isrstealer | 6bf8fa7d649b794a5d29ba022104117628948061fb6b7d07e2930ed8171be8b5

General

Target

1f4e571f8d420ff455efecde40a5e5c6_JaffaCakes118.exe
Size

326KB
MD5

1f4e571f8d420ff455efecde40a5e5c6
SHA1

e8838441fdd255089a0f509f4359c22d3e1efacb
SHA256

6bf8fa7d649b794a5d29ba022104117628948061fb6b7d07e2930ed8171be8b5
SHA512

c46e076d8ec33ed9544a6dac5486ca8309a953aec722ccb9ca102b88b8e0bf931e5d4e0f320ba761a17aefddaab5144cc85bae4db002ec08a450c2ccd8af2896
SSDEEP

6144:vtYldB7BsYf+Imq1v2BFRFl/kueRW/HP5XoOrQSMt6ZDNvc8L9DhqpwcLT1SQiik:ITBLmMv2BFR7+wHP9PE6ZC8L9D4pBTEx

Score

10^/10

isrstealer 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

Processes:

resource	yara_rule
behavioral1/memory/1084-2-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral1/memory/1084-18-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer

UPX packed file 6 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1208-8-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1208-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1208-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1208-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1208-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1208-17-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 2 IoCs

Processes:

1f4e571f8d420ff455efecde40a5e5c6_JaffaCakes118.exevbc.exe

description	pid	process	target process
PID 2240 set thread context of 1084	2240	1f4e571f8d420ff455efecde40a5e5c6_JaffaCakes118.exe	vbc.exe
PID 1084 set thread context of 1208	1084	vbc.exe	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

1084 vbc.exe

pid	process
1084	vbc.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

1f4e571f8d420ff455efecde40a5e5c6_JaffaCakes118.exevbc.exe

description	pid	process	target process
PID 2240 wrote to memory of 1084	2240	1f4e571f8d420ff455efecde40a5e5c6_JaffaCakes118.exe	vbc.exe
PID 2240 wrote to memory of 1084	2240	1f4e571f8d420ff455efecde40a5e5c6_JaffaCakes118.exe	vbc.exe
PID 2240 wrote to memory of 1084	2240	1f4e571f8d420ff455efecde40a5e5c6_JaffaCakes118.exe	vbc.exe
PID 2240 wrote to memory of 1084	2240	1f4e571f8d420ff455efecde40a5e5c6_JaffaCakes118.exe	vbc.exe
PID 2240 wrote to memory of 1084	2240	1f4e571f8d420ff455efecde40a5e5c6_JaffaCakes118.exe	vbc.exe
PID 2240 wrote to memory of 1084	2240	1f4e571f8d420ff455efecde40a5e5c6_JaffaCakes118.exe	vbc.exe
PID 2240 wrote to memory of 1084	2240	1f4e571f8d420ff455efecde40a5e5c6_JaffaCakes118.exe	vbc.exe
PID 2240 wrote to memory of 1084	2240	1f4e571f8d420ff455efecde40a5e5c6_JaffaCakes118.exe	vbc.exe
PID 2240 wrote to memory of 1084	2240	1f4e571f8d420ff455efecde40a5e5c6_JaffaCakes118.exe	vbc.exe
PID 1084 wrote to memory of 1208	1084	vbc.exe	vbc.exe
PID 1084 wrote to memory of 1208	1084	vbc.exe	vbc.exe
PID 1084 wrote to memory of 1208	1084	vbc.exe	vbc.exe
PID 1084 wrote to memory of 1208	1084	vbc.exe	vbc.exe
PID 1084 wrote to memory of 1208	1084	vbc.exe	vbc.exe
PID 1084 wrote to memory of 1208	1084	vbc.exe	vbc.exe
PID 1084 wrote to memory of 1208	1084	vbc.exe	vbc.exe
PID 1084 wrote to memory of 1208	1084	vbc.exe	vbc.exe
PID 1084 wrote to memory of 1208	1084	vbc.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\1f4e571f8d420ff455efecde40a5e5c6_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\1f4e571f8d420ff455efecde40a5e5c6_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2240
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1084
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    PID:1208

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

1

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1084-2-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1084-18-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1208-8-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1208-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1208-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1208-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1208-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1208-17-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1208-15-0x0000000000460000-0x00000000004C7000-memory.dmp

Filesize
412KB

Download
memory/2240-0-0x0000000074C51000-0x0000000074C52000-memory.dmp

Filesize
4KB

Download
memory/2240-1-0x0000000074C50000-0x00000000751FB000-memory.dmp

Filesize
5.7MB

Download
memory/2240-5-0x0000000074C50000-0x00000000751FB000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads