stealc | d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
30-06-2024 01:24

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General

Target

d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe
Size

4.7MB
MD5

6320d63025e1764e578680e24906def3
SHA1

b452cb8f5fe2b5683b8ea94b90c5d3f415e53832
SHA256

d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0
SHA512

f75d2700fafea373de7f2c4131a650128d38146ef8fd7edef0c186ce3ebc1fb51b116f91596891d68f893a56b30e14035e565a55d0e5d228462c9e3e7a68dc51
SSDEEP

98304:KjG9asZlqf3mTJBMAxu8l+yzWCdlPtclKfWN6D:KjGgsZlqvmT8wu8lZWCzo+

Score

10^/10

stealc vidar spyware stealer

Malware Config

Extracted

Family

vidar

https://t.me/g067n

https://steamcommunity.com/profiles/76561199707802586

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Signatures

Detect Vidar Stealer 3 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/2420-80-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2420-229-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2420-673-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Detect binaries embedding considerable number of MFA browser extension IDs. 1 IoCs

Processes:

resource yara_rule

behavioral1/memory/2420-673-0x0000000000400000-0x0000000000648000-memory.dmp INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 1 IoCs

Processes:

resource yara_rule

behavioral1/memory/2420-673-0x0000000000400000-0x0000000000648000-memory.dmp INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs

resource	yara_rule
behavioral1/memory/2420-673-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs

resource	yara_rule
behavioral1/memory/2420-673-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs

Detects Windows executables referencing non-Windows User-Agents 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2420-80-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2420-229-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2420-673-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 1 IoCs

Processes:

resource yara_rule

behavioral1/memory/2420-673-0x0000000000400000-0x0000000000648000-memory.dmp INDICATOR_SUSPICIOUS_Binary_References_Browsers
Downloads MZ/PE file
Executes dropped EXE 3 IoCs

Processes:

BKFIJJEGHD.exeIECGIEBAEB.exeJKKECBGIII.exe

pid process

344 BKFIJJEGHD.exe
692 IECGIEBAEB.exe
452 JKKECBGIII.exe

resource	yara_rule
behavioral1/memory/2420-673-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

pid	process
344	BKFIJJEGHD.exe
692	IECGIEBAEB.exe
452	JKKECBGIII.exe

Loads dropped DLL 21 IoCs

Processes:

MSBuild.exeWerFault.exeWerFault.exeWerFault.exe

pid	process
2420	MSBuild.exe
2420	MSBuild.exe
2420	MSBuild.exe
2420	MSBuild.exe
2780	WerFault.exe
2780	WerFault.exe
2780	WerFault.exe
2420	MSBuild.exe
2420	MSBuild.exe
2420	MSBuild.exe
2420	MSBuild.exe
2420	MSBuild.exe
2420	MSBuild.exe
2420	MSBuild.exe
2420	MSBuild.exe
1424	WerFault.exe
1424	WerFault.exe
1424	WerFault.exe
1720	WerFault.exe
1720	WerFault.exe
1720	WerFault.exe

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

Data from Local System
T1005

Credentials In Files
T1552.001
Suspicious use of SetThreadContext 1 IoCs

Processes:

d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe

description pid process target process

PID 2320 set thread context of 2420 2320 d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe MSBuild.exe
Program crash 3 IoCs

Processes:

WerFault.exeWerFault.exeWerFault.exe

pid pid_target process target process

2780 344 WerFault.exe BKFIJJEGHD.exe
1424 452 WerFault.exe JKKECBGIII.exe
1720 692 WerFault.exe IECGIEBAEB.exe

description	pid	process	target process
PID 2320 set thread context of 2420	2320	d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe	MSBuild.exe

pid	pid_target	process	target process
2780	344	WerFault.exe	BKFIJJEGHD.exe
1424	452	WerFault.exe	JKKECBGIII.exe
1720	692	WerFault.exe	IECGIEBAEB.exe

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

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	MSBuild.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	MSBuild.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2580 timeout.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

MSBuild.exe

pid process

2420 MSBuild.exe
2420 MSBuild.exe
2420 MSBuild.exe
2420 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe

description pid process

Token: SeDebugPrivilege 2320 d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe

pid	process
2580	timeout.exe

description	pid	process
Token: SeDebugPrivilege	2320	d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe

Suspicious use of WriteProcessMemory 42 IoCs

Processes:

d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exeMSBuild.exeBKFIJJEGHD.exeJKKECBGIII.execmd.exeIECGIEBAEB.exe

description	pid	process	target process
PID 2320 wrote to memory of 2420	2320	d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe	MSBuild.exe
PID 2320 wrote to memory of 2420	2320	d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe	MSBuild.exe
PID 2320 wrote to memory of 2420	2320	d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe	MSBuild.exe
PID 2320 wrote to memory of 2420	2320	d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe	MSBuild.exe
PID 2320 wrote to memory of 2420	2320	d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe	MSBuild.exe
PID 2320 wrote to memory of 2420	2320	d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe	MSBuild.exe
PID 2320 wrote to memory of 2420	2320	d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe	MSBuild.exe
PID 2320 wrote to memory of 2420	2320	d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe	MSBuild.exe
PID 2320 wrote to memory of 2420	2320	d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe	MSBuild.exe
PID 2320 wrote to memory of 2420	2320	d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe	MSBuild.exe
PID 2420 wrote to memory of 344	2420	MSBuild.exe	BKFIJJEGHD.exe
PID 2420 wrote to memory of 344	2420	MSBuild.exe	BKFIJJEGHD.exe
PID 2420 wrote to memory of 344	2420	MSBuild.exe	BKFIJJEGHD.exe
PID 2420 wrote to memory of 344	2420	MSBuild.exe	BKFIJJEGHD.exe
PID 344 wrote to memory of 2780	344	BKFIJJEGHD.exe	WerFault.exe
PID 344 wrote to memory of 2780	344	BKFIJJEGHD.exe	WerFault.exe
PID 344 wrote to memory of 2780	344	BKFIJJEGHD.exe	WerFault.exe
PID 344 wrote to memory of 2780	344	BKFIJJEGHD.exe	WerFault.exe
PID 2420 wrote to memory of 692	2420	MSBuild.exe	IECGIEBAEB.exe
PID 2420 wrote to memory of 692	2420	MSBuild.exe	IECGIEBAEB.exe
PID 2420 wrote to memory of 692	2420	MSBuild.exe	IECGIEBAEB.exe
PID 2420 wrote to memory of 692	2420	MSBuild.exe	IECGIEBAEB.exe
PID 2420 wrote to memory of 452	2420	MSBuild.exe	JKKECBGIII.exe
PID 2420 wrote to memory of 452	2420	MSBuild.exe	JKKECBGIII.exe
PID 2420 wrote to memory of 452	2420	MSBuild.exe	JKKECBGIII.exe
PID 2420 wrote to memory of 452	2420	MSBuild.exe	JKKECBGIII.exe
PID 452 wrote to memory of 1424	452	JKKECBGIII.exe	WerFault.exe
PID 452 wrote to memory of 1424	452	JKKECBGIII.exe	WerFault.exe
PID 452 wrote to memory of 1424	452	JKKECBGIII.exe	WerFault.exe
PID 452 wrote to memory of 1424	452	JKKECBGIII.exe	WerFault.exe
PID 2420 wrote to memory of 2536	2420	MSBuild.exe	cmd.exe
PID 2420 wrote to memory of 2536	2420	MSBuild.exe	cmd.exe
PID 2420 wrote to memory of 2536	2420	MSBuild.exe	cmd.exe
PID 2420 wrote to memory of 2536	2420	MSBuild.exe	cmd.exe
PID 2536 wrote to memory of 2580	2536	cmd.exe	timeout.exe
PID 2536 wrote to memory of 2580	2536	cmd.exe	timeout.exe
PID 2536 wrote to memory of 2580	2536	cmd.exe	timeout.exe
PID 2536 wrote to memory of 2580	2536	cmd.exe	timeout.exe
PID 692 wrote to memory of 1720	692	IECGIEBAEB.exe	WerFault.exe
PID 692 wrote to memory of 1720	692	IECGIEBAEB.exe	WerFault.exe
PID 692 wrote to memory of 1720	692	IECGIEBAEB.exe	WerFault.exe
PID 692 wrote to memory of 1720	692	IECGIEBAEB.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe
"C:\Users\Admin\AppData\Local\Temp\d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2320

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
2⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2420

C:\ProgramData\BKFIJJEGHD.exe
"C:\ProgramData\BKFIJJEGHD.exe"
3⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:344

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 344 -s 96
4⤵
- Loads dropped DLL
- Program crash
PID:2780

C:\ProgramData\IECGIEBAEB.exe
"C:\ProgramData\IECGIEBAEB.exe"
3⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:692

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 692 -s 104
4⤵
- Loads dropped DLL
- Program crash
PID:1720

C:\ProgramData\JKKECBGIII.exe
"C:\ProgramData\JKKECBGIII.exe"
3⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:452

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 452 -s 96
4⤵
- Loads dropped DLL
- Program crash
PID:1424

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\EGDGDHJJDGHC" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:2536

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:2580

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize
342B

MD5
5138096af4582f40e081bcf0665bcb51

SHA1
4a9816c785bdfd2a83867621bafebe982f65f804

SHA256
e117dd31e3bfcc94aef7749c470ea909487873d596f0ed756d6097feb45f532f

SHA512
aca953a8e736dbfc381f8eb7b83b00a7f18393e341480446983e0b0808a312dfd966a1249bd35806f626c138746e9340cccc58f0b9380d5d7e9af59104d54bfd

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar6291.tmp
Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
\ProgramData\BKFIJJEGHD.exe
Filesize
1.8MB

MD5
785a4d0ce6dee4c3bccd020a9d1b5ed9

SHA1
9d610511936fd60e388f344729c06a2db7479ade

SHA256
f5093c69b58ce1149d43a7ec268eba733115429e26ca23820571306571b31ead

SHA512
1fe0c987530a8183a0789f799bd949b1f8b2fb25bfc6110521dac5b68306f8e9c8028a952c9430b96a082c701760eade51a3112d9b8b04bf77f4c356d19d0f51

Download Submit
\ProgramData\IECGIEBAEB.exe
Filesize
520KB

MD5
3900de86228c8f839d6d4b483794457b

SHA1
90e24676fd3ebcda8635704e762e83d3fbd9cfba

SHA256
00c4e525ffb64ff858bb8922e3ab46ee6d65c67a3fa7d9f3a614aaf1604f27e3

SHA512
5bd0c7f623a6a3c11091391c72868c4462525618164d40a28a19dc5913766b7ebb2878206b4077a7374de23562343748e27e4594ad5c56434fb9fff40e91f4dc

Download Submit
\ProgramData\JKKECBGIII.exe
Filesize
643KB

MD5
f03f43046831d8eee22e959770aaedf1

SHA1
3e63791066428f782286f4180f82631240326344

SHA256
04dbcbb46b56d4bff31ca8b58d398a90bca5f523a3ba6b8c7300e4ee19c54124

SHA512
128e942b7a1778385866e8ab336ef778d7e6248b037345c0d36dd8e8329ea7952956dc7ed30ee4af58fe22a319f26c28f7062916a07a4dcd3930d854cfc6f57e

Download Submit
memory/2320-49-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-44-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-4-0x00000000056D0000-0x0000000005844000-memory.dmp

Filesize
1.5MB

Download
memory/2320-5-0x00000000004D0000-0x00000000004EC000-memory.dmp

Filesize
112KB

Download
memory/2320-25-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-6-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-7-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-11-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-31-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-65-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-63-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-61-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-66-0x0000000074940000-0x000000007502E000-memory.dmp

Filesize
6.9MB

Download
memory/2320-59-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-57-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-55-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-53-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-51-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-2-0x0000000000440000-0x000000000044A000-memory.dmp

Filesize
40KB

Download
memory/2320-47-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-45-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-3-0x0000000074940000-0x000000007502E000-memory.dmp

Filesize
6.9MB

Download
memory/2320-41-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-39-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-37-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-35-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-33-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-29-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-27-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-23-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-21-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-20-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-17-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-15-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-14-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-9-0x00000000004D0000-0x00000000004E5000-memory.dmp

Filesize
84KB

Download
memory/2320-81-0x0000000074940000-0x000000007502E000-memory.dmp

Filesize
6.9MB

Download
memory/2320-0-0x000000007494E000-0x000000007494F000-memory.dmp

Filesize
4KB

Download
memory/2320-1-0x0000000000F80000-0x000000000143C000-memory.dmp

Filesize
4.7MB

Download
memory/2420-80-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2420-69-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2420-67-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2420-229-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2420-673-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download