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
behavioral1/memory/2556-24-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2556-21-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2556-42-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2556-46-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Executes dropped EXE 3 IoCs

pid	Process
3008	AutoUpdatePlus.exe
2556	svchost.exe
2104	svchost.exe

Loads dropped DLL 6 IoCs

pid	Process
1048	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe
3008	AutoUpdatePlus.exe
3008	AutoUpdatePlus.exe
3008	AutoUpdatePlus.exe
1048	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe
2556	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-1-5-21-1163522206-1469769407-485553996-1000\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 1048 set thread context of 2556	1048	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	31
PID 2556 set thread context of 2104	2556	svchost.exe	32

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2104-37-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2104-36-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2104-35-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2104-32-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2104-40-0x0000000000400000-0x0000000000453000-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	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe
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

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
3008	AutoUpdatePlus.exe
3008	AutoUpdatePlus.exe
3008	AutoUpdatePlus.exe
3008	AutoUpdatePlus.exe
2556	svchost.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1048 wrote to memory of 3008	1048	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	30
PID 1048 wrote to memory of 3008	1048	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	30
PID 1048 wrote to memory of 3008	1048	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	30
PID 1048 wrote to memory of 3008	1048	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	30
PID 1048 wrote to memory of 3008	1048	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	30
PID 1048 wrote to memory of 3008	1048	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	30
PID 1048 wrote to memory of 3008	1048	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	30
PID 1048 wrote to memory of 2556	1048	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	31
PID 1048 wrote to memory of 2556	1048	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	31
PID 1048 wrote to memory of 2556	1048	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	31
PID 1048 wrote to memory of 2556	1048	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	31
PID 1048 wrote to memory of 2556	1048	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	31
PID 1048 wrote to memory of 2556	1048	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	31
PID 1048 wrote to memory of 2556	1048	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	31
PID 1048 wrote to memory of 2556	1048	JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe	31
PID 2556 wrote to memory of 2104	2556	svchost.exe	32
PID 2556 wrote to memory of 2104	2556	svchost.exe	32
PID 2556 wrote to memory of 2104	2556	svchost.exe	32
PID 2556 wrote to memory of 2104	2556	svchost.exe	32
PID 2556 wrote to memory of 2104	2556	svchost.exe	32
PID 2556 wrote to memory of 2104	2556	svchost.exe	32
PID 2556 wrote to memory of 2104	2556	svchost.exe	32
PID 2556 wrote to memory of 2104	2556	svchost.exe	32
PID 2556 wrote to memory of 2104	2556	svchost.exe	32

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_5119b8df58fae088f338fb83d9a2b3bc.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1048
- C:\Users\Admin\AppData\Local\Temp\AutoUpdatePlus.exe
  "C:\Users\Admin\AppData\Local\Temp\AutoUpdatePlus.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:3008
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  C:\Users\Admin\AppData\Local\Temp\svchost.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2556
- - C:\Users\Admin\AppData\Local\Temp\svchost.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\k4VPihGPAJ.ini"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2104

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

System Information Discovery

1

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\k4VPihGPAJ.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

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

Filesize
440KB

MD5
e8b79675961ba6f00a41b947104d2e2a

SHA1
c42402bd9aa85624204083970776519eb881d5c3

SHA256
515d7111bcdb1ba733a5eb5e486df1b375a018c26df70613d3a20b2e42e217e0

SHA512
010951169fecdd530b54a740e7731d3d4aeeb0431ee27fc8cfed55125f7b26b95472aa7aca8f6f92ef3c74174eef0db38785d52b8442692d7b726ad4e1fabbc5

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

Filesize
1.1MB

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

Download Submit
memory/1048-34-0x0000000074B80000-0x000000007512B000-memory.dmp

Filesize
5.7MB

Download
memory/1048-1-0x0000000074B80000-0x000000007512B000-memory.dmp

Filesize
5.7MB

Download
memory/1048-3-0x0000000074B80000-0x000000007512B000-memory.dmp

Filesize
5.7MB

Download
memory/1048-0-0x0000000074B81000-0x0000000074B82000-memory.dmp

Filesize
4KB

Download
memory/2104-40-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2104-37-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2104-36-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2104-35-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2104-32-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2556-21-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2556-20-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2556-22-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2556-24-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2556-19-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2556-42-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2556-46-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2556-44-0x0000000000440000-0x00000000005C1000-memory.dmp

Filesize
1.5MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads