stealc | 3d07b09f83f2fc5dcb7f2429cac9a37160181da77df5a429e37b98dd685f239f

General

Target

3d07b09f83f2fc5dcb7f2429cac9a37160181da77df5a429e37b98dd685f239f.exe
Size

352KB
MD5

a74811b7e2d71612463144c69c0ca7e2
SHA1

900132a2213f70aed06e9982e47cfdcc8964b710
SHA256

3d07b09f83f2fc5dcb7f2429cac9a37160181da77df5a429e37b98dd685f239f
SHA512

c4c5bef04693f000ae1f45d2a2d28f67609f36a635464d5025a50b939eaf9cc8d7766355990847f5679375f3d4b760e035dd92914f754ae64df6923da1cecebe
SSDEEP

6144:IsCv/QNuZNjDPp9XC2Fgd6dwiJLR8ATGb5gBJYgEltzK5d5Sw+tuhdZUui/EO:I/+uZNjDPNGeR85+YgEf25CtuhLi/EO

Score

10^/10

stealc cuapfss discovery spyware stealer

Malware Config

Extracted

Family

stealc

Botnet

cuapfss

C2

http://23.88.106.134

Attributes

url_path
/6a9f8e2503d99c04.php

Signatures

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

Loads dropped DLL 2 IoCs

pid	Process
204	RegAsm.exe
204	RegAsm.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
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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3660 set thread context of 204	3660	3d07b09f83f2fc5dcb7f2429cac9a37160181da77df5a429e37b98dd685f239f.exe	75

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	RegAsm.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
204	RegAsm.exe
204	RegAsm.exe
204	RegAsm.exe
204	RegAsm.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3660 wrote to memory of 3164	3660	3d07b09f83f2fc5dcb7f2429cac9a37160181da77df5a429e37b98dd685f239f.exe	74
PID 3660 wrote to memory of 3164	3660	3d07b09f83f2fc5dcb7f2429cac9a37160181da77df5a429e37b98dd685f239f.exe	74
PID 3660 wrote to memory of 3164	3660	3d07b09f83f2fc5dcb7f2429cac9a37160181da77df5a429e37b98dd685f239f.exe	74
PID 3660 wrote to memory of 204	3660	3d07b09f83f2fc5dcb7f2429cac9a37160181da77df5a429e37b98dd685f239f.exe	75
PID 3660 wrote to memory of 204	3660	3d07b09f83f2fc5dcb7f2429cac9a37160181da77df5a429e37b98dd685f239f.exe	75
PID 3660 wrote to memory of 204	3660	3d07b09f83f2fc5dcb7f2429cac9a37160181da77df5a429e37b98dd685f239f.exe	75
PID 3660 wrote to memory of 204	3660	3d07b09f83f2fc5dcb7f2429cac9a37160181da77df5a429e37b98dd685f239f.exe	75
PID 3660 wrote to memory of 204	3660	3d07b09f83f2fc5dcb7f2429cac9a37160181da77df5a429e37b98dd685f239f.exe	75
PID 3660 wrote to memory of 204	3660	3d07b09f83f2fc5dcb7f2429cac9a37160181da77df5a429e37b98dd685f239f.exe	75
PID 3660 wrote to memory of 204	3660	3d07b09f83f2fc5dcb7f2429cac9a37160181da77df5a429e37b98dd685f239f.exe	75
PID 3660 wrote to memory of 204	3660	3d07b09f83f2fc5dcb7f2429cac9a37160181da77df5a429e37b98dd685f239f.exe	75
PID 3660 wrote to memory of 204	3660	3d07b09f83f2fc5dcb7f2429cac9a37160181da77df5a429e37b98dd685f239f.exe	75

C:\Users\Admin\AppData\Local\Temp\3d07b09f83f2fc5dcb7f2429cac9a37160181da77df5a429e37b98dd685f239f.exe
"C:\Users\Admin\AppData\Local\Temp\3d07b09f83f2fc5dcb7f2429cac9a37160181da77df5a429e37b98dd685f239f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3660
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:3164
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:204

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

3

T1552

Credentials In Files

3

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\mozglue.dll

Filesize
128KB

MD5
a47c9a22d04f7a89ffb338ec0d9163f2

SHA1
c779b4e0bd380889d053a5a2e64fac7e5c9f0d85

SHA256
c67b8f01d1b007cf0abea4f89d1272a146116b398d97c0873889e4f3bc1aa2a5

SHA512
64ebbee2f2f0884096e5b0996b30adae289549ba24f19fb3858f638148f358cd9a6f2fb370c0b2a44e821cb00b5a49468f849c97e9aa8ee413bbae11b57d72f4

Download Submit
\ProgramData\nss3.dll

Filesize
128KB

MD5
34772db675889069f256a8ad143554c2

SHA1
2e6ceda2c0267e8fe1d4f24860d46b26fdb63117

SHA256
e4eafcf079025ec65956c46c5294a5122fa18a3836569784507dd9e9b5a5afde

SHA512
e97495dbf030e37f52eb61ce9850d919ad09d0d8fa4200b88c213927b1f29fb7d29393d698943b68987a37c9d896b6d61eb6c7e631013b5c22566248f40480fd

Download Submit
memory/204-1-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/204-4-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/204-5-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/204-6-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/204-64-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/3660-2-0x00000000001F0000-0x00000000001F1000-memory.dmp

Filesize
4KB

Download
memory/3660-0-0x00000000001F0000-0x00000000001F1000-memory.dmp

Filesize
4KB

Download

Analysis

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