of 3684	4716	cmd.exe	101
PID 4716 wrote to memory of 3684	4716	cmd.exe	101
PID 2248 wrote to memory of 504	2248	9395152325.exe	103
PID 2248 wrote to memory of 504	2248	9395152325.exe	103
PID 2248 wrote to memory of 504	2248	9395152325.exe	103
PID 504 wrote to memory of 4468	504	cmd.exe	107
PID 504 wrote to memory of 4468	504	cmd.exe	107
PID 504 wrote to memory of 4468	504	cmd.exe	107

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1136
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\9395152325.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:852
- - C:\Users\Admin\AppData\Local\Temp\9395152325.exe
    "C:\Users\Admin\AppData\Local\Temp\9395152325.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Loads dropped DLL
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2248
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\9395152325.exe" & del "C:\ProgramData\*.dll"" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:504
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 5
        5⤵
        Delays execution with timeout.exe
        
        PID:4468
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2248 -s 2580
      4⤵
      Program crash
      PID:1492
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4716
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3684
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1136 -s 1548
  2⤵
  - Program crash
  PID:3728

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 1136 -ip 1136
1⤵
PID:3204

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 2248 -ip 2248
1⤵
PID:1548

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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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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9395152325.exe

Path C:\Users\Admin\AppData\Local\Temp\9395152325.exe
Size 202KB
SHA256 60105053a8c43d3f3f63291c04e5485f938564f995cde262eb2014cf5d319208
MD5 042fe40a9dc436330754e183ac2b0b55
SHA1 397fd6687e026d09535ba00c7fabe6406eca7093
SHA512 e7087eb45609180a18a21f9911feadbc196b1844d3a6d737e20e156cfb6e34daf06cdd6472ad610dc7ce3efdb6ec99a2098f08b23a68582e44759e44a572de19
SSDEEP 3072:MRbYt6SBJ3VKOXtfNahBVXbb39pooZHcTRJfoZtkR5K/Vr:7tddVKMahBVXbbNVlMJGV
MD5 SHA1 SHA512 SSDEEP

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9395152325.exe

Path C:\Users\Admin\AppData\Local\Temp\9395152325.exe
Size 202KB
SHA256 60105053a8c43d3f3f63291c04e5485f938564f995cde262eb2014cf5d319208
MD5 042fe40a9dc436330754e183ac2b0b55
SHA1 397fd6687e026d09535ba00c7fabe6406eca7093
SHA512 e7087eb45609180a18a21f9911feadbc196b1844d3a6d737e20e156cfb6e34daf06cdd6472ad610dc7ce3efdb6ec99a2098f08b23a68582e44759e44a572de19
SSDEEP 3072:MRbYt6SBJ3VKOXtfNahBVXbb39pooZHcTRJfoZtkR5K/Vr:7tddVKMahBVXbbNVlMJGV
MD5 SHA1 SHA512 SSDEEP

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memory/1136-15-0x0000000000400000-0x00000000005B7000-memory.dmp

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memory/1136-16-0x0000000000400000-0x00000000005B7000-memory.dmp

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memory/1136-2-0x00000000021F0000-0x000000000222E000-memory.dmp

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memory/1136-3-0x0000000000400000-0x00000000005B7000-memory.dmp

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memory/1136-17-0x00000000021F0000-0x000000000222E000-memory.dmp

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memory/1136-1-0x0000000000680000-0x0000000000780000-memory.dmp

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memory/2248-20-0x00000000007B0000-0x00000000007CB000-memory.dmp

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memory/2248-75-0x0000000000650000-0x0000000000750000-memory.dmp

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memory/2248-49-0x0000000000400000-0x000000000062D000-memory.dmp

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memory/2248-21-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/2248-19-0x0000000000400000-0x000000000062D000-memory.dmp

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memory/2248-89-0x0000000000400000-0x000000000062D000-memory.dmp

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memory/2248-18-0x0000000000650000-0x0000000000750000-memory.dmp

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memory/2248-103-0x0000000000400000-0x000000000062D000-memory.dmp

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memory/2248-104-0x0000000000400000-0x000000000062D000-memory.dmp

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