isrstealer | 21672e9ee166486552480510adbeab4b75227cc871bcfc38101906f43e1e2f37

General

Target

7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe
Size

328KB
MD5

7079e75991ff532753e2cee6431a2414
SHA1

381794e38330681a0f4da8376c7d8fe3de625149
SHA256

21672e9ee166486552480510adbeab4b75227cc871bcfc38101906f43e1e2f37
SHA512

ade51bb7a9974a33dc7e7065890fce8600c00cc81e73f2ff19c03fc9550a26cb03ebd31bbec8155379135e7df63e31ae2e68397e347d3a313b502d03f237a994
SSDEEP

6144:2b5+2XWXyU4q9o1kS/S6hxwMjedwwXM7s9edXZnhs8YGfB1:242GWsoyRWjOw7ssdll

Score

10^/10

isrstealer credential_access 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
behavioral2/memory/760-4-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/760-6-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/760-28-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003
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 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2424-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2424-14-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2424-15-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2424-16-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2424-18-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 624 set thread context of 760	624	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe	86
PID 760 set thread context of 2424	760	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe	87

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	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
624	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe
760	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 624 wrote to memory of 760	624	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe	86
PID 624 wrote to memory of 760	624	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe	86
PID 624 wrote to memory of 760	624	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe	86
PID 624 wrote to memory of 760	624	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe	86
PID 624 wrote to memory of 760	624	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe	86
PID 624 wrote to memory of 760	624	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe	86
PID 624 wrote to memory of 760	624	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe	86
PID 624 wrote to memory of 760	624	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe	86
PID 760 wrote to memory of 2424	760	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe	87
PID 760 wrote to memory of 2424	760	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe	87
PID 760 wrote to memory of 2424	760	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe	87
PID 760 wrote to memory of 2424	760	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe	87
PID 760 wrote to memory of 2424	760	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe	87
PID 760 wrote to memory of 2424	760	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe	87
PID 760 wrote to memory of 2424	760	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe	87
PID 760 wrote to memory of 2424	760	7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe	87

C:\Users\Admin\AppData\Local\Temp\7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:624
- C:\Users\Admin\AppData\Local\Temp\7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:760
- - C:\Users\Admin\AppData\Local\Temp\7079e75991ff532753e2cee6431a2414_JaffaCakes118.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\q4jAJRUNMV.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2424

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\q4jAJRUNMV.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/624-0-0x0000000000400000-0x00000000004A3000-memory.dmp

Filesize
652KB

Download
memory/624-1-0x00000000001C0000-0x00000000001C3000-memory.dmp

Filesize
12KB

Download
memory/624-10-0x0000000000400000-0x00000000004A3000-memory.dmp

Filesize
652KB

Download
memory/760-4-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/760-6-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/760-28-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2424-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2424-14-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2424-15-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2424-16-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2424-18-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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