isrstealer | 1641c4fdceed245cae1d54d5818a3762dc33e12e37390ef6eb9fea784d7478be

General

Target

2d8c1ee5a68ea7a0f99f922fb77f324b_JaffaCakes118.exe
Size

4.1MB
MD5

2d8c1ee5a68ea7a0f99f922fb77f324b
SHA1

175ceba8955b52395459686277aa2b518cbfb6ed
SHA256

1641c4fdceed245cae1d54d5818a3762dc33e12e37390ef6eb9fea784d7478be
SHA512

d64d00baf228ac067c9f26d3da3a916a51c38e052d8afeac38b037d9740608e4a1a885cb19cb2bc42dd7c10e62f1631e7f773c3dd5a28e25387d0297b5943135
SSDEEP

6144:7/m9kF4LhB959Ak24Fa8yVRasuSuvfQ1dskAsaJraBCDorAB:bfFWB9bpFatVMPfgsVpraB

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 4 IoCs

resource	yara_rule
behavioral2/memory/3616-3-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/3616-5-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/3616-20-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/3616-24-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2753856825-3907105642-1818461144-1000\Control Panel\International\Geo\Nation	2d8c1ee5a68ea7a0f99f922fb77f324b_JaffaCakes118.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/372-8-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/372-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/372-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/372-16-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/372-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/372-22-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4824 set thread context of 3616	4824	2d8c1ee5a68ea7a0f99f922fb77f324b_JaffaCakes118.exe	84
PID 3616 set thread context of 372	3616	vbc.exe	86

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2832	PING.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3616	vbc.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 4824 wrote to memory of 3616	4824	2d8c1ee5a68ea7a0f99f922fb77f324b_JaffaCakes118.exe	84
PID 4824 wrote to memory of 3616	4824	2d8c1ee5a68ea7a0f99f922fb77f324b_JaffaCakes118.exe	84
PID 4824 wrote to memory of 3616	4824	2d8c1ee5a68ea7a0f99f922fb77f324b_JaffaCakes118.exe	84
PID 4824 wrote to memory of 3616	4824	2d8c1ee5a68ea7a0f99f922fb77f324b_JaffaCakes118.exe	84
PID 4824 wrote to memory of 3616	4824	2d8c1ee5a68ea7a0f99f922fb77f324b_JaffaCakes118.exe	84
PID 4824 wrote to memory of 3616	4824	2d8c1ee5a68ea7a0f99f922fb77f324b_JaffaCakes118.exe	84
PID 4824 wrote to memory of 3616	4824	2d8c1ee5a68ea7a0f99f922fb77f324b_JaffaCakes118.exe	84
PID 4824 wrote to memory of 3616	4824	2d8c1ee5a68ea7a0f99f922fb77f324b_JaffaCakes118.exe	84
PID 3616 wrote to memory of 372	3616	vbc.exe	86
PID 3616 wrote to memory of 372	3616	vbc.exe	86
PID 3616 wrote to memory of 372	3616	vbc.exe	86
PID 3616 wrote to memory of 372	3616	vbc.exe	86
PID 3616 wrote to memory of 372	3616	vbc.exe	86
PID 3616 wrote to memory of 372	3616	vbc.exe	86
PID 3616 wrote to memory of 372	3616	vbc.exe	86
PID 3616 wrote to memory of 372	3616	vbc.exe	86
PID 4824 wrote to memory of 3204	4824	2d8c1ee5a68ea7a0f99f922fb77f324b_JaffaCakes118.exe	87
PID 4824 wrote to memory of 3204	4824	2d8c1ee5a68ea7a0f99f922fb77f324b_JaffaCakes118.exe	87
PID 4824 wrote to memory of 3204	4824	2d8c1ee5a68ea7a0f99f922fb77f324b_JaffaCakes118.exe	87
PID 3204 wrote to memory of 2832	3204	cmd.exe	89
PID 3204 wrote to memory of 2832	3204	cmd.exe	89
PID 3204 wrote to memory of 2832	3204	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\2d8c1ee5a68ea7a0f99f922fb77f324b_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\2d8c1ee5a68ea7a0f99f922fb77f324b_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4824
- 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:3616
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\epoiBHc5zJ.ini"
    3⤵
    PID:372
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C ping 1.1.1.1 -n 1 -w 1000 > Nul & Del "C:\Users\Admin\AppData\Local\Temp\2d8c1ee5a68ea7a0f99f922fb77f324b_JaffaCakes118.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3204
- - C:\Windows\SysWOW64\PING.EXE
    ping 1.1.1.1 -n 1 -w 1000
    3⤵
    - Runs ping.exe
    PID:2832

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

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\epoiBHc5zJ.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/372-16-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/372-14-0x0000000000460000-0x0000000000529000-memory.dmp

Filesize
804KB

Download
memory/372-22-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/372-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/372-8-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/372-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/372-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3616-5-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3616-20-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3616-3-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3616-24-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/4824-0-0x0000000074AC2000-0x0000000074AC3000-memory.dmp

Filesize
4KB

Download
memory/4824-2-0x0000000074AC0000-0x0000000075071000-memory.dmp

Filesize
5.7MB

Download
memory/4824-18-0x0000000074AC0000-0x0000000075071000-memory.dmp

Filesize
5.7MB

Download
memory/4824-1-0x0000000074AC0000-0x0000000075071000-memory.dmp

Filesize
5.7MB

Download

Analysis

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