isrstealer | 3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20

Analysis

max time kernel
64s
max time network
34s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
28/11/2022, 16:26

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General

Target

3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe
Size

405KB
MD5

b76b66e61a86b4708d164f16a587b7eb
SHA1

002d8fc45341c61238d00136059aa64eaef44d22
SHA256

3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20
SHA512

bc47f19345908ad06679e4bf729eb623b15173079a0f828f62de2be1c5ae6ab21cde0633baf93db237e6e91085e508f29c3acddd7fbfc2fe7b8d333adccfc9ff
SSDEEP

6144:2UwHuNnp2M8TJCJkI/Y8PJw1nQ5orsV7qsmgFB/pAeEURLHcc04TU:rt2M8Tln3wYsmgFh8UFK1

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/920-59-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/920-61-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/920-62-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/920-70-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/920-78-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/920-79-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/932-76-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/932-77-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/932-80-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral1/memory/932-76-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/932-77-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/932-80-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/932-71-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/932-75-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/932-76-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/932-77-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/932-80-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	RegSvcs.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 564 set thread context of 920	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	30
PID 920 set thread context of 1704	920	RegSvcs.exe	31
PID 920 set thread context of 932	920	RegSvcs.exe	32

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe
564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
920	RegSvcs.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 564 wrote to memory of 924	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	29
PID 564 wrote to memory of 924	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	29
PID 564 wrote to memory of 924	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	29
PID 564 wrote to memory of 924	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	29
PID 564 wrote to memory of 924	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	29
PID 564 wrote to memory of 924	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	29
PID 564 wrote to memory of 924	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	29
PID 564 wrote to memory of 920	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	30
PID 564 wrote to memory of 920	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	30
PID 564 wrote to memory of 920	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	30
PID 564 wrote to memory of 920	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	30
PID 564 wrote to memory of 920	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	30
PID 564 wrote to memory of 920	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	30
PID 564 wrote to memory of 920	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	30
PID 564 wrote to memory of 920	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	30
PID 564 wrote to memory of 920	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	30
PID 564 wrote to memory of 920	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	30
PID 564 wrote to memory of 920	564	3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe	30
PID 920 wrote to memory of 1704	920	RegSvcs.exe	31
PID 920 wrote to memory of 1704	920	RegSvcs.exe	31
PID 920 wrote to memory of 1704	920	RegSvcs.exe	31
PID 920 wrote to memory of 1704	920	RegSvcs.exe	31
PID 920 wrote to memory of 1704	920	RegSvcs.exe	31
PID 920 wrote to memory of 1704	920	RegSvcs.exe	31
PID 920 wrote to memory of 1704	920	RegSvcs.exe	31
PID 920 wrote to memory of 1704	920	RegSvcs.exe	31
PID 920 wrote to memory of 1704	920	RegSvcs.exe	31
PID 920 wrote to memory of 1704	920	RegSvcs.exe	31
PID 920 wrote to memory of 1704	920	RegSvcs.exe	31
PID 920 wrote to memory of 1704	920	RegSvcs.exe	31
PID 920 wrote to memory of 932	920	RegSvcs.exe	32
PID 920 wrote to memory of 932	920	RegSvcs.exe	32
PID 920 wrote to memory of 932	920	RegSvcs.exe	32
PID 920 wrote to memory of 932	920	RegSvcs.exe	32
PID 920 wrote to memory of 932	920	RegSvcs.exe	32
PID 920 wrote to memory of 932	920	RegSvcs.exe	32
PID 920 wrote to memory of 932	920	RegSvcs.exe	32
PID 920 wrote to memory of 932	920	RegSvcs.exe	32
PID 920 wrote to memory of 932	920	RegSvcs.exe	32
PID 920 wrote to memory of 932	920	RegSvcs.exe	32
PID 920 wrote to memory of 932	920	RegSvcs.exe	32
PID 920 wrote to memory of 932	920	RegSvcs.exe	32

C:\Users\Admin\AppData\Local\Temp\3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe
"C:\Users\Admin\AppData\Local\Temp\3ad42d527ed36160a80d57c9619b3b0f55fd20cc23c08637f732846cd8aa0c20.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:564
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe"
  2⤵
  PID:924
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:920
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\kmKAtsgLo4.ini"
    3⤵
    PID:1704
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\8soRWkNX7a.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:932

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/564-57-0x0000000074300000-0x00000000748AB000-memory.dmp

Filesize
5.7MB

Download
memory/564-69-0x0000000074300000-0x00000000748AB000-memory.dmp

Filesize
5.7MB

Download
memory/564-54-0x0000000075D01000-0x0000000075D03000-memory.dmp

Filesize
8KB

Download
memory/920-59-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/920-56-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/920-61-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/920-79-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/920-55-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/920-70-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/920-78-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/932-76-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/932-75-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/932-77-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/932-71-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/932-80-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download