isrstealer | 425983cc82d0b23ad35586397a46ed5cba98af15a21d6266ddcf073006a9830c

Analysis

max time kernel
37s
max time network
46s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
23-11-2022 14:29

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General

Target

425983cc82d0b23ad35586397a46ed5cba98af15a21d6266ddcf073006a9830c.exe
Size

1.3MB
MD5

ce2efcc4baef5fed9b20ad44cf4bf716
SHA1

6b510ac7433d1cfe0c859b1cc36dbecfdd424619
SHA256

425983cc82d0b23ad35586397a46ed5cba98af15a21d6266ddcf073006a9830c
SHA512

01aa59a094d894df74e2aa9614d076326f1acfb6535107479375f4f8e626df6183291c4369d16190b7e6d6efc9a640b9f2b1d0d709d84c7890abedad2c573800
SSDEEP

24576:4lmdVcLgnDAUf5AMpcDJ2WVcvBcC4zj9f7rQieJsU9eZ3Sv:umUgnD3byDcuhQi6e

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 5 IoCs

resource	yara_rule
behavioral1/memory/1752-68-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/1752-70-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/1752-71-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1752-85-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/1752-87-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Executes dropped EXE 4 IoCs

pid	Process
1104	install.exe
1948	keygen.exe
1752	install.exe
1812	install.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1812-78-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1812-83-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1812-84-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1812-86-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1812-88-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Loads dropped DLL 2 IoCs

pid	Process
1104	install.exe
1752	install.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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1104 set thread context of 1752	1104	install.exe	29
PID 1752 set thread context of 1812	1752	install.exe	30

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 SetWindowsHookEx 1 IoCs

pid	Process
1752	install.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 552 wrote to memory of 1104	552	425983cc82d0b23ad35586397a46ed5cba98af15a21d6266ddcf073006a9830c.exe	27
PID 552 wrote to memory of 1104	552	425983cc82d0b23ad35586397a46ed5cba98af15a21d6266ddcf073006a9830c.exe	27
PID 552 wrote to memory of 1104	552	425983cc82d0b23ad35586397a46ed5cba98af15a21d6266ddcf073006a9830c.exe	27
PID 552 wrote to memory of 1104	552	425983cc82d0b23ad35586397a46ed5cba98af15a21d6266ddcf073006a9830c.exe	27
PID 552 wrote to memory of 1104	552	425983cc82d0b23ad35586397a46ed5cba98af15a21d6266ddcf073006a9830c.exe	27
PID 552 wrote to memory of 1104	552	425983cc82d0b23ad35586397a46ed5cba98af15a21d6266ddcf073006a9830c.exe	27
PID 552 wrote to memory of 1104	552	425983cc82d0b23ad35586397a46ed5cba98af15a21d6266ddcf073006a9830c.exe	27
PID 552 wrote to memory of 1948	552	425983cc82d0b23ad35586397a46ed5cba98af15a21d6266ddcf073006a9830c.exe	28
PID 552 wrote to memory of 1948	552	425983cc82d0b23ad35586397a46ed5cba98af15a21d6266ddcf073006a9830c.exe	28
PID 552 wrote to memory of 1948	552	425983cc82d0b23ad35586397a46ed5cba98af15a21d6266ddcf073006a9830c.exe	28
PID 1104 wrote to memory of 1752	1104	install.exe	29
PID 1104 wrote to memory of 1752	1104	install.exe	29
PID 1104 wrote to memory of 1752	1104	install.exe	29
PID 1104 wrote to memory of 1752	1104	install.exe	29
PID 1104 wrote to memory of 1752	1104	install.exe	29
PID 1104 wrote to memory of 1752	1104	install.exe	29
PID 1104 wrote to memory of 1752	1104	install.exe	29
PID 1104 wrote to memory of 1752	1104	install.exe	29
PID 1104 wrote to memory of 1752	1104	install.exe	29
PID 1104 wrote to memory of 1752	1104	install.exe	29
PID 1104 wrote to memory of 1752	1104	install.exe	29
PID 1752 wrote to memory of 1812	1752	install.exe	30
PID 1752 wrote to memory of 1812	1752	install.exe	30
PID 1752 wrote to memory of 1812	1752	install.exe	30
PID 1752 wrote to memory of 1812	1752	install.exe	30
PID 1752 wrote to memory of 1812	1752	install.exe	30
PID 1752 wrote to memory of 1812	1752	install.exe	30
PID 1752 wrote to memory of 1812	1752	install.exe	30
PID 1752 wrote to memory of 1812	1752	install.exe	30
PID 1752 wrote to memory of 1812	1752	install.exe	30
PID 1752 wrote to memory of 1812	1752	install.exe	30
PID 1752 wrote to memory of 1812	1752	install.exe	30
PID 1752 wrote to memory of 1812	1752	install.exe	30

C:\Users\Admin\AppData\Local\Temp\425983cc82d0b23ad35586397a46ed5cba98af15a21d6266ddcf073006a9830c.exe
"C:\Users\Admin\AppData\Local\Temp\425983cc82d0b23ad35586397a46ed5cba98af15a21d6266ddcf073006a9830c.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:552
- C:\Users\Admin\AppData\Local\Temp\install.exe
  "C:\Users\Admin\AppData\Local\Temp\install.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:1104
- - C:\Users\Admin\AppData\Local\Temp\install.exe
    C:\Users\Admin\AppData\Local\Temp\install.exe
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1752
  - - C:\Users\Admin\AppData\Local\Temp\install.exe
      /scomma "C:\Users\Admin\AppData\Local\Temp\raNXAxfgtV.ini"
      4⤵
      Executes dropped EXE
      PID:1812
- C:\Users\Admin\AppData\Local\Temp\keygen.exe
  "C:\Users\Admin\AppData\Local\Temp\keygen.exe"
  2⤵
  - Executes dropped EXE
  PID:1948

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
583KB

MD5
4dbee433c083b0a761b18e49a5036bab

SHA1
fd1390641a2cb532b3548d3da883f81bf057c5b9

SHA256
8b1590bbe26ddb03f26232e14c7445c8a2ac0abcec8ff13ded9a6c6ebe487565

SHA512
6f809a8c993be6120ad85575ba783627bbfdbea2f8f9a49fca6566ef575762c3a203d5ec74746eea592da0df2343a264db6bef180623e345fd5ba4a476846f93

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

Filesize
583KB

MD5
4dbee433c083b0a761b18e49a5036bab

SHA1
fd1390641a2cb532b3548d3da883f81bf057c5b9

SHA256
8b1590bbe26ddb03f26232e14c7445c8a2ac0abcec8ff13ded9a6c6ebe487565

SHA512
6f809a8c993be6120ad85575ba783627bbfdbea2f8f9a49fca6566ef575762c3a203d5ec74746eea592da0df2343a264db6bef180623e345fd5ba4a476846f93

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

Filesize
583KB

MD5
4dbee433c083b0a761b18e49a5036bab

SHA1
fd1390641a2cb532b3548d3da883f81bf057c5b9

SHA256
8b1590bbe26ddb03f26232e14c7445c8a2ac0abcec8ff13ded9a6c6ebe487565

SHA512
6f809a8c993be6120ad85575ba783627bbfdbea2f8f9a49fca6566ef575762c3a203d5ec74746eea592da0df2343a264db6bef180623e345fd5ba4a476846f93

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

Filesize
583KB

MD5
4dbee433c083b0a761b18e49a5036bab

SHA1
fd1390641a2cb532b3548d3da883f81bf057c5b9

SHA256
8b1590bbe26ddb03f26232e14c7445c8a2ac0abcec8ff13ded9a6c6ebe487565

SHA512
6f809a8c993be6120ad85575ba783627bbfdbea2f8f9a49fca6566ef575762c3a203d5ec74746eea592da0df2343a264db6bef180623e345fd5ba4a476846f93

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

Filesize
357KB

MD5
4d8060b9e121f86e4205134fb0e0b629

SHA1
b43d2fd79767737a692dd8b37a64a714436e5fa0

SHA256
80e090798620727eb5eef8591baa5fdc4e769729390c71abf01e7a15334d0d49

SHA512
5b2dd91341818729d0c9e42f511708f4ea2027d3d26d194fdbb3066720595e95d510cda88ca7f6ec59ce7d8769c42965d372e8a17fe640bee9f5efc5179e9a28

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

Filesize
357KB

MD5
4d8060b9e121f86e4205134fb0e0b629

SHA1
b43d2fd79767737a692dd8b37a64a714436e5fa0

SHA256
80e090798620727eb5eef8591baa5fdc4e769729390c71abf01e7a15334d0d49

SHA512
5b2dd91341818729d0c9e42f511708f4ea2027d3d26d194fdbb3066720595e95d510cda88ca7f6ec59ce7d8769c42965d372e8a17fe640bee9f5efc5179e9a28

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

Filesize
583KB

MD5
4dbee433c083b0a761b18e49a5036bab

SHA1
fd1390641a2cb532b3548d3da883f81bf057c5b9

SHA256
8b1590bbe26ddb03f26232e14c7445c8a2ac0abcec8ff13ded9a6c6ebe487565

SHA512
6f809a8c993be6120ad85575ba783627bbfdbea2f8f9a49fca6566ef575762c3a203d5ec74746eea592da0df2343a264db6bef180623e345fd5ba4a476846f93

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

Filesize
583KB

MD5
4dbee433c083b0a761b18e49a5036bab

SHA1
fd1390641a2cb532b3548d3da883f81bf057c5b9

SHA256
8b1590bbe26ddb03f26232e14c7445c8a2ac0abcec8ff13ded9a6c6ebe487565

SHA512
6f809a8c993be6120ad85575ba783627bbfdbea2f8f9a49fca6566ef575762c3a203d5ec74746eea592da0df2343a264db6bef180623e345fd5ba4a476846f93

Download Submit
memory/552-54-0x000007FEF3D10000-0x000007FEF4733000-memory.dmp

Filesize
10.1MB

Download
memory/552-55-0x000007FEFB6B1000-0x000007FEFB6B3000-memory.dmp

Filesize
8KB

Download
memory/1752-68-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1752-66-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1752-70-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1752-65-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1752-87-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1752-85-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1812-82-0x0000000075131000-0x0000000075133000-memory.dmp

Filesize
8KB

Download
memory/1812-83-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1812-84-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1812-78-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1812-86-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1812-88-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1948-61-0x00000000002B0000-0x0000000000310000-memory.dmp

Filesize
384KB

Download