stealc | f141b5eee77d2391f8ff169914873e1219c2b47ebfde2b5bdfc0af7c6e08217b

General

Target

f141b5eee77d2391f8ff169914873e1219c2b47ebfde2b5bdfc0af7c6e08217b.exe
Size

5.3MB
MD5

4eda5246e489dfa5edadc1a46221b9b6
SHA1

5d11b441365ea64090f34c68b4cf47b9d2d701dc
SHA256

f141b5eee77d2391f8ff169914873e1219c2b47ebfde2b5bdfc0af7c6e08217b
SHA512

783b801030b15b53633509ed36c815d928a67e9c833d2c8a2cc368fda8a5b76386c34ca767636d0fd3d0262ee059af89784324701eac46f4867f8ea9e74f4625
SSDEEP

49152:Kh8VUIicvXIXj97Nf50oyGRUxhtIHsWZsn+We5l7BGthQ3QTNxGSr+GiM+t2aVo/:Kh8VUIi4XIp7Nh0asO5JoHt7XXA2psO

Score

10^/10

stealc zgrat rat spyware stealer

Malware Config

Extracted

Family

stealc

C2

http://94.156.8.100

Attributes

url_path
/5dce321003e6a6b5.php

Signatures

Detect ZGRat V1 1 IoCs

resource	yara_rule
behavioral2/memory/2660-1-0x0000000000970000-0x0000000000EC4000-memory.dmp	family_zgrat_v1

Stealc
Stealc is an infostealer written in C++.
stealer stealc
ZGRat
ZGRat is remote access trojan written in C#.
rat zgrat

Detect binaries embedding considerable number of MFA browser extension IDs. 2 IoCs

resource	yara_rule
behavioral2/memory/5048-74-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/5048-100-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs

Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 2 IoCs

resource	yara_rule
behavioral2/memory/5048-74-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/5048-100-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 2 IoCs

resource	yara_rule
behavioral2/memory/5048-74-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/5048-100-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects executables packed with Dotfuscator 1 IoCs

resource	yara_rule
behavioral2/memory/2660-7-0x00000000065B0000-0x00000000067EC000-memory.dmp	INDICATOR_EXE_Packed_Dotfuscator

Downloads MZ/PE file

Loads dropped DLL 3 IoCs

pid	Process
2660	f141b5eee77d2391f8ff169914873e1219c2b47ebfde2b5bdfc0af7c6e08217b.exe
5048	MsBuild.exe
5048	MsBuild.exe

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2660 set thread context of 5048	2660	f141b5eee77d2391f8ff169914873e1219c2b47ebfde2b5bdfc0af7c6e08217b.exe	101

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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3820	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5048	MsBuild.exe
5048	MsBuild.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2660 wrote to memory of 5048	2660	f141b5eee77d2391f8ff169914873e1219c2b47ebfde2b5bdfc0af7c6e08217b.exe	101
PID 2660 wrote to memory of 5048	2660	f141b5eee77d2391f8ff169914873e1219c2b47ebfde2b5bdfc0af7c6e08217b.exe	101
PID 2660 wrote to memory of 5048	2660	f141b5eee77d2391f8ff169914873e1219c2b47ebfde2b5bdfc0af7c6e08217b.exe	101
PID 2660 wrote to memory of 5048	2660	f141b5eee77d2391f8ff169914873e1219c2b47ebfde2b5bdfc0af7c6e08217b.exe	101
PID 2660 wrote to memory of 5048	2660	f141b5eee77d2391f8ff169914873e1219c2b47ebfde2b5bdfc0af7c6e08217b.exe	101
PID 2660 wrote to memory of 5048	2660	f141b5eee77d2391f8ff169914873e1219c2b47ebfde2b5bdfc0af7c6e08217b.exe	101
PID 2660 wrote to memory of 5048	2660	f141b5eee77d2391f8ff169914873e1219c2b47ebfde2b5bdfc0af7c6e08217b.exe	101
PID 2660 wrote to memory of 5048	2660	f141b5eee77d2391f8ff169914873e1219c2b47ebfde2b5bdfc0af7c6e08217b.exe	101
PID 2660 wrote to memory of 5048	2660	f141b5eee77d2391f8ff169914873e1219c2b47ebfde2b5bdfc0af7c6e08217b.exe	101
PID 5048 wrote to memory of 4732	5048	MsBuild.exe	109
PID 5048 wrote to memory of 4732	5048	MsBuild.exe	109
PID 5048 wrote to memory of 4732	5048	MsBuild.exe	109
PID 4732 wrote to memory of 3820	4732	cmd.exe	111
PID 4732 wrote to memory of 3820	4732	cmd.exe	111
PID 4732 wrote to memory of 3820	4732	cmd.exe	111

C:\Users\Admin\AppData\Local\Temp\f141b5eee77d2391f8ff169914873e1219c2b47ebfde2b5bdfc0af7c6e08217b.exe
"C:\Users\Admin\AppData\Local\Temp\f141b5eee77d2391f8ff169914873e1219c2b47ebfde2b5bdfc0af7c6e08217b.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2660
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MsBuild.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\MsBuild.exe
  2⤵
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:5048
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MsBuild.exe" & del "C:\ProgramData\*.dll"" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4732
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 5
      4⤵
      Delays execution with timeout.exe
      PID:3820

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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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\Protect544cd51a.dll

Filesize
742KB

MD5
544cd51a596619b78e9b54b70088307d

SHA1
4769ddd2dbc1dc44b758964ed0bd231b85880b65

SHA256
dfce2d4d06de6452998b3c5b2dc33eaa6db2bd37810d04e3d02dc931887cfddd

SHA512
f56d8b81022bb132d40aa78596da39b5c212d13b84b5c7d2c576bbf403924f1d22e750de3b09d1be30aea359f1b72c5043b19685fc9bf06d8040bfee16b17719

Download Submit
memory/2660-18-0x0000000005E70000-0x0000000005E80000-memory.dmp

Filesize
64KB

Download
memory/2660-20-0x0000000005870000-0x0000000005880000-memory.dmp

Filesize
64KB

Download
memory/2660-5-0x0000000074D00000-0x00000000754B0000-memory.dmp

Filesize
7.7MB

Download
memory/2660-6-0x0000000005870000-0x0000000005880000-memory.dmp

Filesize
64KB

Download
memory/2660-7-0x00000000065B0000-0x00000000067EC000-memory.dmp

Filesize
2.2MB

Download
memory/2660-8-0x0000000005DD0000-0x0000000005DE2000-memory.dmp

Filesize
72KB

Download
memory/2660-9-0x0000000007930000-0x0000000007AC2000-memory.dmp

Filesize
1.6MB

Download
memory/2660-3-0x0000000005870000-0x0000000005880000-memory.dmp

Filesize
64KB

Download
memory/2660-15-0x0000000005870000-0x0000000005880000-memory.dmp

Filesize
64KB

Download
memory/2660-16-0x0000000005870000-0x0000000005880000-memory.dmp

Filesize
64KB

Download
memory/2660-17-0x0000000005870000-0x0000000005880000-memory.dmp

Filesize
64KB

Download
memory/2660-0-0x0000000074D00000-0x00000000754B0000-memory.dmp

Filesize
7.7MB

Download
memory/2660-19-0x0000000007E20000-0x0000000007F20000-memory.dmp

Filesize
1024KB

Download
memory/2660-4-0x0000000006080000-0x00000000065AC000-memory.dmp

Filesize
5.2MB

Download
memory/2660-21-0x0000000005870000-0x0000000005880000-memory.dmp

Filesize
64KB

Download
memory/2660-22-0x0000000007E20000-0x0000000007F20000-memory.dmp

Filesize
1024KB

Download
memory/2660-1-0x0000000000970000-0x0000000000EC4000-memory.dmp

Filesize
5.3MB

Download
memory/2660-26-0x0000000074D00000-0x00000000754B0000-memory.dmp

Filesize
7.7MB

Download
memory/2660-2-0x0000000005970000-0x0000000005A0C000-memory.dmp

Filesize
624KB

Download
memory/5048-28-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/5048-29-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/5048-74-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/5048-27-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/5048-23-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/5048-100-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download

Analysis

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