nymaim | 8a8b801b11bf955c8342399aab087bb89202fa7626759349d0290e753b4cb1e7

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
06/10/2022, 06:23

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General

Target
file.exe
Size 233KB
Sample221006-g5f5msggdr
SHA256 8a8b801b11bf955c8342399aab087bb89202fa7626759349d0290e753b4cb1e7
MD5 a59994f1b18506032863d28916fc65c4
SHA1 e46d05918842bccd065ed7d3bf0f1fb2868da585
SHA512 b1461914557c763c2ca3cc271f7669e4e8092f42bea6292201645752ae4e41bfafc4a2109f58419da688933c442cbb9746822ef50f91e025702c4abe7ba77040
SSDEEP 3072:bgWM68e++sHLPtw/JFZ+fJ6sStT9E37dDvoIplSSW2mFhjHeKuroVJdnVnntgQBV:kc+rV+AJEK/pB+sDUPdVntR2D
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
3980	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
1908	5012	WerFault.exe	80
1752	5012	WerFault.exe	80
4528	5012	WerFault.exe	80
4468	5012	WerFault.exe	80
2152	5012	WerFault.exe	80
1472	5012	WerFault.exe	80
4420	5012	WerFault.exe	80
4884	5012	WerFault.exe	80
2712	5012	WerFault.exe	80
1440	5012	WerFault.exe	80
1760	5012	WerFault.exe	80

Kills process with taskkill 1 IoCs

evasion

pid	Process
4588	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5012	file.exe
5012	file.exe
5012	file.exe
5012	file.exe
5012	file.exe
5012	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
5012	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3980	Cleaner.exe
Token: SeDebugPrivilege	4588	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 5012 wrote to memory of 4368	5012	file.exe	105
PID 5012 wrote to memory of 4368	5012	file.exe	105
PID 5012 wrote to memory of 4368	5012	file.exe	105
PID 4368 wrote to memory of 3980	4368	cmd.exe	107
PID 4368 wrote to memory of 3980	4368	cmd.exe	107
PID 5012 wrote to memory of 3252	5012	file.exe	115
PID 5012 wrote to memory of 3252	5012	file.exe	115
PID 5012 wrote to memory of 3252	5012	file.exe	115
PID 3252 wrote to memory of 4588	3252	cmd.exe	119
PID 3252 wrote to memory of 4588	3252	cmd.exe	119
PID 3252 wrote to memory of 4588	3252	cmd.exe	119

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:5012
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5012 -s 456
  2⤵
  - Program crash
  PID:1908
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5012 -s 772
  2⤵
  - Program crash
  PID:1752
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5012 -s 776
  2⤵
  - Program crash
  PID:4528
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5012 -s 776
  2⤵
  - Program crash
  PID:4468
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5012 -s 856
  2⤵
  - Program crash
  PID:2152
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5012 -s 936
  2⤵
  - Program crash
  PID:1472
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5012 -s 1008
  2⤵
  - Program crash
  PID:4420
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5012 -s 1368
  2⤵
  - Program crash
  PID:4884
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\wFl0vQn8j7Tn6vP2B\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4368
- - C:\Users\Admin\AppData\Local\Temp\wFl0vQn8j7Tn6vP2B\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\wFl0vQn8j7Tn6vP2B\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:3980
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5012 -s 1388
  2⤵
  - Program crash
  PID:2712
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5012 -s 1664
  2⤵
  - Program crash
  PID:1440
- 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:3252
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4588
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5012 -s 492
  2⤵
  - Program crash
  PID:1760

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 5012 -ip 5012
1⤵
PID:3188

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 5012 -ip 5012
1⤵
PID:3720

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 5012 -ip 5012
1⤵
PID:3360

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 5012 -ip 5012
1⤵
PID:3896

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 5012 -ip 5012
1⤵
PID:2244

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 588 -p 5012 -ip 5012
1⤵
PID:4728

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 596 -p 5012 -ip 5012
1⤵
PID:3376

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 584 -p 5012 -ip 5012
1⤵
PID:4804

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 588 -p 5012 -ip 5012
1⤵
PID:4172

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 632 -p 5012 -ip 5012
1⤵
PID:4216

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 596 -p 5012 -ip 5012
1⤵
PID:1140

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\wFl0vQn8j7Tn6vP2B\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\wFl0vQn8j7Tn6vP2B\Cleaner.exe
Size 2.4MB
SHA256 cd6bb6fdf80bec69630a61707383e6430463751463635f35fce42eb97daa7060
MD5 79754768767380ef36ef446c6a1709e4
SHA1 2af83a6e20d7efc3119d312534b3f3968d17776e
SHA512 6f88e9e5f5309ff1e87666a8066333660db37f85031db6dbfb28460700a31d303e140f8dd5fe0e71f2de01706ac7e1317b8a6fd2d992a47bdaa3bb591965f461
SSDEEP 24576:wO4dHPD/oAR4d3G/oAXndxzGmTG2/mR29SGeodc0GmTG2/mR6Trr2h60qP:w/PD/DL/D9CuZrr2h60qP
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\wFl0vQn8j7Tn6vP2B\Cleaner.exe
Size 2.4MB
SHA256 cd6bb6fdf80bec69630a61707383e6430463751463635f35fce42eb97daa7060
MD5 79754768767380ef36ef446c6a1709e4
SHA1 2af83a6e20d7efc3119d312534b3f3968d17776e
SHA512 6f88e9e5f5309ff1e87666a8066333660db37f85031db6dbfb28460700a31d303e140f8dd5fe0e71f2de01706ac7e1317b8a6fd2d992a47bdaa3bb591965f461
SSDEEP 24576:wO4dHPD/oAR4d3G/oAXndxzGmTG2/mR29SGeodc0GmTG2/mR6Trr2h60qP:w/PD/DL/D9CuZrr2h60qP
MD5 SHA1 SHA512 SSDEEP

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memory/3980-145-0x00007FFA52BA0000-0x00007FFA53661000-memory.dmp

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memory/3980-143-0x00007FFA52BA0000-0x00007FFA53661000-memory.dmp

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memory/3980-142-0x0000021437940000-0x0000021437982000-memory.dmp

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memory/3980-140-0x000002141BE20000-0x000002141BF92000-memory.dmp

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memory/5012-132-0x00000000007DD000-0x0000000000803000-memory.dmp

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memory/5012-135-0x00000000007DD000-0x0000000000803000-memory.dmp

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memory/5012-144-0x0000000000400000-0x0000000000596000-memory.dmp

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memory/5012-134-0x0000000000400000-0x0000000000596000-memory.dmp

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memory/5012-146-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/5012-133-0x0000000000770000-0x00000000007AF000-memory.dmp

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memory/5012-152-0x0000000000400000-0x0000000000596000-memory.dmp

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