stealc | 9e7b0a827b302d9f15eb1e1303fae16788fdd9ca72236b6d1d297dbfc14cb73d

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
15-03-2024 04:24

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General

Target

$TEMP/InstallSetup_two.exe
Size

388KB
MD5

21e039c9526d9af270a51b1145ee3c5c
SHA1

92411cfe14cf7717eae50b5420f25176ed03eb53
SHA256

5a62584d8b61c9e23281990a954f497b238dc12509e81bf8de1b1b9bf10141fc
SHA512

23b181e33c781b35bd1d2e3b0eeac844006db480f4a131fd2e2f3122542f488251e753e66e377bb6beaa3624a825c910e76c54a2337e05bb538202a5546ced02
SSDEEP

6144:Pmnh/qNdaHXG8q5sNIsIvOJ2xLV3mkcsbXZ8F/30rUogOUViu5:Kh/edaH2z5FOQtVxc4J8F/37O+5

Score

10^/10

stealc discovery persistence spyware stealer upx

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

Checks computer location settings 2 TTPs 3 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-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	u2f4.0.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	AAAAKJKJEB.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	InstallSetup_two.exe

Executes dropped EXE 3 IoCs

pid	Process
1404	u2f4.0.exe
1032	u2f4.1.exe
3140	AAAAKJKJEB.exe

Loads dropped DLL 2 IoCs

pid	Process
1404	u2f4.0.exe
1404	u2f4.0.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

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral4/files/0x000900000002322b-19.dat	upx
behavioral4/memory/1032-25-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral4/memory/1032-87-0x0000000000400000-0x0000000000930000-memory.dmp	upx

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2727153400-192325109-1870347593-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Ledger-Live Updater = "C:\\Users\\Admin\\AppData\\Local\\Temp\\AAAAKJKJEB.exe"	AAAAKJKJEB.exe

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
3676	3136	WerFault.exe	86

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	u2f4.0.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	u2f4.0.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
3668	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3684	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1404	u2f4.0.exe
1404	u2f4.0.exe
1404	u2f4.0.exe
1404	u2f4.0.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe
3140	AAAAKJKJEB.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3140	AAAAKJKJEB.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1032	u2f4.1.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 3136 wrote to memory of 1404	3136	InstallSetup_two.exe	96
PID 3136 wrote to memory of 1404	3136	InstallSetup_two.exe	96
PID 3136 wrote to memory of 1404	3136	InstallSetup_two.exe	96
PID 3136 wrote to memory of 1032	3136	InstallSetup_two.exe	99
PID 3136 wrote to memory of 1032	3136	InstallSetup_two.exe	99
PID 3136 wrote to memory of 1032	3136	InstallSetup_two.exe	99
PID 1032 wrote to memory of 1460	1032	u2f4.1.exe	104
PID 1032 wrote to memory of 1460	1032	u2f4.1.exe	104
PID 1032 wrote to memory of 1460	1032	u2f4.1.exe	104
PID 1460 wrote to memory of 2956	1460	cmd.exe	106
PID 1460 wrote to memory of 2956	1460	cmd.exe	106
PID 1460 wrote to memory of 2956	1460	cmd.exe	106
PID 1460 wrote to memory of 3668	1460	cmd.exe	107
PID 1460 wrote to memory of 3668	1460	cmd.exe	107
PID 1460 wrote to memory of 3668	1460	cmd.exe	107
PID 1404 wrote to memory of 3752	1404	u2f4.0.exe	109
PID 1404 wrote to memory of 3752	1404	u2f4.0.exe	109
PID 1404 wrote to memory of 3752	1404	u2f4.0.exe	109
PID 3752 wrote to memory of 3140	3752	cmd.exe	111
PID 3752 wrote to memory of 3140	3752	cmd.exe	111
PID 3752 wrote to memory of 3140	3752	cmd.exe	111
PID 3140 wrote to memory of 1620	3140	AAAAKJKJEB.exe	112
PID 3140 wrote to memory of 1620	3140	AAAAKJKJEB.exe	112
PID 3140 wrote to memory of 1620	3140	AAAAKJKJEB.exe	112
PID 1620 wrote to memory of 3684	1620	cmd.exe	114
PID 1620 wrote to memory of 3684	1620	cmd.exe	114
PID 1620 wrote to memory of 3684	1620	cmd.exe	114

C:\Users\Admin\AppData\Local\Temp\$TEMP\InstallSetup_two.exe
"C:\Users\Admin\AppData\Local\Temp\$TEMP\InstallSetup_two.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3136
- C:\Users\Admin\AppData\Local\Temp\u2f4.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u2f4.0.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1404
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\AAAAKJKJEB.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3752
  - - C:\Users\Admin\AppData\Local\Temp\AAAAKJKJEB.exe
      "C:\Users\Admin\AppData\Local\Temp\AAAAKJKJEB.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Adds Run key to start application
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:3140
    - - C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C ping 2.2.2.2 -n 1 -w 3000 > Nul & Del C:\Users\Admin\AppData\Local\Temp\AAAAKJKJEB.exe
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1620
      - C:\Windows\SysWOW64\PING.EXE
        
        ping 2.2.2.2 -n 1 -w 3000
        6⤵
        Runs ping.exe
        
        PID:3684
- C:\Users\Admin\AppData\Local\Temp\u2f4.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u2f4.1.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1032
- - 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:1460
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:2956
  - - 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:3668
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3136 -s 1512
  2⤵
  - Program crash
  PID:3676

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3136 -ip 3136
1⤵
PID:3020

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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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
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
C:\ProgramData\nss3.dll

Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

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

Filesize
101KB

MD5
42b838cf8bdf67400525e128d917f6e0

SHA1
a578f6faec738912dba8c41e7abe1502c46d0cae

SHA256
0e4ffba62ce9a464aa1b7ff9f1e55ace8f51ff1e15102d856f801a81f8b4607d

SHA512
f64b39d885375251ab7db72c57dc5b5095f0c6412169f1035d1f6a25b8415a2a01004d06bfa0267cf683ef7dea7a9f969ad43fde5a4376f1fcb65a57403433c0

Download Submit
C:\Users\Admin\AppData\Local\Temp\u2f4.0.exe

Filesize
237KB

MD5
2dca1d0c0e9f892a717ed02f6e90211a

SHA1
5857f867c5fb4bedc25794c1f960b3c03dfabccf

SHA256
b589fe21a9c02115d64fa8adab169804c69532eb2476132135a568afd179cefb

SHA512
2f84804935e96ba3ced308deaa1c5c8b991b4ab70551b192fbedee36b629b12780d338f84e2ed95e427eb4b93c6def9aa82d15f1d97add3fa8366b620463bd5d

Download Submit
C:\Users\Admin\AppData\Local\Temp\u2f4.1.exe

Filesize
1.7MB

MD5
eee5ddcffbed16222cac0a1b4e2e466e

SHA1
28b40c88b8ea50b0782e2bcbb4cc0f411035f3d5

SHA256
2a40e5dccc7526c4982334941c90f95374460e2a816e84e724e98c4d52ae8c54

SHA512
8f88901f3ebd425818db09f268df19ccf8a755603f04e9481bcf02b112a84393f8a900ead77f8f971bfa33fd9fa5636b7494aaee864a0fb04e3273911a4216dc

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

Filesize
128B

MD5
11bb3db51f701d4e42d3287f71a6a43e

SHA1
63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

SHA256
6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

SHA512
907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

Download Submit
memory/1032-27-0x0000000000E70000-0x0000000000E71000-memory.dmp

Filesize
4KB

Download
memory/1032-130-0x0000000000E70000-0x0000000000E71000-memory.dmp

Filesize
4KB

Download
memory/1032-87-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/1032-25-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/1404-120-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1404-35-0x0000000000870000-0x0000000000970000-memory.dmp

Filesize
1024KB

Download
memory/1404-36-0x0000000002240000-0x0000000002267000-memory.dmp

Filesize
156KB

Download
memory/1404-37-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1404-38-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/1404-86-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1404-123-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/3136-3-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3136-30-0x00000000020C0000-0x0000000002127000-memory.dmp

Filesize
412KB

Download
memory/3136-28-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3136-2-0x00000000020C0000-0x0000000002127000-memory.dmp

Filesize
412KB

Download
memory/3136-1-0x00000000005A0000-0x00000000006A0000-memory.dmp

Filesize
1024KB

Download
memory/3140-128-0x00000000005E0000-0x00000000005FE000-memory.dmp

Filesize
120KB

Download
memory/3140-129-0x0000000072830000-0x0000000072FE0000-memory.dmp

Filesize
7.7MB

Download
memory/3140-131-0x00000000051B0000-0x00000000051C0000-memory.dmp

Filesize
64KB

Download
memory/3140-135-0x0000000072830000-0x0000000072FE0000-memory.dmp

Filesize
7.7MB

Download
memory/3140-136-0x00000000051B0000-0x00000000051C0000-memory.dmp

Filesize
64KB

Download