stealc | dbee3dbe90cbe6fefd612f476a0f8e34f0f74bdd4785db3adc424efaff3f3ac4

Analysis

max time kernel
143s
max time network
150s
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, 09:14

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General

Target
file.exe
Size 269KB
Sample231004-k7a8yscc94
SHA256 dbee3dbe90cbe6fefd612f476a0f8e34f0f74bdd4785db3adc424efaff3f3ac4
MD5 1828a13c95d3f975f96e7a44cd189f02
SHA1 24720e1175635374522cb42f72420e584d916e67
SHA512 7aae3de662f33663727edfe4a4dff473da7a344344b12ca75a9b1e43d6a271a46c1965ed4f15673b1e84c55385d0c264aee9730e146ecc2c9013e9ea1c9e9d97
SSDEEP 6144:91AvK38GS9qPc3CTQeEM49E7D71Wxohy9OGQth8Tv:9n3pHPcSsxM7D6vi2Tv
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-1-5-21-3027552071-446050021-1254071215-1000\Control Panel\International\Geo\Nation	file.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3027552071-446050021-1254071215-1000\Control Panel\International\Geo\Nation	7646695277.exe

Executes dropped EXE 1 IoCs

pid	Process
4840	7646695277.exe

Loads dropped DLL 2 IoCs

pid	Process
4840	7646695277.exe
4840	7646695277.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
2844	4900	WerFault.exe	81
1436	4840	WerFault.exe	96

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	7646695277.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	7646695277.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1400	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2948	taskkill.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4840	7646695277.exe
4840	7646695277.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2948	taskkill.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4900 wrote to memory of 2624	4900	file.exe	94
PID 4900 wrote to memory of 2624	4900	file.exe	94
PID 4900 wrote to memory of 2624	4900	file.exe	94
PID 2624 wrote to memory of 4840	2624	cmd.exe	96
PID 2624 wrote to memory of 4840	2624	cmd.exe	96
PID 2624 wrote to memory of 4840	2624	cmd.exe	96
PID 4900 wrote to memory of 3520	4900	file.exe	99
PID 4900 wrote to memory of 3520	4900	file.exe	99
PID 4900 wrote to memory of 3520	4900	file.exe	99
PID 3520 wrote to memory of 2948	3520	cmd.exe	102
PID 3520 wrote to memory of 2948	3520	cmd.exe	102
PID 3520 wrote to memory of 2948	3520	cmd.exe	102
PID 4840 wrote to memory of 5020	4840	7646695277.exe	104
PID 4840 wrote to memory of 5020	4840	7646695277.exe	104
PID 4840 wrote to memory of 5020	4840	7646695277.exe	104
PID 5020 wrote to memory of 1400	5020	cmd.exe	107
PID 5020 wrote to memory of 1400	5020	cmd.exe	107
PID 5020 wrote to memory of 1400	5020	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:4900
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\7646695277.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2624
- - C:\Users\Admin\AppData\Local\Temp\7646695277.exe
    "C:\Users\Admin\AppData\Local\Temp\7646695277.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:4840
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\7646695277.exe" & del "C:\ProgramData\*.dll"" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:5020
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 5
        5⤵
        Delays execution with timeout.exe
        
        PID:1400
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4840 -s 2420
      4⤵
      Program crash
      PID:1436
- 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:3520
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2948
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4900 -s 1516
  2⤵
  - Program crash
  PID:2844

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4900 -ip 4900
1⤵
PID:4396

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 4840 -ip 4840
1⤵
PID:5040

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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7646695277.exe

Path C:\Users\Admin\AppData\Local\Temp\7646695277.exe
Size 209KB
SHA256 379d7e1b917a60e383e71c5958a53a76f69b49bc13ceed1b5ba8752ab408487c
MD5 4f2cf99d6dace2a72a2052586dbef94b
SHA1 da87b49837715f38b285ff759960cd250b47d3b3
SHA512 dd5d98ad72464ac5efcec1377358067cff1787e8a0206eebcc1aec4a3c476601dea436418e7bf573f4374b923cfcbb0b84e08e6cffb16447e14e51842357fe0b
SSDEEP 3072:c9aW+ZkhHVBG3yl9T2lps9QtvAxWCtapCdTyUAiOS5CiKt8Ih:5ZkFfMyl5etvGJVdLAQK
MD5 SHA1 SHA512 SSDEEP

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7646695277.exe

Path C:\Users\Admin\AppData\Local\Temp\7646695277.exe
Size 209KB
SHA256 379d7e1b917a60e383e71c5958a53a76f69b49bc13ceed1b5ba8752ab408487c
MD5 4f2cf99d6dace2a72a2052586dbef94b
SHA1 da87b49837715f38b285ff759960cd250b47d3b3
SHA512 dd5d98ad72464ac5efcec1377358067cff1787e8a0206eebcc1aec4a3c476601dea436418e7bf573f4374b923cfcbb0b84e08e6cffb16447e14e51842357fe0b
SSDEEP 3072:c9aW+ZkhHVBG3yl9T2lps9QtvAxWCtapCdTyUAiOS5CiKt8Ih:5ZkFfMyl5etvGJVdLAQK
MD5 SHA1 SHA512 SSDEEP

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memory/4840-20-0x0000000000710000-0x000000000072B000-memory.dmp

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memory/4840-89-0x0000000000730000-0x0000000000830000-memory.dmp

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memory/4840-104-0x0000000000400000-0x000000000062D000-memory.dmp

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memory/4840-19-0x0000000000730000-0x0000000000830000-memory.dmp

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memory/4840-90-0x0000000000400000-0x000000000062D000-memory.dmp

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memory/4840-21-0x0000000000400000-0x000000000062D000-memory.dmp

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memory/4840-22-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/4840-60-0x0000000000400000-0x000000000062D000-memory.dmp

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memory/4900-1-0x0000000000870000-0x0000000000970000-memory.dmp

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memory/4900-15-0x0000000000400000-0x00000000005BB000-memory.dmp

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memory/4900-3-0x0000000000400000-0x00000000005BB000-memory.dmp

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memory/4900-16-0x0000000000870000-0x0000000000970000-memory.dmp

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memory/4900-18-0x0000000000820000-0x000000000085E000-memory.dmp

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memory/4900-2-0x0000000000820000-0x000000000085E000-memory.dmp

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memory/4900-17-0x0000000000400000-0x00000000005BB000-memory.dmp

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