stealc | 9812603762750e9c7f315fb61af78500b53825efe667075d59f8a2a3166ffc73

General

Target

$TEMP/InstallSetup_two.exe
Size

389KB
MD5

7f2aac24f16d203a97d3c7254a63bc71
SHA1

65f8434002b427921f403dc027eae66880bb6e01
SHA256

9f56ec46e05975f481d63d3a9e2f3e18b582f336fe3560d2a2d3be3c1caf54a9
SHA512

389555b63b29d9b6b98963a98b9bc1743c2bea98d69a614613e257de407befdacd1c5711af8968dba3fff56fb339233306a97123bfbf0f97aeca506b1021a50b
SSDEEP

12288:93B54IplrzKx282J8CzYwd+RrOmC6duyJ5:X54IXnKxD2xIOmayJ5

Score

10^/10

stealc discovery spyware stealer upx

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.145

Attributes

url_path
/3cd2b41cbde8fc9c.php

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	InstallSetup_two.exe

Executes dropped EXE 2 IoCs

pid	Process
3196	u3sc.0.exe
4912	u3sc.1.exe

Loads dropped DLL 2 IoCs

pid	Process
3196	u3sc.0.exe
3196	u3sc.0.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

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral4/files/0x0007000000023221-28.dat	upx
behavioral4/memory/4912-35-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral4/memory/4912-81-0x0000000000400000-0x0000000000930000-memory.dmp	upx

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
4168	4908	WerFault.exe	86

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	u3sc.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3sc.0.exe

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2268	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3196	u3sc.0.exe
3196	u3sc.0.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4912	u3sc.1.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4908 wrote to memory of 3196	4908	InstallSetup_two.exe	91
PID 4908 wrote to memory of 3196	4908	InstallSetup_two.exe	91
PID 4908 wrote to memory of 3196	4908	InstallSetup_two.exe	91
PID 4908 wrote to memory of 4912	4908	InstallSetup_two.exe	101
PID 4908 wrote to memory of 4912	4908	InstallSetup_two.exe	101
PID 4908 wrote to memory of 4912	4908	InstallSetup_two.exe	101
PID 4912 wrote to memory of 3484	4912	u3sc.1.exe	105
PID 4912 wrote to memory of 3484	4912	u3sc.1.exe	105
PID 4912 wrote to memory of 3484	4912	u3sc.1.exe	105
PID 3484 wrote to memory of 3644	3484	cmd.exe	107
PID 3484 wrote to memory of 3644	3484	cmd.exe	107
PID 3484 wrote to memory of 3644	3484	cmd.exe	107
PID 3484 wrote to memory of 2268	3484	cmd.exe	108
PID 3484 wrote to memory of 2268	3484	cmd.exe	108
PID 3484 wrote to memory of 2268	3484	cmd.exe	108

C:\Users\Admin\AppData\Local\Temp\$TEMP\InstallSetup_two.exe
"C:\Users\Admin\AppData\Local\Temp\$TEMP\InstallSetup_two.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4908
- C:\Users\Admin\AppData\Local\Temp\u3sc.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3sc.0.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3196
- C:\Users\Admin\AppData\Local\Temp\u3sc.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3sc.1.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4912
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3484
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:3644
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /tn "MalayamaraUpdate" /tr "'C:\Users\Admin\AppData\Local\Temp\Updater.exe'" /sc minute /mo 30 /F
      4⤵
      Creates scheduled task(s)
      PID:2268
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4908 -s 1052
  2⤵
  - Program crash
  PID:4168

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4908 -ip 4908
1⤵
PID:4468

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Unsecured Credentials

3

T1552

Credentials In Files

3

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\mozglue.dll

Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
C:\ProgramData\nss3.dll

Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3sc.0.exe

Filesize
236KB

MD5
36a1ec4f6396e2e57e66d68ca5907dea

SHA1
384ced40efd2f310895d9e82562fff5eca83893f

SHA256
1761d2907e458c49759b82927822c5b501f0bf94d58bdce4b458105bdb3c1da7

SHA512
907e6a272aeecfd61edf8000393ea5febcfaa64c154b2c7509e65f5c2ba45791862bb744eee150f19aa0f26223e3a4d01425802aeae22370b300b9ff4c602c42

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3sc.1.exe

Filesize
1.7MB

MD5
eee5ddcffbed16222cac0a1b4e2e466e

SHA1
28b40c88b8ea50b0782e2bcbb4cc0f411035f3d5

SHA256
2a40e5dccc7526c4982334941c90f95374460e2a816e84e724e98c4d52ae8c54

SHA512
8f88901f3ebd425818db09f268df19ccf8a755603f04e9481bcf02b112a84393f8a900ead77f8f971bfa33fd9fa5636b7494aaee864a0fb04e3273911a4216dc

Download Submit
C:\Users\Admin\AppData\Roaming\Temp\Task.bat

Filesize
128B

MD5
11bb3db51f701d4e42d3287f71a6a43e

SHA1
63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

SHA256
6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

SHA512
907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

Download Submit
memory/3196-20-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/3196-17-0x0000000002260000-0x0000000002287000-memory.dmp

Filesize
156KB

Download
memory/3196-123-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/3196-80-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/3196-18-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/3196-16-0x00000000006F0000-0x00000000007F0000-memory.dmp

Filesize
1024KB

Download
memory/3196-134-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/3196-34-0x00000000006F0000-0x00000000007F0000-memory.dmp

Filesize
1024KB

Download
memory/3196-96-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/3196-89-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/3196-37-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/3196-85-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/3196-146-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4908-19-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4908-53-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4908-23-0x0000000002100000-0x0000000002167000-memory.dmp

Filesize
412KB

Download
memory/4908-22-0x0000000000760000-0x0000000000860000-memory.dmp

Filesize
1024KB

Download
memory/4908-1-0x0000000000760000-0x0000000000860000-memory.dmp

Filesize
1024KB

Download
memory/4908-3-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4908-2-0x0000000002100000-0x0000000002167000-memory.dmp

Filesize
412KB

Download
memory/4912-81-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/4912-36-0x0000000000C40000-0x0000000000C41000-memory.dmp

Filesize
4KB

Download
memory/4912-91-0x0000000000C40000-0x0000000000C41000-memory.dmp

Filesize
4KB

Download
memory/4912-35-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads