stealc | cb1f3d6606ab6a841506fa1a687977c4666d66822fd2fb0f7b7602a5557cb51b

General

Target

cb1f3d6606ab6a841506fa1a687977c4666d66822fd2fb0f7b7602a5557cb51b.exe
Size

2.0MB
MD5

23f787b10ce46d6ae68ab2bbf43a355a
SHA1

2ef5ef0cd846509fafb6e2c43a230f473af260b3
SHA256

cb1f3d6606ab6a841506fa1a687977c4666d66822fd2fb0f7b7602a5557cb51b
SHA512

5f16a8ec72c53de509b895e5eb2fa8f2d1bcefa72a8794ed2eec23040b2647b4ed8905a2005c07200bc95586719d55810df2da4fc4efe65c2e6b06ed3ef3c49a
SSDEEP

49152:Lfs3IJVF1A7QIRXu0CYEewj53k/EWIQBA6nyZ:Ls3IrA71JuG+57Ei

Score

10^/10

stealc discovery spyware stealer upx

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
Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
1384	syncUpd.exe
4064	BroomSetup.exe

Loads dropped DLL 4 IoCs

pid	Process
2956	cb1f3d6606ab6a841506fa1a687977c4666d66822fd2fb0f7b7602a5557cb51b.exe
2956	cb1f3d6606ab6a841506fa1a687977c4666d66822fd2fb0f7b7602a5557cb51b.exe
1384	syncUpd.exe
1384	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

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x000b000000023104-25.dat	upx
behavioral2/memory/4064-27-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral2/memory/4064-33-0x0000000000400000-0x0000000000930000-memory.dmp	upx

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

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

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
3692	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1384	syncUpd.exe
1384	syncUpd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4064	BroomSetup.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2956 wrote to memory of 1384	2956	cb1f3d6606ab6a841506fa1a687977c4666d66822fd2fb0f7b7602a5557cb51b.exe	90
PID 2956 wrote to memory of 1384	2956	cb1f3d6606ab6a841506fa1a687977c4666d66822fd2fb0f7b7602a5557cb51b.exe	90
PID 2956 wrote to memory of 1384	2956	cb1f3d6606ab6a841506fa1a687977c4666d66822fd2fb0f7b7602a5557cb51b.exe	90
PID 2956 wrote to memory of 4064	2956	cb1f3d6606ab6a841506fa1a687977c4666d66822fd2fb0f7b7602a5557cb51b.exe	93
PID 2956 wrote to memory of 4064	2956	cb1f3d6606ab6a841506fa1a687977c4666d66822fd2fb0f7b7602a5557cb51b.exe	93
PID 2956 wrote to memory of 4064	2956	cb1f3d6606ab6a841506fa1a687977c4666d66822fd2fb0f7b7602a5557cb51b.exe	93
PID 4064 wrote to memory of 2068	4064	BroomSetup.exe	94
PID 4064 wrote to memory of 2068	4064	BroomSetup.exe	94
PID 4064 wrote to memory of 2068	4064	BroomSetup.exe	94
PID 2068 wrote to memory of 4788	2068	cmd.exe	96
PID 2068 wrote to memory of 4788	2068	cmd.exe	96
PID 2068 wrote to memory of 4788	2068	cmd.exe	96
PID 2068 wrote to memory of 3692	2068	cmd.exe	97
PID 2068 wrote to memory of 3692	2068	cmd.exe	97
PID 2068 wrote to memory of 3692	2068	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\cb1f3d6606ab6a841506fa1a687977c4666d66822fd2fb0f7b7602a5557cb51b.exe
"C:\Users\Admin\AppData\Local\Temp\cb1f3d6606ab6a841506fa1a687977c4666d66822fd2fb0f7b7602a5557cb51b.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2956
- C:\Users\Admin\AppData\Local\Temp\syncUpd.exe
  C:\Users\Admin\AppData\Local\Temp\syncUpd.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:1384
- 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:4064
- - 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:2068
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:4788
  - - 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:3692

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

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
404KB

MD5
d2120d932d5b5641b54e990fcfb2a5f3

SHA1
d13cc58646c93cd52d48ba4a539752f6c38c5132

SHA256
800509aab3ee35c851eb1f65632ea7f7bd9ac2693462b90d04cd22a9ef578d59

SHA512
be3457988ac50e347d4fc8686050cadd5e379ddcfb2419d2227159e497e1e304d8b011c98bee61dda6618ffc197f589711ca650260a4ff908ddeb0135a0ed573

Download Submit
C:\ProgramData\mozglue.dll

Filesize
479KB

MD5
0153a4e0f3bead8a68872d423d21e054

SHA1
1ccedc4c50ad320c862d1f5e53c47dfc522e1e76

SHA256
58ebb86e2a2a446d3d1df44293facb64b2018905d291d66b1fc47268ad0c4710

SHA512
b9aae9856631fbe0d84c0bd7444e4ba637ebdf783cb5d3ef957f981671740e6eb18cfe0a2c94b62163a8deb7822d45bc8357006edb88993e15e3732255b5930f

Download Submit
C:\ProgramData\nss3.dll

Filesize
433KB

MD5
0db7052df3a3ab4286ef30bcfec81631

SHA1
dae4a939e847d02ac749e6a49a1cefdbdbcc6aaf

SHA256
1e91017a89977a9bdd9187fa40f9bb5b2c2fcda5e57b7daeb7904d1a9d9cdc8b

SHA512
d07ef08974459bb9f7ad78e4f69bdb936968951143f356ed361a65e6af7d50b74f852b09dba4789e9186c2f4a52e9283a1d39cbf1d69185b2cc8f787fcfab45d

Download Submit
C:\Users\Admin\AppData\Local\Temp\BroomSetup.exe

Filesize
1.7MB

MD5
eee5ddcffbed16222cac0a1b4e2e466e

SHA1
28b40c88b8ea50b0782e2bcbb4cc0f411035f3d5

SHA256
2a40e5dccc7526c4982334941c90f95374460e2a816e84e724e98c4d52ae8c54

SHA512
8f88901f3ebd425818db09f268df19ccf8a755603f04e9481bcf02b112a84393f8a900ead77f8f971bfa33fd9fa5636b7494aaee864a0fb04e3273911a4216dc

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsc4CCA.tmp\INetC.dll

Filesize
21KB

MD5
2b342079303895c50af8040a91f30f71

SHA1
b11335e1cb8356d9c337cb89fe81d669a69de17e

SHA256
2d5d89025911e2e273f90f393624be4819641dbee1606de792362e442e54612f

SHA512
550452dadc86ecd205f40668894116790a456fe46e9985d68093d36cf32abf00edecb5c56ff0287464a0e819db7b3cc53926037a116de6c651332a7cc8035d47

Download Submit
C:\Users\Admin\AppData\Local\Temp\syncUpd.exe

Filesize
200KB

MD5
c722591f624fb69970f246b8c81d830f

SHA1
85516decea5d6987bebe39cbadf36053beaf4bb0

SHA256
13cd1152a19fdac6581cac2bd822f34bd3026ea1783ff231e299b6d28c046a6a

SHA512
822584c5c8a0813af4d845e80919776c71a43464ab719d1c303ebaae6a8ed47763183566bedc9be2e8c44de8ee6fd62d1e12be471e5d5c73ae4b1dcdaa34a908

Download Submit
C:\Users\Admin\AppData\Roaming\Temp\Task.bat

Filesize
128B

MD5
11bb3db51f701d4e42d3287f71a6a43e

SHA1
63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

SHA256
6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

SHA512
907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

Download Submit
memory/1384-93-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1384-85-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1384-32-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1384-17-0x0000000000930000-0x0000000000A30000-memory.dmp

Filesize
1024KB

Download
memory/1384-34-0x0000000000930000-0x0000000000A30000-memory.dmp

Filesize
1024KB

Download
memory/1384-35-0x00000000007C0000-0x00000000007E7000-memory.dmp

Filesize
156KB

Download
memory/1384-36-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1384-137-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1384-43-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/1384-121-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1384-18-0x00000000007C0000-0x00000000007E7000-memory.dmp

Filesize
156KB

Download
memory/1384-99-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1384-19-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/2956-26-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/4064-27-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/4064-28-0x0000000001010000-0x0000000001011000-memory.dmp

Filesize
4KB

Download
memory/4064-38-0x0000000001010000-0x0000000001011000-memory.dmp

Filesize
4KB

Download
memory/4064-33-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads