stealc | e19e97a334ecb39058fd976080222a46cc2159e34c85df371a9eaf0088ee80eb

Analysis

max time kernel
138s
max time network
130s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 10:23

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

1c09c6faad1ede18216df88b9d359543df5caacf810175b5e245e3e775b6b9a0.exe
Size

355KB
MD5

cdfa7c2a908819279534467811670643
SHA1

11ff7ed5218c9eeec2f073aeabd553b193fda606
SHA256

1c09c6faad1ede18216df88b9d359543df5caacf810175b5e245e3e775b6b9a0
SHA512

3a9c72ee86ba39c90dba7309b11b1ac600eb48ef500373e5ac4251f1d662db68d87a02283f916a5f3598c4d1e73a8cfa49b52b3dbbe1219dc51f9a127f437ea0
SSDEEP

6144:ZSuze0A9T1ApHSIZplkkWvWUfKQCqD2I2vrkIA0EPka6IjYbPD6up:ZTze0A95kkfxfR1DID+Iliup

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 13 IoCs

stealer

Processes:

resource	yara_rule
behavioral4/memory/3208-1-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral4/memory/3208-5-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral4/memory/3208-7-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral4/memory/3208-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral4/memory/3208-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral4/memory/3208-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral4/memory/3208-35-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral4/memory/3208-44-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral4/memory/3208-51-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral4/memory/3208-59-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral4/memory/3208-60-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral4/memory/3208-74-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral4/memory/3208-75-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
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

Processes:

RegAsm.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation 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 local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

1c09c6faad1ede18216df88b9d359543df5caacf810175b5e245e3e775b6b9a0.exe

description	pid	process	target process
PID 4888 set thread context of 3208	4888	1c09c6faad1ede18216df88b9d359543df5caacf810175b5e245e3e775b6b9a0.exe	RegAsm.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.

Query Registry
T1012

System Information Discovery
T1082

Processes:

RegAsm.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString RegAsm.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4904 timeout.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	RegAsm.exe

pid	process
4904	timeout.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

Processes:

RegAsm.exe

pid	process
3208	RegAsm.exe
3208	RegAsm.exe
3208	RegAsm.exe
3208	RegAsm.exe
3208	RegAsm.exe
3208	RegAsm.exe
3208	RegAsm.exe
3208	RegAsm.exe
3208	RegAsm.exe
3208	RegAsm.exe
3208	RegAsm.exe
3208	RegAsm.exe
3208	RegAsm.exe
3208	RegAsm.exe
3208	RegAsm.exe
3208	RegAsm.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

1c09c6faad1ede18216df88b9d359543df5caacf810175b5e245e3e775b6b9a0.exeRegAsm.execmd.exe

description	pid	process	target process
PID 4888 wrote to memory of 3208	4888	1c09c6faad1ede18216df88b9d359543df5caacf810175b5e245e3e775b6b9a0.exe	RegAsm.exe
PID 4888 wrote to memory of 3208	4888	1c09c6faad1ede18216df88b9d359543df5caacf810175b5e245e3e775b6b9a0.exe	RegAsm.exe
PID 4888 wrote to memory of 3208	4888	1c09c6faad1ede18216df88b9d359543df5caacf810175b5e245e3e775b6b9a0.exe	RegAsm.exe
PID 4888 wrote to memory of 3208	4888	1c09c6faad1ede18216df88b9d359543df5caacf810175b5e245e3e775b6b9a0.exe	RegAsm.exe
PID 4888 wrote to memory of 3208	4888	1c09c6faad1ede18216df88b9d359543df5caacf810175b5e245e3e775b6b9a0.exe	RegAsm.exe
PID 4888 wrote to memory of 3208	4888	1c09c6faad1ede18216df88b9d359543df5caacf810175b5e245e3e775b6b9a0.exe	RegAsm.exe
PID 4888 wrote to memory of 3208	4888	1c09c6faad1ede18216df88b9d359543df5caacf810175b5e245e3e775b6b9a0.exe	RegAsm.exe
PID 4888 wrote to memory of 3208	4888	1c09c6faad1ede18216df88b9d359543df5caacf810175b5e245e3e775b6b9a0.exe	RegAsm.exe
PID 4888 wrote to memory of 3208	4888	1c09c6faad1ede18216df88b9d359543df5caacf810175b5e245e3e775b6b9a0.exe	RegAsm.exe
PID 3208 wrote to memory of 1800	3208	RegAsm.exe	cmd.exe
PID 3208 wrote to memory of 1800	3208	RegAsm.exe	cmd.exe
PID 3208 wrote to memory of 1800	3208	RegAsm.exe	cmd.exe
PID 1800 wrote to memory of 4904	1800	cmd.exe	timeout.exe
PID 1800 wrote to memory of 4904	1800	cmd.exe	timeout.exe
PID 1800 wrote to memory of 4904	1800	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\1c09c6faad1ede18216df88b9d359543df5caacf810175b5e245e3e775b6b9a0.exe
"C:\Users\Admin\AppData\Local\Temp\1c09c6faad1ede18216df88b9d359543df5caacf810175b5e245e3e775b6b9a0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4888
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Checks computer location settings
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3208
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\DAKEHIJJKEGI" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1800
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:4904

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 --field-trial-handle=4624,i,1999448010053300448,1112699187621658374,262144 --variations-seed-version --mojo-platform-channel-handle=4196 /prefetch:8
1⤵
PID:964

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 --field-trial-handle=3608,i,1999448010053300448,1112699187621658374,262144 --variations-seed-version --mojo-platform-channel-handle=2552 /prefetch:3
1⤵
PID:2356

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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/3208-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3208-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3208-7-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3208-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3208-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3208-19-0x000000001B3F0000-0x000000001B64F000-memory.dmp

Filesize
2.4MB

Download
memory/3208-75-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3208-5-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3208-44-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3208-1-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3208-51-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3208-59-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3208-60-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3208-74-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4888-0-0x0000000000F70000-0x0000000000F71000-memory.dmp

Filesize
4KB

Download
memory/4888-3-0x0000000000F70000-0x0000000000F71000-memory.dmp

Filesize
4KB

Download