isrstealer | 10d767f0c54a1570faf75d506505d861d0871e0d7fa2fd6a035fc434bc7f9cef

General

Target

10d767f0c54a1570faf75d506505d861d0871e0d7fa2fd6a035fc434bc7f9cef.exe
Size

308KB
MD5

5002e89c367271d6bd5d00440561d47d
SHA1

5ea5f809772bbc189e9876a3f0ece67b0d169251
SHA256

10d767f0c54a1570faf75d506505d861d0871e0d7fa2fd6a035fc434bc7f9cef
SHA512

dd555aa6a914739f79b67b5b51d2ebc5f8fb659b9ccaba1faafc4a24ba11c415a1d0073a16ab0254892984c285a0d360d57353380ac875353d67d842f6ef980f
SSDEEP

6144:8q491F80mlLIGLSoDBUdLifi3J164MEmEzrsw7mulAdNqz4f:8v9C9VhSLn1Tm4rswsqU

Score

10^/10

isrstealer collection 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 6 IoCs

resource	yara_rule
behavioral1/memory/1384-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1384-62-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1384-63-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1384-74-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1384-82-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1384-86-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2016-81-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/2016-83-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/2016-85-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral1/memory/2016-81-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/2016-83-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/2016-85-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2044-68-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2044-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2044-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2044-75-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2016-76-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2016-80-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2016-81-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2016-83-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2044-84-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2016-85-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	vbc.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1968 set thread context of 1384	1968	10d767f0c54a1570faf75d506505d861d0871e0d7fa2fd6a035fc434bc7f9cef.exe	28
PID 1384 set thread context of 2044	1384	vbc.exe	29
PID 1384 set thread context of 2016	1384	vbc.exe	30

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1968	10d767f0c54a1570faf75d506505d861d0871e0d7fa2fd6a035fc434bc7f9cef.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1384	vbc.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1968 wrote to memory of 1384	1968	10d767f0c54a1570faf75d506505d861d0871e0d7fa2fd6a035fc434bc7f9cef.exe	28
PID 1968 wrote to memory of 1384	1968	10d767f0c54a1570faf75d506505d861d0871e0d7fa2fd6a035fc434bc7f9cef.exe	28
PID 1968 wrote to memory of 1384	1968	10d767f0c54a1570faf75d506505d861d0871e0d7fa2fd6a035fc434bc7f9cef.exe	28
PID 1968 wrote to memory of 1384	1968	10d767f0c54a1570faf75d506505d861d0871e0d7fa2fd6a035fc434bc7f9cef.exe	28
PID 1968 wrote to memory of 1384	1968	10d767f0c54a1570faf75d506505d861d0871e0d7fa2fd6a035fc434bc7f9cef.exe	28
PID 1968 wrote to memory of 1384	1968	10d767f0c54a1570faf75d506505d861d0871e0d7fa2fd6a035fc434bc7f9cef.exe	28
PID 1968 wrote to memory of 1384	1968	10d767f0c54a1570faf75d506505d861d0871e0d7fa2fd6a035fc434bc7f9cef.exe	28
PID 1968 wrote to memory of 1384	1968	10d767f0c54a1570faf75d506505d861d0871e0d7fa2fd6a035fc434bc7f9cef.exe	28
PID 1384 wrote to memory of 2044	1384	vbc.exe	29
PID 1384 wrote to memory of 2044	1384	vbc.exe	29
PID 1384 wrote to memory of 2044	1384	vbc.exe	29
PID 1384 wrote to memory of 2044	1384	vbc.exe	29
PID 1384 wrote to memory of 2044	1384	vbc.exe	29
PID 1384 wrote to memory of 2044	1384	vbc.exe	29
PID 1384 wrote to memory of 2044	1384	vbc.exe	29
PID 1384 wrote to memory of 2044	1384	vbc.exe	29
PID 1384 wrote to memory of 2044	1384	vbc.exe	29
PID 1384 wrote to memory of 2016	1384	vbc.exe	30
PID 1384 wrote to memory of 2016	1384	vbc.exe	30
PID 1384 wrote to memory of 2016	1384	vbc.exe	30
PID 1384 wrote to memory of 2016	1384	vbc.exe	30
PID 1384 wrote to memory of 2016	1384	vbc.exe	30
PID 1384 wrote to memory of 2016	1384	vbc.exe	30
PID 1384 wrote to memory of 2016	1384	vbc.exe	30
PID 1384 wrote to memory of 2016	1384	vbc.exe	30
PID 1384 wrote to memory of 2016	1384	vbc.exe	30

C:\Users\Admin\AppData\Local\Temp\10d767f0c54a1570faf75d506505d861d0871e0d7fa2fd6a035fc434bc7f9cef.exe
"C:\Users\Admin\AppData\Local\Temp\10d767f0c54a1570faf75d506505d861d0871e0d7fa2fd6a035fc434bc7f9cef.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1968
- 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:1384
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\nIiBHO6JLB.ini"
    3⤵
    PID:2044
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\06ccDzayXA.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:2016

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1384-74-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1384-57-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1384-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1384-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1384-62-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1384-86-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1384-82-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1968-55-0x0000000073E20000-0x00000000743CB000-memory.dmp

Filesize
5.7MB

Download
memory/1968-56-0x0000000073E20000-0x00000000743CB000-memory.dmp

Filesize
5.7MB

Download
memory/1968-66-0x0000000073E20000-0x00000000743CB000-memory.dmp

Filesize
5.7MB

Download
memory/1968-54-0x0000000074AB1000-0x0000000074AB3000-memory.dmp

Filesize
8KB

Download
memory/2016-81-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2016-76-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2016-80-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2016-83-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2016-85-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2044-75-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2044-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2044-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2044-68-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2044-84-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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