nymaim | bf013b062e5b04aaf94ac09820e6be80ba1d6451fc6bfd572e0dbdce704d3ecf

Analysis

max time kernel
76s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
21/11/2022, 03:33

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General

Target
file.exe
Size 1.4MB
Sample221121-d4k6esbf88
SHA256 bf013b062e5b04aaf94ac09820e6be80ba1d6451fc6bfd572e0dbdce704d3ecf
MD5 74ea6fe41dc31b2f8c935b2f1716be57
SHA1 70dee0df64121e9e98760cedba775c58ba78337e
SHA512 f06df37f587455aaec475faa7eb3ea837779be7d0ea4e1ec6a932c51e3970d20754827499d8ae8167d5dae6d07f593657a8d659f7ffeaae5daf1583bc3614f33
SSDEEP 24576:tizeB7uH/+73PA8SGMF+ihssF1lu0XME2so97S9iRQjwKwQMGBkUwyClgZIY7eC6:GexqARsfAcMm+7oiRmwHQhlwyCiNeVig
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
3956	is-7CH0E.tmp
3872	PrintFolders.exe
3012	YLGuump1QdCGg9.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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
3956	is-7CH0E.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 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\is-0VH0H.tmp	is-7CH0E.tmp
File created	C:\Program Files (x86)\PrintFolders\is-PFOPP.tmp	is-7CH0E.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-7CH0E.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-7CH0E.tmp
File created	C:\Program Files (x86)\PrintFolders\is-JPEVS.tmp	is-7CH0E.tmp
File created	C:\Program Files (x86)\PrintFolders\is-1BLDK.tmp	is-7CH0E.tmp
File created	C:\Program Files (x86)\PrintFolders\is-3F6C1.tmp	is-7CH0E.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4SCCA.tmp	is-7CH0E.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-7CH0E.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
3952	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3872	PrintFolders.exe
3872	PrintFolders.exe
3872	PrintFolders.exe
3872	PrintFolders.exe
3872	PrintFolders.exe
3872	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3952	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4980 wrote to memory of 3956	4980	file.exe	85
PID 4980 wrote to memory of 3956	4980	file.exe	85
PID 4980 wrote to memory of 3956	4980	file.exe	85
PID 3956 wrote to memory of 3872	3956	is-7CH0E.tmp	86
PID 3956 wrote to memory of 3872	3956	is-7CH0E.tmp	86
PID 3956 wrote to memory of 3872	3956	is-7CH0E.tmp	86
PID 3872 wrote to memory of 3012	3872	PrintFolders.exe	90
PID 3872 wrote to memory of 3012	3872	PrintFolders.exe	90
PID 3872 wrote to memory of 3012	3872	PrintFolders.exe	90
PID 3872 wrote to memory of 4480	3872	PrintFolders.exe	95
PID 3872 wrote to memory of 4480	3872	PrintFolders.exe	95
PID 3872 wrote to memory of 4480	3872	PrintFolders.exe	95
PID 4480 wrote to memory of 3952	4480	cmd.exe	97
PID 4480 wrote to memory of 3952	4480	cmd.exe	97
PID 4480 wrote to memory of 3952	4480	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4980
- C:\Users\Admin\AppData\Local\Temp\is-NSRF3.tmp\is-7CH0E.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-NSRF3.tmp\is-7CH0E.tmp" /SL4 $80056 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1267017 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3956
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:3872
  - - C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\YLGuump1QdCGg9.exe
      4⤵
      Executes dropped EXE
      PID:3012
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4480
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3952

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

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.7MB
SHA256 88a02af8f884889e6391e2115bfdf54feb4aec4982e6f9f3c0317b3d76b922ea
MD5 651a0ee72d8b6b86416dad2362b45d1f
SHA1 1fd69b56c0969bedc44975828e6ec0a48515e902
SHA512 d9af716aca5cf07e08aa0eb3a61a1f957d01e2342041d1eb0d7208d9faa7fb00ec736596b043b6d7ba838c0c8eafcf647620ec33923a91107f6a6a1eb617e1c1
SSDEEP 24576:4+n+D+q+g++X0+/S+v+OP2g+tttiuRy7CCs9kypECHJqD5D6xwjQoel:R+ajgnXN/72lJ7guRUCqCpq1uE4l
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.7MB
SHA256 88a02af8f884889e6391e2115bfdf54feb4aec4982e6f9f3c0317b3d76b922ea
MD5 651a0ee72d8b6b86416dad2362b45d1f
SHA1 1fd69b56c0969bedc44975828e6ec0a48515e902
SHA512 d9af716aca5cf07e08aa0eb3a61a1f957d01e2342041d1eb0d7208d9faa7fb00ec736596b043b6d7ba838c0c8eafcf647620ec33923a91107f6a6a1eb617e1c1
SSDEEP 24576:4+n+D+q+g++X0+/S+v+OP2g+tttiuRy7CCs9kypECHJqD5D6xwjQoel:R+ajgnXN/72lJ7guRUCqCpq1uE4l
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

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

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is-7CH0E.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-NSRF3.tmp\is-7CH0E.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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is-7CH0E.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-NSRF3.tmp\is-7CH0E.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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YLGuump1QdCGg9.exe

Path C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\YLGuump1QdCGg9.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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YLGuump1QdCGg9.exe

Path C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\YLGuump1QdCGg9.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/3872-143-0x0000000000400000-0x00000000013B1000-memory.dmp

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memory/3872-142-0x0000000000400000-0x00000000013B1000-memory.dmp

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memory/3872-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3872-151-0x0000000000400000-0x00000000013B1000-memory.dmp

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memory/3872-154-0x0000000000400000-0x00000000013B1000-memory.dmp

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memory/4980-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4980-137-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4980-155-0x0000000000400000-0x0000000000413000-memory.dmp

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