stealc | 1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3

General

Target

1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe
Size

2.0MB
MD5

075d3c9d5ba2a9ef2b97a8fa4bec7f71
SHA1

9e05a7fe53faa24b7e8e0f1c6c1baf6cf742d7e0
SHA256

1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3
SHA512

4a05ad1d2c467c8d925972114c5c8f47c74b289d524cfa5ae8b10c23c439efa52a91a766e2fdfbfc3036ae3b1888d0fd0373884097133c6aef942fc5c0b46a26
SSDEEP

49152:LnJ81O3KnTqVDiqC3fovHYgNA6izfKQqVIxfIS:TJ8A6TUTfjN3i3d

Score

10^/10

stealc discovery 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

Executes dropped EXE 2 IoCs

pid	Process
1544	syncUpd.exe
2908	BroomSetup.exe

Loads dropped DLL 5 IoCs

pid	Process
1960	1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe
1960	1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe
1960	1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe
1960	1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe
1960	1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0009000000015d8c-25.dat	upx
behavioral1/memory/2908-34-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral1/memory/2908-47-0x0000000000400000-0x0000000000930000-memory.dmp	upx

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
332	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1544	syncUpd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2908	BroomSetup.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1960 wrote to memory of 1544	1960	1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe	28
PID 1960 wrote to memory of 1544	1960	1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe	28
PID 1960 wrote to memory of 1544	1960	1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe	28
PID 1960 wrote to memory of 1544	1960	1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe	28
PID 1960 wrote to memory of 2908	1960	1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe	30
PID 1960 wrote to memory of 2908	1960	1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe	30
PID 1960 wrote to memory of 2908	1960	1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe	30
PID 1960 wrote to memory of 2908	1960	1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe	30
PID 1960 wrote to memory of 2908	1960	1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe	30
PID 1960 wrote to memory of 2908	1960	1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe	30
PID 1960 wrote to memory of 2908	1960	1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe	30
PID 2908 wrote to memory of 1260	2908	BroomSetup.exe	31
PID 2908 wrote to memory of 1260	2908	BroomSetup.exe	31
PID 2908 wrote to memory of 1260	2908	BroomSetup.exe	31
PID 2908 wrote to memory of 1260	2908	BroomSetup.exe	31
PID 1260 wrote to memory of 2016	1260	cmd.exe	33
PID 1260 wrote to memory of 2016	1260	cmd.exe	33
PID 1260 wrote to memory of 2016	1260	cmd.exe	33
PID 1260 wrote to memory of 2016	1260	cmd.exe	33
PID 1260 wrote to memory of 332	1260	cmd.exe	34
PID 1260 wrote to memory of 332	1260	cmd.exe	34
PID 1260 wrote to memory of 332	1260	cmd.exe	34
PID 1260 wrote to memory of 332	1260	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe
"C:\Users\Admin\AppData\Local\Temp\1c1f1e2155442c8ae725b460ee9bb37daa53b691d7c34281f9f324f2f2235fb3.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1960
- C:\Users\Admin\AppData\Local\Temp\syncUpd.exe
  C:\Users\Admin\AppData\Local\Temp\syncUpd.exe
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:1544
- 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:2908
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1260
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:2016
  - - 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:332

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

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
128B

MD5
11bb3db51f701d4e42d3287f71a6a43e

SHA1
63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

SHA256
6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

SHA512
907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

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

Filesize
1.7MB

MD5
eee5ddcffbed16222cac0a1b4e2e466e

SHA1
28b40c88b8ea50b0782e2bcbb4cc0f411035f3d5

SHA256
2a40e5dccc7526c4982334941c90f95374460e2a816e84e724e98c4d52ae8c54

SHA512
8f88901f3ebd425818db09f268df19ccf8a755603f04e9481bcf02b112a84393f8a900ead77f8f971bfa33fd9fa5636b7494aaee864a0fb04e3273911a4216dc

Download Submit
\Users\Admin\AppData\Local\Temp\nsd4175.tmp\INetC.dll

Filesize
21KB

MD5
2b342079303895c50af8040a91f30f71

SHA1
b11335e1cb8356d9c337cb89fe81d669a69de17e

SHA256
2d5d89025911e2e273f90f393624be4819641dbee1606de792362e442e54612f

SHA512
550452dadc86ecd205f40668894116790a456fe46e9985d68093d36cf32abf00edecb5c56ff0287464a0e819db7b3cc53926037a116de6c651332a7cc8035d47

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

Filesize
200KB

MD5
c722591f624fb69970f246b8c81d830f

SHA1
85516decea5d6987bebe39cbadf36053beaf4bb0

SHA256
13cd1152a19fdac6581cac2bd822f34bd3026ea1783ff231e299b6d28c046a6a

SHA512
822584c5c8a0813af4d845e80919776c71a43464ab719d1c303ebaae6a8ed47763183566bedc9be2e8c44de8ee6fd62d1e12be471e5d5c73ae4b1dcdaa34a908

Download Submit
memory/1544-18-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1544-17-0x0000000000230000-0x0000000000257000-memory.dmp

Filesize
156KB

Download
memory/1544-36-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/1544-38-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1544-16-0x0000000000770000-0x0000000000870000-memory.dmp

Filesize
1024KB

Download
memory/1544-49-0x0000000000770000-0x0000000000870000-memory.dmp

Filesize
1024KB

Download
memory/1544-50-0x0000000000230000-0x0000000000257000-memory.dmp

Filesize
156KB

Download
memory/1960-31-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/1960-33-0x0000000004EA0000-0x00000000053D0000-memory.dmp

Filesize
5.2MB

Download
memory/2908-34-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/2908-35-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/2908-47-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/2908-53-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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