buer | 84f2c0f4db7d4f3faf88fe9fb75829b4d480f936929591df7e5b22846dcb5777

General

Target

84f2c0f4db7d4f3faf88fe9fb75829b4d480f936929591df7e5b22846dcb5777.exe
Size

230KB
MD5

ccd572a3007d968e7fc7530b369bdcf6
SHA1

72e0464b18e45f75f194cc5ae6f7d59e2f2d8ca6
SHA256

84f2c0f4db7d4f3faf88fe9fb75829b4d480f936929591df7e5b22846dcb5777
SHA512

b977c3cabfce519c49dad3274c6927f03bec5b502d1bde6fbfc3ebe22880434c6bcb5a19f7d0987328ff71502642680b07cb89435f5a7aafb70261fd3c2b7ebc
SSDEEP

3072:1nrH0rS6R7SM6eUdRV+1p0R6JXojk9WhOmGJmDaJ6acnhC9gDJoRzzyT6yP:1nP6Ron0XolyDVkSJzOTx

Score

10^/10

buer stealc discovery loader spyware stealer

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.150

Attributes

url_path
/c698e1bc8a2f5e6d.php

Signatures

Buer
Buer is a new modular loader first seen in August 2019.
loader buer
Stealc
Stealc is an infostealer written in C++.
stealer stealc
Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
952	84f2c0f4db7d4f3faf88fe9fb75829b4d480f936929591df7e5b22846dcb5777.exe
952	84f2c0f4db7d4f3faf88fe9fb75829b4d480f936929591df7e5b22846dcb5777.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
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
2236	952	WerFault.exe	79

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	84f2c0f4db7d4f3faf88fe9fb75829b4d480f936929591df7e5b22846dcb5777.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	84f2c0f4db7d4f3faf88fe9fb75829b4d480f936929591df7e5b22846dcb5777.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
952	84f2c0f4db7d4f3faf88fe9fb75829b4d480f936929591df7e5b22846dcb5777.exe
952	84f2c0f4db7d4f3faf88fe9fb75829b4d480f936929591df7e5b22846dcb5777.exe

C:\Users\Admin\AppData\Local\Temp\84f2c0f4db7d4f3faf88fe9fb75829b4d480f936929591df7e5b22846dcb5777.exe
"C:\Users\Admin\AppData\Local\Temp\84f2c0f4db7d4f3faf88fe9fb75829b4d480f936929591df7e5b22846dcb5777.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:952
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 952 -s 2460
  2⤵
  - Program crash
  PID:2236

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 952 -ip 952
1⤵
PID:3008

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

2

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Are.docx

Filesize
11KB

MD5
a33e5b189842c5867f46566bdbf7a095

SHA1
e1c06359f6a76da90d19e8fd95e79c832edb3196

SHA256
5abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454

SHA512
f2ad3812ec9b915e9618539b0f103f2e9acaad25fbbacd84941c954ce070af231324e83a4621e951c1dbae8d40d50410954e40dd52bbd46e34c54b0d1957407b

Download Submit
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
memory/952-3-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/952-2-0x0000000004280000-0x00000000042A7000-memory.dmp

Filesize
156KB

Download
memory/952-1-0x0000000002630000-0x0000000002730000-memory.dmp

Filesize
1024KB

Download
memory/952-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/952-83-0x0000000000400000-0x0000000002575000-memory.dmp

Filesize
33.5MB

Download
memory/952-90-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/952-89-0x0000000000400000-0x0000000002575000-memory.dmp

Filesize
33.5MB

Download

Analysis

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