isrstealer | 8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5

General

Target

8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe
Size

247KB
MD5

81ab97fdd0660d08d6f6334116431309
SHA1

0e99bc5fab08cc8b1d379d3addef0f96c3196f3a
SHA256

8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5
SHA512

0d94e66a01f5a4228460bca3d5ed040c585aa4d9ef1f9777e6471b3909cd09ebaedfe3d619005af16bff5e7da8e43dff4ac8b0e4d0c5f39214fde76bf319119e
SSDEEP

6144:f4Ma4fmYPR06+8pB+3Qsu0wtSZvTEiqjmxCm3rF:zN06+84Qs+t6z

Score

10^/10

isrstealer 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 2 IoCs

resource	yara_rule
behavioral2/memory/4180-140-0x0000000000400000-0x0000000000417000-memory.dmp	family_isrstealer
behavioral2/memory/4180-144-0x0000000000400000-0x0000000000417000-memory.dmp	family_isrstealer

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4180-134-0x0000000000400000-0x0000000000417000-memory.dmp	upx
behavioral2/memory/4180-135-0x0000000000400000-0x0000000000417000-memory.dmp	upx
behavioral2/memory/4180-136-0x0000000000400000-0x0000000000417000-memory.dmp	upx
behavioral2/memory/4180-139-0x0000000000400000-0x0000000000417000-memory.dmp	upx
behavioral2/memory/4180-140-0x0000000000400000-0x0000000000417000-memory.dmp	upx
behavioral2/memory/4180-144-0x0000000000400000-0x0000000000417000-memory.dmp	upx

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
T1081
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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4964 set thread context of 4180	4964	8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe	82

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4180	8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe
4180	8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe
4180	8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe
4180	8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe
4180	8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe
4180	8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe
4180	8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe
4180	8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4180	8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4964 wrote to memory of 4180	4964	8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe	82
PID 4964 wrote to memory of 4180	4964	8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe	82
PID 4964 wrote to memory of 4180	4964	8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe	82
PID 4964 wrote to memory of 4180	4964	8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe	82
PID 4964 wrote to memory of 4180	4964	8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe	82
PID 4964 wrote to memory of 4180	4964	8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe	82
PID 4964 wrote to memory of 4180	4964	8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe	82
PID 4964 wrote to memory of 4180	4964	8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe	82

C:\Users\Admin\AppData\Local\Temp\8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe
"C:\Users\Admin\AppData\Local\Temp\8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4964
- C:\Users\Admin\AppData\Local\Temp\8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe
  C:\Users\Admin\AppData\Local\Temp\8e4706364a18071abeaabb5a40a08b43205e77ff7955c6a933efe1f93a3507d5.exe
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:4180

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/4180-134-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4180-135-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4180-136-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4180-139-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4180-140-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4180-144-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4964-132-0x0000000000400000-0x000000000048F000-memory.dmp

Filesize
572KB

Download
memory/4964-141-0x0000000000400000-0x000000000048F000-memory.dmp

Filesize
572KB

Download

Analysis

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