e51d5a34e88b31078df596dfc8a162c2cd2a0d4e3d3e8228301e3cec9f88d22c

Analysis

max time kernel
75s
max time network
136s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
06/05/2022, 08:41

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General

Target
e51d5a34e88b31078df596dfc8a162c2cd2a0d4e3d3e8228301e3cec9f88d22c.exe
Size 12.0MB
Sample220506-klen9acdbj
SHA256 e51d5a34e88b31078df596dfc8a162c2cd2a0d4e3d3e8228301e3cec9f88d22c
MD5 cf386a47131edcc9adc42de3beaad6e2
SHA1 591d73c1208b14312b18fb7d6b58e1006b1b57b2
SHA512 380fcedea22b0392976c125148b3029902510d67d9f7556cd2498bbcbd1c17bc4bbcddf83871e0a06367aef41539d3910e999677db29c86012e21de6b848a2dd
MD5 SHA1 SHA512

Score

9^/10

discovery evasion spyware stealer themida trojan

Malware Config

Signatures

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Executes dropped EXE 3 IoCs

pid	Process
4268	modest-update.exe
4428	modest-menu.exe
1676	Roaming6CYWXZt78x.exe

Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 4 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	modest-menu.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	modest-menu.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	modest-update.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	modest-update.exe

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-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	e51d5a34e88b31078df596dfc8a162c2cd2a0d4e3d3e8228301e3cec9f88d22c.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Themida packer 6 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/files/0x0009000000022e70-135.dat	themida
behavioral2/files/0x0009000000022e70-134.dat	themida
behavioral2/memory/4428-138-0x00007FF727950000-0x00007FF7294AB000-memory.dmp	themida
behavioral2/memory/4428-141-0x00007FF727950000-0x00007FF7294AB000-memory.dmp	themida
behavioral2/memory/4428-142-0x00007FF727950000-0x00007FF7294AB000-memory.dmp	themida
behavioral2/memory/4428-143-0x00007FF727950000-0x00007FF7294AB000-memory.dmp	themida

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	modest-menu.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	modest-update.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	modest-update.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
4428	modest-menu.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4688	1676	WerFault.exe	91

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
4268	modest-update.exe
4268	modest-update.exe
4268	modest-update.exe
4428	modest-menu.exe
4428	modest-menu.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4268	modest-update.exe
Token: SeDebugPrivilege	1676	Roaming6CYWXZt78x.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 548 wrote to memory of 4268	548	e51d5a34e88b31078df596dfc8a162c2cd2a0d4e3d3e8228301e3cec9f88d22c.exe	83
PID 548 wrote to memory of 4268	548	e51d5a34e88b31078df596dfc8a162c2cd2a0d4e3d3e8228301e3cec9f88d22c.exe	83
PID 548 wrote to memory of 4268	548	e51d5a34e88b31078df596dfc8a162c2cd2a0d4e3d3e8228301e3cec9f88d22c.exe	83
PID 548 wrote to memory of 4428	548	e51d5a34e88b31078df596dfc8a162c2cd2a0d4e3d3e8228301e3cec9f88d22c.exe	85
PID 548 wrote to memory of 4428	548	e51d5a34e88b31078df596dfc8a162c2cd2a0d4e3d3e8228301e3cec9f88d22c.exe	85
PID 4268 wrote to memory of 1676	4268	modest-update.exe	91
PID 4268 wrote to memory of 1676	4268	modest-update.exe	91

C:\Users\Admin\AppData\Local\Temp\e51d5a34e88b31078df596dfc8a162c2cd2a0d4e3d3e8228301e3cec9f88d22c.exe
"C:\Users\Admin\AppData\Local\Temp\e51d5a34e88b31078df596dfc8a162c2cd2a0d4e3d3e8228301e3cec9f88d22c.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:548
- C:\Users\Admin\AppData\Local\Temp\modest-update.exe
  "C:\Users\Admin\AppData\Local\Temp\modest-update.exe"
  2⤵
  - Executes dropped EXE
  - Checks BIOS information in registry
  - Maps connected drives based on registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4268
- - C:\Users\Admin\AppData\Roaming6CYWXZt78x.exe
    "C:\Users\Admin\AppData\Roaming6CYWXZt78x.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1676
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1676 -s 1144
      4⤵
      Program crash
      PID:4688
- C:\Users\Admin\AppData\Local\Temp\modest-menu.exe
  "C:\Users\Admin\AppData\Local\Temp\modest-menu.exe"
  2⤵
  - Executes dropped EXE
  - Checks BIOS information in registry
  - Checks whether UAC is enabled
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious behavior: EnumeratesProcesses
  PID:4428

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 408 -p 1676 -ip 1676
1⤵
PID:4964

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Credentials in Files

T1081

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

modest-menu.exe

Path C:\Users\Admin\AppData\Local\Temp\modest-menu.exe
Size 10.8MB
SHA256 20586c23808706e7bf6cf24a37fb5c30195bc02d595f92e43b78760bc14d7366
MD5 8df943c876b75a51eacc41f008834f4e
SHA1 9b4c89ae6bbc175f20b22a225363f6b2cb4142d5
SHA512 4badeedae553dc1dad172fb9db1425c994693466cc4b2df57d189b4ac4a53828eedc8dd23e0f023570e7ebe7576945e7200205852f885e69fa7a0820d039c56d
SSDEEP 196608:fzQoJOOpzeSHJPQpySE5o4ly7XcF4WaAUNrkh+2aqhK6C5QOsP2:fzQoPpBHxQpmQIF0yh+ZHsO
MD5 SHA1 SHA512 SSDEEP

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modest-menu.exe

Path C:\Users\Admin\AppData\Local\Temp\modest-menu.exe
Size 10.8MB
SHA256 20586c23808706e7bf6cf24a37fb5c30195bc02d595f92e43b78760bc14d7366
MD5 8df943c876b75a51eacc41f008834f4e
SHA1 9b4c89ae6bbc175f20b22a225363f6b2cb4142d5
SHA512 4badeedae553dc1dad172fb9db1425c994693466cc4b2df57d189b4ac4a53828eedc8dd23e0f023570e7ebe7576945e7200205852f885e69fa7a0820d039c56d
SSDEEP 196608:fzQoJOOpzeSHJPQpySE5o4ly7XcF4WaAUNrkh+2aqhK6C5QOsP2:fzQoPpBHxQpmQIF0yh+ZHsO
MD5 SHA1 SHA512 SSDEEP

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modest-update.exe

Path C:\Users\Admin\AppData\Local\Temp\modest-update.exe
Size 1.4MB
SHA256 1b5ae550c7aaa211a5964cded7cf7752400467513a66643076e3723d868afbcb
MD5 ec937b1d49fa6bc932efd714be46b431
SHA1 d4bc787ccd0d409acb39ff0e63be0f6a49bf7436
SHA512 cc6f9e05e3347537e0aec35323c0cf715d16aef7f40665cd1e0a9a37fbba2acbd7540827ebcb61aeacedee7d7e4d6da0d5213ba2d6d47c43be23b6ff984b8b14
SSDEEP 24576:CdZdIWq7xP4vFLvlwSNiYUqwAeVihkisCMBpOrZfvM8LTzca:dVPyhbAVIskt
MD5 SHA1 SHA512 SSDEEP

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modest-update.exe

Path C:\Users\Admin\AppData\Local\Temp\modest-update.exe
Size 1.4MB
SHA256 1b5ae550c7aaa211a5964cded7cf7752400467513a66643076e3723d868afbcb
MD5 ec937b1d49fa6bc932efd714be46b431
SHA1 d4bc787ccd0d409acb39ff0e63be0f6a49bf7436
SHA512 cc6f9e05e3347537e0aec35323c0cf715d16aef7f40665cd1e0a9a37fbba2acbd7540827ebcb61aeacedee7d7e4d6da0d5213ba2d6d47c43be23b6ff984b8b14
SSDEEP 24576:CdZdIWq7xP4vFLvlwSNiYUqwAeVihkisCMBpOrZfvM8LTzca:dVPyhbAVIskt
MD5 SHA1 SHA512 SSDEEP

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Roaming6CYWXZt78x.exe

Path C:\Users\Admin\AppData\Roaming6CYWXZt78x.exe
Size 165KB
SHA256 2b3b33557fe9b753e3c536b913e68b4230772161d83bc2bf00f5f4ef4a37278b
MD5 7c77e4984b5a8e41450664db00573f4e
SHA1 2cef17bbad732a8e1e87ed5b429af2ca217a978d
SHA512 a35baa1132cfc549b31295368cfe053981635e4c9447a97bfc5a4fbc10a9d4fd11645ddf803283a58518d51cfb299d6cda0438312a51954ed1e6eea1e9cc25d1
SSDEEP 3072:PhltPr5E4rkbnDxxwiqy8y+QPSIyqr/LZ91iudp5lUXfXLr:rV5E4ryVqTIv/LZfnwXfXL
MD5 SHA1 SHA512 SSDEEP

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Roaming6CYWXZt78x.exe

Path C:\Users\Admin\AppData\Roaming6CYWXZt78x.exe
Size 165KB
SHA256 2b3b33557fe9b753e3c536b913e68b4230772161d83bc2bf00f5f4ef4a37278b
MD5 7c77e4984b5a8e41450664db00573f4e
SHA1 2cef17bbad732a8e1e87ed5b429af2ca217a978d
SHA512 a35baa1132cfc549b31295368cfe053981635e4c9447a97bfc5a4fbc10a9d4fd11645ddf803283a58518d51cfb299d6cda0438312a51954ed1e6eea1e9cc25d1
SSDEEP 3072:PhltPr5E4rkbnDxxwiqy8y+QPSIyqr/LZ91iudp5lUXfXLr:rV5E4ryVqTIv/LZfnwXfXL
MD5 SHA1 SHA512 SSDEEP

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memory/1676-150-0x00007FFA8C150000-0x00007FFA8CC11000-memory.dmp

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memory/1676-149-0x0000000000DD0000-0x0000000000DFE000-memory.dmp

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memory/4268-145-0x0000000006380000-0x000000000641C000-memory.dmp

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memory/4268-144-0x0000000005C90000-0x0000000005D22000-memory.dmp

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memory/4268-140-0x0000000005100000-0x0000000005166000-memory.dmp

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memory/4268-139-0x0000000005640000-0x0000000005BE4000-memory.dmp

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memory/4268-136-0x0000000000540000-0x000000000056A000-memory.dmp

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memory/4428-138-0x00007FF727950000-0x00007FF7294AB000-memory.dmp

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memory/4428-141-0x00007FF727950000-0x00007FF7294AB000-memory.dmp

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memory/4428-142-0x00007FF727950000-0x00007FF7294AB000-memory.dmp

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memory/4428-143-0x00007FF727950000-0x00007FF7294AB000-memory.dmp

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memory/4428-137-0x00007FFAAB650000-0x00007FFAAB845000-memory.dmp

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