nymaim | 31d3989bd568a29e211f378c9812e51ac312d4b0be152a8b4e102204dda1fd7f

Analysis

max time kernel
161s
max time network
179s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
11/10/2022, 12:35

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General

Target
file.exe
Size 340KB
Sample221011-psb9xsebb3
SHA256 31d3989bd568a29e211f378c9812e51ac312d4b0be152a8b4e102204dda1fd7f
MD5 b2a861f82ac08a477f4d0d979b7ab14d
SHA1 3a894274686b1b3034f7b145449fd0b1a328a870
SHA512 008258b11c803565249f9c951ccd4ffc326575abafefa8cc0704ede771faacff9813dcdbf2799d895c230a50efafc67d6c1ea7a700b233ac9fab8705341f824a
SSDEEP 6144:512KuJLqBKVeCaB0haTbCGATMElxPC7+eNI5+IxmD+xKTE:5gKuJAKACdYTbChMIxPCRq5+ND1E
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

45.15.156.54
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
1148	AMVKz3na.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-1-5-21-2629973501-4017243118-3254762364-1000\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 10 IoCs

pid	pid_target	Process	procid_target
3140	1836	WerFault.exe	81
2132	1836	WerFault.exe	81
3472	1836	WerFault.exe	81
344	1836	WerFault.exe	81
2516	1836	WerFault.exe	81
4196	1836	WerFault.exe	81
4752	1836	WerFault.exe	81
4452	1836	WerFault.exe	81
2860	1836	WerFault.exe	81
1456	1836	WerFault.exe	81

Kills process with taskkill 1 IoCs

evasion

pid	Process
412	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1836	file.exe
1836	file.exe
1836	file.exe
1836	file.exe
1836	file.exe
1836	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	412	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1836 wrote to memory of 1148	1836	file.exe	100
PID 1836 wrote to memory of 1148	1836	file.exe	100
PID 1836 wrote to memory of 1148	1836	file.exe	100
PID 1836 wrote to memory of 5056	1836	file.exe	106
PID 1836 wrote to memory of 5056	1836	file.exe	106
PID 1836 wrote to memory of 5056	1836	file.exe	106
PID 5056 wrote to memory of 412	5056	cmd.exe	110
PID 5056 wrote to memory of 412	5056	cmd.exe	110
PID 5056 wrote to memory of 412	5056	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:1836
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1836 -s 460
  2⤵
  - Program crash
  PID:3140
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1836 -s 716
  2⤵
  - Program crash
  PID:2132
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1836 -s 784
  2⤵
  - Program crash
  PID:3472
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1836 -s 784
  2⤵
  - Program crash
  PID:344
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1836 -s 716
  2⤵
  - Program crash
  PID:2516
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1836 -s 928
  2⤵
  - Program crash
  PID:4196
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1836 -s 960
  2⤵
  - Program crash
  PID:4752
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1836 -s 1088
  2⤵
  - Program crash
  PID:4452
- C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\AMVKz3na.exe
  2⤵
  - Executes dropped EXE
  PID:1148
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1836 -s 1456
  2⤵
  - Program crash
  PID:2860
- 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:5056
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:412
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1836 -s 1428
  2⤵
  - Program crash
  PID:1456

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1836 -ip 1836
1⤵
PID:4924

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 1836 -ip 1836
1⤵
PID:4108

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1836 -ip 1836
1⤵
PID:744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1836 -ip 1836
1⤵
PID:3236

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 1836 -ip 1836
1⤵
PID:2340

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 1836 -ip 1836
1⤵
PID:4484

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 1836 -ip 1836
1⤵
PID:752

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 1836 -ip 1836
1⤵
PID:4824

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 1836 -ip 1836
1⤵
PID:1544

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 1836 -ip 1836
1⤵
PID:4648

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

Replay Monitor

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Downloads

AMVKz3na.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\AMVKz3na.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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AMVKz3na.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\AMVKz3na.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/1836-135-0x00000000007CD000-0x00000000007FE000-memory.dmp

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memory/1836-136-0x0000000000750000-0x00000000007A3000-memory.dmp

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memory/1836-132-0x00000000007CD000-0x00000000007FE000-memory.dmp

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memory/1836-134-0x0000000000400000-0x00000000005B3000-memory.dmp

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memory/1836-140-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1836-133-0x0000000000750000-0x00000000007A3000-memory.dmp

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memory/1836-146-0x00000000007CD000-0x00000000007FE000-memory.dmp

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memory/1836-147-0x0000000000400000-0x00000000005B3000-memory.dmp

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