nymaim | 7b414817a47d855803cc78ee30ed0a76c9a37dca63a3d8437dde45445b2fe691

Analysis

max time kernel
102s
max time network
131s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
01/10/2022, 03:00

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General

Target
file.exe
Size 233KB
Sample221001-dha4bsfda2
SHA256 7b414817a47d855803cc78ee30ed0a76c9a37dca63a3d8437dde45445b2fe691
MD5 018dfa9a3f91dd8e55c43bd46426f677
SHA1 2931aa1a6bc2041449518664b40514055092374c
SHA512 9987e183854a7600bb075870fbee067255e422dd1e6da563580ee86cbf8c018138c6aea6652bd32612c76f383056826dd3adeb0056f7b3e90184e891ebc5899c
SSDEEP 6144:xnCliXtM8mMt4WiiE6zoCANBbTbTbqQmJ:xyiNXt40EmrYBbvTbqQY
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
4164	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
1356	4900	WerFault.exe	78
4868	4900	WerFault.exe	78
1660	4900	WerFault.exe	78
3764	4900	WerFault.exe	78
2632	4900	WerFault.exe	78
3484	4900	WerFault.exe	78
3424	4900	WerFault.exe	78
440	4900	WerFault.exe	78
1388	4900	WerFault.exe	78
4412	4900	WerFault.exe	78
1668	4900	WerFault.exe	78

Kills process with taskkill 1 IoCs

evasion

pid	Process
3484	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4900	file.exe
4900	file.exe
4900	file.exe
4900	file.exe
4900	file.exe
4900	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4900	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4164	Cleaner.exe
Token: SeDebugPrivilege	3484	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4900 wrote to memory of 948	4900	file.exe	106
PID 4900 wrote to memory of 948	4900	file.exe	106
PID 4900 wrote to memory of 948	4900	file.exe	106
PID 948 wrote to memory of 4164	948	cmd.exe	108
PID 948 wrote to memory of 4164	948	cmd.exe	108
PID 4900 wrote to memory of 3100	4900	file.exe	124
PID 4900 wrote to memory of 3100	4900	file.exe	124
PID 4900 wrote to memory of 3100	4900	file.exe	124
PID 3100 wrote to memory of 3484	3100	cmd.exe	128
PID 3100 wrote to memory of 3484	3100	cmd.exe	128
PID 3100 wrote to memory of 3484	3100	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:4900
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4900 -s 456
  2⤵
  - Program crash
  PID:1356
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4900 -s 776
  2⤵
  - Program crash
  PID:4868
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4900 -s 764
  2⤵
  - Program crash
  PID:1660
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4900 -s 764
  2⤵
  - Program crash
  PID:3764
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4900 -s 804
  2⤵
  - Program crash
  PID:2632
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4900 -s 848
  2⤵
  - Program crash
  PID:3484
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4900 -s 848
  2⤵
  - Program crash
  PID:3424
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4900 -s 1376
  2⤵
  - Program crash
  PID:440
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\D0IebVf1FjQFFz64\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:948
- - C:\Users\Admin\AppData\Local\Temp\D0IebVf1FjQFFz64\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\D0IebVf1FjQFFz64\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4164
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4900 -s 1348
  2⤵
  - Program crash
  PID:1388
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4900 -s 1680
  2⤵
  - Program crash
  PID:4412
- 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:3100
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3484
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4900 -s 496
  2⤵
  - Program crash
  PID:1668

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4900 -ip 4900
1⤵
PID:364

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4900 -ip 4900
1⤵
PID:2404

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 4900 -ip 4900
1⤵
PID:2872

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4900 -ip 4900
1⤵
PID:1472

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 4900 -ip 4900
1⤵
PID:3876

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4900 -ip 4900
1⤵
PID:3596

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 4900 -ip 4900
1⤵
PID:1008

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 4900 -ip 4900
1⤵
PID:2180

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4900 -ip 4900
1⤵
PID:2364

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 4900 -ip 4900
1⤵
PID:5088

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4900 -ip 4900
1⤵
PID:4952

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\D0IebVf1FjQFFz64\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\D0IebVf1FjQFFz64\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\D0IebVf1FjQFFz64\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/4164-144-0x00007FFA529B0000-0x00007FFA53471000-memory.dmp

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memory/4164-139-0x0000021F1BEA0000-0x0000021F1BFF8000-memory.dmp

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memory/4164-143-0x0000021F1DD80000-0x0000021F1DDC2000-memory.dmp

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memory/4164-145-0x00007FFA529B0000-0x00007FFA53471000-memory.dmp

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memory/4900-140-0x000000000078D000-0x00000000007B3000-memory.dmp

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memory/4900-142-0x0000000000400000-0x0000000000597000-memory.dmp

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memory/4900-133-0x0000000000730000-0x000000000076F000-memory.dmp

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memory/4900-146-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4900-134-0x0000000000400000-0x0000000000597000-memory.dmp

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memory/4900-132-0x000000000078D000-0x00000000007B3000-memory.dmp

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memory/4900-152-0x0000000000400000-0x0000000000597000-memory.dmp

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