stealc | 8d6460c1b6956e715d116aa2f086452d4e4cbabc98b40e8998460a078161f15f

Analysis

max time kernel
145s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
20/02/2024, 03:47

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General

Target
0780e009018b7873acee0a21355848fe.exe
Size 346KB
Sample240220-eb7pdsae2w
SHA256 8d6460c1b6956e715d116aa2f086452d4e4cbabc98b40e8998460a078161f15f
MD5 0780e009018b7873acee0a21355848fe
SHA1 3a899273af94fd127c24e284eab1815a70de45a9
SHA512 fd4cf56150ecb30ff075aa99a5683b18aef6d04aa7a27ac5098533020a7a807b6b89ebd010079c0fe8b0072932a5239ed3e180586068323db6a2671467feb5eb
SSDEEP 6144:ZaEeh0xTczoVZDHVQGRQfusfU4H7qhWfAimfjp:9PnVFHzC77beLd
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

http://185.172.128.79

Attributes

url_path
/3cd2b41cbde8fc9c.php

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	0780e009018b7873acee0a21355848fe.exe

Executes dropped EXE 2 IoCs

pid	Process
2292	u3ns.0.exe
2108	u3ns.1.exe

Loads dropped DLL 2 IoCs

pid	Process
2292	u3ns.0.exe
2292	u3ns.0.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 2 IoCs

pid	pid_target	Process	procid_target
3772	4744	WerFault.exe	17
3148	2292	WerFault.exe	85

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	u3ns.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3ns.0.exe

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
4392	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2292	u3ns.0.exe
2292	u3ns.0.exe
2292	u3ns.0.exe
2292	u3ns.0.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2108	u3ns.1.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4744 wrote to memory of 2292	4744	0780e009018b7873acee0a21355848fe.exe	85
PID 4744 wrote to memory of 2292	4744	0780e009018b7873acee0a21355848fe.exe	85
PID 4744 wrote to memory of 2292	4744	0780e009018b7873acee0a21355848fe.exe	85
PID 4744 wrote to memory of 2108	4744	0780e009018b7873acee0a21355848fe.exe	86
PID 4744 wrote to memory of 2108	4744	0780e009018b7873acee0a21355848fe.exe	86
PID 4744 wrote to memory of 2108	4744	0780e009018b7873acee0a21355848fe.exe	86
PID 2108 wrote to memory of 996	2108	u3ns.1.exe	92
PID 2108 wrote to memory of 996	2108	u3ns.1.exe	92
PID 2108 wrote to memory of 996	2108	u3ns.1.exe	92
PID 996 wrote to memory of 4720	996	cmd.exe	94
PID 996 wrote to memory of 4720	996	cmd.exe	94
PID 996 wrote to memory of 4720	996	cmd.exe	94
PID 996 wrote to memory of 4392	996	cmd.exe	95
PID 996 wrote to memory of 4392	996	cmd.exe	95
PID 996 wrote to memory of 4392	996	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\0780e009018b7873acee0a21355848fe.exe
"C:\Users\Admin\AppData\Local\Temp\0780e009018b7873acee0a21355848fe.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4744
- C:\Users\Admin\AppData\Local\Temp\u3ns.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3ns.0.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2292
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2292 -s 2368
    3⤵
    - Program crash
    PID:3148
- C:\Users\Admin\AppData\Local\Temp\u3ns.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3ns.1.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2108
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:996
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:4720
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /tn "MalayamaraUpdate" /tr "'C:\Users\Admin\AppData\Local\Temp\Updater.exe'" /sc minute /mo 30 /F
      4⤵
      Creates scheduled task(s)
      PID:4392
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4744 -s 684
  2⤵
  - Program crash
  PID:3772

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4744 -ip 4744
1⤵
PID:1512

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2292 -ip 2292
1⤵
PID:4736

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

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

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Downloads

Are.docx

Path C:\ProgramData\Are.docx
Size 11KB
SHA256 5abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454
MD5 a33e5b189842c5867f46566bdbf7a095
SHA1 e1c06359f6a76da90d19e8fd95e79c832edb3196
SHA512 f2ad3812ec9b915e9618539b0f103f2e9acaad25fbbacd84941c954ce070af231324e83a4621e951c1dbae8d40d50410954e40dd52bbd46e34c54b0d1957407b
SSDEEP 192:CtNCEE33S7Ok0CMSYbcBVk6tqM16iPBkeawLWdxd7o3Lp:aNwC78uYbcBv6akwLWdxdE3Lp
MD5 SHA1 SHA512 SSDEEP

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mozglue.dll

Path C:\ProgramData\mozglue.dll
Size 593KB
SHA256 ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
MD5 c8fd9be83bc728cc04beffafc2907fe9
SHA1 95ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA512 fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
SSDEEP 12288:BlSyAom/gcRKMdRm4wFkRHuyG4RRGJVDjMk/x21R8gY/r:BKgcRKMdRm4wFkVVDGJVv//x21R8br
MD5 SHA1 SHA512 SSDEEP

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nss3.dll

Path C:\ProgramData\nss3.dll
Size 968KB
SHA256 09b4b352f3d9d208953f99d16244e5d43a7aa3c5ed55b5a873a80679f200b223
MD5 0b21fed2bede6c1f5f157cd772a8fa36
SHA1 5a2c0ae6b6f077cfbe622532e9eae3f681563395
SHA512 4c0f71b5f97bf0eb96c98cea7e48718379cf7ac9f643323f7e386ca81fd9721225dd1652419de1100449af21f934e383bcd37da30bec3324ca7169b41dae64dc
SSDEEP 24576:fEggtwf12gyTkHlnKGxJHxIB+y5GNIvxnnt7rczxISEYak3HFOsWYrVvE4C5mxV9:fECf12gikHlnKGxJRIB+y5nvxnaOSJ3t
MD5 SHA1 SHA512 SSDEEP

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u3ns.0.exe

Path C:\Users\Admin\AppData\Local\Temp\u3ns.0.exe
Size 228KB
SHA256 6eca8b24dd0d2804116757151bcc85f3ef3eebb0e4d4da4f974192e78cd0c773
MD5 e43227e4cad3830b355f94b5c612c619
SHA1 8b7e1bcd5f3d6c53eb813437ae54b81a4352aab9
SHA512 ffe143d93624fb4745035cf4acff088847c42f22e091cbdd6a5be4295e685fe0f87d518780bf8de2ceaad484b345df55125f1fa56b486a9c109fc8d16ec7030c
SSDEEP 3072:Lz21S3rE91+MmJfI6N6i3qT1P0JGfwOcWX4d1sK99UJMT9iK0M5IJeu:hK+MmRNgi6TBwG47Zr7ZxmE
MD5 SHA1 SHA512 SSDEEP

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u3ns.1.exe

Path C:\Users\Admin\AppData\Local\Temp\u3ns.1.exe
Size 4.7MB
SHA256 50a46b3120da828502ef0caba15defbad004a3adb88e6eacf1f9604572e2d503
MD5 5e94f0f6265f9e8b2f706f1d46bbd39e
SHA1 d0189cba430f5eea07efe1ab4f89adf5ae2453db
SHA512 473dfa66a36feed9b29a43245074141478327ce22ba7cce512599379dcb783b4d665e2d65c5e9750b988c7ed8f6c3349a7a12d4b8b57c89840eee6ca6e1a30cd
SSDEEP 49152:90oSiZ63YBmS9+rCgpvH8la0ZxRh+caGnj8HEQUhexTUT+1d/2/Tbt:0Ula0cGwXUheabt
MD5 SHA1 SHA512 SSDEEP

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Task.bat

Path C:\Users\Admin\AppData\Roaming\Temp\Task.bat
Size 128B
SHA256 6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331
MD5 11bb3db51f701d4e42d3287f71a6a43e
SHA1 63a4ee82223be6a62d04bdfe40ef8ba91ae49a86
SHA512 907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2
MD5 SHA1 SHA512

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memory/2108-27-0x0000000002570000-0x0000000002571000-memory.dmp

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memory/2108-112-0x0000000002570000-0x0000000002571000-memory.dmp

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memory/2108-110-0x0000000000400000-0x00000000008E2000-memory.dmp

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memory/2292-15-0x0000000000400000-0x0000000000647000-memory.dmp

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memory/2292-26-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/2292-13-0x0000000000720000-0x0000000000820000-memory.dmp

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memory/2292-14-0x00000000022D0000-0x0000000002304000-memory.dmp

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memory/2292-108-0x0000000000400000-0x0000000000647000-memory.dmp

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memory/2292-109-0x0000000000400000-0x0000000000647000-memory.dmp

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memory/4744-60-0x0000000000400000-0x0000000000469000-memory.dmp

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memory/4744-61-0x00000000021E0000-0x0000000002247000-memory.dmp

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memory/4744-1-0x0000000000530000-0x0000000000630000-memory.dmp

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memory/4744-2-0x00000000021E0000-0x0000000002247000-memory.dmp

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memory/4744-3-0x0000000000400000-0x0000000000469000-memory.dmp

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