isrstealer | fa426a8fd23a485598b95fdc7a54940438736c35bb753bc8ddf41bcd8f606d46

General

Target

JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe
Size

264KB
MD5

1c7d6b70067537db56b95cf10d8e1ff6
SHA1

501112f132f62f95674cbb43d06e574b70181f19
SHA256

fa426a8fd23a485598b95fdc7a54940438736c35bb753bc8ddf41bcd8f606d46
SHA512

d495df8ede336ba482f6f98e163d5bc0a2a8546012e8dd0717179d21e65dc9407130409a83842b63ef2275d5c162f4c982832d0125ac8efab66c4255bfc3c263
SSDEEP

6144:1b0nSQkLMhvRxYQhShXf/93MUsPft5CPTU0b:pDQvvRKNtRsbh

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 2 IoCs

resource	yara_rule
behavioral1/memory/2068-15-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2068-12-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Loads dropped DLL 3 IoCs

pid	Process
1792	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe
1792	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe
1792	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.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 1792 set thread context of 2068	1792	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	31
PID 2068 set thread context of 2264	2068	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	34

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2264-31-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2264-32-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2264-30-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2264-28-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2264-36-0x0000000000400000-0x0000000000453000-memory.dmp	upx

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_1c7d6b70067537db56b95cf10d8e1ff6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1792	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2068	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1792 wrote to memory of 2068	1792	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	31
PID 1792 wrote to memory of 2068	1792	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	31
PID 1792 wrote to memory of 2068	1792	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	31
PID 1792 wrote to memory of 2068	1792	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	31
PID 1792 wrote to memory of 2068	1792	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	31
PID 1792 wrote to memory of 2068	1792	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	31
PID 1792 wrote to memory of 2068	1792	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	31
PID 1792 wrote to memory of 2068	1792	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	31
PID 1792 wrote to memory of 2928	1792	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	32
PID 1792 wrote to memory of 2928	1792	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	32
PID 1792 wrote to memory of 2928	1792	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	32
PID 1792 wrote to memory of 2928	1792	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	32
PID 2068 wrote to memory of 2264	2068	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	34
PID 2068 wrote to memory of 2264	2068	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	34
PID 2068 wrote to memory of 2264	2068	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	34
PID 2068 wrote to memory of 2264	2068	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	34
PID 2068 wrote to memory of 2264	2068	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	34
PID 2068 wrote to memory of 2264	2068	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	34
PID 2068 wrote to memory of 2264	2068	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	34
PID 2068 wrote to memory of 2264	2068	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	34
PID 2068 wrote to memory of 2264	2068	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	34

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1792
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2068
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\cahgPEuptE.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2264
- C:\Windows\SysWOW64\cmd.exe
  cmd /c C:\Users\Admin\AppData\Local\Temp\DEL.BAT
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2928

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\DEL.BAT

Filesize
43B

MD5
0eb1ce469214ebc99409fa2c14eb1a4f

SHA1
a502e9f691f253ddaac1dd129aad2397b5d536b1

SHA256
6ea933732db88fec7e7c692f6d7b4017a88b511a43da98225260649c37da3a6f

SHA512
ebf7b4b463e38a6f5bf27f5e6cfda9f50e59d38fbb54dd910301d4f7f9b7a28038e51b24985f6357d0707ba521606f9487aabee4a6825e4d56b30900679686e5

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

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
\Users\Admin\AppData\Local\Temp\CACAO.dll

Filesize
19KB

MD5
bbb1886d7d3f8282b880fbb970b886ab

SHA1
f7d4deb9454cb39e4eada63a7851e743dfcaa985

SHA256
52f41760c0088b26df8e7d85c2b3b63a9d0afdd1cc21e05d3b922007a27d933a

SHA512
e27d328b256bd22379b9942e2bf2076a07f45463345529382cd8caf09f9af7098128deae418093a2317d561fa1e20fbadf7cbee5e5f4e836985d26a4c9881b93

Download Submit
memory/1792-0-0x0000000074671000-0x0000000074672000-memory.dmp

Filesize
4KB

Download
memory/1792-1-0x0000000074670000-0x0000000074C1B000-memory.dmp

Filesize
5.7MB

Download
memory/1792-2-0x0000000074670000-0x0000000074C1B000-memory.dmp

Filesize
5.7MB

Download
memory/1792-27-0x0000000074670000-0x0000000074C1B000-memory.dmp

Filesize
5.7MB

Download
memory/2068-11-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2068-12-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2068-15-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2068-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2068-10-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2264-31-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2264-32-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2264-30-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2264-28-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2264-36-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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