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 stealer trojan

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
behavioral2/memory/1676-12-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/1676-16-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Loads dropped DLL 4 IoCs

pid	Process
220	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe
220	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe
220	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe
220	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 220 set thread context of 1676	220	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	86
PID 1676 set thread context of 3524	1676	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	89

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2168	3524	WerFault.exe	89

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

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	220	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1676	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 220 wrote to memory of 1676	220	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	86
PID 220 wrote to memory of 1676	220	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	86
PID 220 wrote to memory of 1676	220	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	86
PID 220 wrote to memory of 1676	220	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	86
PID 220 wrote to memory of 1676	220	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	86
PID 220 wrote to memory of 1676	220	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	86
PID 220 wrote to memory of 1676	220	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	86
PID 220 wrote to memory of 1676	220	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	86
PID 220 wrote to memory of 4244	220	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	87
PID 220 wrote to memory of 4244	220	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	87
PID 220 wrote to memory of 4244	220	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	87
PID 1676 wrote to memory of 3524	1676	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	89
PID 1676 wrote to memory of 3524	1676	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	89
PID 1676 wrote to memory of 3524	1676	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	89
PID 1676 wrote to memory of 3524	1676	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	89
PID 1676 wrote to memory of 3524	1676	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	89
PID 1676 wrote to memory of 3524	1676	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	89
PID 1676 wrote to memory of 3524	1676	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	89
PID 1676 wrote to memory of 3524	1676	JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe	89

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:220
- 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:1676
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1c7d6b70067537db56b95cf10d8e1ff6.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\W3ZCUykCA9.ini"
    3⤵
    PID:3524
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3524 -s 80
      4⤵
      Program crash
      PID:2168
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\DEL.BAT
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4244

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 3524 -ip 3524
1⤵
PID:528

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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\CACAO.dll

Filesize
19KB

MD5
bbb1886d7d3f8282b880fbb970b886ab

SHA1
f7d4deb9454cb39e4eada63a7851e743dfcaa985

SHA256
52f41760c0088b26df8e7d85c2b3b63a9d0afdd1cc21e05d3b922007a27d933a

SHA512
e27d328b256bd22379b9942e2bf2076a07f45463345529382cd8caf09f9af7098128deae418093a2317d561fa1e20fbadf7cbee5e5f4e836985d26a4c9881b93

Download Submit
C:\Users\Admin\AppData\Local\Temp\DEL.BAT

Filesize
43B

MD5
0eb1ce469214ebc99409fa2c14eb1a4f

SHA1
a502e9f691f253ddaac1dd129aad2397b5d536b1

SHA256
6ea933732db88fec7e7c692f6d7b4017a88b511a43da98225260649c37da3a6f

SHA512
ebf7b4b463e38a6f5bf27f5e6cfda9f50e59d38fbb54dd910301d4f7f9b7a28038e51b24985f6357d0707ba521606f9487aabee4a6825e4d56b30900679686e5

Download Submit
memory/220-0-0x0000000074A02000-0x0000000074A03000-memory.dmp

Filesize
4KB

Download
memory/220-1-0x0000000074A00000-0x0000000074FB1000-memory.dmp

Filesize
5.7MB

Download
memory/220-2-0x0000000074A00000-0x0000000074FB1000-memory.dmp

Filesize
5.7MB

Download
memory/220-20-0x0000000074A00000-0x0000000074FB1000-memory.dmp

Filesize
5.7MB

Download
memory/1676-12-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1676-16-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download

Analysis

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