isrstealer | be62d9b011b6d7aa0f1581bb815014e0b6c311d1402b27e8360c5e3a76158ae6

General

Target

4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe
Size

519KB
MD5

4c4ed1cd162b5d91926cae606b66d489
SHA1

0045d9832e535e74419c131b2338bd43bdb14042
SHA256

be62d9b011b6d7aa0f1581bb815014e0b6c311d1402b27e8360c5e3a76158ae6
SHA512

20fb85f2ec8f46970dac5055afc3e3e6b9e6795f339293f9dba608f42b7bd45a622bde33112ab8153891b7173387a33858a605015ff1807b9b363b6b217dc448
SSDEEP

12288:Sg22uRdmOOJozR2k2VGd1LuJcZAeuTA4e+uia62oO3REbpc4Q3Z:SgbuPmtJozsk2ViYmZAeuTLTul62Fp

Score

10^/10

isrstealer discovery 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/1920-11-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/1920-9-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/1920-13-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/1920-44-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/1920-47-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2528 set thread context of 1920	2528	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	29
PID 1920 set thread context of 2736	1920	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	30

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2528-0-0x0000000000400000-0x00000000005A4000-memory.dmp	upx
behavioral1/memory/2528-2-0x0000000000400000-0x00000000005A4000-memory.dmp	upx
behavioral1/memory/2528-16-0x0000000000400000-0x00000000005A4000-memory.dmp	upx
behavioral1/memory/2736-19-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2736-22-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2736-24-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2736-23-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2736-26-0x0000000000400000-0x0000000000453000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1920	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2528 wrote to memory of 1920	2528	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	29
PID 2528 wrote to memory of 1920	2528	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	29
PID 2528 wrote to memory of 1920	2528	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	29
PID 2528 wrote to memory of 1920	2528	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	29
PID 2528 wrote to memory of 1920	2528	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	29
PID 2528 wrote to memory of 1920	2528	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	29
PID 2528 wrote to memory of 1920	2528	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	29
PID 2528 wrote to memory of 1920	2528	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	29
PID 1920 wrote to memory of 2736	1920	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	30
PID 1920 wrote to memory of 2736	1920	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	30
PID 1920 wrote to memory of 2736	1920	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	30
PID 1920 wrote to memory of 2736	1920	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	30
PID 1920 wrote to memory of 2736	1920	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	30
PID 1920 wrote to memory of 2736	1920	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	30
PID 1920 wrote to memory of 2736	1920	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	30
PID 1920 wrote to memory of 2736	1920	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	30
PID 1920 wrote to memory of 2736	1920	4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2528
- C:\Users\Admin\AppData\Local\Temp\4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1920
- - C:\Users\Admin\AppData\Local\Temp\4c4ed1cd162b5d91926cae606b66d489_JaffaCakes118.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\xEkaWIR3ng.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2736

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\xEkaWIR3ng.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1920-20-0x00000000028C0000-0x0000000002A64000-memory.dmp

Filesize
1.6MB

Download
memory/1920-44-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1920-47-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1920-6-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1920-4-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1920-11-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1920-9-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1920-13-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1920-45-0x0000000000520000-0x0000000000620000-memory.dmp

Filesize
1024KB

Download
memory/2528-3-0x0000000000491000-0x000000000049B000-memory.dmp

Filesize
40KB

Download
memory/2528-0-0x0000000000400000-0x00000000005A4000-memory.dmp

Filesize
1.6MB

Download
memory/2528-16-0x0000000000400000-0x00000000005A4000-memory.dmp

Filesize
1.6MB

Download
memory/2528-2-0x0000000000400000-0x00000000005A4000-memory.dmp

Filesize
1.6MB

Download
memory/2528-1-0x00000000002B0000-0x00000000002B1000-memory.dmp

Filesize
4KB

Download
memory/2736-19-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2736-26-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2736-23-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2736-24-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2736-22-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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