stealc | d9e2872d558721de5b09602fe211b1d5f8b53dd69537b4553bf536fd08feee61

Analysis

max time kernel
149s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
22/02/2024, 15:59

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General

Target
1e626e896e2859ebd0d240dfec7939b1.exe
Size 1.8MB
Sample240222-te21msca7s
SHA256 d9e2872d558721de5b09602fe211b1d5f8b53dd69537b4553bf536fd08feee61
MD5 1e626e896e2859ebd0d240dfec7939b1
SHA1 735d93eb4c231ba0675c62ea49b88f61ea9fb3cb
SHA512 1329e4ba3551e29720d99954426cfd9b0e03e902ed5b7f94ac2eb239ef5259062f3308cec427322c1532bf7117e1b0e2f35fbb4f6b16149267d641eb237ecf74
SSDEEP 24576:sPdCquy2+Q97+0CnnNjeGXkBXwp7Ufvrz0I5j2sMfqjZk8jbHt/4X1vyZw4WULH:Uq796HIWiDP5j2sMfqe8jF+yRH
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

http://185.172.128.145

Attributes

url_path
/3cd2b41cbde8fc9c.php

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
2368	BroomSetup.exe
2116	nsi5959.tmp

Loads dropped DLL 6 IoCs

pid	Process
3344	1e626e896e2859ebd0d240dfec7939b1.exe
3344	1e626e896e2859ebd0d240dfec7939b1.exe
3344	1e626e896e2859ebd0d240dfec7939b1.exe
2116	nsi5959.tmp
2116	nsi5959.tmp
3344	1e626e896e2859ebd0d240dfec7939b1.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
2704	2116	WerFault.exe	90

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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	nsi5959.tmp
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	nsi5959.tmp

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
1788	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2116	nsi5959.tmp
2116	nsi5959.tmp
2116	nsi5959.tmp
2116	nsi5959.tmp

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2368	BroomSetup.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3344 wrote to memory of 2368	3344	1e626e896e2859ebd0d240dfec7939b1.exe	85
PID 3344 wrote to memory of 2368	3344	1e626e896e2859ebd0d240dfec7939b1.exe	85
PID 3344 wrote to memory of 2368	3344	1e626e896e2859ebd0d240dfec7939b1.exe	85
PID 2368 wrote to memory of 1140	2368	BroomSetup.exe	86
PID 2368 wrote to memory of 1140	2368	BroomSetup.exe	86
PID 2368 wrote to memory of 1140	2368	BroomSetup.exe	86
PID 1140 wrote to memory of 3136	1140	cmd.exe	88
PID 1140 wrote to memory of 3136	1140	cmd.exe	88
PID 1140 wrote to memory of 3136	1140	cmd.exe	88
PID 1140 wrote to memory of 1788	1140	cmd.exe	89
PID 1140 wrote to memory of 1788	1140	cmd.exe	89
PID 1140 wrote to memory of 1788	1140	cmd.exe	89
PID 3344 wrote to memory of 2116	3344	1e626e896e2859ebd0d240dfec7939b1.exe	90
PID 3344 wrote to memory of 2116	3344	1e626e896e2859ebd0d240dfec7939b1.exe	90
PID 3344 wrote to memory of 2116	3344	1e626e896e2859ebd0d240dfec7939b1.exe	90

C:\Users\Admin\AppData\Local\Temp\1e626e896e2859ebd0d240dfec7939b1.exe
"C:\Users\Admin\AppData\Local\Temp\1e626e896e2859ebd0d240dfec7939b1.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3344
- C:\Users\Admin\AppData\Local\Temp\BroomSetup.exe
  C:\Users\Admin\AppData\Local\Temp\BroomSetup.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2368
- - 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:1140
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:3136
  - - 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:1788
- C:\Users\Admin\AppData\Local\Temp\nsi5959.tmp
  C:\Users\Admin\AppData\Local\Temp\nsi5959.tmp
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2116
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2116 -s 2384
    3⤵
    - Program crash
    PID:2704

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2116 -ip 2116
1⤵
PID:424

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 2.0MB
SHA256 ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
MD5 1cc453cdf74f31e4d913ff9c10acdde2
SHA1 6e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA512 dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571
SSDEEP 49152:fECf12gikHlnKGxJRIB+y5nvxnaOSJ3HFNWYrVvE4CQsgzMmQfTU1NrWmy4KoAzh:J7Tf8J1Q+SS5/nr
MD5 SHA1 SHA512 SSDEEP

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BroomSetup.exe

Path C:\Users\Admin\AppData\Local\Temp\BroomSetup.exe
Size 2.2MB
SHA256 93f9d7cb23caf0d83bccbfad9c962c6a7696b0d6f6174d9bf2449a9f59331e25
MD5 9b7389857e5d751f431c9a8c9a5a57d6
SHA1 f2d410a06389f04e505b8a0b49540a7b77e0c0dc
SHA512 7abc63f89e0101baf7a9fa62a9828af1c9c21ab6f3f9ec578e45e374840077b84171d04d5f92c772653ea9e19d968507fae13be9f462111a10f6ceb7c4a018e0
SSDEEP 24576:9T8Eb3E5kMG9S1UDWmAdd81rpEti0Bhboss/IBhAbGHNhRXOqVH5aHBBoS9+DPB2:90oSiZ63YBmS9+rCgpI
MD5 SHA1 SHA512 SSDEEP

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INetC.dll

Path C:\Users\Admin\AppData\Local\Temp\nsh494B.tmp\INetC.dll
Size 25KB
SHA256 85e03805f90f72257dd41bfdaa186237218bbb0ec410ad3b6576a88ea11dccb9
MD5 40d7eca32b2f4d29db98715dd45bfac5
SHA1 124df3f617f562e46095776454e1c0c7bb791cc7
SHA512 5fd4f516ce23fb7e705e150d5c1c93fc7133694ba495fb73101674a528883a013a34ab258083aa7ce6072973b067a605158316a4c9159c1b4d765761f91c513d
SSDEEP 384:pjj9e9dE95XD+iTx58Y5oMM3O9MEoLr1VcQZ/ZwcSyekMRlZ4L4:dAvE90GuY2tO93oLrJRM7Z4E
MD5 SHA1 SHA512 SSDEEP

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nsi5959.tmp

Path C:\Users\Admin\AppData\Local\Temp\nsi5959.tmp
Size 177KB
SHA256 48d29a772c63f5e2ceb367bd6ac61c7e8417d0e5d784b79f556d2a411a759431
MD5 427787658055937a82880e3e8d85d932
SHA1 d052e7c21d12efbb96b61c5e183b1650180fb1bf
SHA512 41098584164e0074b20ef518c3c13d57d29bf4e7f83e2f0e374d72d48619481c473d87c70bc745b190f59b63a7427579e5ee5a4295c5f9611b8b3eb04d7936fb
SSDEEP 3072:WvGBW2wgERJLiLZxNsicLPELYxDoKoypJrjh2xhrRBrXg0C:DJwguLiLZx+ocxHoALivDC
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/2116-39-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/2116-38-0x0000000000400000-0x0000000000821000-memory.dmp

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memory/2116-37-0x0000000000990000-0x00000000009C4000-memory.dmp

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memory/2116-36-0x00000000009E0000-0x0000000000AE0000-memory.dmp

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memory/2116-115-0x0000000000400000-0x0000000000821000-memory.dmp

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memory/2116-123-0x0000000000400000-0x0000000000821000-memory.dmp

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memory/2116-124-0x0000000000990000-0x00000000009C4000-memory.dmp

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memory/2368-81-0x0000000000400000-0x00000000008E2000-memory.dmp

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memory/2368-7-0x0000000002680000-0x0000000002681000-memory.dmp

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memory/2368-122-0x0000000002680000-0x0000000002681000-memory.dmp

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