isrstealer | aec7476b3cc5d23fc8f8652a6255bf652cc03fd985b6de9faa1875103e12bd4d

General

Target

JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe
Size

632KB
MD5

7e290b3489400c6e501962cdbbdcdea9
SHA1

d338e6f06d482d6486a113d4115c90b531c088dd
SHA256

aec7476b3cc5d23fc8f8652a6255bf652cc03fd985b6de9faa1875103e12bd4d
SHA512

70fe2292609d6db16b99a28593e1a2c98af3847fb7d57ef64b6ac4b26572361b7b870a1f3f5316e768b740cd5dbff230e5eda91cb2d0beb87ba13afa69afff4e
SSDEEP

12288:7yt+isUdgcRFOvNs534CqdqZfHSVl3fe:7TVUdgcRYaOSyVNf

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 3 IoCs

resource	yara_rule
behavioral1/memory/2380-15-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral1/memory/2380-12-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral1/memory/2380-35-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Executes dropped EXE 2 IoCs

pid	Process
2380	Service.exe
2216	Service.exe

Loads dropped DLL 2 IoCs

pid	Process
976	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe
2380	Service.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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 976 set thread context of 2380	976	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe	31
PID 2380 set thread context of 2216	2380	Service.exe	32

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2216-23-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2216-29-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2216-28-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2216-27-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2216-26-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2216-34-0x0000000000400000-0x0000000000453000-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	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Service.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Service.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
976	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	976	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2380	Service.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 976 wrote to memory of 2380	976	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe	31
PID 976 wrote to memory of 2380	976	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe	31
PID 976 wrote to memory of 2380	976	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe	31
PID 976 wrote to memory of 2380	976	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe	31
PID 976 wrote to memory of 2380	976	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe	31
PID 976 wrote to memory of 2380	976	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe	31
PID 976 wrote to memory of 2380	976	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe	31
PID 976 wrote to memory of 2380	976	JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe	31
PID 2380 wrote to memory of 2216	2380	Service.exe	32
PID 2380 wrote to memory of 2216	2380	Service.exe	32
PID 2380 wrote to memory of 2216	2380	Service.exe	32
PID 2380 wrote to memory of 2216	2380	Service.exe	32
PID 2380 wrote to memory of 2216	2380	Service.exe	32
PID 2380 wrote to memory of 2216	2380	Service.exe	32
PID 2380 wrote to memory of 2216	2380	Service.exe	32
PID 2380 wrote to memory of 2216	2380	Service.exe	32
PID 2380 wrote to memory of 2216	2380	Service.exe	32

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7e290b3489400c6e501962cdbbdcdea9.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:976
- C:\Users\Admin\AppData\Local\Temp\AppLaunch\Service.exe
  C:\Users\Admin\AppData\Local\Temp\\AppLaunch\Service.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:2380
- - C:\Users\Admin\AppData\Local\Temp\AppLaunch\Service.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2216

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

\Users\Admin\AppData\Local\Temp\AppLaunch\Service.exe

Filesize
1.1MB

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

Download Submit
memory/976-0-0x0000000074F91000-0x0000000074F92000-memory.dmp

Filesize
4KB

Download
memory/976-1-0x0000000074F90000-0x000000007553B000-memory.dmp

Filesize
5.7MB

Download
memory/976-2-0x0000000074F90000-0x000000007553B000-memory.dmp

Filesize
5.7MB

Download
memory/976-3-0x0000000074F90000-0x000000007553B000-memory.dmp

Filesize
5.7MB

Download
memory/976-30-0x0000000074F90000-0x000000007553B000-memory.dmp

Filesize
5.7MB

Download
memory/2216-28-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2216-23-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2216-29-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2216-27-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2216-26-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2216-34-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2380-15-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2380-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2380-12-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2380-11-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2380-10-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2380-35-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download

Analysis

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