nymaim | b13d767ec9489f7a673f11048a0bf0638385e41a99e3535cb2fcd5fbbd7e09ea

Analysis

max time kernel
101s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
30/09/2022, 02:26

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General

Target
file.exe
Size 230KB
Sample220930-cwvt8acda4
SHA256 b13d767ec9489f7a673f11048a0bf0638385e41a99e3535cb2fcd5fbbd7e09ea
MD5 7d214fb7a7ca0f4a5e09bda093167769
SHA1 1146bdd6c823250f8ec282446547376cd9a32e94
SHA512 81452560540fc5be7e1995ad30ac8c205c55557a0a3f5145a94fd646a85aae0128b1cc571cfd010b911d99aeb627e8e5ab7c391fbae70c8c4c73a991559e40ad
SSDEEP 6144:Zf9agWvFXUJ9nNRD+takclWh1VkP/XfF:Zf9aguFXUfnN9G4s1VkX9
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
4596	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
3200	644	WerFault.exe	84
2632	644	WerFault.exe	84
1016	644	WerFault.exe	84
2548	644	WerFault.exe	84
4804	644	WerFault.exe	84
380	644	WerFault.exe	84
4504	644	WerFault.exe	84
3440	644	WerFault.exe	84
2252	644	WerFault.exe	84
3408	644	WerFault.exe	84
3400	644	WerFault.exe	84

Kills process with taskkill 1 IoCs

evasion

pid	Process
1016	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
644	file.exe
644	file.exe
644	file.exe
644	file.exe
644	file.exe
644	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
644	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4596	Cleaner.exe
Token: SeDebugPrivilege	1016	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 644 wrote to memory of 4640	644	file.exe	112
PID 644 wrote to memory of 4640	644	file.exe	112
PID 644 wrote to memory of 4640	644	file.exe	112
PID 4640 wrote to memory of 4596	4640	cmd.exe	114
PID 4640 wrote to memory of 4596	4640	cmd.exe	114
PID 644 wrote to memory of 2052	644	file.exe	124
PID 644 wrote to memory of 2052	644	file.exe	124
PID 644 wrote to memory of 2052	644	file.exe	124
PID 2052 wrote to memory of 1016	2052	cmd.exe	128
PID 2052 wrote to memory of 1016	2052	cmd.exe	128
PID 2052 wrote to memory of 1016	2052	cmd.exe	128

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:644
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 644 -s 452
  2⤵
  - Program crash
  PID:3200
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 644 -s 772
  2⤵
  - Program crash
  PID:2632
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 644 -s 812
  2⤵
  - Program crash
  PID:1016
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 644 -s 828
  2⤵
  - Program crash
  PID:2548
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 644 -s 836
  2⤵
  - Program crash
  PID:4804
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 644 -s 928
  2⤵
  - Program crash
  PID:380
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 644 -s 1000
  2⤵
  - Program crash
  PID:4504
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 644 -s 1372
  2⤵
  - Program crash
  PID:3440
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\KaEhiRUV6Pd8uaqVOJDwoIotQ96MI\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4640
- - C:\Users\Admin\AppData\Local\Temp\KaEhiRUV6Pd8uaqVOJDwoIotQ96MI\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\KaEhiRUV6Pd8uaqVOJDwoIotQ96MI\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4596
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 644 -s 1372
  2⤵
  - Program crash
  PID:2252
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 644 -s 1660
  2⤵
  - Program crash
  PID:3408
- 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:2052
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1016
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 644 -s 492
  2⤵
  - Program crash
  PID:3400

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 644 -ip 644
1⤵
PID:512

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 644 -ip 644
1⤵
PID:448

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 644 -ip 644
1⤵
PID:2484

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 644 -ip 644
1⤵
PID:4640

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 644 -ip 644
1⤵
PID:3640

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 644 -ip 644
1⤵
PID:2228

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 644 -ip 644
1⤵
PID:4524

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 584 -p 644 -ip 644
1⤵
PID:4792

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 644 -ip 644
1⤵
PID:2212

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 644 -ip 644
1⤵
PID:4992

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 600 -p 644 -ip 644
1⤵
PID:2620

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\KaEhiRUV6Pd8uaqVOJDwoIotQ96MI\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\KaEhiRUV6Pd8uaqVOJDwoIotQ96MI\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\KaEhiRUV6Pd8uaqVOJDwoIotQ96MI\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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memory/644-145-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/644-151-0x0000000000400000-0x0000000000597000-memory.dmp

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memory/644-132-0x0000000000759000-0x000000000077F000-memory.dmp

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memory/644-134-0x0000000000400000-0x0000000000597000-memory.dmp

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memory/644-142-0x0000000000400000-0x0000000000597000-memory.dmp

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memory/644-133-0x00000000022E0000-0x000000000231F000-memory.dmp

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memory/4596-144-0x00007FF98EBA0000-0x00007FF98F661000-memory.dmp

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memory/4596-143-0x00007FF98EBA0000-0x00007FF98F661000-memory.dmp

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memory/4596-141-0x000002CE0A990000-0x000002CE0A9D2000-memory.dmp

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memory/4596-139-0x000002CE08B10000-0x000002CE08C68000-memory.dmp

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