nymaim | 4b76336129b648df7bcb14be6ecc06b9addedff0910cd2593838eeed98832008

Analysis

max time kernel
90s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
09/01/2023, 08:46

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General

Target
file.exe
Size 1.1MB
Sample230109-kpajpsde97
SHA256 4b76336129b648df7bcb14be6ecc06b9addedff0910cd2593838eeed98832008
MD5 57b214a9c5b68c52d7d2e0340ee3e269
SHA1 1061495d1dddac34fe41c3c7f63b18b55c9ccfee
SHA512 78e1f0bb1be230597ec9456ba429609b5c326558a98e4b383d5c037c6b8476e864f46d4872c94b629dd477022ce6ae82e72e1b6cfb85225a8ad6e2892de57314
SSDEEP 24576:R20VPnwaVmbnl0nSzrgYVmiT17MLQxhvx2cSknSkl5l/Hlc:R2anwaVmbnl0nHYwc72Q12ctl50
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171
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 3 IoCs

pid	Process
916	file.tmp
400	JitFiles135.exe
4832	L33EZrI.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	JitFiles135.exe

Loads dropped DLL 1 IoCs

pid	Process
916	file.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 17 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Split Files\language\is-8C25A.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-06J11.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-DOD07.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-OV98D.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-J46OG.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-K8ELK.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\JitFiles135.exe	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-3K7V0.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-1RP3M.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-8ASDR.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-18SP6.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\is-4QPOO.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-ANNJD.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-TFIO4.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-1DMUO.tmp	file.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
4152	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
400	JitFiles135.exe
400	JitFiles135.exe
400	JitFiles135.exe
400	JitFiles135.exe
400	JitFiles135.exe
400	JitFiles135.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4152	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4808 wrote to memory of 916	4808	file.exe	79
PID 4808 wrote to memory of 916	4808	file.exe	79
PID 4808 wrote to memory of 916	4808	file.exe	79
PID 916 wrote to memory of 400	916	file.tmp	80
PID 916 wrote to memory of 400	916	file.tmp	80
PID 916 wrote to memory of 400	916	file.tmp	80
PID 400 wrote to memory of 4832	400	JitFiles135.exe	81
PID 400 wrote to memory of 4832	400	JitFiles135.exe	81
PID 400 wrote to memory of 4832	400	JitFiles135.exe	81
PID 400 wrote to memory of 3192	400	JitFiles135.exe	89
PID 400 wrote to memory of 3192	400	JitFiles135.exe	89
PID 400 wrote to memory of 3192	400	JitFiles135.exe	89
PID 3192 wrote to memory of 4152	3192	cmd.exe	91
PID 3192 wrote to memory of 4152	3192	cmd.exe	91
PID 3192 wrote to memory of 4152	3192	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4808
- C:\Users\Admin\AppData\Local\Temp\is-IHN8K.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-IHN8K.tmp\file.tmp" /SL5="$B006E,866809,51712,C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:916
- - C:\Program Files (x86)\Split Files\JitFiles135.exe
    "C:\Program Files (x86)\Split Files\JitFiles135.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:400
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\L33EZrI.exe
      4⤵
      Executes dropped EXE
      PID:4832
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "JitFiles135.exe" /f & erase "C:\Program Files (x86)\Split Files\JitFiles135.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3192
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "JitFiles135.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4152

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

JitFiles135.exe

Path C:\Program Files (x86)\Split Files\JitFiles135.exe
Size 1.6MB
SHA256 48603381a6eccfc03a15afe12f582df8e6b4122f841e61abbd675f843aa8cfa2
MD5 59848fbb062671ec5537bfe61b66bc9c
SHA1 bde192a393b784cbe73f58479bac8153046b024b
SHA512 d01bfce255926e450c3f8c3ffdc8c70ad9f487e77d1890e5bc8167af87007246220c107dc7501dbeedd89cfd25f5f94ac2affcf21931be0e985355d6d5b0a7e1
SSDEEP 24576:55A2PNoc0SoljLHAvmidlY5CfK7qB36wYHTNpIkPY+MhCXDTxrX:s2PNoc0SoeONy36zGfmDJ
MD5 SHA1 SHA512 SSDEEP

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JitFiles135.exe

Path C:\Program Files (x86)\Split Files\JitFiles135.exe
Size 1.6MB
SHA256 48603381a6eccfc03a15afe12f582df8e6b4122f841e61abbd675f843aa8cfa2
MD5 59848fbb062671ec5537bfe61b66bc9c
SHA1 bde192a393b784cbe73f58479bac8153046b024b
SHA512 d01bfce255926e450c3f8c3ffdc8c70ad9f487e77d1890e5bc8167af87007246220c107dc7501dbeedd89cfd25f5f94ac2affcf21931be0e985355d6d5b0a7e1
SSDEEP 24576:55A2PNoc0SoljLHAvmidlY5CfK7qB36wYHTNpIkPY+MhCXDTxrX:s2PNoc0SoeONy36zGfmDJ
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-IHN8K.tmp\file.tmp
Size 692KB
SHA256 30893d74dace626f98a12862d02b582ecec4671c338f8638f637e53a700e5dd1
MD5 7958276140c2d23a53ae8a1f2aa20771
SHA1 fd6b462e6d69efff1d57575b084212c8e57367aa
SHA512 772c61d78659ce76c4c7ea36bf092958b212414a874434e06272c709d221e74855a388273bcc677e94dff61cd593aba7b74368f716784e68a40516d28da9477b
SSDEEP 12288:cuA/ac4cUrPN37qzHxA6bA7xfmL+weNERfJbkrNZcRgJmuxffDkNmXEx9BF:cN/ac4cUrPN37qzHxA6odmL+tNE70tmF
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-IHN8K.tmp\file.tmp
Size 692KB
SHA256 30893d74dace626f98a12862d02b582ecec4671c338f8638f637e53a700e5dd1
MD5 7958276140c2d23a53ae8a1f2aa20771
SHA1 fd6b462e6d69efff1d57575b084212c8e57367aa
SHA512 772c61d78659ce76c4c7ea36bf092958b212414a874434e06272c709d221e74855a388273bcc677e94dff61cd593aba7b74368f716784e68a40516d28da9477b
SSDEEP 12288:cuA/ac4cUrPN37qzHxA6bA7xfmL+weNERfJbkrNZcRgJmuxffDkNmXEx9BF:cN/ac4cUrPN37qzHxA6odmL+tNE70tmF
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-RTBR0.tmp\_isetup\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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L33EZrI.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\L33EZrI.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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L33EZrI.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\L33EZrI.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/400-151-0x0000000000400000-0x000000000139B000-memory.dmp

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memory/400-142-0x0000000000400000-0x000000000139B000-memory.dmp

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memory/400-143-0x0000000000400000-0x000000000139B000-memory.dmp

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memory/400-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/400-154-0x0000000000400000-0x000000000139B000-memory.dmp

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memory/4808-138-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/4808-132-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/4808-155-0x0000000000400000-0x0000000000414000-memory.dmp

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