stealc | 76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6

General

Target

76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe
Size

400KB
MD5

11e20aa257ca42b9c2542ca924e1a6e8
SHA1

3fdf848f8a6adabd8a22fe15867fb298db79c1e2
SHA256

76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6
SHA512

7c6b46b1e7cc29bd5168f8b9b41a9d64eb6c98fe6f95dedcf6427afe179710f784895a02557b546d97669ce9ad6e471f9d14b9d867607f21ca8e3d272095ae97
SSDEEP

6144:OlcU2rm3BeTtiBlMsHTlI/sCTaldjq5oUT/U3t53s7NJ6T93kAXLO2/Oo8aILP:LU2r+YTotZCYjYNo3tdkO/OxpP

Score

10^/10

stealc discovery spyware stealer upx

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.209

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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe

Executes dropped EXE 2 IoCs

pid	Process
1180	u3qs.0.exe
2328	u3qs.1.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

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000800000002322b-68.dat	upx
behavioral1/memory/2328-75-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral1/memory/2328-83-0x0000000000400000-0x0000000000930000-memory.dmp	upx

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
3908	4852	WerFault.exe	89

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	u3qs.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3qs.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
1908	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1180	u3qs.0.exe
1180	u3qs.0.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2328	u3qs.1.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4852 wrote to memory of 1180	4852	76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe	97
PID 4852 wrote to memory of 1180	4852	76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe	97
PID 4852 wrote to memory of 1180	4852	76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe	97
PID 4852 wrote to memory of 2328	4852	76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe	107
PID 4852 wrote to memory of 2328	4852	76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe	107
PID 4852 wrote to memory of 2328	4852	76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe	107
PID 2328 wrote to memory of 2636	2328	u3qs.1.exe	113
PID 2328 wrote to memory of 2636	2328	u3qs.1.exe	113
PID 2328 wrote to memory of 2636	2328	u3qs.1.exe	113
PID 2636 wrote to memory of 928	2636	cmd.exe	115
PID 2636 wrote to memory of 928	2636	cmd.exe	115
PID 2636 wrote to memory of 928	2636	cmd.exe	115
PID 2636 wrote to memory of 1908	2636	cmd.exe	116
PID 2636 wrote to memory of 1908	2636	cmd.exe	116
PID 2636 wrote to memory of 1908	2636	cmd.exe	116

C:\Users\Admin\AppData\Local\Temp\76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe
"C:\Users\Admin\AppData\Local\Temp\76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4852
- C:\Users\Admin\AppData\Local\Temp\u3qs.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3qs.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:1180
- C:\Users\Admin\AppData\Local\Temp\u3qs.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3qs.1.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2328
- - 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:2636
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:928
  - - 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:1908
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4852 -s 1640
  2⤵
  - Program crash
  PID:3908

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4852 -ip 4852
1⤵
PID:3660

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

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\u3qs.0.exe

Filesize
256KB

MD5
82b83e67d3fbc356a07420923abeed36

SHA1
4887991a4b7d243d3f343aa111027a9f4fd03ecd

SHA256
27d68b0754c0074f513e931700be53ba16fdcd76401bcf87149d46b5ba4e4be0

SHA512
8690c2d1aaf663457707f2b9cf6b0ad26af4a9a5dab2fc77f77064579ab2b4abdd45d339f02fc4f865034ec945672ce76b48ec187330ee8910bf1c1a489b0588

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3qs.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/1180-61-0x0000000000890000-0x0000000000990000-memory.dmp

Filesize
1024KB

Download
memory/1180-19-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1180-14-0x0000000000890000-0x0000000000990000-memory.dmp

Filesize
1024KB

Download
memory/1180-15-0x00000000007B0000-0x00000000007D7000-memory.dmp

Filesize
156KB

Download
memory/1180-16-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1180-109-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1180-104-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1180-63-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1180-22-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/1180-99-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2328-83-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/2328-86-0x0000000000B00000-0x0000000000B01000-memory.dmp

Filesize
4KB

Download
memory/2328-75-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/2328-76-0x0000000000B00000-0x0000000000B01000-memory.dmp

Filesize
4KB

Download
memory/4852-18-0x00000000006B0000-0x00000000007B0000-memory.dmp

Filesize
1024KB

Download
memory/4852-80-0x0000000000400000-0x0000000000569000-memory.dmp

Filesize
1.4MB

Download
memory/4852-2-0x00000000022D0000-0x000000000233E000-memory.dmp

Filesize
440KB

Download
memory/4852-3-0x0000000000400000-0x0000000000569000-memory.dmp

Filesize
1.4MB

Download
memory/4852-1-0x00000000006B0000-0x00000000007B0000-memory.dmp

Filesize
1024KB

Download
memory/4852-9-0x0000000000400000-0x0000000000569000-memory.dmp

Filesize
1.4MB

Download
memory/4852-17-0x0000000000400000-0x0000000000569000-memory.dmp

Filesize
1.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads