nymaim | eda99b91f8ed44267fe0a803090362ce54284c9ffdab19907c5f0260a3bf4537

Analysis

max time kernel
107s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
27/09/2022, 15:26

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General

Target
file.exe
Size 415KB
Sample220927-st7c8sehbl
SHA256 eda99b91f8ed44267fe0a803090362ce54284c9ffdab19907c5f0260a3bf4537
MD5 e7c6cd643a1f792a68dc54cd5c96f2ee
SHA1 b086cb3f6bf5dbfcadd0fdebc3a2426c2cc0305c
SHA512 baf11a8d30ffdda31abafc351c494cfb1b5de285316c3401eafd1bb13075fa6240c10da6e8e022a86f6525e18e1b8218748daef57b135cac941e5dcf0f0a785b
SSDEEP 6144:H141ZJA+m1wXXIaYs9t1/wQ2OsPt5zref0x7VsU+kwnigabwVfs:H14NFmIYa11NyVtV4kwiB
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
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1580	Cleaner.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	file.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 11 IoCs

pid	pid_target	Process	procid_target
4868	3628	WerFault.exe	83
4564	3628	WerFault.exe	83
4452	3628	WerFault.exe	83
2036	3628	WerFault.exe	83
5056	3628	WerFault.exe	83
3128	3628	WerFault.exe	83
4596	3628	WerFault.exe	83
628	3628	WerFault.exe	83
3776	3628	WerFault.exe	83
3872	3628	WerFault.exe	83
628	3628	WerFault.exe	83

Kills process with taskkill 1 IoCs

evasion

pid	Process
1484	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3628	file.exe
3628	file.exe
3628	file.exe
3628	file.exe
3628	file.exe
3628	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3628	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1580	Cleaner.exe
Token: SeDebugPrivilege	1484	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3628 wrote to memory of 4936	3628	file.exe	107
PID 3628 wrote to memory of 4936	3628	file.exe	107
PID 3628 wrote to memory of 4936	3628	file.exe	107
PID 4936 wrote to memory of 1580	4936	cmd.exe	109
PID 4936 wrote to memory of 1580	4936	cmd.exe	109
PID 3628 wrote to memory of 64	3628	file.exe	125
PID 3628 wrote to memory of 64	3628	file.exe	125
PID 3628 wrote to memory of 64	3628	file.exe	125
PID 64 wrote to memory of 1484	64	cmd.exe	129
PID 64 wrote to memory of 1484	64	cmd.exe	129
PID 64 wrote to memory of 1484	64	cmd.exe	129

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 behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3628
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3628 -s 452
  2⤵
  - Program crash
  PID:4868
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3628 -s 772
  2⤵
  - Program crash
  PID:4564
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3628 -s 780
  2⤵
  - Program crash
  PID:4452
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3628 -s 760
  2⤵
  - Program crash
  PID:2036
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3628 -s 872
  2⤵
  - Program crash
  PID:5056
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3628 -s 796
  2⤵
  - Program crash
  PID:3128
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3628 -s 1000
  2⤵
  - Program crash
  PID:4596
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3628 -s 1368
  2⤵
  - Program crash
  PID:628
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\O0ZmNcaGeRVMXdF55pMXr\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4936
- - C:\Users\Admin\AppData\Local\Temp\O0ZmNcaGeRVMXdF55pMXr\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\O0ZmNcaGeRVMXdF55pMXr\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1580
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3628 -s 1368
  2⤵
  - Program crash
  PID:3776
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3628 -s 1656
  2⤵
  - Program crash
  PID:3872
- 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:64
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1484
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3628 -s 472
  2⤵
  - Program crash
  PID:628

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 3628 -ip 3628
1⤵
PID:4220

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 3628 -ip 3628
1⤵
PID:1060

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3628 -ip 3628
1⤵
PID:2524

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3628 -ip 3628
1⤵
PID:3064

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 3628 -ip 3628
1⤵
PID:1572

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 3628 -ip 3628
1⤵
PID:3516

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 3628 -ip 3628
1⤵
PID:4824

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 3628 -ip 3628
1⤵
PID:960

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3628 -ip 3628
1⤵
PID:4176

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 500 -p 3628 -ip 3628
1⤵
PID:2160

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 596 -p 3628 -ip 3628
1⤵
PID:3292

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\O0ZmNcaGeRVMXdF55pMXr\Bunifu_UI_v1.5.3.dll
Size 236KB
SHA256 f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf
MD5 2ecb51ab00c5f340380ecf849291dbcf
SHA1 1a4dffbce2a4ce65495ed79eab42a4da3b660931
SHA512 e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b
SSDEEP 6144:SIQpxILDXGGMO7Ice9C5kQw2hWHcHTykhb:SIQpxILDXGGlET9n/cHG
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\O0ZmNcaGeRVMXdF55pMXr\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\O0ZmNcaGeRVMXdF55pMXr\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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memory/1580-140-0x0000025260A40000-0x0000025260BC2000-memory.dmp

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memory/1580-142-0x0000025262870000-0x00000252628B2000-memory.dmp

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memory/1580-143-0x00007FF833C10000-0x00007FF8346D1000-memory.dmp

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memory/1580-144-0x00007FF833C10000-0x00007FF8346D1000-memory.dmp

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memory/3628-139-0x0000000000400000-0x000000000046C000-memory.dmp

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memory/3628-132-0x000000000072E000-0x0000000000754000-memory.dmp

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memory/3628-145-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3628-134-0x0000000000400000-0x000000000046C000-memory.dmp

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memory/3628-133-0x00000000005B0000-0x00000000005EF000-memory.dmp

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memory/3628-151-0x0000000000400000-0x000000000046C000-memory.dmp

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