stealc | 21788fbbbffd232929cdf4ad6304ec6b1ceb966b058561520af761ab11431d19

General

Target

31c6a028ab500d3b8c6d53c5827ffdd773146a55306f3196271dce2f548aa020.exe
Size

414KB
MD5

32da82af183c6de4e3874d5760b65168
SHA1

7be8f0dc1bfc8f172b407a366f19aec9d30684c4
SHA256

31c6a028ab500d3b8c6d53c5827ffdd773146a55306f3196271dce2f548aa020
SHA512

03927e0a5eaf71b0469a41ede18b8a6eae2ed569da6e67c3dac33d7d78b3c1262ef2729da39cfd0c8856cc1e25cad9bb2c7f3a0b1c1690a79f20dee8384cf147
SSDEEP

6144:kUBes6jA+uS+YRiXbr41hssVhBM+gOmHs0EE2ovTCsqXd3zCEKV:1j6U+ulYRYv4zx4pMBAvTmFKV

Score

10^/10

stealc discovery spyware stealer upx

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.209

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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	31c6a028ab500d3b8c6d53c5827ffdd773146a55306f3196271dce2f548aa020.exe

Executes dropped EXE 2 IoCs

pid	Process
5100	u1ms.0.exe
3128	u1ms.1.exe

Loads dropped DLL 2 IoCs

pid	Process
5100	u1ms.0.exe
5100	u1ms.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
behavioral2/files/0x00080000000231e3-20.dat	upx
behavioral2/memory/3128-27-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral2/memory/3128-74-0x0000000000400000-0x0000000000930000-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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4136	2116	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 opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	u1ms.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u1ms.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
4868	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5100	u1ms.0.exe
5100	u1ms.0.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3128	u1ms.1.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2116 wrote to memory of 5100	2116	31c6a028ab500d3b8c6d53c5827ffdd773146a55306f3196271dce2f548aa020.exe	91
PID 2116 wrote to memory of 5100	2116	31c6a028ab500d3b8c6d53c5827ffdd773146a55306f3196271dce2f548aa020.exe	91
PID 2116 wrote to memory of 5100	2116	31c6a028ab500d3b8c6d53c5827ffdd773146a55306f3196271dce2f548aa020.exe	91
PID 2116 wrote to memory of 3128	2116	31c6a028ab500d3b8c6d53c5827ffdd773146a55306f3196271dce2f548aa020.exe	95
PID 2116 wrote to memory of 3128	2116	31c6a028ab500d3b8c6d53c5827ffdd773146a55306f3196271dce2f548aa020.exe	95
PID 2116 wrote to memory of 3128	2116	31c6a028ab500d3b8c6d53c5827ffdd773146a55306f3196271dce2f548aa020.exe	95
PID 3128 wrote to memory of 2436	3128	u1ms.1.exe	101
PID 3128 wrote to memory of 2436	3128	u1ms.1.exe	101
PID 3128 wrote to memory of 2436	3128	u1ms.1.exe	101
PID 2436 wrote to memory of 1208	2436	cmd.exe	103
PID 2436 wrote to memory of 1208	2436	cmd.exe	103
PID 2436 wrote to memory of 1208	2436	cmd.exe	103
PID 2436 wrote to memory of 4868	2436	cmd.exe	105
PID 2436 wrote to memory of 4868	2436	cmd.exe	105
PID 2436 wrote to memory of 4868	2436	cmd.exe	105

C:\Users\Admin\AppData\Local\Temp\31c6a028ab500d3b8c6d53c5827ffdd773146a55306f3196271dce2f548aa020.exe
"C:\Users\Admin\AppData\Local\Temp\31c6a028ab500d3b8c6d53c5827ffdd773146a55306f3196271dce2f548aa020.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2116
- C:\Users\Admin\AppData\Local\Temp\u1ms.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u1ms.0.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:5100
- C:\Users\Admin\AppData\Local\Temp\u1ms.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u1ms.1.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3128
- - 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:2436
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:1208
  - - 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:4868
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2116 -s 1188
  2⤵
  - Program crash
  PID:4136

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 2116 -ip 2116
1⤵
PID:3276

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

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\mozglue.dll

Filesize
128KB

MD5
a47c9a22d04f7a89ffb338ec0d9163f2

SHA1
c779b4e0bd380889d053a5a2e64fac7e5c9f0d85

SHA256
c67b8f01d1b007cf0abea4f89d1272a146116b398d97c0873889e4f3bc1aa2a5

SHA512
64ebbee2f2f0884096e5b0996b30adae289549ba24f19fb3858f638148f358cd9a6f2fb370c0b2a44e821cb00b5a49468f849c97e9aa8ee413bbae11b57d72f4

Download Submit
C:\ProgramData\mozglue.dll

Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
C:\ProgramData\nss3.dll

Filesize
256KB

MD5
8f2318356b5eb6ba97f7a117f1a4562f

SHA1
be2464cb96b2b83341c9d9fef7393593a0fa6ec5

SHA256
28a5a93b18df96fc42f56176e1363f187e75580a5f197b681c4f71f5e92b10ed

SHA512
a0015f0e1d12d073c98090a9b3d678ad9d8f04872475cf32ed84b163022206391b295c1bb16ff7e85d5bfaae330a19a797dc0aede5bbb2c18185aca65bd721a9

Download Submit
C:\Users\Admin\AppData\Local\Temp\u1ms.0.exe

Filesize
310KB

MD5
e0a5b9bdadb0ba852cc3efd6b6e0cc38

SHA1
8ef0464a27a686ca76bfb907caf04163f65f68fe

SHA256
d14d6b781211f0e119132259d31da661841e91e12137bf021595ee2e3ced3ea1

SHA512
a3319dbeaabcae345984c03d3a8f7bde513519bbb9eab22f85b4ff12a0d2c34ac0655ad4b6284f72735113514e3e19213313afea96a23772ece9aab75f2960e4

Download Submit
C:\Users\Admin\AppData\Local\Temp\u1ms.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/2116-30-0x0000000002860000-0x00000000028CE000-memory.dmp

Filesize
440KB

Download
memory/2116-2-0x0000000002860000-0x00000000028CE000-memory.dmp

Filesize
440KB

Download
memory/2116-3-0x0000000000400000-0x0000000000B10000-memory.dmp

Filesize
7.1MB

Download
memory/2116-26-0x0000000000400000-0x0000000000B10000-memory.dmp

Filesize
7.1MB

Download
memory/2116-1-0x0000000000BE0000-0x0000000000CE0000-memory.dmp

Filesize
1024KB

Download
memory/3128-87-0x0000000000B00000-0x0000000000B01000-memory.dmp

Filesize
4KB

Download
memory/3128-27-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/3128-28-0x0000000000B00000-0x0000000000B01000-memory.dmp

Filesize
4KB

Download
memory/3128-74-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5100-35-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/5100-75-0x0000000000400000-0x0000000000AF7000-memory.dmp

Filesize
7.0MB

Download
memory/5100-76-0x0000000000D80000-0x0000000000E80000-memory.dmp

Filesize
1024KB

Download
memory/5100-34-0x0000000000400000-0x0000000000AF7000-memory.dmp

Filesize
7.0MB

Download
memory/5100-88-0x0000000000400000-0x0000000000AF7000-memory.dmp

Filesize
7.0MB

Download
memory/5100-106-0x0000000000400000-0x0000000000AF7000-memory.dmp

Filesize
7.0MB

Download
memory/5100-111-0x0000000000400000-0x0000000000AF7000-memory.dmp

Filesize
7.0MB

Download
memory/5100-15-0x0000000000400000-0x0000000000AF7000-memory.dmp

Filesize
7.0MB

Download
memory/5100-14-0x0000000000B80000-0x0000000000BA7000-memory.dmp

Filesize
156KB

Download
memory/5100-13-0x0000000000D80000-0x0000000000E80000-memory.dmp

Filesize
1024KB

Download
memory/5100-130-0x0000000000400000-0x0000000000AF7000-memory.dmp

Filesize
7.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads