isrstealer | ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135

General

Target

ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe
Size

292KB
MD5

46f72a9792eed693a7d4516e8b726f55
SHA1

05c6265aeb56ff9900963189e04735d0ff52ba80
SHA256

ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135
SHA512

bf1f20aa401979b04c306036b0c73280bcfc13981723284679597cf26e74c0dd0158a498377a50bf694eab4c2ca96fd06780f76b5febe38af88d22d6c6e4e6d0
SSDEEP

6144:IHVtad+e62517rYpuvyjtin+x1VIs+SupvgVRnSBR9DICTxRgDKNzM:Y8d+eZ7rYpuvyjt9mscpkRnSBRm5K9

Score

10^/10

isrstealer persistence 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 6 IoCs

resource	yara_rule
behavioral1/memory/1916-59-0x0000000000400000-0x0000000000436000-memory.dmp	family_isrstealer
behavioral1/memory/1916-62-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1916-61-0x0000000000400000-0x0000000000436000-memory.dmp	family_isrstealer
behavioral1/memory/1916-78-0x0000000000400000-0x0000000000436000-memory.dmp	family_isrstealer
behavioral1/memory/1916-83-0x0000000000400000-0x0000000000436000-memory.dmp	family_isrstealer
behavioral1/memory/1916-84-0x0000000000400000-0x0000000000436000-memory.dmp	family_isrstealer

Executes dropped EXE 2 IoCs

pid	Process
1916	cvtres.exe
1484	cvtres.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1484-69-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1484-75-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1484-76-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1484-79-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1484-80-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Loads dropped DLL 2 IoCs

pid	Process
1880	ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe
1916	cvtres.exe

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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows Live = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe"	ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1880 set thread context of 1916	1880	ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe	27
PID 1916 set thread context of 1484	1916	cvtres.exe	28

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1880	ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe
1880	ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1880	ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe
Token: SeDebugPrivilege	1880	ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1916	cvtres.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1880 wrote to memory of 1916	1880	ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe	27
PID 1880 wrote to memory of 1916	1880	ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe	27
PID 1880 wrote to memory of 1916	1880	ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe	27
PID 1880 wrote to memory of 1916	1880	ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe	27
PID 1880 wrote to memory of 1916	1880	ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe	27
PID 1880 wrote to memory of 1916	1880	ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe	27
PID 1880 wrote to memory of 1916	1880	ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe	27
PID 1880 wrote to memory of 1916	1880	ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe	27
PID 1916 wrote to memory of 1484	1916	cvtres.exe	28
PID 1916 wrote to memory of 1484	1916	cvtres.exe	28
PID 1916 wrote to memory of 1484	1916	cvtres.exe	28
PID 1916 wrote to memory of 1484	1916	cvtres.exe	28
PID 1916 wrote to memory of 1484	1916	cvtres.exe	28
PID 1916 wrote to memory of 1484	1916	cvtres.exe	28
PID 1916 wrote to memory of 1484	1916	cvtres.exe	28
PID 1916 wrote to memory of 1484	1916	cvtres.exe	28
PID 1916 wrote to memory of 1484	1916	cvtres.exe	28

C:\Users\Admin\AppData\Local\Temp\ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe
"C:\Users\Admin\AppData\Local\Temp\ed9aa84319abed34e632722d0c483a31195e103f21ddfec4423a5b0c4fd89135.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1880
- C:\Users\Admin\AppData\Local\Temp\cvtres.exe
  C:\Users\Admin\AppData\Local\Temp\\cvtres.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1916
- - C:\Users\Admin\AppData\Local\Temp\cvtres.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\xHLUh5605Q.ini"
    3⤵
    - Executes dropped EXE
    PID:1484

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\cvtres.exe

Filesize
31KB

MD5
ed797d8dc2c92401985d162e42ffa450

SHA1
0f02fc517c7facc4baefde4fe9467fb6488ebabe

SHA256
b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e

SHA512
e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

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

Filesize
31KB

MD5
ed797d8dc2c92401985d162e42ffa450

SHA1
0f02fc517c7facc4baefde4fe9467fb6488ebabe

SHA256
b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e

SHA512
e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

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

Filesize
31KB

MD5
ed797d8dc2c92401985d162e42ffa450

SHA1
0f02fc517c7facc4baefde4fe9467fb6488ebabe

SHA256
b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e

SHA512
e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

Download Submit
C:\Users\Admin\AppData\Local\Temp\xHLUh5605Q.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

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

Filesize
31KB

MD5
ed797d8dc2c92401985d162e42ffa450

SHA1
0f02fc517c7facc4baefde4fe9467fb6488ebabe

SHA256
b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e

SHA512
e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

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

Filesize
31KB

MD5
ed797d8dc2c92401985d162e42ffa450

SHA1
0f02fc517c7facc4baefde4fe9467fb6488ebabe

SHA256
b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e

SHA512
e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

Download Submit
memory/1484-76-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1484-80-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1484-79-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1484-69-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1484-75-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1880-71-0x0000000074350000-0x00000000748FB000-memory.dmp

Filesize
5.7MB

Download
memory/1880-54-0x0000000076201000-0x0000000076203000-memory.dmp

Filesize
8KB

Download
memory/1880-77-0x0000000074350000-0x00000000748FB000-memory.dmp

Filesize
5.7MB

Download
memory/1916-57-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/1916-61-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/1916-78-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/1916-59-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/1916-56-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/1916-83-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/1916-84-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download

Analysis

Sharing