isrstealer | 6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4

General

Target

6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe
Size

1.1MB
MD5

fd284de48fceb1580a3a4f69e382cdb4
SHA1

dee73f2265bac5427da3920e49a8bf5f1f3e7d93
SHA256

6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4
SHA512

9a87fb545b73ff818d0b45e998a12a8a9e2ed0eb8400e029bbc65c19f48c324050214ae5a55458609a24f4a114e2065b64984eb9ae5c5262f855f508326cdb79
SSDEEP

12288:/aWzgMg7v3qnCiMErQohh0F4CCJ8lny/Qo6oImr69oGE15jSsFZyoopSqM14C:iaHMv6Corjqny/Qo6DcsoRNFZyomW4C

Score

10^/10

isrstealer collection spyware stealer trojan upx

Malware Config

Signatures

ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
trojan stealer isrstealer

ISR Stealer payload 5 IoCs

resource	yara_rule
behavioral1/memory/304-58-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/304-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/304-61-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/304-81-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/304-82-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2028-79-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/2028-80-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/2028-79-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/2028-80-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1116-65-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1116-69-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1116-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1116-71-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1116-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2028-74-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2028-78-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2028-79-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2028-80-0x0000000000400000-0x000000000041F000-memory.dmp	upx

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
T1081

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1480 set thread context of 304	1480	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	27
PID 304 set thread context of 1116	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	28
PID 304 set thread context of 2028	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	29

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
1480	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe
1480	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe
1480	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
1480	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe
1480	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe
1480	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 1480 wrote to memory of 304	1480	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	27
PID 1480 wrote to memory of 304	1480	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	27
PID 1480 wrote to memory of 304	1480	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	27
PID 1480 wrote to memory of 304	1480	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	27
PID 1480 wrote to memory of 304	1480	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	27
PID 1480 wrote to memory of 304	1480	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	27
PID 1480 wrote to memory of 304	1480	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	27
PID 304 wrote to memory of 1116	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	28
PID 304 wrote to memory of 1116	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	28
PID 304 wrote to memory of 1116	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	28
PID 304 wrote to memory of 1116	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	28
PID 304 wrote to memory of 1116	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	28
PID 304 wrote to memory of 1116	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	28
PID 304 wrote to memory of 1116	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	28
PID 304 wrote to memory of 1116	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	28
PID 304 wrote to memory of 1116	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	28
PID 304 wrote to memory of 2028	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	29
PID 304 wrote to memory of 2028	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	29
PID 304 wrote to memory of 2028	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	29
PID 304 wrote to memory of 2028	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	29
PID 304 wrote to memory of 2028	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	29
PID 304 wrote to memory of 2028	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	29
PID 304 wrote to memory of 2028	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	29
PID 304 wrote to memory of 2028	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	29
PID 304 wrote to memory of 2028	304	6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe	29

C:\Users\Admin\AppData\Local\Temp\6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe
"C:\Users\Admin\AppData\Local\Temp\6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1480
- C:\Users\Admin\AppData\Local\Temp\6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe
  "C:\Users\Admin\AppData\Local\Temp\6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:304
- - C:\Users\Admin\AppData\Local\Temp\6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\qjjA8OPRlS.ini"
    3⤵
    PID:1116
- - C:\Users\Admin\AppData\Local\Temp\6d516cacdafd6aba0cb19db4b66b1fce73d3079d6c0775d14b463a2ef2fd27c4.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\c65nsMRVdi.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:2028

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\qjjA8OPRlS.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/304-55-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/304-56-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/304-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/304-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/304-82-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/304-81-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1116-71-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1116-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1116-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1116-69-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1116-65-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1480-54-0x0000000076201000-0x0000000076203000-memory.dmp

Filesize
8KB

Download
memory/2028-74-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2028-78-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2028-79-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2028-80-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

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