stealc | b9f0d560b1dbc7c3b7066bb398c4e280878c07c41523f75385cf841d90c6b36a

General

Target

$TEMP/syncUpd.exe
Size

200KB
MD5

94bbc397cb882051d1e8b213a06c8200
SHA1

05e330dd31360ef34a90f96d385a28c0ae246faf
SHA256

6d2fedb6293fe0035eb0ce4380cbf993865d3fff561add74861516ae977519c5
SHA512

8151836eb9f3605af9e3569ffaa13b749d8d2522181e1864b072e59196ba95f3aaa79bc6aba75eb080ebd9c587aac5f2d9057825b29ff96ab052a1164cab6f45
SSDEEP

3072:lY0uzo/Zu0Pdchw5isIHTsfXBOGElt5HZXEc4GDZ1:+0t/ZcFd0XBODR53D

Score

10^/10

stealc discovery spyware stealer

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

Detect binaries embedding considerable number of MFA browser extension IDs. 6 IoCs

resource	yara_rule
behavioral8/memory/4584-4-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral8/memory/4584-53-0x00000000008F0000-0x00000000009F0000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral8/memory/4584-57-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral8/memory/4584-67-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral8/memory/4584-97-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral8/memory/4584-98-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs

Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 6 IoCs

resource	yara_rule
behavioral8/memory/4584-4-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral8/memory/4584-53-0x00000000008F0000-0x00000000009F0000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral8/memory/4584-57-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral8/memory/4584-67-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral8/memory/4584-97-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral8/memory/4584-98-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 5 IoCs

resource	yara_rule
behavioral8/memory/4584-4-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral8/memory/4584-57-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral8/memory/4584-67-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral8/memory/4584-97-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral8/memory/4584-98-0x0000000000400000-0x000000000063B000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
4584	syncUpd.exe
4584	syncUpd.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
4868	4584	WerFault.exe	94

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

Suspicious behavior: EnumeratesProcesses 34 IoCs

pid	Process
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe
4584	syncUpd.exe

C:\Users\Admin\AppData\Local\Temp\$TEMP\syncUpd.exe
"C:\Users\Admin\AppData\Local\Temp\$TEMP\syncUpd.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4584
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4584 -s 2232
  2⤵
  - Program crash
  PID:4868

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --no-appcompat-clear --mojo-platform-channel-handle=2660 --field-trial-handle=2244,i,11878111470816612087,2265290141962607370,262144 --variations-seed-version /prefetch:3
1⤵
PID:1312

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1344 --field-trial-handle=2244,i,11878111470816612087,2265290141962607370,262144 --variations-seed-version /prefetch:8
1⤵
PID:4344

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4584 -ip 4584
1⤵
PID:4996

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

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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
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\SCT Auditing Pending Reports

Filesize
2B

MD5
d751713988987e9331980363e24189ce

SHA1
97d170e1550eee4afc0af065b78cda302a97674c

SHA256
4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945

SHA512
b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\Sdch Dictionaries

Filesize
40B

MD5
20d4b8fa017a12a108c87f540836e250

SHA1
1ac617fac131262b6d3ce1f52f5907e31d5f6f00

SHA256
6028bd681dbf11a0a58dde8a0cd884115c04caa59d080ba51bde1b086ce0079d

SHA512
507b2b8a8a168ff8f2bdafa5d9d341c44501a5f17d9f63f3d43bd586bc9e8ae33221887869fa86f845b7d067cb7d2a7009efd71dda36e03a40a74fee04b86856

Download Submit
memory/4584-5-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/4584-53-0x00000000008F0000-0x00000000009F0000-memory.dmp

Filesize
1024KB

Download
memory/4584-57-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4584-61-0x0000000000790000-0x00000000007B7000-memory.dmp

Filesize
156KB

Download
memory/4584-1-0x00000000008F0000-0x00000000009F0000-memory.dmp

Filesize
1024KB

Download
memory/4584-67-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4584-4-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4584-3-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4584-2-0x0000000000790000-0x00000000007B7000-memory.dmp

Filesize
156KB

Download
memory/4584-97-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4584-98-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download

Analysis

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