stealc | 1837622fbafa47eb30d479df4f4c97e41e54c9f65c99859b9b4ef195fa9bcdbc

Analysis

max time kernel
142s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
04/10/2023, 10:30

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General

Target
file.exe
Size 269KB
Sample231004-mjst7scg74
SHA256 1837622fbafa47eb30d479df4f4c97e41e54c9f65c99859b9b4ef195fa9bcdbc
MD5 815afad57e34d18bf204fbbfdf08904a
SHA1 a0b4bcb95b5ebf5a7db18fea617570f42f9248b3
SHA512 8430eca5105d2ec2c0299aa18dbcbfceb9fdc55c166a806c71c1b5adaabd962e5d399a4e4c51dd8cbf962b3d14d08309d1620ba015939eccfa66554e3e422565
SSDEEP 6144:oR6Saj92X8pS12L5HCQ1gBn5lU1NWgusrwGY:+apF5X1gBn5ijrwGY
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-1-5-21-2890696111-2332180956-3312704074-1000\Control Panel\International\Geo\Nation	file.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2890696111-2332180956-3312704074-1000\Control Panel\International\Geo\Nation	9374917229.exe

Executes dropped EXE 1 IoCs

pid	Process
4432	9374917229.exe

Loads dropped DLL 2 IoCs

pid	Process
4432	9374917229.exe
4432	9374917229.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
60	1108	WerFault.exe	84
2328	4432	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 opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	9374917229.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	9374917229.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3764	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
3792	taskkill.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4432	9374917229.exe
4432	9374917229.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3792	taskkill.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1108 wrote to memory of 3840	1108	file.exe	93
PID 1108 wrote to memory of 3840	1108	file.exe	93
PID 1108 wrote to memory of 3840	1108	file.exe	93
PID 3840 wrote to memory of 4432	3840	cmd.exe	95
PID 3840 wrote to memory of 4432	3840	cmd.exe	95
PID 3840 wrote to memory of 4432	3840	cmd.exe	95
PID 1108 wrote to memory of 1016	1108	file.exe	98
PID 1108 wrote to memory of 1016	1108	file.exe	98
PID 1108 wrote to memory of 1016	1108	file.exe	98
PID 1016 wrote to memory of 3792	1016	cmd.exe	102
PID 1016 wrote to memory of 3792	1016	cmd.exe	102
PID 1016 wrote to memory of 3792	1016	cmd.exe	102
PID 4432 wrote to memory of 4824	4432	9374917229.exe	104
PID 4432 wrote to memory of 4824	4432	9374917229.exe	104
PID 4432 wrote to memory of 4824	4432	9374917229.exe	104
PID 4824 wrote to memory of 3764	4824	cmd.exe	107
PID 4824 wrote to memory of 3764	4824	cmd.exe	107
PID 4824 wrote to memory of 3764	4824	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:1108
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\9374917229.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3840
- - C:\Users\Admin\AppData\Local\Temp\9374917229.exe
    "C:\Users\Admin\AppData\Local\Temp\9374917229.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:4432
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\9374917229.exe" & del "C:\ProgramData\*.dll"" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4824
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 5
        5⤵
        Delays execution with timeout.exe
        
        PID:3764
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4432 -s 2524
      4⤵
      Program crash
      PID:2328
- 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:1016
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3792
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1108 -s 1500
  2⤵
  - Program crash
  PID:60

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 1108 -ip 1108
1⤵
PID:2056

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 4432 -ip 4432
1⤵
PID:1680

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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9374917229.exe

Path C:\Users\Admin\AppData\Local\Temp\9374917229.exe
Size 208KB
SHA256 7056ab5273f4cd183c62aaffb079a4a1011e17646f54cd192e05c98363a6602d
MD5 05a2fdb4cf738095c513a10b86e52e1d
SHA1 65ef32dad0ddcfaaa0acd04bb15763c0abcf517e
SHA512 9b95eb9c096fa7d40baea9c3386deb9d20da046ec2faa555e3dd442aa78e067033a460503cc4a38f955644a12500817ee196999fca2892af2486a2f131e72036
SSDEEP 3072:KuJTH4UOhi9Ex4Cuz0DbL4iHtdFt1ta7y4ARjiG7RJ5Uwt87h4:KUOgC4Cuzc4GtdFtrTRjiGqw
MD5 SHA1 SHA512 SSDEEP

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9374917229.exe

Path C:\Users\Admin\AppData\Local\Temp\9374917229.exe
Size 208KB
SHA256 7056ab5273f4cd183c62aaffb079a4a1011e17646f54cd192e05c98363a6602d
MD5 05a2fdb4cf738095c513a10b86e52e1d
SHA1 65ef32dad0ddcfaaa0acd04bb15763c0abcf517e
SHA512 9b95eb9c096fa7d40baea9c3386deb9d20da046ec2faa555e3dd442aa78e067033a460503cc4a38f955644a12500817ee196999fca2892af2486a2f131e72036
SSDEEP 3072:KuJTH4UOhi9Ex4Cuz0DbL4iHtdFt1ta7y4ARjiG7RJ5Uwt87h4:KUOgC4Cuzc4GtdFtrTRjiGqw
MD5 SHA1 SHA512 SSDEEP

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memory/1108-15-0x0000000000400000-0x00000000005BB000-memory.dmp

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memory/1108-17-0x0000000002320000-0x000000000235E000-memory.dmp

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memory/1108-2-0x0000000002320000-0x000000000235E000-memory.dmp

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memory/1108-3-0x0000000000400000-0x00000000005BB000-memory.dmp

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memory/1108-1-0x00000000005F0000-0x00000000006F0000-memory.dmp

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memory/4432-21-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/4432-78-0x00000000006B0000-0x00000000007B0000-memory.dmp

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memory/4432-62-0x0000000000400000-0x000000000062D000-memory.dmp

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memory/4432-18-0x00000000006B0000-0x00000000007B0000-memory.dmp

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memory/4432-20-0x0000000002230000-0x000000000224B000-memory.dmp

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memory/4432-90-0x0000000000400000-0x000000000062D000-memory.dmp

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memory/4432-19-0x0000000000400000-0x000000000062D000-memory.dmp

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memory/4432-107-0x0000000000400000-0x000000000062D000-memory.dmp

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memory/4432-108-0x0000000000400000-0x000000000062D000-memory.dmp

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