isrstealer | 99a1d6445f22f2466146061d6fbbd42e81bdd91c09a8a397d0c10efbf00c5d51

General

Target

0f85ffb3e96f5d3140a1274224dc045a_JaffaCakes118.exe
Size

1.0MB
MD5

0f85ffb3e96f5d3140a1274224dc045a
SHA1

9faf044221f1ae89b82e2ac6902a442e942837b0
SHA256

99a1d6445f22f2466146061d6fbbd42e81bdd91c09a8a397d0c10efbf00c5d51
SHA512

e46579d33499a5518ff9beb771baa3100546e3ab615e6a4afa3a8278de5fcbf196d01b5f5c8cb683296e34ffdfbd94a8aaf220d5a060eb0b43c2e5ecb4978390
SSDEEP

24576:pRmJkcoQricOIQxiZY1iaT/NvDAFEpEMuoKqRSzRxAFyro1:mJZoQrbTFZY1iaTZEWpEMbBSzzAso1

Score

10^/10

isrstealer discovery 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
behavioral2/memory/4608-8-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/4608-10-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/4608-26-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/4608-27-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4624 set thread context of 4608	4624	0f85ffb3e96f5d3140a1274224dc045a_JaffaCakes118.exe	82
PID 4608 set thread context of 4540	4608	calc.exe	83

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4540-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4540-16-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4540-15-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4540-17-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4540-19-0x0000000000400000-0x0000000000453000-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 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	0f85ffb3e96f5d3140a1274224dc045a_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	calc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	calc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4608	calc.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 4624 wrote to memory of 4608	4624	0f85ffb3e96f5d3140a1274224dc045a_JaffaCakes118.exe	82
PID 4624 wrote to memory of 4608	4624	0f85ffb3e96f5d3140a1274224dc045a_JaffaCakes118.exe	82
PID 4624 wrote to memory of 4608	4624	0f85ffb3e96f5d3140a1274224dc045a_JaffaCakes118.exe	82
PID 4624 wrote to memory of 4608	4624	0f85ffb3e96f5d3140a1274224dc045a_JaffaCakes118.exe	82
PID 4624 wrote to memory of 4608	4624	0f85ffb3e96f5d3140a1274224dc045a_JaffaCakes118.exe	82
PID 4608 wrote to memory of 4540	4608	calc.exe	83
PID 4608 wrote to memory of 4540	4608	calc.exe	83
PID 4608 wrote to memory of 4540	4608	calc.exe	83
PID 4608 wrote to memory of 4540	4608	calc.exe	83
PID 4608 wrote to memory of 4540	4608	calc.exe	83
PID 4608 wrote to memory of 4540	4608	calc.exe	83
PID 4608 wrote to memory of 4540	4608	calc.exe	83
PID 4608 wrote to memory of 4540	4608	calc.exe	83

C:\Users\Admin\AppData\Local\Temp\0f85ffb3e96f5d3140a1274224dc045a_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\0f85ffb3e96f5d3140a1274224dc045a_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4624
- C:\Windows\SysWOW64\calc.exe
  "C:\Windows\SysWOW64\calc.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4608
- - C:\Windows\SysWOW64\calc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\WjXLu65wXC.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4540

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\WjXLu65wXC.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
C:\Users\Admin\AppData\Local\Temp\aut7B2B.tmp

Filesize
208KB

MD5
26fb22b88d35d1d75cdfc7b108a85f90

SHA1
e8108fa0e25be6355546abf9feff6c6db441698c

SHA256
1845099048f98cce48128646608b47ed72cf8517eb738db8794d6e99cc2c3a74

SHA512
f349e295de80a0b99068b99832f64492d70c91b13d2f26236901d6bd77981c6929b83351b7a8ebc3fb14e525e3aa2274b05b7b3504463eb54b4875735c0ec5ca

Download Submit
memory/4540-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4540-16-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4540-15-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4540-17-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4540-19-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4608-8-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/4608-10-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/4608-26-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/4608-27-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download

Analysis

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