nymaim | 4e847643568276229dbc26f82152bbbbd2c5bf86b6bbd43080e297285c545b8c

Analysis

max time kernel
91s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
10/10/2022, 09:19

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General

Target
file.exe
Size 406KB
Sample221010-k96smsbecm
SHA256 4e847643568276229dbc26f82152bbbbd2c5bf86b6bbd43080e297285c545b8c
MD5 1eb79d53638010bc026896a652f84805
SHA1 011cb8739d809bd2a40def02532c6ad6537ab1d4
SHA512 df50bdf9de395aa689454d868f9331e571528d70c2c887c90aa240dc6b592182048ed86e96be03701d14568ad430bb48c79552b988d011bdf6c6a31cfe722190
SSDEEP 6144:EgwHVX2xh/b5A39QEc5Vs0wDq4beYbvZsnMB1rW9313krwVfquS:Eg4X2r/a3oiVu4bD2nM3W9lUd
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

208.67.104.97
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 1 IoCs

pid	Process
348	xDgNYfwCQxNNX.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	file.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 9 IoCs

pid	pid_target	Process	procid_target
4812	4752	WerFault.exe	80
1596	4752	WerFault.exe	80
4788	4752	WerFault.exe	80
2780	4752	WerFault.exe	80
2760	4752	WerFault.exe	80
5064	4752	WerFault.exe	80
1516	4752	WerFault.exe	80
4540	4752	WerFault.exe	80
3212	4752	WerFault.exe	80

Kills process with taskkill 1 IoCs

evasion

pid	Process
4364	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4752	file.exe
4752	file.exe
4752	file.exe
4752	file.exe
4752	file.exe
4752	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4364	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4752 wrote to memory of 348	4752	file.exe	100
PID 4752 wrote to memory of 348	4752	file.exe	100
PID 4752 wrote to memory of 348	4752	file.exe	100
PID 4752 wrote to memory of 800	4752	file.exe	106
PID 4752 wrote to memory of 800	4752	file.exe	106
PID 4752 wrote to memory of 800	4752	file.exe	106
PID 800 wrote to memory of 4364	800	cmd.exe	110
PID 800 wrote to memory of 4364	800	cmd.exe	110
PID 800 wrote to memory of 4364	800	cmd.exe	110

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4752
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4752 -s 452
  2⤵
  - Program crash
  PID:4812
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4752 -s 764
  2⤵
  - Program crash
  PID:1596
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4752 -s 804
  2⤵
  - Program crash
  PID:4788
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4752 -s 804
  2⤵
  - Program crash
  PID:2780
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4752 -s 864
  2⤵
  - Program crash
  PID:2760
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4752 -s 968
  2⤵
  - Program crash
  PID:5064
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4752 -s 796
  2⤵
  - Program crash
  PID:1516
- C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\xDgNYfwCQxNNX.exe
  2⤵
  - Executes dropped EXE
  PID:348
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4752 -s 1436
  2⤵
  - Program crash
  PID:4540
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:800
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4364
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4752 -s 1552
  2⤵
  - Program crash
  PID:3212

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4752 -ip 4752
1⤵
PID:4604

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 4752 -ip 4752
1⤵
PID:4624

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 4752 -ip 4752
1⤵
PID:1568

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 4752 -ip 4752
1⤵
PID:4528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 588 -p 4752 -ip 4752
1⤵
PID:1664

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 612 -p 4752 -ip 4752
1⤵
PID:368

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 628 -p 4752 -ip 4752
1⤵
PID:5008

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 600 -p 4752 -ip 4752
1⤵
PID:5056

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 636 -p 4752 -ip 4752
1⤵
PID:4356

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

xDgNYfwCQxNNX.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\xDgNYfwCQxNNX.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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xDgNYfwCQxNNX.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\xDgNYfwCQxNNX.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/4752-132-0x00000000005A7000-0x00000000005D7000-memory.dmp

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memory/4752-133-0x0000000000960000-0x00000000009B3000-memory.dmp

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memory/4752-134-0x0000000000400000-0x000000000046B000-memory.dmp

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memory/4752-138-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4752-142-0x00000000005A7000-0x00000000005D7000-memory.dmp

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memory/4752-143-0x0000000000400000-0x000000000046B000-memory.dmp

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memory/4752-146-0x0000000000400000-0x000000000046B000-memory.dmp

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