isrstealer | 936daa7b23217158833c1e1b9b05a1ebfb07caa12ad53d11481f2c510f30d6fb

General

Target

JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe
Size

933KB
MD5

5119b8df58fae088f338fb83d9a2b3bc
SHA1

5d6ffd11b68784c6342dc03a044fea4f2550ee1f
SHA256

936daa7b23217158833c1e1b9b05a1ebfb07caa12ad53d11481f2c510f30d6fb
SHA512

83a0df00d54c89d5f624a211a8f84d421e57d452dd8aa9439822ca218835f8980d149eb392d2adae4064f8a0cafeb2e9c9c46b32c9130b00ee93e0eb1a592e88
SSDEEP

12288:ApegXVGSgu10Vdx2mT0tL5kDrPrIrpJl3FbONGNT19Himy8H4CNjGzwUOOUjjoKc:AZsSaQ4PAZ2CJxHjjohNb4i

Score

10^/10

isrstealer discovery 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 4 IoCs

resource	yara_rule
behavioral2/memory/3020-18-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/3020-22-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/3020-38-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/3020-41-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3625106387-4207083342-115176794-1000\Control Panel\International\Geo\Nation	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe

Executes dropped EXE 3 IoCs

pid	Process
1548	AutoUpdatePlus.exe
3020	svchost.exe
3648	svchost.exe

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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3625106387-4207083342-115176794-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\1 = "C:\\Users\\Admin\\AppData\\Roaming\\JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe"	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4504 set thread context of 3020	4504	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	86
PID 3020 set thread context of 3648	3020	svchost.exe	87

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3648-29-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3648-31-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3648-32-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3648-36-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3648-26-0x0000000000400000-0x0000000000453000-memory.dmp	upx

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 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	AutoUpdatePlus.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
1548	AutoUpdatePlus.exe
1548	AutoUpdatePlus.exe
1548	AutoUpdatePlus.exe
1548	AutoUpdatePlus.exe
3020	svchost.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4504 wrote to memory of 1548	4504	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	85
PID 4504 wrote to memory of 1548	4504	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	85
PID 4504 wrote to memory of 1548	4504	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	85
PID 4504 wrote to memory of 3020	4504	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	86
PID 4504 wrote to memory of 3020	4504	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	86
PID 4504 wrote to memory of 3020	4504	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	86
PID 4504 wrote to memory of 3020	4504	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	86
PID 4504 wrote to memory of 3020	4504	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	86
PID 4504 wrote to memory of 3020	4504	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	86
PID 4504 wrote to memory of 3020	4504	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	86
PID 4504 wrote to memory of 3020	4504	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	86
PID 3020 wrote to memory of 3648	3020	svchost.exe	87
PID 3020 wrote to memory of 3648	3020	svchost.exe	87
PID 3020 wrote to memory of 3648	3020	svchost.exe	87
PID 3020 wrote to memory of 3648	3020	svchost.exe	87
PID 3020 wrote to memory of 3648	3020	svchost.exe	87
PID 3020 wrote to memory of 3648	3020	svchost.exe	87
PID 3020 wrote to memory of 3648	3020	svchost.exe	87
PID 3020 wrote to memory of 3648	3020	svchost.exe	87

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4504
- C:\Users\Admin\AppData\Local\Temp\AutoUpdatePlus.exe
  "C:\Users\Admin\AppData\Local\Temp\AutoUpdatePlus.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:1548
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  C:\Users\Admin\AppData\Local\Temp\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3020
- - C:\Users\Admin\AppData\Local\Temp\svchost.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\xMzzx8YnCd.ini"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3648

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

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

Query Registry

1

T1012

System Information Discovery

2

T1082

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

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Downloads

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

Filesize
440KB

MD5
e8b79675961ba6f00a41b947104d2e2a

SHA1
c42402bd9aa85624204083970776519eb881d5c3

SHA256
515d7111bcdb1ba733a5eb5e486df1b375a018c26df70613d3a20b2e42e217e0

SHA512
010951169fecdd530b54a740e7731d3d4aeeb0431ee27fc8cfed55125f7b26b95472aa7aca8f6f92ef3c74174eef0db38785d52b8442692d7b726ad4e1fabbc5

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

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
C:\Users\Admin\AppData\Local\Temp\xMzzx8YnCd.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/3020-41-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3020-38-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3020-18-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3020-22-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3648-31-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3648-32-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3648-34-0x0000000000460000-0x0000000000529000-memory.dmp

Filesize
804KB

Download
memory/3648-36-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3648-26-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3648-29-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4504-0-0x0000000074F22000-0x0000000074F23000-memory.dmp

Filesize
4KB

Download
memory/4504-30-0x0000000074F20000-0x00000000754D1000-memory.dmp

Filesize
5.7MB

Download
memory/4504-2-0x0000000074F20000-0x00000000754D1000-memory.dmp

Filesize
5.7MB

Download
memory/4504-1-0x0000000074F20000-0x00000000754D1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads