isrstealer | a9d2ebf7bc8bdc2c212638ca842c68eb4c9eaa0d89fe95799789c2cf8e52bf02

General

Target

4e6c641844c91b9c68eff78e7c4d746e_JaffaCakes118.exe
Size

580KB
MD5

4e6c641844c91b9c68eff78e7c4d746e
SHA1

98275a43da5627963942bf3620d7f2030878626a
SHA256

a9d2ebf7bc8bdc2c212638ca842c68eb4c9eaa0d89fe95799789c2cf8e52bf02
SHA512

bc64491e68d27100059de2b1e01bbcba715ea4e6b708856eb2d01ff21b26d0b3bd6f6a607f386779e4066878dcfc4b8252c1c187544bb599b8501de02b74a1df
SSDEEP

12288:k29u/69tDk5vHyZsHhRZak726G7fvwewLJlpK2myD743GfGsv+9oazR6+u6xIRxd:k2AWtpcE7Deg4MWe

Score

10^/10

isrstealer 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 1 IoCs

resource	yara_rule
behavioral1/files/0x00080000000120fb-6.dat	family_isrstealer

Executes dropped EXE 2 IoCs

pid	Process
2760	97.exe
2372	97.exe

Loads dropped DLL 1 IoCs

pid	Process
2760	97.exe

Reads user/profile data of web browsers 2 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

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2372-17-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2372-19-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2372-18-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2372-16-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2372-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2372-21-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2760 set thread context of 2372	2760	97.exe	32

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2760	97.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2276 wrote to memory of 2760	2276	4e6c641844c91b9c68eff78e7c4d746e_JaffaCakes118.exe	31
PID 2276 wrote to memory of 2760	2276	4e6c641844c91b9c68eff78e7c4d746e_JaffaCakes118.exe	31
PID 2276 wrote to memory of 2760	2276	4e6c641844c91b9c68eff78e7c4d746e_JaffaCakes118.exe	31
PID 2276 wrote to memory of 2760	2276	4e6c641844c91b9c68eff78e7c4d746e_JaffaCakes118.exe	31
PID 2760 wrote to memory of 2372	2760	97.exe	32
PID 2760 wrote to memory of 2372	2760	97.exe	32
PID 2760 wrote to memory of 2372	2760	97.exe	32
PID 2760 wrote to memory of 2372	2760	97.exe	32
PID 2760 wrote to memory of 2372	2760	97.exe	32
PID 2760 wrote to memory of 2372	2760	97.exe	32
PID 2760 wrote to memory of 2372	2760	97.exe	32
PID 2760 wrote to memory of 2372	2760	97.exe	32
PID 2760 wrote to memory of 2372	2760	97.exe	32

C:\Users\Admin\AppData\Local\Temp\4e6c641844c91b9c68eff78e7c4d746e_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\4e6c641844c91b9c68eff78e7c4d746e_JaffaCakes118.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2276
- C:\Users\Admin\AppData\Local\Temp\97.exe
  C:\Users\Admin\AppData\Local\Temp\97.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2760
- - C:\Users\Admin\AppData\Local\Temp\97.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\JouIp35Gby.ini"
    3⤵
    - Executes dropped EXE
    PID:2372

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

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\97.exe

Filesize
208KB

MD5
78f3d2ca47b53f4007bedc701fc7db99

SHA1
ec4b31f466afd849d2e8c1e6a0b5934ab3696f94

SHA256
df2f186ec0bdac75006aa8ed09bed169bc8bce66469869e2341bc24b4a4bbaab

SHA512
34fcc55d2872269cfdf659a24b1adfb8174290dc2b00ab170782a92e243c8ff016d63e3916604618609d271d95c49bb47bfb3dbb0a7905c09312337c7f31db53

Download Submit
C:\Users\Admin\AppData\Local\Temp\JouIp35Gby.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2276-0-0x000007FEF584E000-0x000007FEF584F000-memory.dmp

Filesize
4KB

Download
memory/2276-14-0x000007FEF5590000-0x000007FEF5F2D000-memory.dmp

Filesize
9.6MB

Download
memory/2276-9-0x000007FEF5590000-0x000007FEF5F2D000-memory.dmp

Filesize
9.6MB

Download
memory/2276-24-0x000007FEF5590000-0x000007FEF5F2D000-memory.dmp

Filesize
9.6MB

Download
memory/2372-17-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2372-19-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2372-18-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2372-16-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2372-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2372-21-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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